Environment Impact Assessment Report for N i ngbo J i ...documents1.worldbank.org/curated/en/954681468769260060/pdf/multi0page.pdfNingbo is one of the earliest coastal cities opening

E740 v.5March 2003

WB LOAN

Environment Impact Assessment Report forN i ngbo J i angdongnanqu WWTP & Sewerage Project

(for approval)

RESEARCH & DESIGN ACADEMY OF ENVIRONMENTAL PROTECTION OFNINGBO

National EA Certification: First Grade No.2004

March, 2003

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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project

Table of Division of responsibility for EnvironmentImpact Assessment of Ningbo Jiangdongnanqu WWTP &

Sewerage Project

Ningbo Jiangdongnanqu WWTP & SewerageProject Name Project

Project Document Environment Impact Assessment Report

Classification Public utility engineeringof the project

Commission Ningbo Urban Infrastructure Developmentunit. Office

Commissioned Research & Design Academy of Environmentunit Protection of Ningbo

Assessment No.2004,First Grade, NationalCertification Environment Assessment

Dean, Legal Jin Jianqiangperson

Principal ofimplement agency Liu ZhongProj ectPrijci Pan Peifeng (Post No,A20040027)principal

Technical Liu Zhong (Post No.A20040004)auditing Zhao Yongcai (Post No.A20040018)


Main Participants and Their Titles

Name Specialty Title Post No.

Bi Yulong Environmental Senior engineer A20040006chemistry

Shang Weichun Environmental Engineer A20040022Engineering

EnvironmentalLuo Deyu Engineeng Engineer A20040016

Engineering

Bao Wihong Environmental Egne 2000Bao Wihong Engineering Egne 2000

Pan Peifeng Ecological Engineer A20040027. ~Entironment

Wu Wenjun Environmental Engineer A20040011software

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Contents

1 FOREWORD ...................................................... 7

1.1 BACKGROUND .................. 71.2 OBJECTIVES OF THE EIA .................. 81.3 BASIS FOR THE EIA ................ 91.4 SCOPE OF THE EIA ................ 91.5 ASSESSMENT STANDARDS .. 10

1.5.1 Environmental Quality Standard ................................................... 101.5.2 Pollutants Emission Standards ..................................................... 1 ]

1.6 ENVIRONMENTAL PROTECTION OBJECTIVES . ........................................ 121.7 STAGES OF EIA ..................................................... 121.8 MAIN TECHNOLOGY AND METHODS ADOPTED IN EIA ............................ 131.9 BRIEF INTRODUCTION TO THE INSTITUTION CONDUCTING THE EIA ... 13

2 PROJECT DESCRIPTION ..................................................... 15

2.1 BASIC CHARACTERS OF THE PROJECT ................................. 152.2 COMPONENTS OF THE PROJECT ..................................................... 16

2.2.1 Discharge Networks anid Pumping Stations ................................... 162.2.2 WWTP Engineering ..................................................... 26

2.3 SEWAGE TREATMENT PROCESS ....................................... 422.4 SEWAGE VOLUME AND CONSTRUCTION CAPACITY . . 47

2.4.1 Current Sewage Discharge ..................................................... 472.4.2 Forecast on Designed Sewage Volume .......................................... 482.4.3 Designed scale of the treatment plantError! Bookmark not defined.

2.5 SEWAGE DISPOSAL GRADE ..................................................... 512.5.1 Sewage quality ..................................................... 512.5.2 Design Sewage Quality ............................... ...................... 682.5.3 Degree of Treatment ........................................... 68

2.6 PROJECT MANAGEMENT AND IMPLEMENTATION PLAN . . 682.6.1 Principle and Procedures for Implementation ............... ................ 692.6.2 Project Construction Management Institution ............................... 69

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2.6.3 Project Operation Management .................................................... 70

2.6.4 Schedule of Project implementation .............................................. 71

2.7 PROJECT CONSTRUCTION MANAGEMENT . ............................................. 74

2.7.1 Construction Period ................... ................................. 74

2.7.2 Construction machines .................................................... 74

2.7.3 Main Earthworks ................ .................................... 74

2.8 POLLUTION SOURCES ANALYSIS OF THE PROJECT . . 74

2.8.1 Pollution Source Analysis in the Operation Stage ............ ............. 74

2.8.2 The analysis of the pollution sources during the operation period 77

3 SURVEY OF THE ENVIRONMENT ................................................... 78

3.1 NATURAL ENVIRONMENT .......................................... 78

3.1.1 Geographical Position ........................ ............................ 79

3.1.2 Topography and Physiognomy .................................................... 79

3.1.3 Meteorology .................................................... 81

3.1.4 Ground water .................................................... 81

3.1.5 River System .................................................... 82

3.2 SURVEY OF ENVIRONMENT ......................................... 843.3 SOCIAL ENVIRONMENT ............................................ 85

3.3.1 Introductiont to the city ........................ ............................ 85

3.3.2 Territorial division and population ............................................... 86

3.3.3 Industry .................................................... 86

3.3.4 Agriculture .................................................... 87

3.3.5 Infi-astructure .................................................... 87

3.3.6 Public utilities .................................................... 89

3.4 LIVING STANDARD .................................................... 90

3.5 CURRENT ENVIRONMENTAL STATUS .................................. 91

3.5.1 Water environment status ...................................... .............. 91

3.5.2 Ambient Air .................................................... 141

3.5.3 Acoustic Environment .................................................... 144

3.6 ECOLOGICAL ENVIRONMENT ...................................... 145

3.7 CURRENT STATUS SURVEY ON INDUSTRIAL POLLUTION SOURCES

AROUND .................................................... 146

4 ANTICIPATIVE ENVIRONMENT IMPACTS AND PREVENTIONAND ABATEMENT MEASURES .152

4.1 ENVIRONMENTAL IMPACTS PROJECTION AND PREVENTION AND

ABATEMENT MEASURES FOR SURFACE WATER ................................................ 152

4.1.1 The Environment impact of surface water in the construction stage

.............................................................................. 152

4.1.2 The projection of the environmental impact on surface water in

operation stage and measures for prevention and abatement 153

4.2 IMPACT ON AMBIENT AIR PROJECTION AND PREVENTION AND ABATEMENT

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MEASURES.~~~~~~~~~~~~~~~~~~1 77M EA SU RES ............................................................................... 1774.2.1 . Impact on ambient air and prevention and abatement measures inthe construction stage ...................................................... 1774.2.2 Ambient Air Environmental Impact and Measures for Preventionand Abatement in the Stage of Operation ................................................ 178

4.3 ACOUSTIC ENVIRONMENTAL IMPACT PROJECTION AND MEASURES FOR

PREVENTION AND ABATEMENT ...................................................... 184

4.3.1 Acoustic environmental impact and mitigation measures ............ 1844.3.2 The impacts on acoustic environment and mitigation measures .. 186

4.4 SOLID WASTES ENVIRONMENTAL IMPACT ANALYSIS AND MITIGATION

MEASURES ...................................................... 1894.4.1 . Solid wastes environment in the construction stage and mitigationimeasures ...................................................... 1894.4.2 . Solid wastes impact in the operation stage and mitigationmeasures ...................................................... 190

4.5 IMPACTS ON SOCIAL ENVIRONMENT ANALYSIS AND MITIGATION

MEASURES ...................................................... 1924.5.1 Social environment impacts in the construction stage and mitigationmeasures ...................................................... 1924.5.2 Social Environmental impact in the operation stage ................... 199

4.6 ECOLOGICAL ENVIRONMENTAL IMPACT ANALYSIS AND MITIGATION

MEASURES ...................................................... 2004.6.1 Ecological environmental impact in the construction stage andm itigation m easures ...................................................... 2004.6.2 . Ecological environmental analysis in the operation stage andmitigation measures ............................................... 200

4.7 ANALYSIS OF ACCIDENTAL RISK .................................... 2014.7.1 Pumping unusable ...................................................... 2024.7.2 The Accidental discharge of the effluent of the WWTP ................ 2024.7.3 . Dehydrated sludge Centralized Landfill .................................... 2034.7.4 adding chlorine risk ...................................................... 195

5 ALTERNATIVE SCHEMIES .. ........ .. 204

5.1 SITE OF THE WWTP SELECTION ...................................................... 2045.2 SEWAGE TREATMENT PROCESS SCHEMES ........................................... 206

5.2.1 Brief description of the schemes .................................................. 2065.2.2 . Alternative Scheme ...................................................... 206

6 PUBLIC PARTICIPATION ...................................................... 209

6.1 OBJECTIVE AND METHOD ...................................................... 2106.1]. ssurvey objectiv ...................................................... 2016.1.2 survey priciple ...................................................... 2026.1.3survey methord ...................................................... 203

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6.1.4 survey organization ............................. 2046.2 THE FIRST PUBLIC PATICIPATION .. .......................... 211

6.2.1 survey content ............................. 2116.2.2 Survey result ............................. 211

6.3 THE SECOND PUBLIC PATICIPATION .......... .. ................ 211

6.3.1 Survey content ............................. 2116.3.2 Survey Results ............................. 212

6.3 FINAL SURVEY RESULTS .......................................... 211

7 ENVIRONMENTAL ECONOMIC BENEFIT AND LOSS ANALYSIS....................................................................................... ...........................217

7.1 ECONOMIC BENEFIT . 218

7.2 ENVIRONMENTAL BENEFIT ...................................................... 219

7.2.1 Cost Estimation of Main Environmental Protection Measures .... 219

7.2.2 . Environmental benefit and loss analysis .................................... 2197.3 SOCIALBENEFIT ...................................................... . 220

8 ENVIRONMENTAL MANAGEMENT AND ENVIRONMENTALMONITORING PLAN ........................................................ 222

8.1 ENVIRONMENTAL MONITORING PLAN ................................................. 222

8.1.1 Environmental Monitoring Plan for Surface Water ......... ............ 2238.1.2 Sludge Monitoring Plan .......................................................... 2238.1.3 Sewage water quality monitoring plan .................. ...................... 223

8.2 ENVIRONMENTAL MANAGEMENT ........................................................ 224

S. 2. 1 Institution and personnel .......................................................... 2248.2.2 The responsibility of the Division ................................................ 2248.2.3 . Implementation of environmental management and monitoringplan ....................................................... 2258.2.4 Setup Insulation Belt ........................... ........................... 2258.2.5 Setup navigation marks and anchor ban marks above bottompipeline and outfall ...................................................... 225

9 CONCLUSION AND SUGGESTION .227

9.1 CURRENT ENVIRONMENTAL STATUS CONCLUSION . .227

9.1.1 Ambient Air .2279.1.2 Surface Water Environment .2279.1.3 Acoustics Environment .2279.1.4 Ecological Environment .228

9.2 POLLUTION SOURCES OUTPUT . .228

9.2.1 Effluent Discharge of WP. .2289.2.2 Solid waste of WWTP .228

9.3 ENVIRONMENTAL IMPACT CONCLUSION . .228

9.3.1 Ambient Air .2299.3.2 Water Environment .229

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9.3.3 Acoustic Environment ..................................................... 2309.3.4 The solid waste ..................................................... 2309.3.5 Social Environment ..................................................... 231

9.4 CONCLUSION FOR POLLUTION PREVENTION AND ABATEMENT AND

MITIGATION MEASURES ..................................................... 231

9.4.1 Prevention and abatement measures for surface water pollution. 2319.4.2 Prevention and abatement for ambient air pollution ................... 2329.4.3 Prevention and abatement measures for acoustic environment .... 2329.4.4 Solid waste impact and prevention and abatement measure ........ 2339.4.5 Prevention and abatement measures for social environmentalim pact ..................................................... 2339.4.6 Ecological environmental pollution and prevention abatementmeasure ...................................................... 233

9.5 ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN ................. 234

9.5.1 Environmental monitoring plan ................................................... 2349.5.2 Environment Management ..................................................... 234

9.6 FINAL CONCLUSION ..................................................... 234

10 REFERENCE

11 APPEND FILES

1 Foreword

1.1 Background

Ningbo is one of the earliest coastal cities opening to the outside world approved by the

State Council. With economic growth and development of the urban construction, the urban

area has been expanded and population has been increased continually .The issue of water

quality deterioration of water bodies of inland rivers and Yong River has become more and

more serious due to discharges of industrial and domeatic sewage , and such condition has

endangered the surface water quality and marine water quality in shore. The existing

Jiangdongbeiqu WWTP only has a capacity of 100000m3/d, which is far from meeting the

demand of the city development. According to the Urban Master Planning, up to 2005, the

total volume of sewage in the central city will be 840000 tons, of which Sanjiangpian Area

has the sewage volume of 520000 t/d, and the sewage treatment ratio will be 40%. Therefore,

it is obvious very important to build new WWTPs and reconstruction of the sewage network

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in the urban areas.

For the purpose, the city government decided to build Ningbo Jiangdongnanqu WWTP

and Sewerage Project with loan of 26.127 million USD from the World Bank The total

investment of the project is 402.11 million RMB; except for the World Bank loan, the rest

part will be raised by the city government The sewage treatment capacity will reach to

160000m3/d after the project finished .The project will play a positive role for increasing

sewage treatment ratio, reducing pollutant load, improving the surface water environment

quality and investment environment of the city .

According to the "Environment Protection Law of PRC" and "Environmental

Management Rules for Construction Project", No. 253 Order issued by the State Council in

November 1998.and Check-list of Construction Project for Environment Classification

Management (First batch), the project is required to prepare EIA.

Based on "Notice on Strengthening Environmental Impact Assessment Work in

Construction Projects Financed by International Financial Organizations" No. (1993) 324

issued by SEPA, and World Bank Operational Directives: (OP4.01) Our academy was

entrusted by Ningbo Urban Infrastructure Development Office to prepare the report of

"Preliminary Feasibility Study Report on Environment Impact of Ningbo Jiangdongnanqu

WWTP and Sewerage Project " and "Preliminary Assessment of the Environment Impact

for Ningbo Jiangdongnanqu WWTP and Sewerage Project " .The potential environment

impacts have been assessed on the above reports .The assements mainly focused on the

issues of the impact of discharges on water body functions, impact of foul smell of the

WWTP .sludge disposal and improvement of urban environment.

Based on this, we have prepared the report of the Environment Impact Assessment for

Ningbo Jiangdongnanqu WWTP and Sewerage Project for appraisal and examination by the

World Bank Mission and domestic superior Environmental Protection Departments.

1.2 Objectives of the EIA

The purpose of the assessment: (1) Clarify the current status of the environment quality

in the project construction area through survey and monitoring in the range of the assessment

area; (2) Obtain the information on sewage of the city and incoming sewage quality of the

WWTP through monitoring to the sewage quality of the city; (3) Determine the source

intensity of discharged pollutants of the WWTP through engineering analysis and then on the

basis of this to analyze and project the impacts of them on the ambient environment after the

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project start up so as to put forward prevention and abatement measures ;(4) A feasibility

study to be conducted from the environmental point of view on the issues of project site

selection ,sewage treatment capacity ,site of outfall and discharge types through above work

so as to provide basis for the project decision-making ,engineering design and environment

management.

1.3 Basis for the EIA

1, "Environmental Management Rules for Construction Project", No. 253 Order issued

by the State Council in November 1998;

2. " Technical Guideline for EIA" (HJ/T2.1-2.3- 1993)

3, Technical Guideline for EIA" HJIT2.1-2.3-93, T2.4-95.HJ/T2.4-1995

4, Technical Guideline for EIA" HJ/T19-1997;

5. "Master Plan for Urban Development of Ningbo"

6, "Environmental Function Zoning of Surface Waters in Ningbo Municipality " By

Ningbo Municipal Environment Protection Bureau ,Nov.,1992

7. "Implementation opinions on Environmental Management Rules for Construction

Project", No. 165 [1999] issued by Zhejiang Provincial Environment Protection Bureau in

May, 1999

8. " Issues on Environmental Management for Construction Projects" No.117 [88]

issued by SEPA

9. "Notice on Strengthening Environmental Impact Assessment Work in Construction

Projects Financed by International Financial Organizations" No. (1993) 324 issued by SEPA,

State Planning Commission, Chinese Ministry of Finance and People's Bank of China.

10. "World Bank Operational Directives:" (OP4.01)

11. "Preliminary Feasibility Study Repot for Ningbo Jiangdongnanqu WWTP and

Sewerage" by ENFI 2002.20

12. "Entrust Letter of EIA Work for Ningbo Jiangdongnanqu WWTP and Sewerage

project "issued by Ningbo Urban Infrastructure Development Office on 29/12/1999

1.4 Scope of the EIA9


The scope of surface water assessment ranges from Panshidu of Fenghua River to

Zhenhai estuary of Yong River with a total length of 45 km; scope of air assessment is within

the range of 500 m from the plant boundary; Noise assessment is with 200m from the plant

boundary and 50m from the sewage pumping stations .The scope of social survey includes the

sewerage and service area, mainly in Haisu district and south of Jiangdong district The key

area is I km surrounding of the WWTP.

1.5 Assessment Standards

Based on the regional environmental protection objectives, environment function zoning

and characters of engineering, the following assessment standards are adopted:

1.5.1 Environmental Quality Standard

(1) Ambient Air Quality Standard

According to air function zoning, Class II standard prescribed in " "Ambient Air

Quality Standard" GB3095-1996 is adopted in project area. "The Maximum Permissible

Concentrations for Pollutants in Ambient Air in the Residential District" is adopted for H 2S

and N3H. (See table 1-1 for details)

Table 1-1 Ambient Air Quality Standard (mg/m 3)

Class IIPollutants Per hour Daily Annual Basis

averagaverage average erag

SO2 0.50 0.15 0.06 Class II,NO 2 0.24 0.12 0.08 B0519TSP - 0.30 0.20 GB3095-1996H 2 S 0.01 TJ36-79 Air

standard inN3H 0.2 - - residential area

(2) Surface Water Quality Standard

Class III of " Surface Water Environmental Quality Standard " GB3838-2002 is

adopted for inland rivers and Fenghua River (Fanshidu-Tongpenpu section); Class IV of

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"Surface Water Environmental Quality Standard " GB3838-2002 is adopted for Fenghua

River (Tongpenpu-Sanjiangkou section ) and Yong River. See Table 1-2 for details:

Table 1-2 Surface Water Quality Standard Unit: mg/l ( except pH )

Item Class Ill ClassIVPermanent value 6 10

CODcr< 20 30DO> 5 3

BOD 5< 4 6PH 6.5 8.5

Ammonia nitrogen < 0.5 1.0Cr < 0.05 0.05Oil< 0.05 0.5

(3) Environmental Noise Standard

The Class 3 of "Urban District Environmental Standard" GB3096-93 is adopted in the

WWTP site i.e. equivalent sound level (LAeq), 65 dB on daytime, 55dB at nighttime. Class 4

standard is adopted in the north boundary nearby the expressway, i.e. 70 dB on daytime and

55 dB at nighttime .The sewage pumping stations are located at the banks of Yong River and

Fenghua River Separately, and Class IV standard is adopted in the areas.

1.5.2 Pollutants Emission Standards

(1) Waste Gas Emission Standard

Class 2 of "Malodor Pollutants Emission Standard" GB 145593 is adopted for the

WWTP (for newly built or expansion projects) See Table 1-3 for details:

Table 1-3 Malodor Pollutants Emission Standard

Control items Unit Class 2 (newly built3___________ _ or expansion)

Ammonia Mg/M3 1.5Sulfured hydrogen Mg/m 3 0.06

Concentration Dimensionless unit 20

(2) Standards for Influent Sewage and Effluent Discharges


" Quality of Sewage discharged into the Urban Sewers Standard" Cj 3082-1999 is

adopted for the influent sewage of the WVVWTP; "Integration Sewage Discharge Standard"

GB 8978-1996" is adopted for effluent after treatment .See Table 1-4 for details:

Table 1-4 Standards for Influent Sewage and Effluent Discharge

(unit: Mg/i)

Standard pH CODc BOD SS NH3-N Photsepha

CJ3082-1999 6.0-9.

GB8978-1996 6.0-9. 120 30 30 25 1.0C lass 2 0 _ _ _ _ _ I_ _ I__ _ _ _ _

The discharge of sludge of the WWTP will implement "Sewage and Sludge Discharge

Standard for Urban WWTP" CJ3025-93.

(3) Noise Control Standard

Construction Stage : "Noise Limit Value for Construction Site Boundary"

GB 12523-90 is adopted.

Operation Stage : Class III of "Noise Standard On Factory Boundary for Industrial

Enterprises" is adopted i.e. 65dB on the daytime and 55 dB at nighttime.

1.6 Environmental Protection Objectives

The project environment project objectives are shown in table 1-5:

Table 1-5 Environment Protection Objectives in Assessment Area

Protection Objectives Main characterLingjia Village About 100 householdsInland Rivers Class III

Ambient air quality Class II

Fenghua River Class IV

Environment Noise Class III

1.7 Stages of EIA

Construction stage: from the start construction to the operation of the project.

Operation stage: Sewage collected and treatment (2006-2010)

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1.8 Main technology and methods adopted in EIA

1) Matrix method is adopted for identify environment impact factors and

assessment factors filtration; the assessment factors will be determined

according to identification, filtration to various aspects such as the scope

of the affected area, affected extent and factors and etc.

2) The engineering information of the project will be used for Engineering

analysis;

3) The assessment of current status will use both the existing monitoring

results and monitoring results on site;

4) Mathematical models will be used for impact projection

1.9 Brief Introduction to the institution conducting the

EIA

The EIA has been prepared by Research & Design Academy of Environmental

Protection Science of Ningbo (It is also call NEAS for short) and it grew out

of Ningbo Industrial Scientific Research Institute, which was founded in 1958.

In 1987 it incorporated with Institute of Environmental Protection Science of

Ningbo and began to use the present name. NEAS is an integrated environment

protection scientific research institution covering the areas of EIA,

environmental engineering design, development of new technology and products

of environmental protection, project contract and supervision and analysis

testing.

It has considerable advanced scientific and testing equipment and computer

network. The main scientific research work on environmental field conducted by

the institution includes: EIA of construction projects, environment pollution

prevention and abatement engineering design, ISO 14000 consultation,

development and extension of environment protection technology, new materials

and equipment, environmental project contract and supervision, software

development on environment monitoring, EIA and etc. There is over 60 staff in

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the unit, of whom, professional technician's accounts for 90%; 56% of them have

senior titles .The specialty structure of the technicians is reasonable.

NESA has national first grade certification (No.2004) and it has the qualification for the

following business scope: surface water, ground water, marine water, gas. acoustics, solid

wastes. zoology, water and soil conservation, social economy, human health; light industry,

textile, chemical fibers, chemical engineering, petrochemical and pharmacy; machinery,

electronics; transportation; ocean and coast engineering; construction, public utilities and etc.

The middle and large scale projects carried out by the institution cover areas of chemical

industry, expressway, airport, seaport, bridge, railway, urban sewage treatment, garbage

landfill, sea-route integrated rehabilitation and etc., and there are many successful examples,

such as: Jiangdongbeiqu WVWTP, Yuyao Urban Domestic Garbage Landfill, Ningbo section

of Hangzhou-Ningbo Canal, 40000 tons shipbuilding project of Zhejiang Dockyard,

Xiangshan Link of Nation Coastal Line Highway Project, 50000ABS t/y project of Ningbo

LG Chemical Co. Ltd ,Second Phase Project of Ningbo Lishe Airport .Changhong Tunnel and

etc .

NESA has five national patents and it has been honored with the title of provincial

advanced unit for environment protection for many years and been awarded the name of

advanced scientific research unit of Ningbo .It is a municipal advanced unit named by the

municipal authorities.

14

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA

2 Project Description

2.1 Basic Characters of the Project

Name of the project: Ningbo Jiangdongnanqu WWTP & Sewerage Project

Character of the construction: Newly built

Project investment: The total investment is RMB 402.11 million (including RMB 38.08

million for preliminary land acquisition and resettlement cost), of which, construction cost is

RMB 283.84 million (RMB 135.92 million for WWTP and RMB 147.9 million for the

sewerage) and the other cost is RMB 118.28 million.

Source of fund: It is planned to use the World Bank loan of USD 26.13million converting

into RMB216.59 million .The rest fund will be raised from the construction capital of the city.

Construction content and capacity: It is planned to build Jiangdongnanqu WWTP and

sewerage which covers a land area of 11.32 hectares in the first phase of the project and the

proposed wastewater treatment capacity is 160000/d. The service range includes southwest

part of Sanjiangpian, Center district of Yin County, Ci Cheng Town, Dongqian Lake Town

and surrounding area of Dongqian Lake .The treatment standard is secondary and A/O

dephosphorization process is to be adopted. Tail water after treatment is discharged into

Fenghua River. While carrying out the construction in Phase I of the project, more spaces

shall be reserved for expanding the capacity to 400000m3/d in the Phase II of the project.

The sewerage includes construction of some 43.22 km of new trunk including two river

crossings with total length of 0.6km. New sewers will constructed in the following locations:

South Jiangdongnan Road, Jichang Road, Xingning Road, Baiyun Road ,Huanchengnan Road,

Yinfeng Road and Huanchengnan Road, rehabilitation of part of the existing combined trunk

sewers network. With the renovation of the sewer network ,three sewage lift pumping stations

will be renovated, i.e. Ningzhong Sewage pumping station and Wudongzha pumping station

and Huanzhengnan Road Sewage Pumping Station, The sewage networks construction of the

center district of Yin County, Ci Cheng Town, Tongqian Lake and surrounding area is shown

on the FSRs of each subproject.

Construction location: The project is located at southern part of Jiangdong District of

Ningbo on the south side of Hangzhou-Ningbo Expressway and east side of Fenghuan River.

15


See geographical position drawing for details,

Personnel: The fixed number of persons for the WWTP is 70 and 140 for sewerage

outside the plant.

Discharge outlet: The treated effluent will be discharged into the Fenghua River. The

control objective of the water body is Class IV.

Raw water quality : BOD5: 120mg/L, CODcr:240mg/L, SS: l50mg/L, NH3-N:30mg/L,

TP:4mg/L0

Treated effluent : BOD5< 30mg/L, CODcr:< 120mg/L, SS< 30mg/L, NH3 -N<

2.5mg/L, TP< 1.Omg/L.

Sludge outlet: The treated sludge can be transported to landfill site for disposal.

2.2 Components of the Project

2.2.1 Discharge Networks and Pumping Stations

2.2.1.1 Service scope

The service scope of Jiangdongnan District Sewage Treatment Plant consists of six water

discharge systems. i.e. Ningzhongpian subsystem, Wudongzhapian subsystem,

Huanchengnanlu subsystem, Xiwaihuan Road subsystem, Yin County central area subsystem,

Cichen, town subsystem.

The service scope of Ningzhongpian subsystem covers about 2.72km2 along Jiefang

Road; about 1.88km2 along Changchunl Road and Lingqiao Road, with water catchment area

of about 4.61km2 and service population of 53000.

The service scope of Wudongzha area subsystem covers the west of Caihongnan Road,

east of Fenghua River, west of Zhongxing Road, south of Zhongshandong Road and north of

Xingning Road, with water catchment area of about 5.6km2, and service population of 71000.

Service scope of Xiwaihuan Road subsystem covers 8.1km2 along Xiwaihuan Road,

7.8km2 along Huanchengxi Road and 2.6km 2 along Yinfeng Road, with total water

catchment area of about 18.5km2. In addition, a branch sewer pipeline, which carries sewage

16


with volume 100OOm 3 /d from Cicheng Town, links into main at north Xiwaihuan Road,

Service scope of Huanchengnan Road subsystem covers east of Fenghua River, west of

Dongwaihuan Road, along Huanchengnan Road, including 1.79km2 along Jinagdong Road

and 4.9 1km2 along Huanchengnan Road, with water catchment area of about 6.72km2 and

service population of 67000.

Service scope of Yin County central area subsystem covers Zhongguanmiao Town,

Shiqianz Town and XiayingTown , with water catchment area of about 30km2 .

Service scopes of Cicheng town and Dongqianhu town are detailed in each sub-project

FSRs.

2.2.1.2 schemes of sewerage Building network

The objective of sewerage network transformation engineering is:

(I)To transform the current discharging status of urban sewerage

Since there is no WWPT in the area of jingdongnanqu, sewage of the old urban area

either discharge directly into the nearby area of rivers or concentrate into pump station, then

fluent into Fenghua River by lifted pump. For exemple, Now, Ningzhong Pump Station is a

combined branch pump station where sewage discharge into the inner river by lifted pump;

Wudongzha Pump Station is a sewage pump station where sewerage discharg into rivers by

lifted pump. The sewage pump station of Huanchengnan Road is built in a new area where

both rain and sewage discharge network fully developed. Howerer, the water has been

contaminated seriously by those sewage discharged at random whice cause the water quality

of Ningbo Three-river area can not reach the standards. By the time the engineering is

built ,the sewage in the area of Jiangdongnan Road should fluent orgnizedly into waste water

treatment plant and discharge into Fenghua River after being treated. The health and invest

environment of NingBo should be improved greatly.

(2) To build the separate system

To match the implement of the road transformation and newly building sewerage

network, the separate system of sewerage network should be achieved basicly. The

engineering implement such as Jiefang Road, Zhongshan Rode, Renmin Road and Baizhang

17


Road achieve the goal of the separate system of sewerage network. Howerer, sewage

combined rain systems are general in the old urban area because those engineerings can not be

finished at once. the separate system of sewerage network should be achieved in the old urban

area, especially the main trunk with the implement of the transformation of the network.

The objective of this phase engineering is to improve the city discharge network into

which both the residence and industrial sewage fluent in this functional area and ensure the

WWTP proper working. achieve the separate system of sewerage network successfully to

portect ecological environment.

This phrase engineering schemes of the sewerage network transformation and the main

trunk is made according to "Master Plan for Urban Development of Ningbo" , combined

with the location of WWPT and the characters of the current sewerage network stutas. The the

main trunk sewerage network should be transformed firstly, then the branch trunk by which

sewage dischage into the new main trunk so as to gather as much as sewage into the plant;

Transform the Ningzhong Pump Station andWudongzha Pump Statio and build the new pump

station of Wangchun and Choubi; The main trunk should be built near pump stations to lower

the head of pumps, the consumption quantity of electrity and the lenth of discharge pipes.

According to above principle, the main trunk should be designed at Jiangdongnan Road

to gether sewage nearby this area and of the five pump stations. Transform the main trunk of

the old urban area and increase the secondary sewage trunk in the newly building area such as

Xiwaihua Road, Yinfeng Road, Huanchengnan Road and Baiyun Road. Since the new urban

area of Xiwaihuan Road and Huanchengnan Road develop fastly, some exeed field should

be left when building the main trunks of Xiwaihuan Road, Huanchengnan Road and the

Choubi Pump Station near Huanchengnan Road.

2.2.1.3 Sewerage Network Engineering

1. Layout of Trunk Sewer

The pipe network construction consists of two parts, one is the renovation of combined

sewer and the other one is lying of new trunk sewer. The renovation for combined sewer

covers Lingqiao Road trunk sewer, all branch-trunk sewers within Ningzhong and

Wudongzha areas The section to be newly built covers river-crossing sewer for Ningzhong

combined sewage pump station, east trunk sewer of Xingninglu, Jiangdongnan Road trunk

18

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAsewer, Xiwaihuan Road trunk sewer, Baiyunlu sub-trunk sewer, Yinfenglu trunk sewer,

Huanchengnanlu trunk sewer, river-crossing sewer of Huanchengnanlu sewage pump station

and main sewer to the sewage treatment plant.

Pipe network in Yin County central area is not included in this project scope, and design

for that part has been completed and implementation of the design is being carried out.

Pipe networks in Cicheng town and Dongqian Lake town is shown in their sub-item

project reports.

Trunk sewer for pipe network renovation is shown in Table 2-1

Table 2-lTrunk Sewer for new construction

DiameterNo. Sewer Start - end Length (m)

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _(m m )

Zhenming Road - Jiefangnan 350 800

1 Changchunl Road

u Road Jiefangnan Road - Ningzhong 80 l00

pump station

PipelineNingzhong pump station -

2 crossing 170x2 700. ~~~Jiangdongnanlu

river

Xinhe Road - Wudongzha 534 700

pump station

Wudongzha pump station - 485 1400

Fenghua River railway bridge

Fenghua River railway bridge - 701 lS00

3 Jiangdongna Qiwen Road

n Road Qiwen Road - plan 6666 1600

Nanwaihuan Road

Plan Nanwaihuan Road - 5520575 2200

Highway

Highway - Sewage treatment 1194 2200

station

19


East of Fenghua River Rive - 848 500

4 Qiwen Road Jiangdongnan Road

Plan road - Jiangdongnan Road 905 1100

Chenxiang - Yinjiang Road 204 400

Yinjiang Road -453 500

Chenglangnan Road

Chenglangnan Road - 314 600

Yinfeng Yongchunxiang

5 Road Yongchunxiang - Qiwen 1143 800

Village

Duantang Station - Duantang 187 300

town

Duantang town - Shundelu 223 400

Shundelu - Qiwen Village 456 500

Yaojiang south bank - 780 1000

Huangchengbei Road

Huangchengbei Road - Tongtu 641 120

Road

Tongtu Road - WangchunXiwaihuan 868 1200

6 RoadRoad

Wangchun Road - Lantian 859 1500

Road

Lantian Road - Lianfeng Road 519 1500

Lianfeng Road - NanwaihuanRoad ~~1762 1500Road

7 Wangchun Current section 631 600

Road Wangchun Road 591 600

Lanti an8 Roan Current section 795 300

Road

9 Nanwaihuan Xiwaihuan Road - Baiyun Road 659 1800

Road Baiyun Road - Huangchengxi 882 2000

Road

20

Ningbo Jiangdongnanqu WVTP and Sewerage Project EIA

Huangchengnan Road sewage

pump station - Jiangdongnan 756 2000

Road

Plan Nanwaihuan Road - west599 500

section of Jiangdongnan Road

Nanwaihuan Dongwaihuan Road - Qioubi 1831 900

Road pump station

Qioubi pump station - 3350 1000

Jiangdongnan Road

Pipeline Huangchengnan Road sewage10 crossing . . 260 1600

river pump station - Jiangdong

South bank of Xitanghe - plan 163 300

Xiao Road

plan Xiaolu - Lantianlu Road 422 400

Lantian Road - Lianfeng Road 398 400

Baiyun Lianfeng Road - Zuguanshan 547 400

Road Road

Zuguanshan Road - Qixiang 193 300

Road

Qixianglu - Qiwenlu 353 300

Qiwenlu - Nanwaihuan Road 702 400

2 Summary of the construction for main trunk sewer in current phrase

(1) Trunk sewer in Xiwaihuan Road

Xiwaihuan Road is a main road in Ningbo, which lies in west of the city, crossing north

to south. Trunk sewer will be laid in the green belt of west Xiwaihuan Road, whose service

range covers within west to Baiyunlu, south, to Beiwaihuanlu, north to Hangzhou-Yong River

express highway, carrying domestic sewage and industrial sewage. Compressive main sewer

pipe with diameter 600mm of Citing Town and sewer pipe with diameter 1000mm of

Zhongshanxilu link into this trunk, then it connects general trunk sewer of Nanwaihaunlu.

Trunk sewer in Xiwaihuan Road is 6980m long in total, collecting sewage area of

21


1348ha and sewage from Cicheng Town with flux of 134.1L/s. the diameter of trunk sewer

pipe varies from DNIOOO to DN1600. The designed maximum flux is 1509L/s, with a slope

varying 0.0006-0.0008.

This trunk sewer will be constructed by excavation method in the section of north

Huanchengbeilu, the section from Zhongshanlu to Nanwaihuan Road, with designed burying

depth of 3.15-3.97m. The soil texture in these sections is good, without influence from

ground water. The foundation of pipe adopt cushion with grouted rubble and pipe base with

concrete, and the groove can be supported with steel-plate pile according to sand quality. The

design depth for section from Huanchengbeilu to Zhongshanlu is 4.17-5.53m, which is so

deep that leading to much influence by ground water, and the push-pipe construction method

is suggested.

(2) Trunk sewer in Baiyunlu

Baiyunlu is an urban minor road from Xiwaihuan Road to Huanchengxilu, crossing north

to south. Trunk sewer will be laid under carriageway of west road, whose service range

covers within south to Zhongshanlu, north to Qiyunlu and west to Huanchengxilu, carrying

domestic sewage and industrial sewage and it connects general trunk sewer of Nanwaihaunlu.

Trunk sewer in Baiyunlu is 3703m long in total, collecting sewage area of 223.5ha. The

diameter of trunk sewer pipe varies from DN300 to DN400. The designed maximum flux is

70L/s, with a slope varying 0.002>0.003.

This trunk sewer will be constructed by excavation method due to its good soil quality

and low designed depth of 2-4.5m. The foundation of pipe adopts cushion with grouted

rubble and pipe base with concrete, and two measures can be taken if part section are affected

by ground water: firstly proceed foundation treatment, grouting with 30cm slice and 10cm

gravel; secondly support the groove with sparse or dense steel-plate pile according to sand

quality. Roadbed below 50cm deep should be backfilled with 2:8 lime soil due to the sewer

bury under the road surface.

(3) Trunk sewer in Yinfenglu

Yinfenglu is an urban minor road right near western bank of Fenghua River, crossing

north to south. Trunk sewer will be laid under road surface, whose service range covers

22

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAwithin south to Changchunlu, north to express highway and 400m west to Fenghua River,

carrying domestic sewage and industrial sewage and it connects general trunk sewer of

Nanwaihaunlu.

Trunk sewer in Yinfenglu is 2980m long in total, collecting sewage area of 135ha. The

diameter of trunk sewer pipe varies from DN300 to DN800. The designed maximum flux is

190L/s, with a slope varying 0.00 1-0.003.

This trunk sewer will be constructed by excavation method due to the good quality of the

construction site and low designed depth of 2-4.5m. The foundation of pipe adopts cushion

with grouted rubble and pipe base with concrete, and two measures can be taken if part

section are affected by ground water: firstly proceed foundation treatment, grouting with

30cm slice and 10cm gravel; secondly support the groove with sparse or dense steel-plate pile

according to sand quality. Roadbed below 50cm deep should be backfilled with 2:8 lime soil

due to the sewer buried under the road surface.

4) Trunk sewer in Jiangdongnan Road

Jiangdongnan Road is an urban minor road right near eastern bank of Fenghua River,

crossing north to south. Trunk sewer will be laid under road surface, whose service range

covers within south to Dahelu, north to express highway and 500m east to Fenghua River,


Nanwaihaunlu, with finally transporting to Jiangdongnanqu WWTP.

Trunk sewer in Jiangdongnan Road is 5511m long in total, collecting sewage area of

about 3600ha. The diameter of trunk sewer pipe varies from DN500 to DN2200. The

designed maximum flux is 4301Lls, with a slope varying 0.0006-0.0016.

The section of trunk sewer with diameter varying from DN1100 to DN2200 will be

constructed by push-pipe construction method due to its deep designed depth of 3-7m, with

its much influence by ground water. The other sections of trunk sewer will be constructed by

excavation method due to the good quality of the soil in the section and low designed depth of

2-4m. The foundation of pipe adopts cushion with grouted rubble and pipe base with concrete,

and two measures can be taken if part section are affected by ground water: firstly proceed

foundation treatment, grouting with 30cm slice and 10cm gravel; secondly support the groove

23


with sparse or dense steel-plate pile according to sand quality. Roadbed below 50cm deep

should be backfilled with 2:8 soil-lime due to the pipes burying just under the road surface.

(5) General trunk sewer in Nanwaihuan Road

Jiangdongnan Road is an urban major road of south Ningbo city, crossing from east to

west. Trunk sewer will be laid under the green belt, whose service range covers within

Xiwaihuan Road, Baiyunlu, Yinfenglu, Jiangdongnan Road and Huanchengxilu (constructed),


Jiangdongnan Road, with finally transporting to Jiangdongnan District sewage treatment

plant.

General trunk sewer in Nanwaihuan Road is 3164m long in total, catchment area of

2525ha. The diameter of trunk sewer pipe varies from DN1800 to DN2200. The designed

maximum flux is 3000L/s, with a slope varying 0.0006-0.0009. It will be constructed by

push-pipe construction method due to its deep designed depth of 7.5-8.5m, with its much

influence by ground water.

2.2.1.4 Renovation and Construction of Sewage Pumping Stations

The renovation for sewage pump stations in this design covers rebuilding of Ningzhong

combined pump station; Wudongzha sewage pump station and new construction of

Wangchun pump station and Qioubi pump station. At present, the existing pump stations

undertake pumping sewage and rainwater for Ningzhongpian subsystem, Wudongzhapian

subsystem and Huanchengnanlu subsystem.

(1) Ningzhong sewage pump station (capacity: Q=520L/s, H=6m)

Ningzhong sewage pump station is a conmbined sewage pump station . The service area

of it includes Jiefangbei Road, Jiefangnan Road ,Lingqiao Road, Changchun Road . It has six

24

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIApumps at present ,with designed capacity of 55001/s ,the influent pipeis DN 2000mm and the

absolute hight of pipe bottom is 1.Om. The sewage will be lifted by the pumps to dicharge into

Fenghua River .After the nonovation the main trunks in Jiefang Road , Lingqiao Road and

Changchun Road will be separation drainage system , part of the branches will still be

conbined pipes which will be connected with the trunk sewers .The disgined capacity after the

renovation will be 37000m3 /d. The engineering work: 13m X 7m X 15m(7m underground ,8m

above ground )pump house, 13 X 3m X 7m underground suction tank.

Vertical sewage pumps (Q=650m3/h,H=7m,N=22kW), 4 sets with 1 standby

Machine grids (B=2000mm,gap width 60mm) Iset , dregs 670kg/d.

(2)Wudongzha Pumping Station (capcity : Q=760L/s, H=7m)

The service area of Wudongzha sewage pumping station mainly covers along the

Xingninglu Road. There are 4 sewage pumps with design capacity of 5501/s; the diameter of

the inlet pipe is 1000mm. The absolute standard height of pipe bottom is - 0.80m.The

effluent is discharged into Fenhua River by lift pumps ;the design capacity after renovation of

the pumping station will be 3.3 m3/d. The engineering quantity: 13m X 7m X

15m(underground 7m, ground 8m) one pump house , 13m X 3m X 7m underground suction

tank .

Vertical sewage pumps (Q=950m3/h,H=7m,N=3OkW), 4 sets with 1 standby

Machine grids (B=2000mm,gap width 60mm) 1 , dregs lOlOkg/d

(3) Wangzhun Pumping Station (capacity: Q=1290L/s, H=8m)

The service range of the pump station covers Yinfenglu and Xiwaihuan Road and

sewage of Cicheng Town will cross the river through the lift pump station. There are 3 pumps

now and the design capacity is 930L/s.The pumping water will be discharged into the

Fenghua River .The design capacity after renovation will be 37000 m3 /d,.engineering work

13m X 7m X 15m(underground 7m, aboveground 8m) pump house ;13m X 3m X 7m

underground suction tank .

Vertical pumps (Q=950m3 /h,H=8m,N=37kW), 6 sets with 1 standby.Three sets will be

fixed recently with one standby. .machine grids (B=2000mm,gap width 60mm) 1 set, dregs

1860kg/d. .

(4) Qiubi pumping station (Capacity : Q=480L/s, H=7m)

25


It is a sewage pumping station equipping with grids room, suck tank and pump house

which is half underground structure :diameter 13.5,with 7.Ounder ground and 4.5 above the

ground .The specifications of the main equipment:

vertical sewage pumps (Q=600m3/h,H=7m,N=22kW), 4 set with one standby .Two will

be installed recently with one standby .

Machine grids (B = 2000mm,gap width 60mm) 1 set , dregs ,590kg/d.

2.2.2 WWTP Engineering

2.2.2.1 Engineering Planning

Based on the Urban Master Planning Compendium of Ningbo City ,a WWTP with a total

capacity of 400000 m3/d will be built in the center district of Yinzhou, south of

Hanzhou-Ningbo expressway and east side of Fenghua River It covers a land area of 20.96 ha.

The capacity of P'hase I is 160000m3/d covering 11.32 ha. There are 6 subsystems for the

service sewer networks: Ningzhongpian subsystem (catchment area 4.6 km2 serving

population, 53000); subsystem of Wutongzhapian (catchment area 5.6km2 , serving

population 56000); subsystem of Huanzhengxilu (catchment area, 18.5km2) subsystem of

Huanchengnanlu (catchment area 6.7km 2 serving population 67000); subsystem of

Yinzhou District (catchment area, 30km); the rest is the subsystems of Cicheng and Dongqian

Lake.

2.2.2.2 General plane Layout

The general plane layout will observe the following principles: smooth technological

process. compact arrangement, short sewer, land saving, full greening and beautifying

environment.

According to the process, sewage, introduced from east of the plant area, flows into the

grid for removing grit, then pumped to thin grid and cyclone grit removal tank for removing

the grit and flows into the aeration tank. After that, it flows to the secondary sedimentation

tank, where the settled sludge flows to the return sludge pump house via the outer layer of the

26

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAdistribution well, then pumped back to the aeration tank. The remaining sludge flows to the

sludge storage tank and dewatering house for dewatering, the sludge cake thus produced is

trucked to the disposal site. The sterilized water in the secondary sedimentation tank flows

westward to Fenghua River.

The blower house is located between the two aeration tanks so as to shorten air pipeline

and reduce air pressure loss. Its location is given consideration to Phase II project.

The return sludge pump house is arranged between the aeration tank and the secondary

sedimentation tank so as to make the return sludge flow short distance. The sludge-dewatering

house is located at side of transport road, thus is easier to transport the sludge out of the plant.

Storage yard is located beside the grid chamber, cyclone grit removing tank and

dewatering house for easy stockpiling, truck loading and transport of waste, grit and sludge.

The substation is arranged near the load center with easy incoming of cable considered.

The repair shop, warehouse, shed and sludge transport equipment depot is arranged

alternatively in the east of the plant area so as to make full use of the site within the enclosing

wall. The repair shop covers machinery repair and electrical equipment repair, etc.

The administrative area of the plant includes complex building, garage, and bicycle shed

and janitor' s room. The complex building covers office, chemical analysis lab, bachelor

quarters dining room, bathroom, central control room and instrument repair, and four stories

in all. The square and parking lot are provided in front of the complex building and a small

garden is located in the south of the complex building.

It is fully greened in the plant area to beautify the environment.

Space for its expansion is reserved in the south of the plant area.

The.general plane layout is shown in the drawings attached.

2.2.2.3 Process Design

See Table 2-3 for details of the construction structures.

Electricity Design

1. Power supply for the Plant

The power load for the sewage treatment plant is Class II. In the design, two circuits of

lOkV power supply are adopted (one working and the other for standby).

2. Power load calculation

27


The demand coefficient method is used to calculate the power loads. The calculated

effective power load of the whole sewage treatment plant Pjs=1754kW, the calculated

ineffective power load Qjs=57OkVar (after compensation) and the Calculated apparent power

load Sjs=1844kW. The power factor COSO=0.95 or above among which the calculated power

loads at the general transformer station (MCC2) are as follows:

Effective power: Pjs=1308kW

Ineffective power: Qjs=420kVar(after compensation)

Apparent power: Sj s= 1373kVA

The calculated load of the transformer substation (MCC2)

Effective power: Pjs=445kW

Ineffective power: Qjs=l4OkVar(after compensation)

Apparent power: Sjs=467kVA

3. Wiring for the plant

Single sectional bus line wiring is used in lOkV power. Two circuits of lOkV power are

adopted (one for working; the other for standby). Switch on the sectional bus line and the

power supply begins to operate. Single sectional bus line wiring is also used in 0.4kV power

with the transformers connected to the two corresponding sectional bus lines in lOkV power.

The transformers run separately, each as the standby for the other. The power supply and the

illumination supply share the transformers whose neutral point is directly grounding

4. Equipment selection and substation

The middle located hand-vehicle switch cabinet is used in IOkV. The type is KZN1-12

metal-armor enclosed switch cabinet. The VT2-12 vacuum circuit breaker is selected with the

rated current being 630A and the rated turnoff current 31.5kA.

MNS type low voltage drawer switch cabinet is used in 0.4kV. Capacitance automatic

compensation cabinet is adopted for the low voltage capacitor and paralleled with the low

voltage switch cabinet. The transformer is SC9 type dried energy-saving transformer. Large

28

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIApower consumers in the sewage treatment plant are the inlet water pump house and the air

blower house, so to reduce the low-voltage line loss and the low-voltage bus line voltage

fluctuation induced by large power electromotor start-up, the 10kV power should be deep in

the load center. Therefore in the machinery maintenance room near the inlet water pump

house a transformer station is built where 2xSC9, 400kVA, 10/0.4kV transformers and

low-voltage motor control center MCC1 are assembled. In the neighborhood of the air blower

house a general transformer station is built where a 10kV high-voltage cabinet, 2xSC9,

IOOOkVA, 10/0.4kV transformers and low-voltage motor control center MCC2 are installed.

Although the sludge returning houses and the sludge-dewatering house consume not too much

power, yet there are a number of motors. To achieve functional control, motor control centers

MCC3, MCC4 and MCC5 with the power supplied from the general transformer station, are

therefore built near the two sludge returning houses and the sludge dewatering house.

Due to the construction of the project by stages and the larger scale in stage II,

equipment in the transformer stations are only used for stage I. During stage II, another

general transformer station will be built from which power uses in stage I will switch to be

supplied.

5 Electric Energy Measurements

High demand and high measurement is used in this project. Two measuring cabinets are

on the two 10kV bus lines with a 0.2 rating CT and PT set for measurement. In the relay

closet of the cabinet, an effective power ammeter and an ineffective power ammeter are

installed .

6. Operating Power Sources

Spring energy storage direct current operation is used in 10kV switch cabinet and the

working power is 220V DC that comes from the direct current screen.

7. Reactive-current compensation

Capacitance automatic compensation cabinets are set up on the low voltage operating

voltage bus line at all of the transformer stations. The power factor after compensation is

COS0=0.95 or higher.

8. Secondary Wiring and Relay Protection

10kV switch cabinets, 10kV sectional circuit breakers and 10/0.4kV transformers are

controlled by the onsite switch cabinets. And light monitors the secondary circuit.

29


9. Relay protection devices:

Delayed fast breaking protection and over-current protection is adopted in 10kV circuit.

Fast breaking current, over-current and single phase grounding protection on the low voltage

side are employed in 10/0.4kV transformers. All relay protections are monitored and

controlled by computers.

10. Over-voltage Protections and Grounding

To protect the 10kV equipment from the attack of over-voltage traveling wave in the

atmosphere of trolly wire, zinc oxide lightning arresters are installed on the inlet wires of the

transformers and on the 10kV bus lines.

Ring shaped grounding is used at 10/0.4kV transformer stations. The grounding

resistance is R< 4ohm and forms a developed network throughout the plant.

11. Electromotor Starting Methods

Electromotor of the inlet water pumps (110kW) and that of the air blower pumps

(315kW) are started indirectly, while the others are all started directly.

12. Electromotor Control Methods

Key technical devices driving electromotor uses onsite control, MCC control and PLC

control, i.e., triple control. The onsite control box is set beside the motors. The on/off buttons,

running, stopping and failure indicators, and jerk buttons are all just on the control box panel.

There are onsite MCC-PLC control switches, on/off buttons, indicators and amperemeters on

the MCC.

13. Illumination and overhaul Network

280/220V triple-phase four-wire system is used in illumination and repair. The inside

illumination source uses golden halogen lights and fluorescent lights. The roadway

illumination in plant area uses photoelectric ally controlled high-pressure sodium lamps as

light sources. In the especially humid area illumination source uses 36V or 12V.

30


14. Cable Wiring

Cable trenches and trays are used for cable wiring within the building while cable

trenches, burying and trays are used in the plant area. The buried cables are metal armored;

meanwhile those in the cable trenches and trays are not armored. The electric cable types are

VV22-1 and VV-1 whereas the control cable type is KVV22KVV.

31


Table 2-3 The Main Structures and Equipment of the WWTP

Name of Am Designstructure oun water Main Equipment Design parameters

struture t flow

Water trap Plane size5m X 3mWater inlet 2 Unit width 1.8m

ditchCoarse grid 2 tightwire type grit removers, 1 screw Grit remover clearance 20mm, a=70° , length

chamber conveyer of convyer5m, capacity 2m3/h

Inlet pump 1 208000m 3 6 submerged pumps (4 working 2 Q=0.603m3 /s, H=13m, N=llOkW, ri =82%,house /d standby) 985rpm

Effective width of barl800mm, gap width

Fine grid 3 Cuneiform screw grid machines 6mm, obliquity 350, water depth 1.02 m.with axis-free screw conveyer axis-free screw conveyer length 8m, capacity

2m1/h.

Cyclone 2 104000n ce sprtrM30m,L7sedimentati 2 /d 2 Scre separator ¢ 300mm, L=7m Dia 5.8m H 5.44m

on tank

aeration 2 104000m3 spec: 79m X 75.5m X 6m, anaerobic retaining

tank /d time 1.7h, aerobic retaining time 6.7h

Secondary 2 m3/ A 2 Waterpower retaining time 3.7h, tank Dia 45msedimentati 4 Waterpower load value 1.26m3/m2 *h wt ldermvrwt eta rv

on tank with sludge remover with central driveChlorinatio Chlorination is adopted, volume adding 4.5t

32


n roomSludge 4 Returning pumps 2 screw sludge

pump house pumps (loperaton 1 standby)Blower 4 single-stage high speed centrifugal Air volume Q=12000m 3/h, press 0.73bar,house blower (3 working 1 standby) N=315kW.

1 sludge storage tank with effectiveSludge volume V=115.6m 3 , 2 centrifugal

dewatering dewatering machines , unit capacityhouse 80 m 3/h, 1 flocculants adding device

33


2.2.2.4 Automatic Control Design

1) Design requirements of the project

To ensure the safety, reliability and constant production of the sewage treatment process

in the plant and improve the automatic control level, Adopted control system along with the

monitoring and data collecting system (SCADA) is the fruitful programmable logic

controller-based (PLC) collecting-scattering type control system that has been widely used in

both domestic and foreign sewage treatment plants. The characteristic of the

collecting-scattering type control system is the separation of the management from the control.

The managing part is mainly to monitor the production process of the whole plant while the

control part is to achieve the automatic control over the specific precincts through the on site

PLC. The SCADA system, through the on site checking devices and network devices to

monitor the main technical process and collect related data of the technical parameters during

the production (for the computer controlled system, see the attached figure).

All of the checking and measure devices are online. The transmitters all have digital

display devices installed and are programmable. The PLC transfers standard analog and

digital signals.

Considering some administration departments of the sewage treatment may visit the

system, communication interfaces with upward communication capacity is reserved. And

Space is also reserved for possible expansion of the production system.

(2) Composition and function of the control system

The control system of the sewage treatment in the plane is composed of

Class I-on site control (on site electric control gear)

Class II-process control (specific PLC control substation)

Class III-monitor management (operation station and engineer station of the central

control room)

34


Central control room

a. Introduction

A central control room is built in the complex building located in the front of the plant. It

is in charge of the monitoring the variations of the technical parameters during sewage

treatment, status of the working devices and operation management.

Three computers are equipped in the central control room, one of which is for the

engineers' use (engineers' station). Through it, the whole system can be developed,

parameters and states changed. The other two computers are for the operators (operation

station). Via multiple interfaces, they monitor the real-time variation of the technical

parameters, operation and breakdown of the devices and print the everyday reports, accidents

and data records. The monitor systems of the two operators are redundant for each other.

There are many menus in the computer monitor at the operation station, including

schedules of the constructions, menu of the all kinds of technical parameters, trend lines of the

technical parameters, menu of failures and the devices operation conditions etc. Through

these, the operators can fully learn the each part of the treatment process and the occurrences

at each stage in time.

Three printers can print all the needed materials at any time and the daily reports, week

reports and monthly reports.

To convenience administrators learn the operating status of the devices in the whole

plant, a mimic panel is installed in the central control room that displays the operating status,

failure status and variation parameters of the devices at pump stations both throughout the

plant and outside. The panel is controlled by a specific PLC.

Due to the large size of the plant, to make the everyday management, monitoring and

technical analysis flexible, multi-medium which include large-screened projectors and audio

devices will be installed in the central control room. They can project the menus of CRT at

the operation station to the screens, which in combination with the flow chart of the mimic

panel, reflects the real time data and detailed pictures at each stage of the technical process.

35


Besides they also have the functions of sound prompt, alarming and help, which in

conjunction with the projectors can synchronize the sounds and pictures.

The mimic panel displays the full-scale status of technical process statically while the

projector displays the pictures of all the technical parameter dynamically.

b. Contents of the mimic panel:

Indication of the process parameters such as water level in the water-collecting basin of

the pump house, flux of the pipes and sums, solved oxygen volume in the aeration tank.

concentration and the effective power etc.

Status of the devices and alarming indication including the running and failures of the

monitoring devices;

Detailed layout of the technical process of the sewage treatment system in and outside

the plant.

Date and time display.

2) Process control station

a. The first partial control station (PLC1)

It is located in the general transformer station, responsible for the collection, display and

control of the facilities' process parameters and devices status at the transformer stations,

incoming water pump house, sedimentation tanks, Parshall flumes, A/O aeration tanks,

blower house, sludge return house, secondary sedimentation tanks, and dephosphorizing and

drug-adding house. The control process includes control system of the grids in the incoming

water pump house, that of the sludge pump (including the frequency controlled), grit removal

devices systems of sedimentation tanks, the regulating system of the aeration volume at the

aerobic tank, the returned sludge ratio regulating system of sludge backwash pump, sludge

pump control system, and the control and air volume regulating system of the blower pump.

The signals to be checked include water level, sewage and sludge flux, concentration of the

sewage and sludge, solved oxygen, PH value, and electrical potential of oxidation-reduction,

blowing pressure, temperature and the status of the devices.

To use on site bus line to check instruments.

36


Independent computer management system is installed at the transformer stations.

b. The second partial control station (PLC2)

It is located in the sludge dewatering pump house with control object being the control

system of the dewatering machines. The signals to be checked are liquid level, flux, and

harmful gas and devices status.

3. Items for Measuring and control

Measurement of PH value of incoming and outgoing water

Temperature for incoming water;

Level indication in front and behind thick/thin grid and control for start and stop

(supplied by grid machine producer);

Water level indication for water incoming well and sludge well;

Level indication for sludge returning;

Sewage flow;

Blowing air flux measurement (two main air pipes and all branch pipes of the anaerobic

tank and aerobic tank);

Air pressure measurement at the main pipes

Air temperature measurement at the main pipes

Measurement of incoming water and concentration of solid/suspension in water from

secondary settling tank;

COD online measurement for incoming water and water from secondary settling tank;

TP online measurement for incoming water and water from secondary settling tank;

Measurement electric potential of oxidation-reduction in anaerobic tank;

Soluble oxygen measurement in water from aerobic section and automatic blowing air

volume control;

Measurement of sludge concentration in anaerobic section and automatic control for

sludge returning volume.

Measurement of electric parameters at the high voltage side and those at the MCC

37


incoming wires gear of the low voltage system.

For the details of the above items, see process checking and control flow chart.

4. Main Instrument Selection

Level indication: ultrasonic liquid level indicator;

Sewage flow: flow meter for open channel;

Sludge returning flow: flow meter for open channel;

Blowing air volume: Annular flow meter

Acidity : Industrial acidity gage;

Soluble oxygen in water : membrane type soluble oxygen indicator

Organic concentration: COD online indicator

P concentration: TP online indicator;

Sludge concentration (MLSS ) : Solid suspended substance concentration indicator

Sewage concentration (SS) : Solid suspended substance concentration indicator

Pressure : Intelligent pressure transmitter.

Temperature: body type temperature transmitter.

5 System power supply and cable lying

The power supply in the central control room is achieved by the general transformer

station' s supplying for the UPS and the UPS supplying for the FCS system. Power sources

at PLC substation is supplied by its corresponding distributing box, which is also supplied by

the UPS. The signal cables of the automatic control instruments in the plant area and the

communication cables between the main-sub stations are mainly laid by cable trenches or

buried directly. When they have to share the cable trenches with the electric wires, layered

lying is required. Those crossing roads or above the ground and those entering households

should be coated with apparent protective tubes.

2.2.2.5 Architectural and Structure Design

38

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA1. Architectural design

The civil works in the design are the constructions of Jiangdongnan sewage treatment

plant, Ningbo. A new complex building and a blower house (for details, see the table of

buildings and constructions) will be newly built.

Total building area: 8602m2

Total building volume: 39888m3

This plant will be built with a lot of individual civil works each with small volume, so

the attached buildings with similar nature and closely-linked function will be merged as far as

possible so as to reduce site area, enlarge greening area and facilitate management.

The complex building covers office, production management office, chemical analysis

lab, living quarters, dining room, dining hall, and central control room, which is easy for

management and constitutes a certain mass of building. Water for bathing and drinking will

be electrically heated, so no separate boiler house will be built.

As a municipal project, the buildings shall be designed in a simple and clear style.

2 Structure Design

(1) Engineering geology

According to data supplied by No. 2002-161 geotechnial site survey in June 2002, the

area to be built belongs to the marine plain. The topography of the site is very simple and the

ground is smooth. Elevation at the ground surface is 2.35-1.72m. The survey reveals that

foundation soil of the site within 40m below the surface belongs to the silty clayey soil,

clayey soil and silt at the Holocene epoch of the Quaternary Period. The building site can be

classified as Class IV.

The stable underground water level is 0.28-0.5m from the surface and the absolute

elevation is 1.84-1.7m, which belongs to the perched water. The underground water is

non-corrosive to the concrete and free of seismic foundation liquefaction.

39


(2) Earthquake-proof design

The basic seismic intensity in Ningbo area is in a magnitude of 6 according to documents

issued by relevant bureau and commission of the state and zoning map of seismic intensity in

China.

(3) Basis for structure design

Besides satisfying the strength and stiffness requirements of each construction, attention

should be paid to stability of structural anti-buoyancy resulting from the underground water

and corresponding measures should be taken. For the water storage constructions, control of

structure crack width, anti-seepage and antisepsis should be carefully handled.

(4) Construction style of main buildings (structures)

The structural style of various buildings is determined according to the technological

process. In the light of construction scale and importance of the buildings, different structural

styles, such as reinforced concrete frame, reinforced concrete bent fiame and brick-concrete

construction, etc. will be adopted. For foundations, it is planned to adopt pile foundation, raft

foundation, independent foundation and strip foundation. Ordinary cast-in-site reinforced

concrete (RC) will be used for water storage structures.

Consumption of Three Building Materials

Steel: 942t

Cement: 8479t

Wood: 1035m3

2.2.2.6 Roads and Transportation

The roads within the plant form a developed road network to satisfy the requirements of

fire protection and traffics. Due to the shorter side of the stage I site adjacent to the road in the

east, a passageway is arranged in the design. Another cargo passageway will be built during

40

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAthe expansion and the personnel and cargo passageways are arranged separately. Staff

members and workers enter the complex building for registering their attendance via

personnel passageway, then go through the complex building and get into the plant area.

The road in the plant is 6m wide and paved with 22cm-thick graded broken stone as base

course and 15cm-thick cement concrete as surface. Granulated cinder can be paved

underneath the base course, if necessary. The sidewalk is 2m wide and paved with 10cm-thick

graded broken stone as base course and 10cm-thick cement concrete as surface.

The turning radius at curb of road crossing is 9m.

The main substances for transportation includes grit, settled sludge and dewatered sludge

as well as a small amount of goods, 120t/d in total and 25km in transport distance. According

to the calculation, eight 4.5t self-dumping trucks are needed. All grit and sludge must be

transported out on the same day they are produced so as to avoid too much storage within the

plant. Twol.St forklift trucks will be used as loaders. The sludge transporting equipment

storage is provided inside the plant area.

In addition, a passenger bus will be selected for transporting staff members and workers

at commuter time. One light-duty bus and one car will be provided for dealing with office

affairs. Two 1.5t double-row seat pickups are provided for sewer maintenance and repair and

one St heavy-duty truck is provided for transporting fragmentary goods. A garage is provided

in the administrative area.

2.2.2.7 Greening of the Plant Area

A small garden will be built in the west of the front plant area, where a pavilion will be

constructed and even green trees will be planted. The small garden and the front plant area are

located beside the urban road, thus beautifying the streets.

The plant area shall be fully greened. Tall alee trees and dense bushes will be

alternatively planted along the enclosing wall, thus forming an enclosed green curtain so as to

reduce adverse effect on the facilities around. A garden type plant will be built by utilizing

41


abundant irrigation water source of the plant so as to beautify the environment and purify the

air.

Main Tech-economic Indexes

Total site area: 20.96ha

Site area used during stage I: 11.32ha

Site area occupied by the buildings and structures for stage I: 2.38ha

Floor area during stages 1: 8977 m2

Building coverage of stages I: 21.02%

Plot ratio of stages I: 0.079

Greening area of stages I: 3.96ha

Percentage of green land of stages I: 34.90%

For details see the layout of the plant

2.3 Sewage treatment process

The objects treated in the WWTP include domestic and industrial wastewater, which

belong to organic wastewater.

A/O process with dephosphorization by biological method is recommended and

biological nitrification process is used to remove NH3 -N and N, and assistant chemical

method is used for dephosphorization at the sludge dewatering liquid or the secondary

sedimentation tank so as to prevent P from entering the sewage treatment system again.

In combination with the efficiency-improving chemical methods for dephosphorization,

biological treatments of aerobic organic degradation (0), aerobic nitrified denitrogenation (0),

anaerobic dilution (A), and aerobic absorption dephosphorization (0) shall be adopted for

sewage treatment and disposal process.

In the sludge treatment process, dewatering machines are used to decrease the water

content to 75% or below for transportation and burial.

A/0 process

The recommended project in this item is A/0 process removed phosphorous by

using biological method. And removes ammonia nitrogen by biological nitration.

42


Its supernatant liquid adopts chemical phosphorous removal measure to prevent

the effusive phosphorous into the sewage disposal system.

The technical process: the water from the first treatment and return sludge

flow into the anaerobic tank firstly to release phosphorus, then go to aeration

tank to biological nitration. On the base of obtaining the effect of ammonia

removal, meanwhile the organic material and phosphorus can be removed. The

disposal sewage is discharged after the secondary sedimentation tank.

In this project, the removal rate of total phosphorus (TP) can reach mostly

80%, and the effect is concerned with these factors as following: the

concentration of TP inflow, the concentration of organic materials, MLSS, IIRT

of the anaerobic tank and aerobic tank, OPD of the anaerobic tank, the DO

concentration of aerobic tank, the sludge reflux ratio, and so on. The water

outlet of BOD and SS is the same as the general activated sludge process. If

the loading of the BOD-SS is the proper range, the water quality is even better.

Because the quantity of the phosphorus in the SS of the water outlet is rather

large, the concentration of the SS of the water outlet should be reduced to ensure

the TP of the water outlet to reach standard.

The technique process is shown in Figure 2-1.

Technical measures

1) Due to the variation of P content in the influent water, separate inlets

shall be designed at the aerobic section and the anaerobic section of the aeration

tank. When the influent water has a high P content, it will flow into the

aeration tank directly through the aerobic section without bypassing the

anaerobic part.

2) According to the advanced experiences abroad, to improve the effect of

dephosphorization, the anaerobic state in the anaerobic tank should be ensured

and the amount of returned sludge to the anaerobic tank should be strictly

controlled.

For above target, adjustable valve should be set in the returning ditch for sludge

to control. the returned sludge volume to anaerobic tank ranging from 100% to

20%, and the returned sludge remains wil.l go directly into the aerobic section

of the aeration tanks.

43


3) Drug-out pipes of the chemical dephosphorization and Chlorination shop

are connected to the respective seepage pipes of the secondary sedimentation

tanks and the dewatering house so as to add the appropriate drugs, decrease the

phosphor content of outgoing water in the secondary sedimentation tanks and

prevent the seepage from releasing phosphor and resulting in secondary pollution.

4) To improve settling effects of the secondary tanks, advanced technologies

are to be imported to build all-round-in all-round-out secondary sedimentation,

so as to improve the settling efficiency, reduce the diameter of the

sedimentation tanks, the amount of works, costs and land acquisition.

44

Contact tank * Chlorization shop

_)

Sec. Sedimentation tank |

Sludge pump well

Aerobic tank _

I * ~~~~~~~~~~~IF

aGrit chambern Sludge storage shed

C) C) D

rg O | I0nlet pump house 1

C)~~~~F

i | ~~~~~~~Thick grid |I.

C)~~~~

C) t

o""I

.E~~~~


Fig. 2-1 Sch4eme 1: Flow sheet of A /0 Process for P Removal

46


2.4 Sewage Volume and Construction Capacity

2.4.1 Current Sewage Discharge

According to "Feasibility Study Report of Jinagdongnanqu WWTP and Sewerage" the fixed number of service years of the project is up to 2010 year and theservice area include Ningzhong area, Huancheng Road, Central area of Ying county,town of Cicheng and town of Dongqian Lake. According to the analysis onthe records of the three pump stations under Jiangdongnan District, the presentsewage volume for this system is 48600m3/d (Yin County central area not included,and that of Cicheng town and Dongqian Lake town are shown in their respectivereports). For details see Table 2-4

Table 2-4 Sewage Volumes as per the Record of Pump Station

Pump station Feature Qty Daily running Sewage volume

Ningzhong Interflow 4 big pumps Only one small 12000 m3/d

2 small pumps pump runs for

fine days

Wudongzha Sewage 4 pumps 13200 m3/d

Huannan Sewage I big pump 7h running 23400 m3/d

2 small pumps

Total 48600 m3/d

According to the statistics for the flow of the main sewers in the systemby Ningbo Planning Institute and Municipal Administration department, thepresent sewage volume for this system is 42400 m3/d (Yin County central. area,

Cicheng town and Dongqianhu town not included). For details see Table 2-5

Table 2-5 Sewage Volumes as per the Records of Sewer

Sewer section Service range (ha) Population Sewer size Flow (m 3/d)

(mm) __ _ _

Changchunlu 91.14 21100 300-1600 5500

Jiefanglu 96.98 21000 300-900 5900

Lingqiaolu 11.30 2600 300-400 700

Huanchengxilu 206.13 47000 300-900 12500

Jiangdongnan 295.25 68700 300-1000 17800

Road

47


Total I I l 42400

2.4.2 Forecast on Designed Sewage Volume

(1) Forcast of sewage volume of Ningbo service area

According to "Feasibility Study Report for Ningbo Jiangdongnan WWTP and

sewerage ,the service area include Haishu area and Jiangdongnan area. All the

service area is 35. 4km2(Yin County central area, Cicheng town area and Dongqianhu

town are not included). The sewage discharge for service area is pridicted on

the base of the current and the forcast of sewage volume in those service area.

The result is shown in table 2-6.

Table 2-6 Predicted sewage discharge volume

with the Three-river service area________________________ 2005 2010 2015 2020

living industry living industr living industry livin industr

1 Water consumption (104m 3/d) 8.96 1.09 10.89 1.17 12.78 1.72 14.09 2.41

2 Sewage discharge rate 0.85 0.8 0.85 0.8 0.85 0.75 0.85 0.75

3 Sewage collection rate 0.7 0.7 0.8 0.8 0.8 0.8 0.85 0.85

4 Seepage factor 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1

5 Sewage (104m 3/d) 5.9 0.7 8.1 0.8 9.6 1.1 11.2 1.7Total (-1O4m3/d) 6.54 8.97 10.70 12.89

(2)Forcast of sewage volume of Yinzhou area

According to the master plan of Yin County central area, the sewage dischage

for Yin County central area is pridicted by several different ways.The result

is shown in table 2-7.

Table 2-7 Predicted sewage discharge volume

with the Yin County central arear ___________-____ 2005 2010 2015 2020

an Water ter Land Water Wate Land Water Water Land Water Water

_____ ___________________ use supply use use supply use use supply use use supply use

Coverd area 10 15 19 21

48


(kMI2 )

Sewage flueratio scale 0.55 0.55 0.55 0.6

(UIs.ha) _ _2 Water supply 9 11.5 14 16

_(104m/d)Sale to supply ratio | 0.82 0.82 0.82 0.82

Sewage disch 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85______ arge rate

Sewage colle 0.7 0.7 0.7 0.7 0.7 0.7 0.8 0.8ction rate

I Seepage factor 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1Water useing

3 standards (include 400 420 440 460industrial water)

Population (10 4 )\ 14 21 26 31Sewage volume

4 e vo104 ml3/d) 4.75 4.8 3.7 7.13 6.2 5.8 9.03 7.5 7.5 10.8 9.8 10.7

Average sewage volume 4.42 6.36 8.01 10.46

_____ (10 4 m3 /d) I I I_I

(3)Forcast of sewage volume of Cicheng town and Dongqianhu area

The detail description of forcast of sewage volume of Cicheng town and

Dongqianhu area can be find in "Fisibility Study Report of Jiangbei area Cicheng

town environment protection engineering" and "Fisibility Study Report of

Ningbo Dongqianhu area environment protection engineering" .The pridicted

sewage volume result is shown in table 2-6.

Table 2-8 Predicted sewage discharge volume unit: 104m3/d

area 2005 2010 2015 2020

Gucheng area 0.25 0.40 0.43 0.48New area 0.24 0.66 1.05 1.57

Dongqianhu area 1.09 1.95 3.92 6.74total 1.49 3.01 5.4 8.79

4. Forcast of WWTP sewage volume of Jiangdongnanqu

49


The statistics on WWTP sewage volume of Jiangdongnanqu has been get from above

tables 2-6, 2-7, 2-8. The result is shown in table 2-9.

Q 2-9 Statistics on WWTP sewage volume of Jiangdongnanqu

year 2005 2010 2015 2020

Sangjiangpian 6.33 8.08 10.27 12.35

Yin County central area 4.42 5.44 8.01 10.46

Cicheng town 0.40 1.06 1.48 2.05

Dongqianhu 1.09 1.95 3.92 6.74

total (104 m 3 /d) 12.23 16.53 23.68 31.60

2.4.3 Designed scale

Because the building periods of WWTP of Jiangdongnanqu is between 2005 and 2010

combined with the statistics forcast results of table 2-9,,this treatment plant capacity will be

160000 m 3/d.

50


2.5 Sewage Disposal Grade

2.5.1 Sewage quality

According to the "The drainage standard in outdoor design (GBJ14-87)" , the

average pollution load per capita is BOD5 20-35 g/d, and the concentration of

sewage is related to water consumption amount. When the amount of water

consumption per capita varies between 150-350 L/d, the BOD5 is 160-70 mg/L. For

domestic sewage, the quality of sewage is closely related to the living standard.

The general trend is that the sewage amount as well as polluting load will

increase but the concentration of pollutants in the sewage will decrease as the

increase of the living stand. However, when the society has developed to certain

level, the reuse of domestic sewage will be increased, so will the recycling

of domestic rubbish. Therefore the average sewage discharge and the polluting

load per capita will decrease. Because the domestic sewage is mixed with

different kinds of industrial wastewater, its quality can only be analytically

determined.

Twice large-scale activities of sewage monitoring were conducted in Ningbo

City. On March 10-13, 1993, sewage samples were collected from the Yinjiang-an

Pumping Station, west Jiangxia Bridge Pumping Station, west Lingqiao Pumping

Station and the 4 main flowing automatically drainage exits. On March 3,5, 1997,

Sewage samples were collected from Yinjiang Pumping Station, the pump station

at Ningbo High School, the exit at the east side of Zhongshan Road, Xiaowen

Pumping Station and the pump station at the north Zhongxin Road. The analytical

results of these samples are listed in the accessory tables.

These monitoring results are evaluated by taking "The integrated discharge

standard of the second class" as reference.

Results of 1993:

The pH value of the domestic sewage of Ningbo urban district was 7. 12-8. 09

with an average of 7.23. Generally, it conforms to the standards. But sewage

acidity was too strong in certain time and for a few pumping stations, its pH

value was as low as pH 2.23.

The value of SS was 1. 5-204 mg/L with an average of 226mg/L, and it was 50%

higher than the requests of the standard.

51


The value of CODcr was 56. 5-382 mg/L with an average of 211mg/L, 40% higher

than the requests of the standard.

The value of BOD was 24-163 mg/L with an average of 81mg/L, 1. 7 times higher

than the requests of the standard.

The value of NH3-N was 7. 1-84. 1 mg/L with an average of 36. 0 mg/L, but higher

in the residence areas (Yinjiang Pumping Station and Kongpu Pumping Station).

The average in these areas is 44% higher than the requests of the standard.

The value of total phosphorous was 0. 4-6. lmg/L with an average of 2. 9 mg/L,

1.9 times higher than the requests of the standard

The values of petroleum-like materials contents were all conformed to the

standard except those at Huaishu Road Pump Station.

Copper (Cu) content ranged from <0. 01 to 0. 19 mg/L with an average of 0. 015

mg/L, it was far below the request of the standard.

The concentration of Zn was usually <0. 05-0. 57, much lower than the request

of the standard except a highest value of 10. 95 mg/L found at Huaishu Road Pump

Station, which was 1.1 times higher than the standard due to the acceptation

of industrial wastewater.

The total value of Cr was 0. 004-0. 21mg/L with an average of 0. 013mg/L,

conformed to the standard.

The CODcr and BOD, of sewage in Ningbo City was relatively low, mainly due

to the mixed collection of rainwater and sewage in some pump stations together

with its abundant precipitation.

The results of 1997:

The value of pH varied between 7. 01-8. 26, it was conformed to the standard.

The value of SS was 66. 7-262. 7mg/L with an average of 125 mg/L, 50% lower

than the standard.

The value of CODcr was 24. 0-309mg/L with an average of 106 mg/L, 40% lower

than the standard.

The total phosphorous content was 0. 48-5. 1 mg/L with an average of 1. 64 mg/L,

64% higher than the standard.

The values of petroleum-like materials contents were much lower that the

standard.

The monitoring results of 1993 and 1997 shows that the quality of sewage

in Ningbo City varies a lot, the pollutant contents in sewage at the pumping

station in main resident district are comparably higher. Because of the mixed

collection of rainwater and sewage by the sewer system in most districts of Ningbo

52


City, the pollutant concentrations in sewage are relatively low.

According the sewage quality investigation of the sewage disposal plant in

Northern Jiangdong District of Ningbo City, the parameter of the sewage quality

is COD, llOmg/L, BODs 84mg/L, TN 15mg/L, and SS 160mg/L. See table 2-14 for

details.

53


Table 2-1 1 Sewage Monitoring Results of the PuLIlpilng Stations in Ningbo (1993.3.10-1993.3.13 Unit mg/L expect pH coliform group/L)

Yijiang Xiaowe Ningzh Kongp Huansh Wudong Weste Yong

Samp g points an n ong u. u Dahelu zha Western rn Easter RiverIte pumpi pumpi pumpin ptlmpi pumpin punpin pumpin Jiangxia Ling n Ling Bridg Collect

ng ng g ng g station g station g station Bridge Bridg Bridge estation station station station g e

Water Rang 11-13 10-10 12-12 10-10 12-12 11-12 12-12 10-11 10-10 10-11 10-11 10-12temperatur Aver

tempet Aver 12 10 12 10 12 12 12 10.5 10 11 11 11_____ ____ ageI

Rang 7.31-7. 7.12-7. 7.34-7.4 7.30-7. 2.23-7.1 7.21-7.3 7.18-7.4 7.16-7.9 7.43-7. 7.68-8. 7.43-7. 2.23-8.0PH e 77 63 4 55 8 3 8 7 55 09 76 9

Aver 7.48 7.28 7.39 7.43 4.85 7.26 7.29 7.57 7.49 7.89 7.60 7.23age

Rang 58-128 53-91 19-78.5 108-49 60-216 1.5-50.5 41.5-161 127.5-27 18.5-1 225-20 166-49 1.5-204J

SS Aver 3 .5 1.5 57 44 6aver 86 73 50 264 151 23 88.5 200 88 1135 331 226

_____ _ __ age _ _ _ _

Rang 277-34 119-17 56.5-17 138-26 167-382 95-130 83-240 200-262 250-28 219-27 222-23 56.5-38 CODcr e 6 4 8 9 5 4 2

Aver 310 150 137 213 288 110 145 231 268 247 227 211age

Rang 142-16 47-73 30-68 50-94 71-92 24-48 25-81 71-118 40-148 70-85 83-111 24-163BODs e 3

Aver 156 62 57 68 87 40 57 95 94 82 97 81age

54


Rang 49.5-84 19.9-30 7.1-23.3 37.9-71 30.2-50. 15.1-25. 20.2-37. 20.2-23. 29.6-5 39.0-51 44.8-5 7.1-84.1NH3-N e .1 .2 .1-2. .8 2 6 9 3 0.0 .0 1Aver 62.7 23.5 16.4 51.4 37.3 19.6 30.5 21.8 39.8 45 47.9 36.0

a g e _ _ _ __ _ _ _ _ _ _ __ _ _ _Volatilizati Rang 0.12-0. 0.14-0. 0.01-0.0 0.09-0. 0.05-0.1 0.02-0.1 0.02-0.1 0.04-0.0 0.07-0. 0.14-0. 0.12-0. 0.01-0.9

on e 23 94 8 20 2 1 0 5 07 15 13 4hydroxybe Aver 0.16 0.40 0.06 0.13 0.09 0.06 0.05 0.045 0.07 0.14 0.13 0.12

nzene ageRang <0.01-0 <0.01-0 <0.01-0. <0.01 2 01 01 02 <0.01 <0.01-0.Cu e ~~.19 .02 01 0.1-. <001-0 <001-0 <0.0-0 0.10<.01 19Cu Aver 0.06 0.01 0.01 <0.01 0.015 <0.01 <0.01 0.02 <0.01 <0.01 <0.01 0.015

_ _ _ _ _ _ _ _ _ a g e _ _ _ _

Rang 0.07-0. 0.06-0. <0.05-0. <0.05-0 1.01-10. <0.05-0. 0.17-0.5 0.17-0.2 0.06-0. <0.05-0 0.10-0. <0.05-1CZn e 12 17 09 .08 79 06 7 7 14 .24 13 .79

Aver 0.09 0.10 0.06 0.06 4.32 0.05 0.41 0.21 0.10 0.15 0.12 0.52a g e _ _ _ _ _ _ _ _ _ _ _ __ _ _ _

Rang <0.004 <0.004 <0.004 <0.04 <0.01440 <0.214-0 <0.004 <0.004 <0.004 <0.004 <0.004 .21Total Cr 1 2.1

Aver <0.004 <0.004 <0.004 <0.04 0.055 0.06 <0.004 <0.004 <0.004 <0.004 <0.004 0.013

Rang 2.5-17. 2.15-2. 2.5-6.0 4.2-5.7 2.4-17.1 1.5-3.4 1.8-4.1 2.9-3.8 3.4-5.4 2.1-5.0 5.8-5.9 1.5-17.1Oil e 1 7

Aver 4.4 2.3 3.7 5.1 9.3 2.2 3.0 3.4 4.4 3.6 5.9 4.3

Total P Rang 5.2-5.6 1.5-2.3 0.4-2.0 3.1-6.1 0.9-4.0 1.1-1.6 1.4-2.8 1.6-2.1 3.3-3.7 2.1-2.9 3.9-5.4 0.4-6.1

55


Aver 5.4 2.0 1.4 4.4 2.1 1.4 2.4 1.9 3.5 2.5 4.7 2.9_age

Table 2-12 Monitoring results of the pumping stationis in Ningbo (1997.3.5-1997.3.6 Unit nig1L except pH)

Stati Item PH SS CODmn CODcr BOD5 NH3 -N Total Oil LASon P _ _ _

Rang 7.21-7.2 200.3-262. 19.2-20. 203-226 67.5-77. 28.1-41. 2.8-3.3 2.7-3. 0.56-0.9Mor e 6 7 2 2326 6 1 2.-335ning Avera 7.23 231.5 19.7 215 73 34.6 3.1 3 0.76

Rang 7.25-7.4 110.7-146. 26.9-21. 143-255 52.2-101 231-37 5.0-5.1 2.6-2. 1.20-1.5Mid e 3 3 3 0 9 0

ngan day Avera 7.34 128.5 24.1 199 77 30.1 5.1 2.8 1.35

Stati 8.-80 19-0e0911 .-.oan i NighRang 7.13-7.2 154.3-160. 8.3-28.0 189-309 70.9-118 29-6-32. 3.1-3.2 1.5-3. 1.03-1.5

Nigh e 7 3 9 _ _ 6 4t Avera 7.2 157.3 18.2 249 94 31.3 3.2 2.6 1.29

Range 7.13;7.4 110.7;262. 8.3-28.0 143-309 52.2-118 23.1;41. 2.8-5.1 6 0.56-1.5_ _ _ _ _ _ ~~7 71 6_ _4

Ave rage 7.26 172.4 20.7 221 81 32 3.8 2.8 1.13

Ning Rang 7.01-7.1 123.7-125. 8.5-12.8 66.9-110 24.9-35. 16.7-20 1.1-1.3 1.6-2. 1.05-1.2zhon Mor e 2 7 8.-2866910 0 2 1-.3 2 7

g ning Avera 7.06 124.7 10.7 88.5 30 18.5 1.2 1.9 1.16pum ge

56

Ningbo Jiangdongnanqu WWTP and Sewerage Project _ EIA

ping Rang 2 185.3;204. 15.6-15. 54.7-72. 19.2-28. 1. 5-2. 1.27-1.2saiMid Ran 721-. 18.-24 156-5 160-211 7 4 2.0-2.0 *6 7on day 7.32 195 15.6 186 64 23.8 2 2.1 1.27

Rang 7.21-7.2 133.0-138. 15.4-15. 139-162 44.7555 25.3-31. 1.9-2.1 4.0-4. 1.41-1.5Nigh e 6 3 7 ____ ___ 4___

t Avera 7.24 135.7 15.6 151 50 28.2 2 4.2 1.48ge

Range 7.01-7.4 123.7-204. 8.5-15.7 66.9-211 24.9-72. 16.7-31. 1.1-2.1 1.5-4. 1.05-1.52 7 _ _ _ _ 7 1 __ _ _ 4 5Average 7.21 152 14 142 48 23.5 1.7 2.7 1.3

Rang 6.99-7.0 96.3-100.3 8.0-8.1 40.1-42. 22.4-22. 15.7-15. 1.6-3. 0.37-0.5Mor e 6 963103 8081 9 9 7.-11 4 1ning Avera 7.02 98 8 42 23 15.7 1.1 2.5 0.44

ge

Xiao Mid Rang 7.18-7.3 100.0-103. 9.6-22.1 42.1-144 22.8-61. 13.1-15- 1.1-1.1 2.5-3. 0.51-0.5Mid e 1 7 6 3_____4___3

wen da Averapum y 7.25 102 16 93 42 14.2 1.1 3 0.52ping 1stati Nigh Rang 7.11-7.1 73.3-86.7 10.82-16 48.1-108 24.0-42 9 10.6-13. 1.3-1.4 2.1-2. 0.62-1.0on Nigh e 72296

Aera 7.14 80 14 78 33 12.3 1.4 2.4 0.81

Range 6.99-7.3 73.3-103.7 8.0-22.1 40.1-144 22.4-61. 10.6-15. 1.1-1.4 1.6-3. 0.37-1.0~ ~~~~1 733137 802. 0114 6 7 ____ 4 0

Average 7.14 93 13 71 33 14.1 1.2 2.6 0.59Mor1 Rang 7.28-7.3 24.0-52. 14.6-25. 1.0-1. 0.35-0.4Zho e 4 66.7-81.3 5.8-7.9 1 7 5.8-9.9 0.8-0.8 3 8n in g e_ _ _ 4_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 7_ _ _ _ 3__ _ _ _ _ _ _ _ __5

57


ngxi Avera 7.31 74 7 38 20 7.9 0.8 1.2 0.83ng ge___

pum Rang 7.40-9.1 71.7-84.3 9.1-11.4 36-44 22.9-24. 5.2-8.7 0.9-0.9 1.0-1. 0.32-0.3ping Mid e 1 7178.9.-1. 64 .287 0909 7 8stati day Avera 8.26 78 10 40 24 7 0.9 1.4 0.35one

NhRang 6.47-7.6 77.0-83.7 10.2-10. 38.1-56. 25.9-33. 9.1-28.1 1.0-1.0 2.7-2. 0.42-0.4Nigh Rag 2 70-37 8 1 9 9.-8. .0105

t Avera 7.05 80 10.5 47 30 18.6 1 2.8 0.44

Range 6.47-9.1 66.7-84.3 5.8-11.4 24.0-56. 14.6-33. 5.2-28.1 0.8-1.0 1.0-2. 0832-0.4

Ave rage 7.54 77 9 42 25 11.2 0.9 1.8 0.54

Zho Rang 7.02-7.0 133.0-162. 5-4.6 31.8-41. 18.8-19. 7.2-7.9 0.48-0. 0.8-1. 0.21-0.3ngsh Mor 9 3 45.6 6 4 7.-. 48 ___ 7an ning Avera 7.05 147.7 4.5 36.7 19 7.5 0.48 1.2 0.29St. _ _ _ _

Out Rang 6.98-7.0 127.0-184. 11.1-11. 62.1-64. 26.6-27. 9.1-93 0.6-0.7 1.6-3. 0.47-0.4fall Mid Rag 0 7 8 1 8 9193 0607 0 8

day Avera 6.99 156 11.5 63 27 9.2 0.7 2.3 0.48

Rang 7.06-7.0 77.7-108.0 .5-11. 54.1-60. 33.2-33. 6.8-8.4 0.6-0.7 2.2-3. 0.56-0.6Nigh __ _ _ 8 2____ ___5 6

t Avera 7.07 93 11 57 33.5 7.7 0.7 2.9 0.61

Rang 6.98-7.0 77.7-184.7 4.5-11.8 31.8-64. 18.8-33. 6.8-9.3 0.5-0.7 0.8-3. 0.21-0.6Rang8 777184.7 4.5-11.8 1 8 6.8-937 5 6

58


Average 7.04 132 9 52 26.5 8.1 0.06 2.1- 0.46E rang 7.01-8.2 66.7-262.7 4.5-28.0 24.0-30 14.6-11 5.2-41.1 0.48-5 0.8-4. 0.21-1.5

~~rang ~~6 6.26. 4.-80 9 8 5.-11 .1 4 5E average 7.24 125 13.1 106 48.7 18 1.64 2.4 0.80

Table 2-13 Sewage Monitoring Results of the Pumping Stations in Ningbo (1997.9.7-1997.9.8 Unit mg/L exceptpH Coliform grou p/L)

Stati Item PH SS CODcr CODmn BOD5 NH3 -N Total Oil LASon mn 5 3 P

59

Ningbo Jiangdongnanqu WWTP and Sewerage Project ElA

Ran 6.82-6.84 60.0-65.0 27.0-35. 60.41317 2.7-9.2 7.2-9.5 46 0.2-4. 0.12-0.3Mor 6.26.46e0650 0 6.-07 2792 7295 46 4 3ning Aver 6.83 62.5 31.0 8. /8 6.0 8.4 0.95 2.3 0.23

Wen ~~ age

jaol Mid Ran 6.70-6.88 60.3-64.3 37.0-46. 8.9-11.7 7.9-9.3 1.05-1. 2.6-4. 0.11-0.2u Mid ge ____0 35 1 7

pum day Aver 6.79 62.3 40.5 10.3 8.6 1.20 3.4 0.19

ping Ran 45.0-49. 1.35-1. 3.1-5. 0.14-0.1stati Afte ge 6.63-6.83 62.7-75.0 0 6.8-10.3 8.5-8.9 65 6 8on rnoo Ae .36.

n Aver 6.73 68.9 47.0 8.6 8.7 1.50 4.4 0.16_ _ _ age_ _ _ _ _

Range 6.63-6.88 60.0-75.0 0 6.8-10.7 2.7-11.7 7.2-9.5 043-1. 0.2-5. 0.11-0.30 ~ ~ _____65 6 3

Ave rage 6.78 64.6 39.5 8.8 8.3 8.6 1.22 3.4 0.19

Hual Ran 6.84-6.87 56.7-88.3 38.0-51. 12.0-12. 5.6-10.1 7.0-24.5 94-1. 3.1-14 0.18-0.2shul Mor ge 0 1 2 .1 6

u ning Aver 6.76 72.5 44.5 12.1 7.9 15.8 1.11 8.6 0.22pum .. age

ping Ran 6.61-6.86 86.7-91.0 57.0-153 13.2-14. 5.4-19.7 0.80-0. 4.3-17 0.20-0.3

stati M id ge . __ __ _ 99_____

on day Aver 6.79 88.9 105 13.7 12.6 0.90 10.7 0.25_ _ _ a g e_ _ _ _ _ _ _ _ _ _

Afte Ran 6.59-6.94 84.0-93.3 27.0-87. 11.0-11. 5.7-21.0 0.49-1. 2.6-9. 0.14-0.5rnte 6.96.4 8.09. 0 5.-1. 04 1 9

n Aver 6.77 88.7 57.0 11.3 13.0 0.77 5.9 0.37

60


Range 6.59-6.94 56.7-93.3 27.0-153 12.0-12- 5.6-14.1 5.4-24.5 0249-1. 2.6-17 0.14-0.5Range 6.59-694 56.7-93.30 1 561. 5I-5 *28 .1 9

Average 6.77 83.4 68.8 12.1 11.0 13.8 0.93 8.4 0.28

rRaen 6.73-6.89 80.0-81.3 29.0-37 7.0-8.9 4.4-5.3 3.0-3.8 0.49-° 0.2-0. 0.07-°Mor ge _ _ _ _ _ 0 88 3 2ning Aver 6.81 80.7 33.0 7.9 4.9 3.4 0.69 0.3 0.10

ageXiao Ran 6.75-7.42 83.3-128.3 32.0-39. 6.5-8.0 2.7-3.7 0.50-0. 0.2-0. 0.05-0.1wen Mid 6.57428e-183 0 6.980 21-373 1pum day Aver 7.09 105.8 35.5 7.3 3.2 0.71 0.3 0.08ping _ agestati Afte Ran 6.74-7.1 95.0-121.3 22.0-32. 3.1-13.7 2.6-3.5 0.67-1. 0.2-0. 0.09-0.2on 2rnouo ge2 0 12 5 0

n Aver 6.93 108.2 27.0 8.4 3.1 0.89 0.3 0.15ageRange 6.73-7.42 80.0-128.3 22.0-39 7.0-8.9 3.1-13.7 2.6-3.8 0.689-0. 0.2-0. 0.05-0.2

Ave rage 6.94 98.2 31.8 7.9 6.9 3.2 0.76 0.3 0.11Dah Ran 6.65-6.90 92.0-96.7 47.0-141 14.1-17. 4.7-4.7 1.78-1. 0.7-1. 0.32-0.9elu Mor ge 66-90 9.967 .0 _____ 5 84 1 5

pum ning Aver 6.78 94.4 94.0 16.0 4.8 1.81 0.9 0.64ping aesonti Mid Ran 6.66-6.87 102.7-126. 64.0-87. 12.4-32. 13.7-23. 4.5-6.9 0.71-1, 2.0-2. 0.80-1.1

on Mid__ge 7 0 9 2 970

day Aver 6.77 114.7 75.5 22.7 18.5 5.7 1.82 2.4 0.95

61

Ningbo Jiangdongnanqu WWTP and Sewerage Projcct EIA

AeRan 6186695113.0-117. 73.0-78. 14.1-16. 1.60-1. 2.5-2. 0.72-1.0Afte 6.6-.9 0 0 4 4256 71 8 3

n Aver 6.82 115.0 75.5 15.3 4.9 1.66 2.7 0.88age

Range 6.65-6.95 92.0-126.7 47.0-141 12.4-32. 13.7-23. 4.2-6.9 1.60-1. 0.7-2. 0.32-1.1Range 6.5-6.95 9.0-126.7 .0 9 2 4269 93 8 0

Ave rage 6.79 108.0 81.7 22.7 16.6 5.1 1.76 2.0 0.82

Mor Ran 6.80-6.84 120.7-147. 208.0-26 57.6-67. 42.0-90. 3.4-9.7 3.96-4. 2.7-7. 1.19-1.4ning ge ~~7 4.0 7 4 5

ning g 6.82 134.2 236.0 32.7 66.2 6.6 4.28 5.1 1.34

Kon Ran 6.70-6.95 156.0-163. 155.0-21 41.0-64. 4.0-8.3 3.40-3. 2.8-5. 1.57-1.6Kon Mid 6g7-695 0 3.0 1 4083 65 0 2

pum day Aver 6.83 159.5 184.0 52.6 6.2 3.53 3.9 1.59

ping Ran 135.0-138. 177.0-20 11.0-76. 3.31-4. 3.3-7. 1.41-1.7stati Afte ge 6.72-6.77 3 1.0 4.5-8.7 59 2 2

on rnoo Avern 6.75 136.7 189 44.0 6.6 3.95 5.3 1.57

120.7-163. 155.0-26 57.6-67. 11.0-90. 3.31-4. 2.7-7. 1.19-1.7Range 6.70-6.95 0 4.0 74 3.4-9.7 59 4 2

Averag 6.80 143.5 203 62.7 54.3 6.5 3.92 4.8 1.50

nZghxoi Mor an 6.99-7.04 66.0-79.7 27.0-44 8.5-10.3 2.9-4.4 1.6-3.5 63 0.3 0.13-0.1

nglu ning Aver 7.02 72.9 35.5 9.4 3.7 2.6 0.57 0.3 0.14

pum age __ _

stati Mid Ran 6.92-7.02 75.3-105.0 25.0-32. 4.8-5.0 1.7-3.4 0.61-0. 0.5-0. 0.11-0.1stati day 4.8-5.0e1.7-3. 79 6 4

62

Ningbo Jiangdongnanqu WWTP and Sewerage Project _ EIA

on Aver 6.97 90.2 28.5 4.9 2.9 0.70 0.5 0.13a g e_ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _

After an 6.98-7.13 77.7-80.3 58.0-64. 3.8-4.2 1.4-3.0 87 0.4-0. 0.1450.2noon Aver 7.06 79.0 61.0 4.0 2.2 0.68 0.5 0.21

age _ _ _ _ _

Range 6.92-7.13 66.0-105.0 25.0-64. 8.5-10.3 2.9-53.0 1.4-3.5 87 6 0.11;0.2__________ 0 87 6 7

Ave rage 7.02 80.7 71.7 9.4 4.2 2.5 0.65 0.4 0.16

IRan 6.76-6.80 65.3-79.3 47.0-73. 12.1-14. 15.9-17. 4.0-4.8 1 .18-1. 1.2-1. 0.55-0.6Mor g ~ _ _ _ 0 6 1 69 7 6ning Aver 6.78 72.3 60.0 13.4 16.5 4.4 1.44 1.5 0.61

_ _ _ _ _ a g e _ _ _ _ _ _ _ _ _ _ _

Ran 6.92-6.95 69.3-73.3 59.0-101 14.7-18. 4.1-4.4 1.59-1. 1.1-2. 1.42-0.7Gaot Mid 6.26.5 6.37. .0 4 4.-. 65 5 0ang day Aver 6.94 71.3 81.5 16.6 4.3 1.62 1.8 0.56pum ____ age_

_ _ _

stati AfterRan 6.77-6.77 73.0-73.3 73.0-98. 9.9-17.8 3.7-4.5 68 3.2-3. 0.5010.7on noon Aver 6.77 73.2 85.5 13.9 4.1 1.56 3.6 0.61

___ __ age _ _ _ _

Range 6.76-6.95 65.3-79.3 47.-104 1261-14. 9.9-18.4 3.7-4.8 1.18-1. 1.193. 0.4210.7

Average 6.83 72.3 75.6 13.4 15.7 4.3 1.54 2.3 0.5922.0-264 0.43-4. 0.2-17 0.05-1.7E range 6.59-7.42 56.7-163.0 °0 6.8-67.7 2.7-90.4 1.4-24.5 59 .1 '; 2

Eaverage 6.85 93.0 77.4 19.6 16.7 6.3 1.54 3.1 0.52

63

Ningbo Jianigdonignanqu WWTP and Sewerage Project EIA

Table 2-14 Sewage Monitoring Results of the Proposed Renovation Pumping Stations (2002.6.7-2002.6.8 Unit:

mga/L xcept pH, Conliform unit: group/L)

Sta Itm H OFecal nAmmoi LAtio O Item pH DO CDcCOD BODS TP conlifor nia

n ~~ ~~~~ ~~r Mn nigopnitrogn m group e

_______ ~~~~~~~~~~~~~~~~en

6.75-8. 2.07-2. 102-1 25.9-4 65.4-7 1.96-1.9 I?2.4X 7.60-1 1.18-1. 1.13-1.

Morni Range 78 35 29 5.4 3.7 9 105 1.0 29 25

ng Average 7.77 2.21 115.5 35.7 69.6 1.98 >12.45X 9.30 1.24 1.19

_______ _________ _______ ~~ ~~~105 9 3 . 41 1

Nin Range 6.74-6. 2.15-2. 112-1 26.5-4 38.2-4 1.16-2.3 X2.4 X 7.05-1 0.82-1. 0.94-1.

gzh Midda 75 20 84 3.3 7.3 4 105 0.2 63 21

ong Y Average 6.75 2.18 148 34.9 42.8 1.75 >2.4 X 8.63 1.23 1.08

pu 105

mp Range 6.81-6. 1.75-2. 200-2 26.8-4 65.2-1 2.28-2.2 2.4 X 8.82-1 2.27-2. 1.05-1.

ing Aftern 88 93 62 2.7 35 9 105 0.4 76 39

stat on> .ion Average 6.85 2.34 231 34.8 100.1 2.28 12045X 9.61 2.52 1.22

Range 6.75-8. 1.75-2. 102-2 25.9-4 38.2-7 1.16-2.3 2.4 X 7.05-1 0.82-2. 0.94-1.

78 93 62 5.4 3.7 4 105 1.0 76 39

Average 7.12 2.24 164.8 35.1 70.8 2.00 >,2.4 X 9.18 1.66 1.16

Wu Morni Ra e1 6.82-6. 2.45-2. 189-2 38.3-4 59.2-1 2.50-3.6 Ž2.4X< 16.0-2 1.44-2. 0.97-1.

64

Ningbo Jiangdongnanqu WWTP and Sewerage Project _ _ _ EIA

Average 6.90 2.60 203.5 43.5 124.6 3.09 z2.4X 21.4 1.78 1.09105

7.01-7. 2.03-2. 189-3 39.7-5 70.4-1 3.54-3.7 ¢2.4 X 16.3-1 1.93-3. 1.01-1.Midda Range 02 11 12 0.5 35 0 105 9.6 44 17

Average 7.02 2.07 250.5 45.1 112.2 3.62 )2.4X 18.0 3.69 1.09_ _ _ _ _ _ ~~105 __ _ _ __ _ _ _ _ _ _

1.50-1. 215-2 41.0-5 69.8-1 2.71-3.0 ¢2.4 X 13.2-1 3.39-6. 0.98-1.Aftern Range 7.02 71 57 3.8 54 3 105 4.2 74 13

oon Average 7.02 1.61 238 47.4 111.9 2.87 ¢2.4X 13.7 5.07 1.06105

6.82-7. 1.50-2. 189-3 38.3-5 59.2-1 2.50-3.7 >2.4 X 13.2-2 1.44-6. 0.97-1.Range 02 75 12 3.8 90 0 105 6.8 74 20

Average 6.98 2.09 230.1 45.3 116.2 3.19 )204X 17.7 3.51 1.08______ ~~~~~ ~~~105_ _ _ _

Hu | 7.13-7. 2.17-2. 56.4-6 25.0-3 25.9-3 0.308-0. ¢2.4 X 1.45-9. 0.63-0. 0.98-1.an Morni Range 19 33 5 3.2 9.8 434. 105 70 78 00n a ng >,2.4 X 55.1 09nna ng Average 7.16 2.25 60.7 29.1 32.9 0.371 105.58 0.71 0.99

p u 2.96-3. 2.09-2. 79.2-8 26.7-3 23.0-2 0.355-0. 2.4 X 7.63-1 1.18-1. 0.88-1.Mp Midda Range 00 20 0 4.7 5.8 562 105 0.2 19 15ing MidIagstat Y Average 2.98 2.15 79.6 30.7 24.4 0.459 52.4X 8.92 1.19 1.02ion 105 ____

Aftern 5.72-6. 1.21-1. 105-1 27.2-4 21.8-3 0.51-2.2 >?z2.4 X 5.41-1 1.40-1. 0.88-1.oon Range 33 30 31 1.5 0.4 0 105 1.0 78 16

65


Average 6.03 1.26 118 34.4 26.1 1.36 2.4 X 8.21 1.59 1.02______ ______ ~~105

Range 2.96-7. 1.21-2. 56.4-1 25.0-4 21.8-3 0.308-2. 2.4 X 1.45-1 0.63-1. 0.88-1.Range 19 33 31 1.5 9.8 20 105 1.0 78 16

Average 5.39 1.89 86.1 31.4 27.8 0.730 )12.45X 7.57 1.16 1.01_________________ ~~~~~~~~~105

2.96-8. 1.21-2. 56.4-3 25.0-5 21.8-1 0.308-3. )2.4 X 5.41-2 0.82-6. 0.88-1.E range 78 93 12 3.8 90 70 105 6.8 74 39

E average 6.50 2.07 160.5 37.2 71.6 1.75 >2.4X 11.5 2.11 1.08

66


Sampling analysis was carried out on the 4 mainly gravity sewage outlets from 10-13 March 1993,i.e. Yijiangan pumping station, Western Jiangxiaqiao pumping station,

Western Ling Bridge pumping station. Another survey was carried out on5-6 March ,1997 by Environment Monitoring Center to Yijangan pumping

station ,Ningbo School pumping station ,outlet on east side ofZhongshantong Street ,Xiaowen pumping station ,North Zhongxing Roadpumping station .Analysis on the monitoring results in 1993 shows that the

item of pH volatilization hydroxybenzene, Cu, Zn, Total Cr and oilconform to GB8978-1996 Class II "Integration Effluent Quality

Standard". Other items exceeds GB8978-1996 Class II "IntegrationEffluent Quality Standard", of which BOD5 exceeds 1.7 times, the worst one.

According to the analysis to each pumping station, the residential area(Yingjiangan pumping station and Kongpu pumping station), the indexes of

ammonia nitrogen and total P are higher.

According to the 9.7-9.8 monitoring results on 5-6 March 1997, the items of pH, SS,

CODcr, ammonia nitrogen, oil LAS conform to G138978-1996 Class II "Integration Effluent

Quality Standard", and total P exceeds the standard a little .The analysis of the pumping

stations shows that the sewage of Yingjiangan pumping station is the worst one for this

pumping station is located at the residential area so CODcr, ammonia nitrogen, total P exceed

the standard more seriously.

Based on the analysis on the three renovation pumping stations, the items of ammonia

nitrogen LAS, oil in the sewage discharged conform to GB8978-1996 Class II "Integration

Effluent Quality Standard". pH, CODcr. BOD5 , TP and Coliform exceed the standard. The

analysis in each station shows that the items of CODcr. BOD5 , ammonia nitrogen and

total P indexes in Wudongzha pumping station and Ningbo School pumping station are

higher due to their locations in the residential area . The pH effluent of Huanchengnanlu

Pumping station shows a certain degree of acid due to the industrial enterprises in the area.

Other survey show that the inlet water quality of Ningbo Jiangdongbei WWTP in 2001

was: BOD5: 98mg/1l CODcr: 266mg/L, SS: 209mg/L, NH3-N: 17mg/L, TP: 5.17mg/L

The analysis on the monitoring results shows that the quality of sewage in Ningbo varies

greatly. But the overall analysis shows that the total pollutants in the sewage of Ningbo are

lower due to the combined sewers accounting for a larger part of the sewerage, the content of

pollutants is diluted by storm water. At the same time most enterprises are located at the bank

of the rivers their sewage is discharged directly into Yong River and Fenghua River without

67


entering into the sewage pumping stations.

In recent years with the faster development of the city area, there are many houses have

been dismantled and built and many enterprises in the urban area have been relocated,

therefore, The monitoring results in Huanchengnanlu pumping station, Wudongzha pumping

station and Ningbo Middle School pumping station can reflect the quality of the inlet sewage

in the three service areas to Jinatongnanqu WWTP more objectively.

2.5.2 Design Sewage Quality

1, Influent water Quality

The design influent quality of Jiangdongnan WWTP is as follows

BOD5 120mg/L

CODcr 240 mg/L

SS 150 mg/L

NH3-N 30 mg/L

TP 4 mg/L

2, Effluent water Quality

The effluent water quality of Jiangdongnanqu WWTP is determined according to

GB8978-1996 Class II "Integration Effluent Quality Standard"

BOD5 S 30mg/L

CODcr 120 mg/L

SS 330 mg/L

NH3-N < 25 mg/L

TP <l I.0mg/L

2.5.3 Degree of Treatment

The treated degree of the WWTP should reach (pollutant removal rate ):

EBOD )75%

ECOD,>50%

ESS>,80%

ETPA75%

2.6 Project Management and Implementation Plan

68

Ningbo Jiangdongnanqu WWTrP and Sewerage Project EIA

2.6.1 Principle and Procedures for Implementation

The implementation of the sewage treatment plant project shall be in compliance with

construction and approval procedures of domestic capital construction project, and it is

necessary to create good conditions for using loan from the World Bank by cooperating

actively with departments concerned.

A project implementation organ will be set up. Acting as project implementation unit and

user of the imported equipment, it is responsible for organizing project implementation,

project coordination and management. The authorized person in charge of the project

implementation organ shall be responsible for decision-making, commanding and execution

as well as internal and external negotiation and liaison in the course of the project

implementation. The organization, which is authorized to deal with foreign business, shall be

appointed as the Buyer of the imported equipment, and shall responsible for foreign

commercial and technical negotiation and liaison.

The design organization, equipment supplier and construction contractor of the project

shall go through necessary legal formalities with the project implementation organ and any

behavior of breach of contract shall be settled in accordance with the relevant laws and

regulations issued by the state

2.6.2 Project Construction Management Institution

The construction management of this project shall be in the charge of "Ningbo

Municipal Development Planning Commission" and "Ningbo City Construction

Commission" under the Ningbo municipal government.

"Ningbo Municipal Development Planning Commission is responsible for working out

yearly and long-term plan for the city' s national economy and social development and their

comprehensive balance and coordination. It is also responsible for working out the plan for

using foreign loan and responsible for approval of the project using the loan and examination

and approval of the feasibility study report of the said project.

69


Ningbo City Construction Commission is responsible for managing the city planning and

construction.

2.6.3 Project Operation Management

Ningbo City Construction Commission will appoint "the Urban Infrastructure

Development Office of Ningbo municipality" to act as the construction management organ

of this project as per previous practice of the project implementation, which is supported by 5

functional departments:

(1) Administrative department

Responsible for daily administrative affairs as well as reception of and liaison with the

project performers.

(2) Planning and financial department

Responsible for arrangement of project financial plan and implementation plan; handling

formalities about contract and agreement with the project performers as well as formalities

about fund application, income and expense.

(3) Construction management department

Responsible for coordination and commanding of civil works and equipment installation;

supervision and inspection on construction progress, schedule, quality, and safety as well as

acceptance of the project.

(4) Equipment and material control department

Responsible for ordering, procuring, storing and allocating the equipment and materials

for the project.

(5) Technical management department

Responsible for management of technical documents and files; assisting in technical

interpretation for foreign experts working on the site; taking care of joint review on designed

70

Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAdrawings; handling relevant technical problems and organizing technical training and

examination.

2.6.4 Schedule of Project implementation

The implementation schedule of this sewage treatment plant project is detailed in Table

2-16.

71

Ningbo Jiangdongnanqu WWTP and Seweragc P'roject EIA

Table 2-16Schedule Program for Jiangdongnan Sewage Treatment Plant Schedule Program for Jiangdongnan Sewage

Treatment Plant200! 2002 = 2003 2004 2005 2006 2007 2008

No\ Item I - 12 1- 6 7-12 1- 4 5 - 8 9 - 12 1 - 12 1- 12 1-12 1-12 1-12

2 -aisal t s u A ppniJ

4 Lam n rg9ationl5 fil kot I T, f F /T,W1 Bidding

6 A -I I N U ItDetail design

7 Cshonpii atcicn

8 -~Lf1iY - -- --

8 Construction

10 Test running

1 ICompletion/Acceptance

72


73

2.7 Project Construction Management

2.7.1 Construction Period

The construction period of the project will last for three years

2.7.2 Construction machines

General construction machines

2.7.3 Main Earthworks

The project mainly includes the construction of the WWTP and sewerage and river

crossings.

According to the information from the unit conducting the feasibility study report, the

I and 3,excavation of the WWTP will be 63000m fill, 76000 m . All the excavation earth can be

used for fill back besides that 13000m3 backfill will be needed.

Two methods will be used for sewerage networks, one is excavation of groove method

construction for small diameter pipes, which need to excavate earth of 100000m3 of which

83000 m 3will be used for backfill and 1000Gm 3 gravel and earth will be used to earth up;

another is push-pipe construction method for larger diameter pipes and construction

excavation will be 36000m3 s the abandoned earth will be 53000m 3

The pipeline sinking process will be adopted .Earth excavation is needed before piping

sinking and the amount of earth excavation is 3200m3 ,and The total 2580m3 is needed for

fill All earth fill will be taken by earth excavation ,and there will be 620m3 of abandoned

earth .

2.8 Pollution Sources Analysis of the Project

2.8.1 Pollution Source Analysis in the Operation Stage

The main pollution sources are discharged effluent grit and other solid wastes.

2.8.1.1 Effluent of the WWTP

Ningbo Jiangdongnanqu WWTP & Sewerage ProjectBased on the feasibility study report the design capacity of the WWTP is 160000 m3 /t

and this capacity cannot meet the sewage volume discharged in the area ,therefore the WWTP

will operate in full load and the discharged effluent will be 160000 m3 /t.

Table 2-17 Effluent load of Jiangdon anqu WWTPProject Influent Effluent Removal Discharge Removal

(mg/L) rate (%) volume volume(mg/L)(td(t)

BOD5 120 < 30 2 75 4.8 14.4

CODcr 240 < 120 2 50 19.2 19.2

SS 150 < 30 > 80 4.8 19.2

NH3-N 30 < 25 4 0.8

TP < 1.0 > 75 0.16 0.48

According to the feasibility study report the discharged effluent of the WWTP will meet

the standard of Class II .The table 2-16 shows the total discharge of treated sewage has been

decreased greatly this is very important to the pollutant discharge volume control.

Wastewater generated by the staff of the plant is about 15 m3/d, which will be treated

directly in the WWTP.

Workers living wastewater directly discharge into the waste water treatment plant. In this

plant there are 70 workers whose wastewater discharge volume is 15 m3/d. the wastewater

volume is so small that it do little harm to the plant.

2.8.1.2 Solid Wastes of the WWTP

The solid wastes of the WWTP include dewatered sludge, fine and coarse grille dregs,

grit and scruff and living garbage.

The dewatered sludge comprises many organic elements, which can emit foul smell to

affected ambient air quality. It is easy to move with water to pollute the environment as it

consists of very fine particles.

Most of the fine and coarse grille dregs are solid block matters, which comprise of

inorganic and organic matters .The characters of them are similar to living garbage. The scruff

of sediment tanks will be absorbed by vacuum suck-cart to be disposed like substance in the

septic tanks.

According to the FSR the pollutants of the project area shown on the following table:

75

Ningbo Jiangdongnanqu WWTP & Sewerage Project

Table 2-19The Discharges and Way of Treatment of Pollutants in the

Operating Period

Type of pollutants Discharge Way of treatment

Effluent water 160,000m3 /d Drained into Fenghua River

Grille dregs 1.6t/d Sludge landfill

Grit 3.2t/d Sludge landfill

Sludge 296t/d Sludge landfill

Living garbage 0. 1t/d Unified treated at

destruction plant

Odor Drained unorganized

The sludge comprises of organic matters (over 50%), other components are earth

particles and other inorganic particles .The organic matters in the sludge are easy to

decomposed to emit foul smell to pollute environment. It is easy moved with water t pollute

surface water and ground water. The main components of the dregs of fine and thick grilles

are organic fibers including small pieces of wood, cloth and other organic fibers and small

plastic begs and etc. and in summer there are some residue of melon and fruit. Sink grit

comprises of large inorganic particles, mainly mud sand, stone and etc. The character of grit

in the thick grids is stable and not easy to decompose and emit foul smell.

2.8.1.3 Odor

The odor in this project will mainly come from thick and thin grids, grit sedimentation

tank, radial-flow initial sedimentation tank, aeration tank, radial-flow secondary

sedimentation tank, sludge dehydration pump house, pollution drainage opening, and sludge

landfill. It is mainly composed of H2S and NH3. The odor strength changes with seasons and

temperature: as in summer the temperature is high, the odor is stronger, while in winter the

temperature is low, the odor is less strong. According to the results of investigation on the

sewage treatment plant at Jiangdongbei District of Ningbo, the odor intensity at 80m away is

Based on the feasibility report the intensity of NH is 0.255kg/h and H2SO is 0.096kg/h.

2.8.1.4 Noise

The noise of the WWTP mainly comes from positions of the fan house, debater pumping

house, inlet pumping house, sludge pump well and etc, of which the fan house is the most

76

Ningbo Jiangdongnanqu WWTP & Sewerage Projectnoisy position. There are 8 fans in the fan house and sound level is 95 dB. The sound level of

dewater pumping house is 80 dB, inlet pumping house 75 dB, sludge pumping well 70 dB.

In addition, there is noise from the sewage-pumping house with sound level of 85 dB.

2.8.2 The analysis of the pollution sources during the operation

period

The main pollutants in the construction period are noise, dust, waste gases and water and

abandoned earth generated from the WWTP, pumping stations and sewerage networks.

2.8.2.1 Waste water

The main waste water sources are raining water, sewage from the construction site,

pilling slurry water and hydrocele on the construction site .The construction period will last

for 2 year and most of the builders will live in the construction site .The domestic sewage

from those people is also an important pollution source.

2.8.2.2 Waste gases

The main waste gases in the operation period are gases generated from construction machinesand exhausted gases .The main pollutants of exhausted gas include CO, nitrogen-oxygencompounds, hydrocarbons etc. To construct treatment tanks, roads and pipelines, landleveling and excavation will have to be encountered which, as a consequence, will damagevegetation in the plant area, expose surface soil and flying dust; during construction ofbuildings or structures, concrete or mortar mixing machines will send cement powder flying;on trunk roads to the construction site, because of additional vehicles needed to carryconstruction materials, the amount of traffic creating dust and loss of materials will increase;due to fuel consumption during engineering construction, waste gases or atmospherepollutants will be produced, including S02, N02, CO, and TSP.

2.8.2.3 Solid wastes

Solid wastes in the construction period mainly are building garbage, abandoned earth

and living garbage generated by the builders. It is estimated that 13000m 2houses will be

dismantled for the project. Generally the bricks in the dismantled houses can be reused, other

part will become construction garbage The construction n garbage is about 7150m3

The construction of the WWTP and pipeline networks will generate large amount of

77

Ningbo Jiangdongnanqu WWVTP & Sewerage Project

construction garbage. According to the survey 0.3 ton of construction garbage will be

generated with per m2 construction area The project will generate 2693.1 tons construction

garbage and mainly consists of broken tiles, gravel, brick, sand stones etc. building materials.

The abandoned earth in the construction period will be 53620m3according to calculation,

the construction period will last for 2 year and most of the builders will live in the

construction site, which will produce a certain amount of living garbage

2.8.2.4 Noises

During the construction period, the noise mainly engendered by various

kinds of constructional machines and trucks, which are shown in Table 2-18

Table 2-18 The tested values of noises engendered by constructionalmachines

The distance Thebetween the testing maximum

No. Type of machine Model site and the noise levelmachine tested LAeq (dB)

1_ TruckloaderZL40590(i)1 Truck loader ZL40 5 902 Truck loader ZL50 5 903 Bulldozer T140 5 864 Wheeled hydraulic W4-60C 5 84

excavator

5 Punched well drilling 22 1 87machine

6 The taper concrete JZC350 1 79mixer of reversed

materials exit

7 Transportation of 15 80-95vehicles

3 Survey of the Environment

3.1 Natural Environment

78


3.1.1 Geographical Position

Ningbo City is located at 121030'E-122°55'E and 29°31'N-30 000'N. it is in the

southeast seacoast of China and the east part of Ningshao Plain. It is close to the East Sea in

the east, facing Zhoushan Islands across the sea. It bounds Yin County in the south, Yuyao

City in the west and Cixi City in the northwest. The area of Ningbo City is 1033 km2.

The planned sewage treatment plant is located in Yin County, south to Sanjiangpian

district, 75m from Hangzhou-Ningbo expressway in the north and lOOm from Fenghua River

in the east. In the south of the plant boundary there is a village named linjia village and some

farmland. Some industrial enterprises are located in the east of the plant.

Ningzhong pumping station is located under the Fenghua River Bridge of Xingning

Road at the West Bank of Fenghua River and east of Ningbo Middle School. The other sides

are highways. As the pumping station is less than 50 m to the traffic trunk line, it is zoned as

Class 4 noise zone.

Wudongzha pumping station is located between Xingning Road of Jiangdong District

and Fenghua River and there are no environmental sensitivity points around the location. It is

zoned as Class 4 noise zone. Huangzhengnan Road pumping station is located at the bank of

Fenghus River in Duantang, Haishu District, and there is a frigorifico and several other

factories. It is zoned as Class 3 noise zone.

The WWTP is located at Yinzhou Center District, and the surround area of it are planned

as industrial zone belong to Class II zone for air quality zoning .The water quality of Fenghua

River in the section is planned as Class IV. The north side of it is Hangzhou to Ningbo

expressway .The boundary noise in the north side is Class 4 zone, and other sides are zoned as

Class 3.

3.1.2 Topography and Physiognomy

The topography of the area of Ningbo is higher in the southwest and lower in the

northeast .The Siming Mountain in the southwest is the extension of Tiantai Mountains. Haiji

Plain is in the north. Take Yangjiaojian, Hemudu as bound, Yaoci Plain is in the west and in

the east is Ningbo plain. Ningbo Plain is surrounded by mountains in the east, west, and south

side. The direction of mountains and plains is under the control of the Chinese geologic

79

Ningbo Jiangdongnanqu WWTP & Sewerage Projectstructure system of east north and north-northeast.

Sliming Mountain belongs to corroding structure and low mountain topography. The

highest peak in the mountain is 979m above the sea level. In the southeast is the extension of

Tiantai Mountain to the north and east, and the highest peak of Siming mountain is 656 m. In

the Northwest, from Yuyao to Xiepu, Zhenhai, the topography is upland extended to the

direction of east and west, which traverses between Yuyao and Cixi. The gentle slop upland

between Yong River and Xiaoxia River extends to Yong River estuary and Jinshan Mountain

in the direction of east and north. In the west side of Yong River estuary is coastal beach

physiognomy and in the east side is seawater erosion coast physiognomy and to form

deepwater seaport.

Ningbo plain is divided by Yong River and its two branches. Fenghua River and Yao

River into three areas i.e. the areas of Ningdong. Ningxi and Ningbei. Between the Ian River

and Tong River, the branches of Fenghua Rive, is Fenghua Plain. In the north of Yuwang

mountain is Beilun Plain. . Ningbo is situated in the Yong River valley, with flat topography;

numbers of rivers, broad maritime space and long coastal line, which is tending to stable. The

urban area is 3 m above sea level (Yellow Sea level)

the earthquake intensity-zoning map of China, the region' s earthquake intensity is

Grade 6.

Ihere are two types of soil-alluvial soil and paddy soil at the site of

the plant. The profile structure of alluvial soil consists of layers of surface

soil/subsoil/parent material or surface soil/subsoil/salt-containing parent

material. The depth of the soil layer is about 1 m. The soil is characterized

by a large plH variation, a loose texture, good aeration condition and water

permeability, a dampness regolith, and easiness of tillage. The parent material

of paddy soil is Ancient River or lake or lake-sea facies deposit, belongs to

factitiously cultivated soil.. The properties of the paddy soil are reflected

by moderate texture, proper pHl range, deep soil layer, hi.gh curing degree, no

special disturbance layer, and easiness for amendment and cultivation. It is

mainly used for planting food crops.

The soil. in this region is highly slaked and cultivated soil with high

productivity. It is mainly used for planting vegetables and rice crop.

80


The project area is planned to be a central area for economic development,

since economy in this district is already comparably well developed. The land

to be occupied by the sewage disposal plant has relatively high productivity,

and is mainly used for planting vegetable; thus its output value is rather high.

The area surrounding the plant is fairly flatter, thus is suitable for various

municipal construction. The soil is stable and highly resistant to erosion since

the land is flatter and the soil contains as high as 3% of organic matter.

3.1.3 Meteorology

Climate of Ningbo belongs to subtropical and monsoon one, its four seasons

are clear, and it is mild and humid with abundant rainfall, longer sunshine and

long frost-free period. Monsoon of winter and summer alternates obviously.

Annual average temperature: 16.9 0C;

Highest temperature: 38.7°C;

Lowest temperature: -8.8°C;

Annual rainfall: 1374.7mm;

Maximum rainfall per hour: 100.9mm

Annual average evaporation: 1320.1mm

Annual sunshine: 1800.4h

Annual average relevant humidity: 82%

Annual averages atmospheric pressure: 1016. 3hPa

Annual average wind velocity: 2.9m/s

Maximum wind velocity: 19.7m/s

Prevailing wind direction in winter: northwest

Prevailing wind direction in summer: south and southeast

Annual frost-free period: 228 days

Ground water

81


Total ground water resources in Ningbo City is 1.793 billion m3, of which,

0. 312 billion m3 occurs near surface area. It is mainly composed of void water

of friable rock, crack water of bedrock and mineral water, etc. Total annual

recharge to the underground water of the plain area is 0. 574 billion m3, including

0.536 billion m3 fresh water and 38 million m3 salty water.

There are two layers of deep void confined water in Ningbo and Fenghua River

plains, and the first layer is 50-70m deep, containing salty water, small amount

of fresh water occurring in Nanmen of the old urban district and Buzheng of Yin

County; the second layer occurs below 70'-100m, with 158 km2 fresh water body

around the center of the old urban district and an annual current water extraction

of 9.52 million m3.

3.1.4 River System

The network of watercourses is densely covered in the Center District of

Yin County, which is the site of the project. From ancient times to the present,

the network of watercourses is the most important water conservancy facilities

for floocl discharge, waterlogging drainage, freshwater storage and irrigation

in Yin County. The river system is the important water source for domestic and

industrial usage. The main river in the area is the Fenghua River, which is the

drainage-receiving river of the project. The inland water system includes the

Fenghua River, Nantang River, Zhongtang River and Qiantang River etc.

Fenghua River is one of the two big branches of Yong River. Its main stream

is Yin River and its branches include Shan River, Dong River and Ian River. The

length of the main stream is 96.1 km and the catchment area is 1,965 km2. The

average amount of flow-off is 1. 196xlO"' m3/yr. The width of the Fenghua River

varies between 130 220 m and the average depth is 5 m. Its average flux is 75

m7s with a maximum flood discharge of 5000 mi/s and a lowest flux of almost 0

m'/s in the dry season. In general, the dry season include November, December,

January and February, the level period is during April and May, and the high

flow season is during June, July, August, September and October.

The middle and down reaches of the Fenghua River is tidal river. The average

amount of flood tide flow for years is 789 million cubic meters and the average

82


amount of ebb is 10. 91 million cubic meters. The flow-off is only accounts for

5% 23% of the flood tide amount. According to the hydrologic data of Chenglangyan

Hydrographic Station, the average high tidal level of Fenghua River is 1. 14 m

with a highest level of 2.86 m (Yellow Sea level). The average low tidal level

is - 0.43 m a lowest level of - 1.53 m (Yellow Sea level). The average difference

between the high and the low tidal levels is 1. 57 m with a biggest difference

of 3. 14 m.

The Yong River system, whose main branches are Yuyao River and Fenghua River,

is one of the eight-largest river systems in Zhejiang Province. The confluence

of Yuyao River and Fenghua River is at Sanjiangkou in Ningbo. The river flow

toward northeast to East Sea by way of Zhenhai estuary. The length of the main

stream of Yong River is 26 km. The drainage area of Yong River is 5544 km2 and

the catchment area is 4, 254 km2. The total amount of runoff of Yong River is 3. 702

billion cubic meters. The width of the Yong River is 200>700 m and the average

width is 262 m. The average depth is 6 m; the most shallow depth is 2.8>3.0

m. The most flood discharge is 6,500 m3/s but the discharge sometime is nearly

0 m2/s at dry season. The amount of runoff is related to the precipitation.

The main functions of Yong Rive

Rare shipping, are flood discharge, waterlogging drainage and sewage

reception. Yong River is of irregular half-day-tide type. The highest tidal level

in 50 years is 4.96 m (Wusong water level). The average high tidal level in many

years is 2. 94 m. When the discharge of ebb tide is 290 690 m3/s in Sanjiangkou,

the amount of flow-off accounts for 10% 24% of discharge of ebb tide. The average

low tidal level is 1. 19 m, the biggest difference between the highest and the

lowest tidal level is 3.53 m. The average discharge of ebb tide in different

section of Yong River is listed in Table 3-1. The hydrologic data of Yong River

is presented as Table 3-2.

Table 3-1 Average discharge of ebb tide in different section of Yong River(m 3 /s)

Guaranteed rate Zhenhai Mix SanjiangkouP=10% 1200 970 690P=50% 820 640 460P=90% 450 370 290

Table 3-2 Discharge of tide at Zhenhai*Tidal difference frequency ( %) 90 75 50 25 10

83


Tidal difference (m) 0.85 1.20 1.65 2.20 2.65

Amount of rising tide (104 m3 ) 900 1,280 1,750 2,340 2,760

Duration of rising tide (nmin) 360 360 360 360 360

Discharge of rising tide (m3I/s) 416 592 810 1,083 1,277

Amount of ebb tide (104 m3 ) 1,040 1,420 1,900 2,520 2,920

Duration of ebb tide (min) 385 385 385 385 385

Discharge of ebb tide (m 3 /s) 450 614 822 1,091 1,260

Ratio of runoff and ebb tide ( %/) 7 5.4 4 3 2.6

*The tidal level is Wusong water level.

Table 3-3 Statistics of Concatenation Flux by Years of CenglangyanStation Near the Outfall

Average Accumulativevelocity of flow Average flux total of flow of

Year Date velocityMof flm w (m 3 /s ebbtide

( ni_ __ ___s_ _ 10 4 M 3 )

1989 1/9- 14/0 0.43 495 13370

30/8 - 3/9 0.69 883 148481990

4/9 - 11/9 0.66 785 17096

1985 22/8 - 23/8 0.36 419 5103

1988 16/6 - 21/6 0.47 566 6398

14/6 - 16/6 0.45 567 14596

1984 29/6 - 30/6 0.37 453 7413

24/7 - 26/7 0.37 443 9185

3.2 Survey of Environment

The land of Ningbo covers with abundant vegetation .The coverage of forest in the area

is 36.8%; the forest storage amounts to 7.35 M3. The forest vegetation belongs to evergreen

broadleaf type. There are about 10 species of plants for national protection Class II, like

ginkgo, Jinqian pine, eucommia, etc., 25 species of Class III national protection plants, likes

Tianzhu laurel and etc. The animal resource is very rich. There are about 950 species of

vertebrates, of which 69 species of beasts, 188 species of birds, 69 species of reptiles, 28

84

Ningbo Jiangdongnanqu WWTP & Sewerage Projectspecies of amphibians, and 502 species of fish. There are 9 species of Class I national

protection animals like pangolin, golden cat, and Yun leopard. And 40 species of Class II

national protection animals, like cowfish, otter. Zibet and etc.

Ningbo is situated in the eastern side of Ningshao Plain with enrichment land, and it is a

natural base for develops agriculture. The agriculture in the area is more advanced in the

country; it has been known, as a land flowing with milk and honey and it is an important

producer of grain, cotton, edible oil and aquatic products in Zhejiang Province and a lot of

local products such as peach, organ waxberry, and Chinese iris.

Due to the interference of already existed human activities in affected area

of the proposed plant, the wild animals are mainly those of small kinds who are

used to the influences of human beings like mouse; these is no wild animals

valuable for conservation.

Birds are mainly of aquatic kind that lives on Fenghua River, the numhers

are very less due to the reason of location is in the urban area.

3.3 Social Environment

3.3.1 Introduction to the city

Ningbo boasts a modern international seaport, a world-famous city of culture and history

and an economical hub of southern Changjiang Delta.Compared with the indictors for the

modern city standard, nearly half of the indicators of the city reach the standard of modern

city. Ningbo port is a rare deep water nature port and it support by the continent in the south

and screen by the Shoeshine islands in the north with characters of small waves, ice-free and

silt-free and superiority water temperature in the port area. As one of the four international

deep-water hinge ports in China, Ningbo port will be a hinge port of Shanghai international

transport center and large-scale ocean container transport center. Ningbo port will be

developed into the largest metal ore transport base, ocean container transport base of China;

the large Oil and liquid chemical industrial, transport and storage base, large scale coal and

bulk cargo transport and storage base, and tourists' attractions in the coastal line of Zhejang

province.

As the important trade port in the east China, and important industrial hase

in Yangtze Rive Delta and coastal regions, the economic position and advantages

85


of port is being promoted enhanced and extended continually and Ningbo has become

one of the 50 cities leading in the economic development of the nation and one

of the 40 cities with best investment environment in China. The GDP in 2000 was

RMB 117. 575 billion, the gross output value of agriculture was RMB 9.677 billion,

gross industrial output value was RMB60.041 billion (Price of the same year)

3.3.2 Territorial division and population

There are three county level cities and three counties and five districts

under the jurisdiction of Ningbo. The total land area of the city is 9365km2

of which the city proper is 1033km2. The population of the city in 2000 is 5. 4094

million of which, the city proper is 1.2405-million .The population and area

of three old established districts in the city proper is shown on table 3-4:

Table 3-4 Population and area of the established districts (1996)

District District area (km2 ) Population (10000)

Haishu 9.8 24

Jiangdong 16 18Jiangbei 6.9 22

Total 32.7 64

In the urban and township development of Ningbo, the priorities should be given to the

urban modernization, rural urbanization and integration of urban and rural areas and keep the

principles of the region economic planning " to develop port, prosper the urban, expand

three lines and over-all development" . Strengthen the economic relations of the center city

with the economy of surrounding areas and establish regional economic development

structure and new system of towns with the characters of reasonable resources allocation,

industries distribution and complementary of rural and urban superiorities.

3.3.3 Industry

Since the reform and opening to the outside world, Ningbo has been designated as the

key investment and development area by the state and Zhejiang Province and many new and

expansion projects have been built such as Zhenhai Power Plant, Beilun Power Plant, Port of

Ningbo, Zhenhai Refinery Company, Zhejiang Acrylic Fibers Factory, Baoxin Stainless Steel

86

Ningbo Jiangdongnanqu WWTP & Sewerage ProjectPlant, ABS Project and Zhonghua Paper Board Making and etc. A multi-sectors harmonized

industrial system has been come into being initially with light and textile industries.

machinery, petrochemical and power industries as the principle part and electronics, medicine

and pharmacy, metallurgy, building materials and industrial arts etc, as support sectors. In

2000 the industrial value-added has been reached to RMB 30.0570 billion by the

state-owned enterprises and Non-state-owned enterprises with annual sales income above

USD 5 million each .The taxes generated by the state-enterprises and state holding

companies totaled RMB 5.084 billion.

3.3.4 Agriculture

Ningbo is an important base for the production of grain, cotton, oil and aquatic products

in Zhejiang province .A diversity agricultural structure has been formed for a long time i.e.

give priority to planting whilst develop other farming, forestry and aquatic products In 2000

the gross output value of agriculture, forestry, animal husbandry and fishery reached RMB

14.84 billion. The main crops comprise rise (double harvest), cotton, oil plants, vegetable,

bamboo, tea, silkworm, medicinal materials and etc.

The total arable land of Ningbo is 3.54million Chinese mu (of which paddy field, 2.605

million mu, dry land. 935 thousand mu); forestry land is 4.89 million mus, mulberry field, 10.5

thousand mus, tea garden, 190 thousand-mu orchard, 480 thousand mu, and bamboo, 860

thousand mus.

3.3.5 Infrastructure

Since 1993, some new projects such as Dagan, Jiangdong and Meilin water works and

expansion projects like Nanjio Water Works, Jiangdong Water Works have been

completed .Up to 1999, the total water supply capacity reached 880000m3 /d with 7 water

works .See table 3-5 for details:

Table 3-5 Water Supply Capacity of Each Plant

Description Existing designed Water

capacity (m3 /d) sources Scope of water supply

River

Jangdong plant 350000 network in Sanjiangpian, Beilun andZhenhai areas

the E of Yin

87


. _________________ county

River

network inNanjiao plant 200000 the W of Sanjiangpian

Yin county

. Sanj'iangpian and BeilunMeiling plant 100000 Yao River anea

area

Beilun plant 150000 Reservoir Beilun area

RiverChicheng plant 25000 Ci City

network

Daqian plant 40000 Reservoir Beilun area

Zhenhai plant 15000 Reservoir Zhenhai area

At the same time some large-scale enterprises such as Zhenhai Oil Refinery & Chemical

Company. Zhenhai Power Plant and etc. have built their own self-provided water plants with

better facilities to take water from the sources for their large consumption of water and high

requirements to the reliability of water supply (see table 3-6).

Table 3-6 Large Self-Provided Water Plant Overview

Description Designed capacity Water sources( mr/d

Zhenhai oil refinery & Sanxipo reservoir and Eastern67200 River networks in of Yin

chemical companycounty

Jiaobai reservoir and WesternZhenhai power plant 25000

River networks of Yin County

Zhenhai port area 12000 Sanxipo reservoir

Xinluao reservoir and Qianmuao

Beilun power plant 30000rervi reservoir

Beilun port area 10000 Chengwan reservoir and Rivernetworks

OIl dokoil refinery&Oil dock of oil refinery & 3600 Qianmuao reservoir and River

chemistry company networks

88


The total length of the existing drainpipe line is 870 km of which sewage pipeline is

1140km, service area accounts for 81.22% and the total sewage discharge volume in the urban

area is about 400,000 m3/d, of which domestic sewage is 181thousand m3/d accounting for

45.3%. The city has 34 pump stations, including 19 for sewage, 6 for combined sewage and 9

for rainwater. The volume of the sewage discharged through the pumping stations accounts

for 46% of the total discharge volume of municipal pipeline networks; the rest flows by

gravity into the "three rivers " and inland rivers. Now the city is in a transitional period

from the combined sewage system to separate sewage system. Now the city has only one

sewage treatment plant with capacity of 100,000 m3/d, mainly treating sewage from northem

part of the city along Jiangdongbeilu and Zhongxinglu.

According to the "Urban Master Planning Compendium for the City of Ningbo

(2010-2020), In 2005 the total volume of reused sewage will account for 5% of the total

sewage for centralized treatment, and 20% in 2010, 50% in 2020.The sewage volume of the

central city (Sanjiangpian area, Zhenhaipan area and Beilunpian area) will be 84 t/d, of which

520000 t/d in Sanjiangpian area; in 2010, the sewage volume of the central city will be

1180000t/d, of which, 680000t/d in Sanjiangpian area in 2020, the sewage volume of the

central city will be 1640000t/d,of which 970000 t/d in Sanjiangpian area .According to the

planning ,there will be ten WWTPs in the central city , of which 3 in Sanjiangpian area

(Jiangdongnanqu WWTP, Jiangdongbeiqu WWTP, and Jiangbei WWTP), 1 in Zhenhai ,6 in

Beilun.

The municipal sewage will be collected in different areas for centralized treatment .The

design capacity will be controlled according to long term planning. Primary treatment will

be adopted in the near future and secondary treatment in the long term. The sewage treated

rate in 2005 will be 40%, 50% in 2010, and 70% in 2020.

3.3.6 Public utilities

89

Ningbo Jiangdongnanqu WWTP & Sewerage ProjectNingbo has been a traffic hinge in the east part of Zhejiang province. Since reform and

opening to the outside world of China, the input on the infrastructures has been increased

continually and a modern solid intermodal transport network has come into being.

Port: The port of Ningbo includes three port areas, i.e. Ningbo, Zhenhai and

Beilun .The annual handling capacity of the port is placed second in the mainland of China.

There are 24 berths of 10000 tonnage which includes a 200000 tonnage iron ore berth which

can berth 300000 tonnage ship concurrently, 250000 tonnage crude oil berth, 5 tonnage bulk

liquid chemical special berth and 3 berths can berth the fifth generation containers In 1999

the real throughput of the port was 9660 tons, containers, 601thousand TEU. On Nov. 8, 2000,

the real throughput of the port exceeded 100 million tons becoming the second largest port

with throughput of 100 million tons in China.

Airport: Ningbo Lishe Airport was open to navigation in 1990. There are more than 30

flight courses connect to more than 30 cities, like Beijing, Shanghai, Guangzhou, Shenzhen,

Hongkong and there are over 160 flights each week. The passengers transport volume in 1999

is 534thousand and freight volume is 9 thousand tons. At present, the phase II project for

expansion of the airport has been started up.

Railway: Hangzhou to Ningbo Railway links to the networks of the nation connecting

Jiangxi and Shanghai. In 1999 the passengers transport volume was 2.109 million and good

transport volume was 2.729 million tons.

Highway: A road network with rational overall arrangement and perfect structure has

been coming into being. The external roads: Shanghai-Hangzhou-Ningbo Expressway,

Hangzhou Bay Oversea Bridge, Ningbo - Jinhua First Grade Highway, Coastal National

Trunk Line. etc. Urban network includes speed roads, trunk roads, sub-trunk roads and branch

roads The "One hour traffic area " within the great city area has been established. In 1999

the passengers transport volume was 69.852million and good transport volume was

10, 118million tons.

3.4 Living Standard

Since the reform and opening to the outside world, the living standard of the residents

has been improved and on the way to reach the level of well- to-do life. The farmer' s living

standard is still in the level of dressing warmly and eating one' s fill and the infrastructure

are still lag behind. Based on survey in 1998 the disposal income the residents in the urban

90

Ningbo Jiangdongnanqu WWTP & Sewerage Projectarea was RMB 891land actual expend was RMB 9371 of which, consume expenses was

RMB 7111, food RMB 2961; Non-consume expenses was RMB 2259. Food consumption

accounts for 38% of the total consume expenses. From this point of view, the living standard

of the residents in Ningbo has already entered into the level of well to do.

The city of Ningbo has a sound sanitation management system and sanitation workers.

All the domestic garbage will be collected and 90% to be treated into harmless. Fenlin

Garbage Incineration has been built; Tap water has been used all over the city.

The sources of drinking water of Ningbo mainly are Yuyao River, Dongqian Lake,

which conform to the standard of Class II of surface water quality. The existing water plants

include Meilin Water Plant, Jiangdong Water Plant and Nanjao Water Plant.

Ningbo is a city with long history and famous culture heritage. It has the ancient library

with the longest history in China; Hemudu (Hemudu Cultural Relics), date back 7000 years

old; Baoguosi (Baoguo Temple), the oldest wooden structure construction of South of China,

and it also has the ancient celadon ware kiln in Shanglin Lake, Tashan Weir Irrigation Works

in ancient China, scenic spots in Xikou, Fenghua, Tiantong and Eryuwang Temples in the

ancient time and etc., There are now 40 hotels for international tourists, of which 17 star

hotels. In 1996 the reception of international tourists was 180877person /day and the tourism

foreign exchange revenue was USD 28.98 million.

3.5 Current Environmental Status

3.5.1 Water environment status

3.5.1.1 Assessment Method

Single factor standard index method is adopted for the evaluation. The following is the

details :

(1) The standard index of the single water quality evaluation factor I in J sampling

point.

91


Szj Cij/ C'j------------------------------------------------ (Formula 3-1)

In formula 3-1:

C-j-------The concentration of water quality evaluation factor I in j sampling point

mg/I;

C-j-------Evaluation standard of factor, mg/l;

(2)The standard index of DO:

_ DO, - DO, nl DOf -DOs DOj§DOs--------------------------- (formula 3-2)DOf-DOS

DO]

SDO j= 10-9 DOs DOj<DOs--------------------------- (formula 3-3)

DOf=468/ (31.6+T) ----------------------------------- (Formula 3-4)

In formula of 3-2, 3-3, 3-4:

DOf----concentration of saturation dissolved oxygen, mg/I:

DO,----Evaluation standard of dissolved oxygen , mg/I;

D01----concentration of dissolved oxygen in j sampling point , mg/I:

T------Water temperature, 'C.

(3)Standard index of PH:

7.0 - pHj

SPH, j 7.0- PH1 d PHj 7.0-------------------------------(Formula 3-5)

pHi -7.0

SPH,j pH S,, - 7. 0 PHJ>7.0------------------------------- (Formula 3-6)

A In formula 3-5, 3-6 'tP:

PHj------Ph value in sampling point

PH,d-----lower limit in evaluation standard

PH..--...up limit of evaluation standard .

3.5.1.2 Water Quality of Yong River and Fenghua River

Yong River water system composes Yong trunk stream, the two first grade branches of

Yao River and Fenghua River, of which Fanhau River is the receiving water body of

Jiangdongnaqu WWTP. There are many normal monitoring stations in Yong River water

system and the sections under monitoring have a total length of 216.5km. There are abundant

92

Ningbo Jiangdongnanqu WWTP & Sewerage Projectmonitoring data on water quality. Therefore, the EA will use the monitoring results in five

stations i.e. Fanshiliu section, and Zhenlangyan section of Fenghua River and Sanjiangkou

section of Yong River in the most recent 5 years for analysis instead of carrying out new

monitoring on Yong River and Fenghua River. See attached drawing 1 for the monitoring

points.

The standard of evaluation is "Surface Water Environment Quality

Standard" GB3838-2002 (the quality control target of the section of Fanshidu is Class III;

other four sections are Class IV) the evaluation method of single factor standard index is

adopted .See table 3-7 and 3-11 for the results.

Table 3-7 Yong River and Fenghua River Water Quality in 1997

Disso Ammo Volatile H

Secti Ived COD BD5O nia hydrox- Cyani Hg Pb Cd As vale Oilon Item PH oxyg M,< mg/ nitroge ybenze- de 1 I p g/L nt mg/L

en mg/L L n ne mg/L g/L g/L g/L CrpMg/L mg/L mggL

Samples 24 24 24 24 24 8 8 8 8 8 8 8 18

Max. Value 7.3 8.55 6.20 3.0 1.47 <0.002 <0.00 <0. <5. <0. <7 <4 0.26__________ 4 5 ___ ___ 4 05 0 50 < 4 02

Minimum 6.5 5 2.2 2.77 6 0.34 <0.002 <0.00 <0. <5. <0. <7 <4 <0.05value 9 6 4 05 0 50 < 4 <05

Mean value 7.0 7.01 4.10 1.9 0.84 <0.002 <0.00 <0. <5. <0. <7 <4 0.067.01 4 05 0 50____

Classificatiota n oan of mean / 11 _ _ _ _ _ _ It

valueStandard 0 0.68 04 0.84 1.2

index 8Max timesfor exceed 0 / 0.03 0 0.47 0 0 0 0 0 0 0 4.2standard x

Samples 24 24 24 24 24 8 8 8 8 8 8 8 18

Max. 744 7.63 6.59 5.0 1.67 <0.002 <4°° <0. 0 < s6. <7 <4 0.22

Minimum 6.7 1.30 4 15 1.5 0.37 <0.002 <0.00 <0. <5. <0 <7 <4 0.089 8 ~~~037 <.02 4 5 0 so<5< 00

5 ~~~~~7.1 2.6 <0.00 <0. <5. <0.= Mean value 5 32 5 60 1.23 <0.002 4<O 0 50 <7 <4 0.13804c 4 4 . . 5 _ _ _ _ _

- Classificatio5 n of mean I III 11 I IV I I _ I I TV

u value

Standard 0.0 0.56 0.4 0.82 0.276index 7 4 .608 .7

Max timesfor exceed / 0 0 0.11 0 0 0 0 0 0 0 0standard x

93


Samples 24 24 24 24 24 8 8 8 8 8 8 8 18

Max value. 7.6 7.62 4.53 6 3.99 0.0003 <0400 <0. <5. <0 9 <4 0.4400 6 4__ _ _ _ _ _

Mivnailmuem 67 2.18 2.68 0.7 0.97 <0.002 <040 <0. <5. <0. <7 <4 0.100value 4 ____8 4__ ___ ___ __ _ __ _ _

Mean value 7.2 4.45 3.56 2.6 2.00 0.002 <0400 <0. <5. <0. 4 <4 0.2233 _ _3 4_ _ _ 5

Classificatio xcen of mean IV ll I Exceed I I I _ _ I I IV

value ___

ew Stiandard 0.1 .762 0.356 .4 2.000 0.200 / / / 0.0 / 0.446.e index 53 38 -. 40

Max timesF for exceed 0 / 0 0 2.990 0 0 0 0 0 0 0 0

standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8 18

Max. 7.9 8.89 3.64 2.3 1.62 <0.002 <047 <0. <5. <0. <7 <4 0.2703 7 4_ _ _ _ _ _ _ _

Minimum 7.2 2.77 1.34 0.3 0.90 <0.002 <0.00 <0. <5. <0. <7 <4 <0.050___________ 3 0 04 05 0 50 _ _ _ _ _ _

Mean value A 5.88 2.84 1.2 1.24 <0.002 <4°° <0. 0 < 50< <7 <4 0.109___________ 4 74 5 0 0

Classification of mean I III Il I V I I I I I I I IV

valueII IIStandard 0.3 0.2

i Standexd 60 0.528 0.284 1.240 _ I / I I 0.218ine 6012

-i1a Max timesfor exceed 0 I 0 0 0.620 0 0 0 0 0 0 0 0

N standard x____

Samples 24 24 24 24 24 8 8 8 8 8 8 8 18

Max. 7.9 10.02 2.25 2.8 1.17 <0.002 <0400 <o0 <05 <0 <7 <4 0.1309 34 5 0 0

Minimum 7.2 2.65 0.64 0.4 0.38 <0.002 <0.00 <0. <5. <0. <7 <4 <0.0509 ___ 6 4 05 0 50

Mean value S 6.67 1.52 1.1 0.69 <0.002 <0400 <0. <5. <0 <7 <4 0.061

Classification of mean I II I I IV I I I I I I I IV

value___Standard 0.4 0.1

Siannddeax d 53 0.398 0.152 98 0.690 / _ _ - 0.122

Max timesfor exceed I / 0 0 0.170 0 0 0 0 0 0 0 0standard x

As shown in table 3-6 the section of Fanshidu of Fenghau River meets the standard of

Class IV water body set in "Surface Water Environment Quality Standard" . GB3838-2002

The main pollutant is oil with max exceeding times of 4.2 The section of Chenglangyan

conforms to Class IV water quality; section of Sanjiangkou is above Class V water body and

the main pollutant is ammonia nitrogen with max exceeding times of 1.24;the section of

Youshan conforms to Class IV water quality. There are no heavy metals exceeding the

94


standards.

The analysis shows that the most serious pollution section is Sanjiangkou, the next is

Zhangjiangan.

Table 3-8 Water Quality of Yong River and Fenghua River in 1998

Non.No volatDiss -ionif ile Hexa

Sect olve COD BO c hydr Cyan Hg Pb Cd As valenSect Item pH o M,y D5 amIde U U U t Cr

en mg/L ium benz mg/L g/L g/L g/L g/L I

mg/ mg/ e-ne g/LL L mg_L

Samples 24 24 24 24 24 8 8 8 8 8 8 8

Max. 774 7.83 6.17 368 0.01 <0.0 <0.00 <0. <5. <0. <7 <47 6 8 02 4 05 0 50 __

Minimum 6.8 3.28 3.50 1.0 0.00 <0.0 <0.00 <0. <5. <0. <7 <42 8 2 02 4 05 0 50

Mean value 7.1 2.2 0.00 <0.0 <0.00 <0. <5. <0.n C siMean value 8 5.29 4.43 0 8 02 4 05 0 50 <7 <4

e Classificatio __n of mean / 111 111 _ I _ _ I _ _ _

valueStandard 0.0 0.74 0.5

index 9 I .4I I I Max timesfor exceed 0 / 0 0 / 0 0 0 0 0 0 0standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8

Max. 7.5 4.54 7.32 9.1 0.04 <0.0 <0.00 <0. <5. <0. <7 <47 3 9 02 4 05 0 50 ______

Minimum 6.8 0.50 5.07 2.2 0.00 <0.0 <0.00 <0. <5. <0. <7 <47 8 2 02 4 05 0 50 ___

~ Mean value 1.94 6.7 95.4 0.02 <0.0 <0.00 <0. <5. <0. <7___________ I I 1 02 4 05 0 50_ _ _

Classificatio Excen of mean / ed IV IV I I I I I I I

value V

Stiandard 0.1 0.64 0.9index 6 I .4 0 / / / " "

Max timesfor exceed 0 / 0 0 0 0 0 0 0 0 0standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8

Max. 8.3 4.65 7. 10 0.06 <0.0 <0.00 <0. <5. <0 8 <40 ___96 6 02 4 05 0 50 8 <

0 ~~~7.0 1.9 0.00 <0.0 <0.00 <0. <5. <0.Minimum 0.48 3.88 4 8 02 4 00 < 5 0 <7 <4

7 6 4.9 0.03 <0.0 <0.00 <0. <5. <0.Mean value 1.76 5.19 4 <41 5 3 02 4 05 0 50 __

Classificatio Excenofmean / ed V III IV I I I I I I I

value

95


Standard 0.4 1.20 0.8 0 0 0 0 0 0.0index 07 3 0.519 25 / 40 /

Max times 0.8for exceed 0 / 0 27 0 0 0 0 0 0 0standard x _Samples 24 24 24 24 24 8 8 8 8 8 8 8

Max. 8.3 8.84 4.65 8.4 0.07 <0.0 <0.00 <0. <5. <0. <7 <46 1 8 02 4 05 0 50 < <

Minimum 1 1.65 1.31 0.5 0.04 <0.0 <0.00 <0. <5. <0. <7 <48 5 1 02 4 05 0 50

7.7 3 2.9 0.03 <0.0 <0.00 <0. <5. <0. <Mean value 4.91 3.00<7 4

5 3 3 02 4 05 0 50

:B Classificatio= n of mean T IV II II / I I I I I I I

N valueStandard 0.5 0.68 0.4index 00 7 0.300 88 I / / I / / I /

Max times 1.94 0 4for exceed 0 79 0 0 20 0 0 0 0 0 0standard x

v 24 24 24 24 24 8 8 8 8 8 8 8

Max. 8.0 8.95 3.87 3.8 0.05 <0.0 <0.00 <5. <0. <7 <48 3 0 02 4 05 0 50

Minimum 7.3 3.15 0.28 0.2 0.00 <0.0 <0.00 <0. <5. <0. <7 <49 1 3 5 02 4 05 0 50

c Mean value 7.7 8.48 2.15 1.4 0.01 <0.0 <0.00 <0. <5. <0. <7 <49 8 9 02 4 05 0 50

v Classificatioo n of mean / I iI I I I l I I I l l

value _ ____

Standard 0.5 0.10 0.2index 27 2 0.215 47 I l l l I I l I

Max times 1.98for exceed 0 3 0 0 / 0 0 0 0 0 0 0standard x

As the table shown that in 1998 the water quality of the section of Fanshidu of

Fenghua River conforms to Class III set in "Surface Water Environment Quality

Standard" GB3838-2002 ; the sections of Chenglangyan and Sanjiangkou exceed Class V

water body standard and the main pollutant is dissolved oxygen ;the sections of Zhangjiangan

and Youshan conform to the water standard of IV and the section of Youshan reaches the

standard of Class II .GB3838-2002 .0 No heavy metals exceed the standards The analysis

shows that the water pollution is more serious in the sections of Sanjiankou and

Chenglangyan. As the flow passes the Sanjiangkou to Zhangjiangan, with the reduction of

pollutants discharge and the self cleaning of the water body, the water quality is turning better

and the water quality reaches Class II as it reach the seaport of Youshan for the stronger

dilution ability.

96


Table 3-9 Yong River and Fenghua River water Quality in 1999

AmC mon

(U ~~~~~~~~~~ia SexavMonito DO BOD COD n Total. Pb Cd As alent Cyani

* ~~~~~~~~~BD irHg A ln.E ring pH mg/ Oil P p.pg/ p Cr de

° Dilate L mg/L mgL o mg/L L L g/ / dn pg/L~~~~~~~~i/

mgl

Level 7.06 5.54 0.163 2.88 3.85 1.22 0.134 / /

period __

Pollutio 0.03 3.26 0.72 0.65 1.22 0.67 / / / /n indexClassi fication

of I III IV I 11 IV III / / / /water

quality _Times

forexceed 0 2.26 0 0 0.22 0 I I / /standar

d

Wet 6.87 4.24 0.100 1.35 3.47 1.12 0.069season

Pollutio 0.13 2.00 0.34 0.58 1.12 0.35 /n indexClassificationwaterlof IV IV I 11 IV II l I I lwater

5~qualityTimes

forexceed 0 1 0 0 0.12 0 / I I /standar

d

seaso 7.35 7.54 0.093 1.64 4.56 0.28 0.172 <0.05 2.1 0.16 <7 <4 <0.004season

Pollutio 0.18 1.86 0.41 0.77 0.28 0.86 <0.00 0.04 0.03 <0.04 <0.08 0n index Classification

of / I IV I III II III I I I Iwater

qualityTimes

forexceed 0 0.86 0 0 0 0 0 0 0 0 0 0standar

Annualmean 7.09 5.77 0.119 1.96 3.96 0.87 0.125value

97


Classification

of / III IV I II III IIIwater

qualityLevel 7.26 0.89 0.365 4.68 6.44 1.82 0.333 / / /period I I I_I_I

Pollutio 0.13 0.73 0.78 0.64 1.21 1.11 / / I / / /n indexClassification Exce

of I ed Ill III N V / I / / / /

water Vqualitytimes

forexceed 0 0 0 0 0.21 0.11 / I I / / /standar

Wet 7.06 1.77 0.178 3.81 5.21 0.77 0.127seasonPollutio 0 03 0.356 0.64 0.52 0.51 0.42n indexClassification Exce

of / ed IV III ill III ill I I I / / /water V

quality__ _ _ __ _ _ _ _ __ _ _ _

: Timesfor

51J exceed 0 0 0 0 0 0 I I / / / /standar

d_ _

Dry 7.73 2.38 0.385 8.47 6.28 0.91 0.320 <0.05 1.9 0.14 <7 <4 <0.004season

Pollutio 0.37 0.77 1.41 0.63 0.61 1.07 <0.05 0.04 0.03 <0.07 <0.08 0n IndexClassification

of / V IV V N III V I I I I I Iwater

qualityTimes

forexceed 0 0 0.41 0 0 0.07 0 0 0 0 0 0standar

Annualmean 7.35 1.68 0.309 5.65 5.98 1.17 0.260value _

Classification Exce IV In i IV

of ed [ V A l VEwater

quality _

pLevel 7.13 3.78 0.247 3.51 5.68 1.50 0.191 I / /. period I I 9

98


Polluino 0.07 0494 0.585 0 568 1.00 0 637n indexClassification

of I IV IV III III IV II1waterqualityTimes

forexceed 0 0 0 0 0 0standar

Wet 7.19 2.49 0.208 4.10 4.79 1.86 0.192season

Pollutio 0.10 2.49 0.416 0.683 0.479 1.24 0.640n indexClassification

of I V IV IV III V IIIwater

qualityTimes

forexceed 0 0 0 0 0.24 0standar

d

Dry 7.62 3.42 0.245 8.10 6.68 1.07 0.342 <0.05 1.5 0.10 <7 <4 <0.004season

Pollutio 0.32 3.42 0.490 1.350 0.668 0.71 1.14 0.005 0.03 0.02 <0.07 <0.08 0n Index-Classification

of 12 Li Li 32 ,1 12 1O Li [ [2warderqualityTimes



Classification

of I ] [ [l 2 [2 [water

____ quality I___ __ _ _ __ __ _ __ _ __ _ _ __99 I I

99


Continuation Yong River and Fenghua River Water Quality 1999

Ammon

season~~~~~~~~~~~~~~a ea

Monito DO COD Tota Pbedxav nOil BOD 5 nitr Tota. Pb Cdg As alent yn

ringy pH mg/ M H ig/ pg deDate L ~~~~mg/L mgIL Mn oge [ g C

Date L ~~~~mg/L mgIL jgI L L pg/L Cn pigfL

0 ~~~~~~~~~~~mg/

Levelperiod 7.62 5.96 0.182 0.63 2.48 0.87 0.108

Pollutio n 0.31 0.364 0.105 0.250 0.58 0.360

index__ __

Classification

of I II IV I 11 III IIIwater

quality __ _ _ _ _ _ _ _ _ _

Tinmesfor

exceed 0 0 0 0 0 0standar

Wet 7.45 4.11 0.158 2.01 2.05 1.42 0.111seasonPolluti

on 0.23 4.11 0.316 0.335 0.021 0.95 0.370index

Classification

of I RI IV I 11 IV III- water

qualityTimes

forexceed 0 0 0 0 0 0

standar

Dry 7.99 5.80 0.212 5.48 2.57 0.76 0.279 <0.05 0.9 0.06 <7 <4 <0.004seasonPolluti 0.00

on 0.50 5.80 0.424 0.913 0.026 0.51 0.930 0.05 2 0.01 <0.07 <0.08 0

index2Classification

of I III IV IV II III IV I I I IwaterqualityTimesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0

standar

100



Classification

of Ii water

quality _

Level 7.86 7.94 0.121 0.59 1.91 0.43 0.064period _ _ __ _ _

Polluti 0.28on 0.43 7.94 0.242 0.098 0.019 7 0.213

indexClassification

of I I -

waterq ualitvTimes

forexceed 0 0 0 0 0 0standar

dWet 7.64 6.13 0.620 0.61 1.84 0.53 0.055

seasonPol luti 03

on 0.32 6.13 1.240 0.102 0.018 0.35 0.183index3

Classification

of I -

waterqualitv ___Times

forexceed 0 0 0 0 0 0stand ar

dDry 7.99 7.77 0.133 1.08 1.40 0.38 0.043 <0.05 1.1 0.14 <7 <4 <0.004

seasonPolluti 02 0.00 0.02

on 0.50 7.77 0.266 0.180 0.014 0.25 0.143 <0.05 2 8 <0.07 <0.08 0index __ __

Classification

of 7 C G _ _ bwaterquality _

Time

etxceed 0 0 0 0 0 0 0 0 0 0 0 0standar__


101


Classification

of / I I -

water_ _ _ q u a lity _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

102

Ningbo Jiangdongnanqu WWTP & Sewage Project

As table shown that in 1999, the section of Fanshidu of Fenghua River was Class

IV water quality set iC GBC8C8-2002; the maiC over staCdard poGGutaCt is oiG aCd the

water quaGity reached BGass IV staCdard iC GeveG, wet, aCd dry periods. fCd DO aCd

ammoCia CitrogeC GeveG aGso reached BGass IV staCdards iC GeveG aCd wet periods. The

sectioC oD BheCgGaCgyaC is the water body oD BGass V aCd maiC exceediCg staCdard

poGGutaCt is DOING aCd BOD5reacded the staCdard oD BGass V iC dry seasoC. This shows

that the water quaGity oD FeCghua River exceeded the staCdards iC diDDereCt degrees.

The quaGity oD YoCg River coCDorms to BGass IV oD GBC8C8-2002 staCdards iC geCeraG

but dissoGved oxygeC oD SaCjiaCgkou iC dry seasoC was iC BGass V aCd oiG iC YoushaC

sectioC is iC BGass V iC wet seasoC.

No heavy metals exceed the standards.

Table Yong River and Fenghua River Water Quality 2000

AmmMonito DO BOD COD onia SexavCyn

M nito Oil cal Total Hg Pb Cd As alent Cyani-5 ring pH mg/ 5 Mi, L deDt Lc mg/L nitro P ig/L yig/L ag/L l.ig L CrDate L ~~mg/L mgIL gen mgL L/

___ _____ ~~~~~~mg/L _ ___ _

LevelNo No No No No No

period 7.16 5.95 0.095 2.49 4.59 0.654 0.145 No No No No No NojtW] _ ~~~~~~~~~~~result result result result result result

Polluti No No No No No Noon 0.08 1.9 0.62 0.77 0.654 0.73 result result result result result result

index

Clagsification / I IV I III III III I I I I I 1

ofwater

qualityc Times

forexceed 0 0.9 0 0 0 0 0 0 0 0 0 0L1~standar

dWet 74 30400321 576 118020 No No No No No No

season 7.44 3.04 0.093 2.12 5.76 1.108 0.210 result result result result result resultPolluti No No No No No No

on 0.22 1.86 0.53 0.97 1.108 1.05 result result result result result resultindex ___

Classification

of / IV IV I III IV IV I I I I I Iwater

quality _

103


Timesfor

exceed 0 0.86 0 0 0.108 0.05 0 0 0 0 0 0

standard

Dry 6.98 7.51 0.114 2.22 6.37 0.865 0.150 0.02 1.13 0.11 4 2 2

seasonPolluti

on 0.02 2.28 0.56 1.07 0.865 0.75 0.002 0.02 0.02 0.02 0.04 0.001index __ _ _ _ _

Classification

of I T IV I IV I III I I I I I

waterquality__ _ __ _ _ _ _ _

Timesfor

exceed 0 1.28 0 0.07 0 0 0 0 0 0 0 0standar


Classification

of / III TV I Ii 111 IIIwater

_ quality I_I

Level 7.73 3.46 0.278 6.26 7.66 1.066 0.320 No No No No No No

period result result result result result result

Polluti No No No No No No

on 0.47 0.556 1.04 0.77 0.71 1.07 ru ru ru ru ru ru

index result result result result result result

Classification

of I IV IV V IV IV V I I I I I I

waterqUalitx'_____Times


dWet 77 354029 46 760 261030 No No No No No Nosea 7.73 3.54 0.279 4.65 7.60 2.651 0.390 result result result result result result


on 0.47 0.558 0.78 0.76 1.77 1.30 result result result result result resultindex

Class ification Exce

of I IV IV IN. 1\V ed V I I I I I Iwater

quality

104

Ningbo Jiangdongnanqu WWTP & Sewage ProjectTimes

forexceed 0 0 0 0 0.77 0.30 0 0 0 0 0 0standar

dDry 7.44 4.57 0.258 6.76 8.78 1.349 0.163 0.02 1.5 0.13 4 2 2

seasonPolluti

on 0.22 0.516 1.13 0.88 0.90 0.54 0.02 0.03 0.03 0.04 0.08 0.001Index

Classification

of / IV I V IV III I I I I 1 Iwater

quality___Times

forexceed 0 0 0.13 0 0 0 0 0 0 0 0 0standar

dAnnualmean 7.63 3.86 0.272 5.89 8.01 1.69 0.291value

C lassification

of I V IV/ IV/ IV V RIwater

__ _ quality__ ___ __ _ _ _

Level 7.72 3.54 0.410 5.57 6.73 1.779 0.413 No No No No No Noperiod 7 01 5 result result result result result resultPolluti No No No No No No

on 0.36 3.54 0.820 0.928 0.673 1.186 1.37 result result result result result resultindex

Classification

of I IV IV IV IV V V I I I 1 1 Iwater

qualityTimes

forexceed 0 0 0 0 0.186 0.37standar

V) dWet 7.59 3.26 0.412 3.83 4.41 1.606 0.378 No No No No No No

seOalslo7n . 3 result result result result result result

Polluti No No No No No Noon 0.29 3.26 0.824 0.766 0.441 1.071 1.260 result result result result result result

indexClassification

of I TV Al III III V V I I I I I Iwater

quality

105


Timesfor

exceed 0 0 0 0 0.071 0.26 0 0 0 0 0 0

standar

Dry 7.67 3.54 0,435 4 97 7.76 1.22 0.225 0. 02 1 0.05 4 2 2seasonPolluti

on 0.34 3.54 0.870 0.828 0.776 0.813 0.750 0.02 0.02 0.01 0.04 0.04 0.01

indexClassification

of I IV 1 1I III rv IV iV I IIwaterquality__ _ _ _ _ _

0 _ 0 0 0 0 0 0 0 0 0 0 0


Classification

of / IV IV I IVI V Vwater

quality

106


Continuation Yong River and Fenghuanjiang River Water Quality 2000MO ~~~~~~~~~Amm Sexav

o r° Monito DO BOD COD iacal Total Hg Pb cd As alent Cvani21 CI ~~~~~OilHg P cd A aln _ _ ring pH mg/ 5 MiL nitro P Lg/I deC n Date L m/.mg/I. mg/I. gen mgIL ~ i/L pg /g/ C

mgL _ _ _pg/I.

Level 7. .9018 14 .6 078003 No No No No No Noperiod 7.9 6.99 0.128 1.45 156 0.738 0.063 result result result result result resultPollutiNo N No N No o

ondett 0.45 6.99 0.256 0.242 0.016 0.492 0.210 result result result result result resultindex

Classification

of B El E I 3 .1l B7 LiwaterqualityTimes

forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar

dWet 77 424012 18 249 083005 No No No No No No

season 7.76 4.24 0.102 1.87 2.49 0.883 0.045 result result result result result resultPolluti ~~~ ~~~ ~~~ ~~~~~~~No No No No No No

:< on 0.38 4.24 0.204 0.312 0.025 0.589 0.150 result result result result result result.2 index

= Classification

N of E,B B El B B7 B B I

water

quality _

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

Dry 8.14 8.46 0.094 1.52 1.87 0.734 0.101 0.02 1 0.05 4 2 2seasonPolluti

on 0.57 8.46 0.188 0.253 0.019 0.489 0.337 0.02 0.002 0.01 0.04 0.04 0.01index _ _ _ _ _ _

Classification

of B Bl _1 B- B B0 ] B- B1 LI B] water

q uality _ _ _ _ __ _ __ _ __ _ __ _ __ _ __ _ _ _ __ _ __ _ __ _ ___107

107




Classification

of / 11 i I I 111 11water

quality _ .

Level 7.99 9.59 0.049 1.17 0.71 0.415 0.026 No No No No No Noperiod result result result result result resultPolluti No No No No No No

on 0.50 9.59 0.098 0.195 0.041 0.277 0.086 result result result result result resultindex

Classification

of _ I . 1 -1 '' .water

qualityTimes



seaston 7.91 5.71 0.059 0.52 0.91 0.428 0.015 result result result result result resultPol lut i No No No No No No- on 0.46 5.71 0.118 0.087 0.091 0.285 0.050 ru ru ru ru ru ru

index ~~~~~~~~~~~~~~~result result result result result resultindexClassification

of - 7 i 7 7 I watter

qualit _ _. __l r___

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

dDry 8.17 8.63 0.052 0.95 1.30 0.58 0.061 0.02 1 0.05 4 2 2

seasonPolluti

on 0.59 8.63 0.104 0.158 0.130 0.387 0.203 0.02 0.002 0.01 0.04 0.04 0.01index

Classification

of i Ii l l ; ! [- l l C b 3 33water

quality

108




Classification

of I lI I I 1 1water

quality I _ I _I _ I I

109


As table 3-9 shown that the water quality in the section of Fanshidu of Fenghua

River reaches Class IV GB 3838-2002. The main pollutant exceeded is oil. The water

quality reaches Class TV in level, wet and dry seasons. ln addition. COC mn reaches

Class IV in dry season and ammonia nitrogen and total P reaches Class TV in wet season.

The section of Chenglangyan is Class V water body and the main pollutant exceeded

is ammonia nitrogen, which exceeds Class V water body in wet season. This indicates

that the water quality of Fenghua River in 2000 exceeded the standard in general.

The water quality of Yong River in the section of Sanjiangkou is Class \V water body

GB 3838-2002; the main pollutants exceeded are ammonia nitrogen and total P, and in

level and wet seasons reached Class V standard .The water quality in the sections

of Zhangjiangan and Youshan conforms to the requirements of Class TV GB3838-2002 and

indicators exceeded in each water seasons.

Table Yong River and Fengh ujian g River Water Qu lity 2001Amm

Monito DO BOD COD al Total Sexav Cyaniring pH mc! Ol alHg Pb Cd As alent dt Date pH mL mg/L 5 nitro mg/L ~ ig/L ug/L l-ig/L Cr de

Date ~ ~ ~ moL m - m/L mgIL pigfLgen lI~~~~~~~~~g/L

Level 7.07 4.52 0.04 2.59 4.5 0.658 0.193 No No No No No Noperiod result result result result result resultPolluti No No No No No No

on 0.04 0.8 0.65 0.75 0.658 0.97 result result result result result resultindex _ _ _ _ _ _ _ _ _

Classification

of I 1V I I III Ill III I I I I I Iwvater

quality _ _ _ _ _ _

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

d _

Wet 69 37401625 413048027 No No No No No Noseason 6.93 3.74 0.136 2.52 4.13 0.438 0.217 result result result result result resultPolluti No No No No No No

on 0.07 2.72 0.63 0.68 0.438 1.09 result result result result result resultindex

Classification

of / IV TV I III 11 IV I I I I I Iwater

quality

110


Timesfor

exceed 0 1.72 0 0 0 0.09 0 0 0 0 0 0standar

dDry 7.11 5.41 0.153 2.11 3.38 0.509 0.235 0.02 1.75 0.05 4 2 2

seasonPolluti

on 0.06 3.06 0.53 0.57 0.509 1.18 0.002 0.04 0.01 0.02 0.04 0.001index

Classification

of I I1I IV I II III IV I I I I I IwaterqualityTimes

forexceed 0 2.06 0 0 0 0.18 0 0 0 0 0 0standar


Classification

of IV Rl I l 111 IVwater

- qualityLevel 7.65 3.45 0.073 S.S0 7.00 0.986 0.246 No No No No No Noperiod result result result result result resultPollutiNo N No N No o

on 0.33 0.146 0.92 0.70 0.66 0.82 reNsult reNsuolt reNsult reNsuolt reNsuolt reNsuoltindex _

Classification

of IV 1 \/ I\V I\ III 1\I I I I I I Iwater

qualityTimes

forexceed 0 0 0 0 0 0 0 0 0 0 0 0

standard _

Wet 71 333026 48 573 100020 No No No No No Nosealson 7.17 3.33 0.286 4.89 5.73 1.000 0.210 result result result result result resultPollutiNo N No N No o

index 0.09 0.572 0.82 057 067 070 result result result result result result

Classification

of I \/ Al TV III III IV I I I I I Iwater

quality


Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

dDry 7.72 3.43 0.195 4.32 4.76 0.928 0.161 0.02 1.13 0.05 4 2 2

seasonPolluti

on 0.36 0.390 0.72 0.48 0.62 0.54 0.02 0.02 0.01 0.04 0.04 0.001index

Classi fication

of I R' IV I \ II III IlI I I I Iwvater

qualityTimes



Classification

of R; IV IV III 111 I'Vwater

quality

Level 7.66 3.26 0.302 3.52 5.92 1.083 0.195 No No No No No Noperiod .__ ___ ___ ___ ___ result result result result result result

112


Polluti No No No No No Noon 0.33 3 26 0.604 0.587 0.592 0.722 0.650 result result result result result result

indexClassification

of O .O O C 7 7 7 r water

quality _ _ __ _ _ _ _ _ _ _ _

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

dwet

season 7.23 3.38 0.342 3.75 5.48 1.178 0.139 No No No No No NoscMseen 7.93 3.38 0 342 375 5 48 i 17R 0 i 39 result result result result result result


index

Classification

of 7z ;7 7 _ 1 7 7 7 ;.water

quality__ _ _ _ _ _ __ _ _ _ _ _

timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

Dry 7.47 3.41 0.150 3.9 4.37 1.032 0.130 0.02 1.44 0.05 4 2 2seasonPolluti

on 0.24 3.41 0.300 0.650 0.437 0.688 0.433 0.02 0.029 0.01 0.04 0.04 0.01index

Classification

of 7 7 -E 7 7 7water

qualityTimes



Classification

of / 7 E O C1 E lwater

quality I_____

113

Ningbo Jiangdongnanqu WWTP & Sewace Project

Continuation Yon River and Fenghua River Water Quality 2001Amm

Monito DO BOD COD ona TotalSea Cyani~~ ring PH m~~I oil al Hg, Pb Cd As alent d~~ Date ~~~~p mg/L nir L pg/L j.g/L [ig/L pig/L CrDat L mgL mc tL genX mg/ p g/ F

_en_ _ ~~~~~~mo/L_

*~~~ Level No No No No ~~~~~~~~~~~~~~~~~ No NoLevl 776 6.32 0036 121 4 711period 7result result result result result result

114


* Polluti No No No No No Noon 0.38 6.32 0.072 0.202 0.026 0.474 0.083 result result result result result result

index___Classification

of G 2 D G . G C G3water

qualityTimes


d

season 7.77 4.32 0.270 2.83 3.92 0.807 0.088 No No No No No Noseason 7.77 4.32 0.270 2.83 3.92 0.807 0.088 result result result result result result


indexClassification

of 21 water

qualityTimes


dDry 7.88 5.71 0.209 1.78 2.48 0.878 0.111 0.02 1 0.05 4 2 2

seasonPoll uti

on 0.44 5.71 0.418 0.890 0.025 0.585 0.370 0.02 0.002 0.01 0.04 0.04 0.01index

Classification

of C El, 5 L Cl 3 .- l water

qualityTimes



Classifi o 2 i 2 5cation El l

Level 7.91 8.W 0.084 0.61 1.29 0.35 0.019 No No No No No Noperiod 7 result result result result result result

onuti 0.46 8. 0.168 0.100 0.129 0.233 0.063 No No No No No Nooindex result result result result result result

115


Classification

of I II I 1 I II I 1 I 1 Iwaterquality___Times


Wet 7.88 5.33 0.257 1.84 2.24 0.457 0.019 No No No No No Noseason result result result result result resultPolluti No No No No No No

index 0.44 5.33 0.514 0.307 0224 0305 0063 result result result result result result

Classification

of I III AV I II II I I I I I Iwater

quality _ _ _ _ _ _ _

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0standar

dDry 8.00 6.97 0.197 1.51 1.67 0.553 0.045 0.02 1 0.04 4 2 2

seasonPolluti

on 0.5 6.97 0.394 0.252 0.167 0.369 0.150 0.02 0.002 0.008 0.04 0.04 0.01index

Classification

of I if IV I I III 11 I I I I I Iwater

Timesfor

exceed 0 0 0 0 0 0 0 0 0 0 0 0stand ar

d _


Classification

of I IV I I il 11water

q u a lity' _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ __ _ _ _ _ _ _ _ _ _ _

116

Ningbo Jiangdongnanqu WWTP & Sewage ProjectAs Table 3-10 shown, in 2001 the water quality in the section of Fanshidu of Fenghua River

reached Class IV standard, 3838-2002. The main exceeded indicators are DO, oil and total P; in

general the water quality of the section of Chenglangyan and Yong River conforms to Class IV

3939-2002 standard. There is no indicator exceeding the standard in all seasons too. T

Table 3-1 and 3-5 shown the pollution pollutants average variations monitored at the five

points in recent five years.

8 0. mgml

6-

4 _ DO

2 - BOD5

1997w 1998* 19999 2O000 T 2001 F

Figure 3-1 The Mean Value of Main Pollutants Variations in the Section of Fanshidu in

Recent Five Years

117


4±4!: mg/i

o~~~~~~~~~~~~~~D

6

4 - B _ _ _ 3D5

1997•T1 1998•1 1999•11 2000•1 200149

Figure 3-2The Mean Values of the Main Pollutants Variations in the Section of Zhenglangyan

in Recent Five Years

6 g

3 DO-- -_ =

2 __ -t t ----- __ BOD5

0 ----__ _ _ _ _ _ _ _ _

Figure 3-3 The Mean Value of the Main Pollutants Variations in the Section of Sanjiangkou in

Recent Five Years

_ _ ____ _ _ _--

8-I-


Figure 3-4 The Mean Value of the Main Pollutants Variations in the Section of Zhangjiangan

in Recent Five Years

I10

8) - i _ _ _

6

BOD5

Figure 3-3 The Mean Value of the Main Pollutants Variations in the Section of Youshan in

Recent Five Years

The Monitoring data in the recent five years show that no heavy metals exceeded the standards.

The main pollution indicators affected the water quality of Yong River and Fenghua River is

ammonia nitrogen, total P, oil. DO and BOD5

The analysis of the pollution concentration of each section shows that the highest pollution

119

Ningbo Jiangdongnanqu WWvTP & Sewage Project

concentration is in the section of Sanjiangkou, Chenglangyan and Zhangjiangan taking the second

place. The concentration in the section of Fanshidu and Youshan is the lowest. The reason is that

the area of the Shanjiangkou section is the industrial and living district of Ningbo and the sewage

discharge is larger to pollute the water while the section of Fanhsidu is in the up reaches of Yong

River and Youshan located at the seaport, the dilution ability of the water is higher to reduce the

pollutant concentration.

It is necessary to pay attention to the situation that more and more industrial enterprises set up

along the up reaches of Fenghua River, and the industrial and domestic sewage has been increased.

The water quality in the section of Fanshidu tends to deteriorate and the water quality of Fenghua

River is not optimism .The water quality in the section of Chenglangyan and Sanjiangkou of Yong

River turns better due to the operation of Jiandongbeiqu WWTP and some pollution enterprises

have been relocated from the bank of Yong River. The pollutants discharge has been reduced

resulting in the better change of the water quality. As the section of Youshan is in the seaport with

high dilutioni power so there are little variations for the water quality.

3.5.1.3 Water Quality of Inland River

a) Water quality monitoring data in recent 2 years

Jingdongnanqu WWTP is located at Yingzhou District, which is densely covered with

networks of inland rivers, which are mainly consisted of Nantang River, Qiantang River and

Zhongtang, river .As the monitoring reports in recent years shown that the water quality of the

river network of the district is class III-V. There are 9 monitoring points to be used for routine

monitoring with abundant data collected .The data in 2000 and 2001 are used for this EIA to

analyze the present status of the water quality in the river network of Yingzhou District. The

locations of the monitoring points are shown in attached Figure 2.

The evaluation standard is "Surface Water Environment Quality Standard" GB3838-2002

(the control target in each point is Class III); the method of Single Factor Standard Indictors is

adopted .The evaluation and monitoring results are shown in table 3-12 and 3-13.

2. Monitoring results and evaluation of the EIA

1)

1) Monitoring Point

East side of the small bridge

120


2) Monitoring item

pH, DO, oil BOD, CODM,, CODcr, Ammonia Nitrogen , total , fecal coliform bacteria

negative ion surfactant .

3) Monitoring Time and Frequency

Two days, from 7/6/02---8/6/02;once in the morning and once in the afternoon.

4) Evaluation Standard

GB3838-2002 "Environmental Quality Standard For Surface Water" Class III

5) Evaluation Methodology:

Single factor standard indicator method

6) Monitoring and Evaluation Results:

See table 3-14

Table 3-12 Internal Rivers of Ying County in2000

Amm

a Monito BOD COD ona ev CyaniOil al Hg Pb Cd As alent- ring pH O Mn C de

Datemg/L Mn nitro jag/L p.g/L pg/I. pg/L Cr dC) ~~~~~g/L mg/L ge gI

Level 7.20 0.08 1.83 3.46 1.07 No No No No No Noperiod . result result result result result result

Polluti No No No No No Noon 0.10 1.6 0.46 0.58 1.07 result result result result result result

indexClassification

of / IV I 11 IV I I I I I Iwater

quality: Times

:~forc exceed 0 0.6 0 0 0.07 0 0 0 0 0 0C standar

.) d

Wet 7.26 0.21 2.77 5.79 0.36 No No No No No Noseason . result result result result result result


indexClassification

of / IV I III 11 I I I I I Iwater

I quality I _I _I

121


Timesfor

exceed 0 3.2 0 0 0 0 0 0 0 0 0standar

d

Dry 6.77 0.608 2.51 4.31 1.09 0.02 2 0.25 4 2 2seasonPolluti

on 0.77 12.2 0.63 0.72 1.09 0.2 0.04 0.05 0.08 0.04 0.01index

Classification

of / V I III i I I l I I Iwater

quality ITimes

forexceed 0 11. 0 0 0.09 0 0 0 0 0 0standar

Annualmean 7.08 0.299 2.37 4.52 0.84value

Class ification

of I I I III IIIwater

quality Level 7.9 01 .3 61 .9 No No No No No Noperiod 7.09 0.16 4.33 6.17 139 result result result result result result


i ndexC lass ification

o f I IV/ IV J V\! \i I I I I I IwaterqualitvTimes

forexceed 0 2.2 0.08 0.03 0.39 0 0 0 0 0 0

standar

Wet 7.44 0.52 4.47 8.04 2.01 No No No No No Noseason result result result result result result


indexClassification Exce

of I V RI IV ed I I I I I

water V

122


Timesfor

exceed 0 9.4 0.12 0.34 1.01 0 0 0 0 0 0standar


on 0.09 16.7 0.98 0.89 2.53 0.2 0.04 0.05 0.08 0.04 0.01index

Classifi Excecation / V III III ed I I I I I I

V

Timesfor

exceed 0 15.7 0 0 1.53 0 0 0 0 0 0standar

dAnnualmean 7.24 0.505 4.24 6.51 1.98value

Classifi / V rv IV Ication _

Lvl7.07 0.34 5.35 7.07 3.56 No o No o No operiod result result result result result resultPolluti No No No No No No

ondex 0.04 6.8 1.34 1 .18 S 3.56 result result result result result resultindex ____

Classification excee

of R IV IV IV ding I I I I I Iwater V

quality

123


Times - -

forexceed 0 5.8 0.34 0.18 2.56 0 0 0 0 0 0standar

dWet 7.24 0.43 5.62 8.47 3.45 No No No No No No

season result result result result result resultPolluti No No No No No No

on 0.12 8.6 1 .41 1.41 3.45 No o No o No oindex result result result result result result

Classification

of / 1\V T IV Ln V I I I I I Iwater

qualityTimes



on 0.89 23 1.12 1.20 6.40 0.2 0.04 0.05 0.08 0.04 0.01index

Classifi Exce Excecation ~~ed V V ed I I I I

cationl _ !X

Exceed 0 22 0.12 0.20 5.40 0 0 0 0 0 0times


Classification Exce

of / v Ir Ri edwater V

qualit1

124


Continuation Internal Rivers Water Quality of Ying CountyAmm

. Monito BOD COD oniac Sexav CyaniOil al Hg Pb Cd As alent Cynring pH 5 M dec > Date p H mgfL mg nitro pg/L ltg/L ig/L pig/L Cr

Lvl7.21 0.11 4.51 7.36 0.60 No No No No No Noperiod 7.21 result result result result result resultPolluti No No No No No No

on 0.11 2.2 1.13 1.23 0.60 result result result result result resultindex

Classification

of / IV TV IV III I I I I I Iwater

qualityTimes

forexceed 0 1.2 0.13 0.23 0 0 0 0 0 0 0standar


season result result result result result result


indexClassification

of / IV III TV 11 I I I I I Iwater

Ca qualityTimes

forexceed 0 3.8 0 0.27 0.31 0 0 0 0 0 0standar

dDry 7.00 0.434 1.64 3.29 0.87 0.02 2 0.25 4 2 2

seasonPolluti

on 0 8.7 0.41 0.55 0.87 0.2 0.04 0.05 0.08 0.04 0.01index

Classification

of / IV I II III I I I I I Iwater

qualityTimes

forexceed 0 7.7 0 0 0.87 0 0 0 0 0 0standar


125

Ningbo Jiangdongnanqu WWTP & Sewaoe Project

Classification

of / IV III TV II1water

_ qualityLevel 7.30 0.15 5.06 8.28 3.11 No No No No No No

7.30e0.15r5.06o8.28 3.11 result result result result result result


on 0d15 3 1.27 1.38 3.11 result result result result result resultindex

Classification Exce

of I 1\ IV 1\1 ed I I I I 1

water VqualityTimes

forexceed 0 2 0.27 0.38 2.11 0 0 0 0 0 0

standar

Wet 7.74 0.48 4 82 7.81 1.02 No No No No No No

season result result result result result result


on 0.37 9.6 1.21 1.30 1.02 result result result result result resultin dlex __ ___ _ _ __ _ _

Classification

o of / IV V IV 1\ I I I I 1 I_ water

qualityTimes

forexceed 0 7.2 0.21 0.30 0.02 0 0 0 0 0 0

standard

Dry 7.28 0.452 6.22 7.63 2.54 0.02 2 0.25 4 2 2

seasonPolluuti

on 0.14 9.1 1.56 1.27 2.54 0.2 0.04 0.05 0.08 0.04 0.01


of I I\ V IV ed I I I 1 1 Iwater V

qualityTimes

forexceed 0 8.1 0.56 0.27 1.54 0 0 0 0 0 0

standar

Annualmean 7.44 0.361 5.37 7.91 2.22value _

126


Classification Exce

of / IV NV IV edwater V

qualityLevel 7.45 0.09 1.70 5.86 2.50 No No No No No No

7pe1od result result result result result result

Polluti No No No No No Noon 0d23 1.8 0.43 0.98 2.50 result result result result result result


of I V I III ed I I I I l

water VqualityTimes


Wet 7.36 0.24 3.73 7.04 0.81 No No No No No Noseason 7 result result result result result result


indexClassification

of Nv III Il III I I I I I Iwater

quality~< Times

forexceed 0 3.8 0 0.17 0 0 0 0 0 0 0standar

dDry 6.79 0.747 2.27 5.96 0.69 0.02 2 0.25 4 2 2

seasonPolluti

on 0.79 14.9 0.57 0.99 0.69 0.2 0.04 0.05 0.08 0.04 0.01index

Classification

of I V I III III I I I I I Iwater

qualityITimes

forexceed 0 13.9 0 0 0 0 0 0 0 0 0standar.d


127


Classification

of I RIV A." I\Vwater

quality

Continuation The internal River Water Quality of Yin CountyAmm

Monito Oil BOD COD onia Sexav Cyaniring p H 5 nitro Ho Pb Cd A alent de

_ _ Date pH mg/L mg/L gen ,g/ ,ug ,ug ,ug/L g/L LE_ mg/L __

Level 7.78 0.18 5.52 8.85 1.48 No No No No No Noperiod result result result result result result


indexClassification

of I\! IV IV LV I I I I I I

waterqualityTimes



season .22 result result result result result result

Polluti No No No No No Noion 0.40 6 0.99 1.30 0.22 result result result result result resultindex

O Classification

of I IV III I\ 11 I I I I I Iw ater

quality _ _ _ _ _ _ _ _ _

Timesfor

exceed 0 5 0 0.30 0 0 0 0 0 0 0standar

d

Dry 7.21 0.540 3.64 8.44 1.16 0.02 2 0.25 4 2 2seas on__ _ __ _ _ _

Pollution 0.11 10.8 0.91 1.41 1.16 0.2 0.04 0.05 0.08 0.04 0.01

indexClassification

of I V III lV IV I I I I I Iwaterquality | _

128


Timesfor

exceed 0 9.8 0 0.41 0.16 0 0 0 0 0 0standar


Classifi / IV IV IV IIIcation

Level 7.40 0.16 2.28 4.97 0.94 No No No No No Noperiod result result result result result resultPolluti

on 0.20 3.2 0.57 0.83 0.94 No No No No No Noindex . result result result result result result

Classification

of / I\/ I III III I I I I lwater

qualityITimes

forexceed 0 2.2 0 0 0 0 0 0 0 0 0standar


Ponut 013 6.6 0.91 0.98 0.7 No No No No No Noindex _ result result result result result result

Classification

of / IV III III III I l l l ls water

quality ITimes

forexceed 0 5.6 0 0 0 0 0 0 0 0 0standar

d


on 0.02 15.2 0.46 0.35 1.29 0.2 0.04 0.05 0.08 0.04 0.01index

Classification

of / V I 11 IV I I I l I lwater

quality____Times


129



Classifi I\ _ Ill 1 cation

As table 1-11 shown, in 2000 the water quality of the sections of Chenjiao, Tongpenpu,

Xianzhong, Meixu and Wuxiang is Class IV water bodies and the section of Shigan is Class V

and the sections of Panhuo and Wangchun exceed the standard of Class V. The main pollutants

exceeded are oil: CODMn. BOD 5 d ammonia nitrogen .No heavy metals exceed the standard in the

monitoring items.

Table 3-13 The internal River of Ying County 2001

BOD AmmMonito Oil BOD COD onAa Sexav Cyani

5 ~ ~ ito Hg Pb Cd As alent Cyn_ ring PH Mg/ Mgg mgl nitro _L Cr de

Da e L Mg mgmL gen 'p'-/L j.t/L CL~~m/

NoLvl 7.34 0.28 3.163 5.20 2.15 No No No No No reu

period result result result result result result

~~ Polluti ~~~~~~~~~No No No No No N_ on 0.17 5.6 0.79 0.R7 2.15 No N o N o resul

on 0.17x 5.6 0.9 0.87 2.15 result result result result result rindex

cation Exceof / IV III III ed I I I I I I

water Vquality I

130


Timesfor

exceed 0 4.6 0 0 1.15 0 0 0 0 0 0stand ar

d

Wet No No No No No resulseason 7.03 0.16 4.84 4.73 0.9 result result result result result t

t

Polluti Noon 0.02 3.2 1.21 0.79 0.9 No No No No No resul

index result result result result result t

Classification

of / IV IV JII III I l I I I Iwater

qualityTimes

forexceed 0 2.5 0.21 0 0 0 0 0 0 0 0standar

d _


on 0.14 1.8 0.71 0.81 2.48 0.2 0.1 0.1 0.08 0.04 0.01index

Classification Exce

of / IV I III ed I I I I I Iwater V

qualityTimes



Classification

of / TV III III Vwater

quality NoNo

Level 7.62 0.33 11.49 10.4 2.24 No No No No No lperiod . . result result result result result resu

t

Polluti NoNo No No No No

on 0.31 6.6 2.87 1.73 2.24 result result result result result resulindex t

131


Classification Exce Exce

of R IV ed V ed I I I I I Iwater V V

quality _ _ _ _ _ _

Timesfor

exceed 0 5.6 1.87 0.73 1.24 0 0 0 0 0 0standar

d

Wet . 0.25 9.16 8.94 2.42 No No No No No resulseason result result result result result

Polluti No N o N o Non 0.19 5 2.29 1.49 2.42 reul reul reul reul reul resul

index _ _ resu It resull resull resul t rcsult t

Classification Exce

of / IV V IV ed l I I I I Iwater V

qualityTimes

forexceed 0 4 1.29 0.49 1.42 0 0 0 0 0 0standar

dDry 7.25 0.21 3.70 4.33 2.02 0.02 5 0.5 4 2 2

seasonPolluti

on 0.23 4.2 0.93 0.72 2.02 0.2 0.1 0.1 0.08 0.04 0.01index

Classification Exce

of I f\ lIII III ed I I I I I Iwater V

qual itvTimes

forexceed 0 3.2 0 0 1.02 0 0 0 0 0 0stand ar

Annualmean 7.42 0.26 8.12 7.89 2.23value _

Classification Exce

of / IV V IV edwater V

qualityNo

~ Level 7.52 0.42 13.4 15.85 12.90 No N o N o resulperiod result result result result result

t

132

Ningbo Jiangdongnanqu WWTP & Sewage Project____

Polluti Noon 0.26 8.4 3.35 2.64 12.90 No No No No No eu

index result result result result result reu____________t

Classification Exce Exce Exce

of I IV ed ed ed I I I water V V V

quality ___

Timesfor

exceed 0 7.4 2.35 1.64 11.90 0 0 0 0 0 0standar


7.0e.3a1.5o0.n33 result result result result result result

Polluti No No No No No Noon 0.15 6 3.56 1.77 3.53 result result result result result result

indexClassification Exce Exce

of AlI ed V ed I I I I I Iwater V V

quality____Times


d


on 0.18 4.4 1.92 1.88 5.33 0.2 0.1 0.1 0.08 0.04 0.01index ____

Class ification Exce

of I 1\V V V ed I I I I I Iwvater V

qualityITimes



Class ification Exce Exce

of I IV ed V edwater V V

Iquality I_I_I_I

133


Continuation The Internal River Water Qualty of Yin County 2001Amm

Monito BOD COD onia Sexav Cyanirin PH oil 5 M1 nto Ho P Cd As alent d

Date mL mg/L mgL genio

g g/L g g / gLevel 7.46 0.155 6.56 7.34 0.32 No No No No No Noperiod 7.46 0.155 6.56 7.34 0.32 result result result result result result


index ___

Classification

of / I\ V RVf I I I I I I Iwaterquality _

Timesfor

exceed 0 2.1 0.64 0.22 0.32 0 0 0 0 0 0standar

dWet 7.47 0 93 5.2 8.S8 0.86 No No No No No No

season .2 .2 result result result result result result


indexClassification

of / Ti RI IV III I I 1 I I l) water-S quality

,G Timesfor

exceed 0 3.6 0.30 0.43 0.86 0 0 0 0 0 0

standar


on 0.81 3.2 0.93 0.83 0.66 0.2 0.1 0.1 0.08 0.04 0.01

indexClassification

of IV III III III I I I I Iwater

quality .Times

forexceed 0 2.2 0 0 0.66 0 0 0 0 0 0

standar


134


Waterqualityclassifi IV IV I\J IIIcationLevel 7.14 0.35 9.86 11.8 5.79 No No No No No Noperiod result result result result result resultPolluti _

on 0.07 7 2.47 1.97 5.79 No No No No No Noindex result result result result result result

Classification Exce

of / IV V V ed l l I I I Iwater V

qualityITimes


Wet 7.00 0.15 7.31 7.91 2.25 No No No No No Noseason result result result result result resultPolluti No No No No No No

on 0 3 1.83 1.32 2.25 result result result result result resultindex

Classification Exce

of R IV V IV ed I I I I l

water VqualityTimes

forexceed 0 2 0.83 0 1.25 0 0 0 0 0 0standar

dDry 7.13 0.18 7.20 8.68 2.24 0.02 5 0.5 4 2 2

seasonPolluti

on 0.07 3.6 1.80 1.45 2.24 0.2 0.1 0.1 0.08 0.04 0.01index

Classification Exce

of IV V RI ed I I I I I Iwater V

qualityIExceedstandar 0 2.6 0.80 0.45 1.24 0 0 0 0 0 0d timesAnnualmean 7.09 0.23 8.12 9.46 3.43value

Classification Exce

of IV V IV edwater V

qualityLevel 7.02 0.175 6.81 8.78 1.39 No No No No No No____ period _____ ______ ______ ______ ______ result result result result result result

135


Pollution 0.01 3.5 1.70 1.46 1.39 No No No No No No

index result result result result result resultClassification

of R I V I\ i I I I I I Iwater

qualityTimes

forexceed 0 2.5 0 0.46 0.39 0 0 0 0 0 0standar


Pon 010 2.4 1.97 1.34 1.56 No No No No No Noindex result result result result result result

Classification

of I I\ V IV V I I 1 I Iwater

quality _Times


dDry 7.02 0.11 6.29 8.16 2.48 0.02 5 0.5 4 2 2

seasonPolluti

on 0.01 2.2 1.57 1.36 2.48 0.2 0.1 0.1 0.08 0.04 0.01index

Classification Exce

of 1\1 V IV ed I I I I I Iwater V

q ual itv _ _ __ _ _ _ _ _ _ _

Timesfor

exceed 0 1.2 0.57 0.36 1.48 0 0 0 0 0 0standar


Classification Exce

of I IV V IV edwater V

quality

136


Continuation The Internal River Water Quality of in County 2001Amm

o Monito Oil BOD COD oniac Sexav Cyani* ~~~~~~ ~~~ ~~al Hg Pb Cd As alent Cyn

t5 ring PH Mg/ 5 Mn nir g r de_ niig P g gL m tro [ig/L lig/L 1g L ,ig/L Cr eO ) Date L mg/L mgIL gnpg/L

Level 7.16 0.25 6.93 10.5 1.53 No No No No No Noperiod result result result result result result


indexClassification

of / IV V V V I I I I I Iwater

quality .Times


Wet 7.39 0.21 3.79 8.37 1.72 No No No No No Noseason result result result result result resultPolluti No No No No No No

on 0.20 4.2 0.95 1.40 1.72 result result result result result resultindex r r r r r r

Classification

of IV III IV V I I I I I I2 water

qualityTimes

forexceed 0 3.2 0 0.40 0.72 0 0 0 0. 0 0standar

dDry 7.07 0.17 4.72 8.53 2.03 0.02 5 0.5 4 2 2

seasonPolluti

on 0.04 3.4 1.18 1.42 2.03 0.2 0.1 0.1 0.08 0.04 0.01index

Classification Exce

of / IV IV IV ed I I I 1 1 1water V

qualityExceedstandar 0 2.4 0.18 0.42 1.03 0 0 0 0 0 0d timesAnnualmean 7.21 0.21 5.15 9.13 1.76value

137


Classification

of I IV RI' Al Vwater

quality

Level 7.4 02 .5 56 .3 No No No No No Noperiod 7.34_ 0.20 4 85 5 61 1.13 result result result result result result


indexClassification

of A lV IV III IV I I I I I TwaterqualityTimes

forexceed 0 3 0.21 0 0.13 0 0 0 0 0 0standar


Pollutn No No No No No Noon 0.10 4.6 1.10 1.15 de.x result result result result result result

indexClassification

of' I \ IV IV 1\ I I I I I Iwater

qualityItimest for

exceed 0 3.6 0.10 0.15 0.05 0 0 0 0 0 0standar


on 0.89 4 0.85 0.90 0.67 0.2 0.1 0.1 0.08 0.04 0.01index _

Classifi / 1 II II I I I I I I

cation _Times

forexceed 0 3 0 0 0 0 0 0 0 0 0standar


classification

of A IV RV III IIIwater

quality

138


As table 3-12 shown that the water quality of the river network of Yinzhou District is as

following: Wuxiang Class IV; Chenjiap and Meixu Class V; Shigan, Wangchun, Tonepenpu,

Xianzhong and Panhuo above Class V. The main pollutants exceeded are BOD 5. CODcr and

ammonia nitrogen of which the pollutants of ammonia nitrogen exceeds Class V in all tidal periods

and sections except for the sections of Wuxiang and Tongpenpu No heavy metals exceed the

standard.

The comprehensive analysis with the data of 2000 and 2001 shows the water quality in 2001

dropped down in comparison with the data in 2000, of which the water quality in the sections of

Chenjiao and Meixu in 2000 was Class IV but Class V in 2001 and the water quality of Tongpenpu,

Xianzhong and Shigan was turned into Class V. This shows the trend of deteriorating of the water

quality in Yinxian district due to the economic booming and increased population to cause the

discharge of industrial and domestic sewage increased continually

Table 3-14 Monitoring and Evaluation Results for the River in the East Side

AmmDO COD CDI BOD Total Fecal onia

.2 Monitoringg pH DO Cr COD,,, B T coliform Nitro Oil LASdate pgH mg/i. mg/LL mg/L mg/Lmg mg/i. clusteriL gen

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ~~~~mg/L

a.m 7.0 4.85 65.9 13.9 7.36 0.478 9.2X 103 0.50 0.10 0.286.7 I

p.m 7.0 7.88 72.2 14.2 4.63 0.472 1.6 X 104 0.31 0.09 0.23U~~~~~~~~~~~~

6. a.m 6.6 4.90 52.5 18.6 4.16 0.550 5.4 X 103 0.30 0.16 0.20

q 8 p.m 8.20 51.7 17.7 4.31 0.544 5.4X 103 0.36 0.22 0.23U~~~~~

average 648 6.46 60.6 16.1 5.12 0.511 9.0 X 103 0.37 0.14 0.24

(U classificatio> casit abov above aboven of water ' V V fv V III1 V IV

qualityE pollution 0.8 4 3.03 2.68 1.28 2.555 0.9 0.37 2.8 1.2

Exceedstandard 0 / 2.03 1.68 0.28 1.555 0 0 1.8 0.2

times

139


As table 3-13 shown that the river is Class V water body and the main pollutants exceeded the

standard are CODcr, CODMfl, BOD5 total P, oil and LAS, The exceeding times are

2.03,2.68,0.28,1.8and 1.2. The pollution indicator analysis shows that the main pollutants of the

small river are CODcr, CODM and total P The pollution of the river is caused by narrow

watercourse, small capacity of water environment and domestic sewage discharged directly into the

river.

3.5.1.4 Current Sediment Status of Fenghua River and Yong River

The Monitoring Center of Ningbo Municipality conducts monitoring to Yongjinag River and

FenghuanJiang River once in every other 5 years. The monitoring stations are located at Fanshidu

and Chenglangyan along the Fenghua River and Sanjiangkou. Zhangjiangan and Youshan along

Yongjiang River. The most recent available data in 1998 are used in this analysis. See attached

figure 2 for the monitoring points.

"The Control Standard for pollutants in Agro-sludge" is adopted in the EIA and evaluation

method is single factor standard index method. . The evaluation results of the sediment is shown in

table 3-15:

Table 3-15 Current Status of the Sediment of Yong River and Fenghua

River (unit: mg/kg)

MonitoMecToaring Items r Cu Total Cr As

stations

Sampl 1 1 1 1 1 1e

Fanshi Monitodu ring 0.262 40.98 192.41 24.44 0.190 6.18

valuePi 0.017 0.082 0.192 0.024 0.010 0.082

Chengl Sampl 1 1 1 1 1 1angyan es

Monito 0.372 56.64 260.54 26.76 0.057 7.98ring

140


Pi 0.025 0.113 0.260 0.027 0.003 0.106Sampl 1 1 1 1 1 1

esSankia Monito 0.195 41.67 159.82 22.6 0.137 8.03

ngkou ringPi 0.013 0.083 0.160 0.023 0.007 0.107

Sampl 1 1 1 1 1 1Zhangj es

ZhangJ Monito 0.123 32.46 165.46 18.30 0.140 9.58iangan ring

Pi 0.008 0.065 0.165 0.018 0.007 0.128Sampl 1 1 1 1 1 1

es

VounsMonitoYouns ring 0.221 38.72 152.82 19.30 0.024 8.16han value

Pi 0.015 0.077 0.153 0.018 0.001 0.109Standard value 15 500 1000 1000 20 75

The sediment quality of Yongjiang River and Fenghuajiang River is conform with limited

value prescribed in "Control Standard for pollutants in Agro-sludge" GB4284-84The analysis on

the data from each monitoring points shows that the concentration of heavy metals in the sediment

in the sections of Fanshidu and Chenglangyan is higher than that in the sections of Yong River

points. This is shown that the sediment pollution in Fenghua River is more serious than that in

Yong River.

3.5.2 Ambient Air

3.5.2.1 Assessment scope

500 m from the WWTP

1) Monitoring Points Setup

It is located at the eastern side of the WWTP.

2) Monitoring Items

SO> NO 2, TSP. NH3 , H2S0

3) Monitoring Method

According to the technical criterions of environment monitoring

141


4) Monitoring time and frequency

For SO2and NO2 at least 18 hours a day for sampling, TSP at least 12 hours a day for

sampling. NI3and H2 S are monitored one time value and each monitoring time is under 1 hour, and

the monitoring will last for 5 days.

5) Monitoring results

See table for details.

Table 3-16 Air Environment Monitoring Status (unit mg/m3)Sampling SO2 NO2 NH3 H2S TSP

time

6 A 8 El 0.004 0.007 0.126 <0.003 0.103

6 A 9 F 0.011 <0.002 0.961 0.003 0.208

6 A 10 H 0.009 0.025 0.102 0.005 0.222

6 1 11 H 0.013 0.024 0.104 0.003 0.099

6 S 12 R <0.003 <0.002 0.031 <0.003 0.118

See table for related parameters of meteorology

Table :3-17 Meteorology Factor Monitoring Results

Sampling Temperatu Air Windtime re C hpressure direction Weather

time re ~~hPa

8/6/02 28 1008.0 NNE Fine9/6/02 30 1006.0 NW Fine10/6/02 29 1007.0 NNE Fine

11/6/02 31 1008.0 WNW Fine12/6/02 32 1007.0 WNW Fine

3.5.2.2 The Current Status of Ambient Air Assessment

1) EvaluaFion MeFhod

The singe facFor sFandard indicFor meFhod and exceeding raFio are used for Fhe

evaluaFion The definiFion of Ii is:

142

Ningbo Jiangdongnanqu WWTP & Sewage Projectli=Ci/Coi

In formula: Ci---Current monitoring value of certain pollutant

Coi---Standard value of assessment for certain pollutant factor

Ii) lmeans exceeding the standard otherwise means meet the standard

2) Evaluation Results

See table 3-18 for details:

Table 3-18 Assessment of Results of Current Monitoring Status

Item Sampling time Mean value Max Standardexceeding index

timesSO2 Daily mean 0.008 0 0.053

valueNO2 Daily mean 0.012 0 1.000

valueTSP Daily mean 0.150 0 0.500

_ _ _ _ _ _ _ _ _ _ _ _ _v a lu e _ _ _ _ _ _ _

H2S Hour value 0.003 0 0.300NH3 Hour value 0.265 3.8 1.325

The current status of ambient air is sum up like this:

1) S02

The concentration of daily mean value in all area is smaller; the max value is 0.013mg/m 30oiiY

accounting for 8.7% of Class II of the air standard.

2) NO2

The daily concentration of NO 2 is under the Class II air standard. The max concentration is

0.025mg/m3 accounitinig for 20.8% of Class II air standard.

3) TSP

The max daily concentration value of TSP is 0.222-mg/m3 accounts for 74% of the standard value

without exceeding Class II standard.

4) H2 S

The max hourly concentration of H2S in the project is 0.005mg/mi3 accounting for 50% of the

standard value without exceeding the limit value set in the regulation of "The Maximum

Permissible Concentration for Pollutants in the Air of Residential District "

5) NH3

143


The hourly concentration of NH3I- exceeds the standard in all areas. The maximum value is

0.961mg/m3 and the exceeding times are 3.8 times.

3.5.3 Acoustic Environment

3.5.3.1 The Assessment scope

200 meters from the boundary of the WWTP and 50 meter from the pumping stations

3.5.3.2 Monitoring of the current status of the Acoustic environment

1) Monitoring points

The monitoring points are set up in the south. west, north of the WWTP and in the east of

WWTP the monitoring point is located between the plant and the industrial zone The monitoring

points have been set up in 1 m from boundary of Ningzhong pumping station, Wudongzha pumping

station Huanchengnanlu pumping station.

2) Monitoring, Items

Equivalent sound level Leq (A), once on the daytime and at night

3) Monitoring Method

Based on "Urban Area Noise Measuring Method " (GBtT14623-93)

4) Monitor-ing Results

See following table 3-19,3-20 for details:

Table 3-19 Noise Monitoring results for Jiangdongnanqu WWTP (Unit

LAeq dB)

ots East South West North Middle

Daytime 58.3 47.9 47.2 54.8 49.6Nighttime 46.5 48.6 47.45 51.4 47.7

According to statistics the vehicle flux is 654V/h at daytime and 74 v/h at nighttime.

Table 3-20 Monitoring results for pumping stations and plant boundary

144


(unit : LAeq dB)

Yudongzha Ningbo MiddlePumpingzhtatin School Pumping South Beltway

Time Pumping station Station Pumping StationNoise source 80.1 80.7 89.0

Plant boundary 65.3 59.8 57.3noise (daytime)Plant boundary 63.5 59.9 56.6noise (nighttime)

3.5.3.3 Current Status Assessment of Acoustic Environment

As the monitoring result shown that the noise in the east, south, west and middle of the WWTP

does not exceed the standard of Class III set in the "Urban Area Noise Environment Standard" .

The north of the plant is near the expressway and the noise here does not exceed Class IV standard.

The noise of the pumping stations reaches the standards in the daytime and exceeds the limited

value of 55 dB at night, of which the standard exceeds in Wudongzha pumping station and South

Huanzhengnan St. Due to noise of pump and water discharge. The noise pollution of Ningzhong

is due to the opening windows of pump house and pumping noise. .

3.6 Ecological Environment

The WWTP is located in the center area of Yingzhou district in northwest of the aggradations

basin of Ningbo with a large area of sea facies aggradations layer .The topography is flat with large

coverage of water system .It is a typical water network area in the south of China The total area of

the rivers in the area is 82.95 ha accounting for 2.7% of the total land area.

There are two types of soil in the project site i.e. alluvial soil and paddy soil.

The profile structure of alluvial soil consists of layers of surface soil, subsoil,

parent material or surface soil, subsoil and parent material with salt content. The

depth of the soil layer is about 1 m. The soil is characterized by a large pH variation,

loose with good ventilation and permeability, a dampness regolith, and easiness of

tillage. The parent material of paddy soil is ancient river or lake or lake-sea facies

deposit, belongs to factitiously cultivated soil with moderate texture, proper pl-l

145


range, deep soil layer, high curing degree, no special obstacle layer, and easiness

for amendment and cultivation. The soil in the area is high degree vegetable soil

with high productivity, it is mainly used for planting grain crops and industria]

crops such as Chinese iris, rapeseed, melon, orange, green-stuff, grass seed and etc.

As the area is greatly influenced by human activities, wild animals are mainly

little ones, such as rats, etc., so no protection measure shall be considered for

them. Birds are mainly waterfowls over Fenghua River, but seldom seen in the urban

area.

'I'he project area is planned to be a central area for economic development, since

economy in this district is already comparably well developed. The land to be

occupied by the project is the land with relatively high productivity. The area

surrounding the plant is fairly flat, which is suitable for various municipal

constructions. The soil is stable and highly resistant to erosion since the land is

flat and the soil contains as high as 3% of' organic matter.

The site of the WWTP covers the cultivated land and residential area.

It has gone shot of the fishery resources in Yong River and Fenghua River in recent

years due to the water pollution and there are less manpower breed aquatics on the

river.

Current Status Survey on Industrial Pollution Sources Around

'I'he main assessment of the EIA is water environmental assessment so the survey

is conducted in the service area to the present and planned discharges of industrial

sewage .'I'he range of the survey includes the sections of Fanshidu of Fenghua River

and Zhenhai estuary of Yong River .The results of the survey are shown in Table

3-21,3-22,3-23.

146


Table 3-21 Main pollutants discharged into Yong River in the EIA range(Unit: tla)

Hex CaC Tot Tot0 No Enterprises Aare Waste CODc ad Cya ppC Zin al alNo Enterprises ~a water r chrno pe c nick chr

ome ens r el ome

Ningbo Cigarette Jian 327001 Factory gdo 0

ng

2 Ningbo Jufeng Jian2 Chemiicals Co. Ltd. gdo 54900

Jian 12592 0.00 0.00 0.0 0.00 0.00 0.003 7815 Factory of PLA gdo 8 3 2 05 1 1 4

Ningbo Oriental Port Jian 27700 14.694 electrochem-istry Co., gdo 0 7

Ltd. ng

Ningbo Plastic Co., JianLtd. gdo 46412

6 Ningbo Plastic and Jian 36300 0.029 0.02Plating Factory gbei .0 4

7 Ningbo Hengrun Jian 13000Plastic Co., Ltd. gbei 0Ningbo Modern Jian 50036

8 Building materials gbei 3Co., Ltd.

Zhongce Dynamical Jian 140209 Mechanical and Ja 42

Electronic Co., Ltd. gbei 0

10 Ningbo Tongda Plastic Jian 14900 13.15Mechanical Co., Ltd. gbei 0 0Ningbo Aimeke Valve Jian 35000

Co., Ltd. gbeilVMingxin Chemical Jian 13400

12 Mechanical Co., Ltd/ gbei 0

13 Ningbo Yuejin Jian 40600Qiangiao Co., Ltd. gbei

14 Ningbo Mingxi Jian 12210 1.700 0.0

147


Electrons Co., Ltd. gbei 0 06 = =-

15 Ningbo Dongnanxi Jian 45000____ Malt Co., ,Ltd. gbei __ __

Ningbo Mingda Yin16 Nnb nga zho 8640016 Dyeing Co.,Ltd zh 860

Ningbo Xinyang Yin 4050017 Textile Co., Ltd. zo 0 4.

U

Ningbo Mingfeng Yn1260018 Knitting Co., Ltd. Zho 0

Ningbo Haimeng Yn1980019 Industrial Co., Ltd. zho 0 8.28

Table 3-22 Pollutants Discharged into Fenghua River in Service Area ofJiangdongnaqu WWTP

(Unit: t/a)

Wast Hexa Tot Totae COD d cyanid copp zin al

Wate cr chro e er c nick chror me el me

Ningbo1 Changfeng Jiangd 49200 24.35

Thermoelectric ong 0 4ity Co., Ltd.

Ningbo

2 Jinzhong Jiangd 50000 2.480Season Food ong

Co., Ltd.3 Ningbo No. 1 Jiangd 43200 3.110

Woolen Plant ongNingbo Jag 80

4 Shuangyuan Jiangd 18500 2.171Co,. Ltd. ong 0

Ningbo Fan Jiangd 34800Co., Ltd. ong

6 Ningbo Water Jiangd 135506 -Meter Stock ong 0

148


Co., Ltd. I I IIIT 1Ningbo

7 Rusheng Jiangd 67000Industrial Co., ong

Ltd.Ningbo

8 Dongmu New Jiangd 10040 0.460Materials ong 0

Stock Co., Ltd. _____ _ _ _

Ningbo9 Yunqiang Fine Jiangd 3220 0.003 0.007 0.00 0.00

Machine Co., ong 9 8___ ~Ltd. _ _ _ _

10 Ningbo Milk Haishu 99000 6.440Co.

TCC Ningbo 14800 10.3611 Vintage Wine Haishu 0 0

Co., LtdNingbo 15136 15.13

12 Renfeng Cloth Haishu 0 6Plant

Ningbo Yaning13 Printing Co., Haishu 33000

L td. _ _ __ _ _ _ _ _

Ningbo No 114 Pharmaceutical Haishu 60000

___ ~Plant _ _ __ _ _

Ningbo Lihua15 Pharmaceutical Haishu 77000 5.220

PlantNingbo Shenle

16 Electric Haishu 35500 8.100Engineering

Alloy Co., Ltd.

Ningbo Kangji 16080 0.0317 Stainless Steel Haishu 0 0.123

Co., Ltd.Ningbo Xinluo

18 Electrical Haishu 19000Appliance Co., Hasu 0

Ltd. 019 ~Niingbo

19 Ningbo Haishu 47000 2.760Xingrong I I I I I I I I 4

149


ElectricalAppliance Co.,

Ltd. __ _Ningbo Albeisi

20 Electrons Co., Haishu 90000Ltd. - _

NingboChinese

21 Traditional Haishu 15000 34.88Medicine 0 0

PharmaceuticalPlant _

Zhonghua 87368 538.122 Paper Board Haishu 98 93

C o., Ltd. _ _ _ _ _ _ _ _ _ _ _ _

23 Ningbo Yiming Haishu 65000W ine Co., Ltd. _______ _______

Ningbo Bulijie Yinzho 81000 76.9524 Knitting Group 0 0

Co., Ltd.Ningbo Jia

25 Dyeing and Yinzho 40500 28.35finishing u 0 0Co.,_,Ltd. _

Yingxian

26 Zhenxing Yinzho 41800 8.370Thread Strap uDyeing Plant _ _

Yingxian27 KXinxing Yinzho 40500 3.200

27 Knitting 400320BleachingFactory _

28 Ningbo Yak Yinzho 27000 162.0Paper Co., Ltd. u 00 _

29 Ningbo Darong Yinzho 27000 18.09Food Co., Ltd. u 0 _

NingboJinsheng Yinzho 31.36

30 Woolen u 94500 0Factory _

31 Ningbo Liyang Yinzho 13500 16.2Dyeing and u 0 _

150


Finishing Co.,_ _ _ ~L td . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

32 Ningbo Jinshi Yinzho 23300 116.5| Beer Co., Ltd. u 00 | * i l l _ _

Table 3-23 Main Planed Pollutants to be Discharged into Yong River andFengha River

ReceivingNo. Enterprises Areas Waste water (t/d) Water

Body

I Phase I of Ningbo Weike Beilu District 8889.67 YongIndustrial Park River

Ningbo Jiandongbeiqu Jiangdong 10000 YongWWTP District 30000-0River

Ningbo Anna Garment Yingzhou Fenghua3 Complement Materials District 2000 River

Co. LtdNingbo Younger Yingzhou Fenghua

4 Sino-Japan Textile Co., District 3529 RiverLtd. District River

5 Ningbo Younger Knitting Yingzhou 4246 FenghuaCo., Ltd. District River

Ningbo Yike Garment Yingzhou Fenghua6 Complement Materials District 890 River

Plant ______________

Note: The waste water of from No 4, 5 items above will be combined and then to be connected

with the domestic water of Younger Garment Town (1350t/d), and the sewage will be discharged

into Fenghua River after being treated in the sewage treatment station with a sewage treatment

capacity of 1 lOOOt/d.

151

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA

4 Anticipated Environment Impacts and

Prevention and Abatement Measures

4.1 Environmental impacts projection and prevention

and abatement measures for surface water

4.1.1 The Environment impact of surface water in the

construction stage

4.1.1.1 Environmental Impact Analysis of the Surface Water

The sewage to be generated in the construction period mainly is sewage, rain water and

slurry water from the construction site The construction ranges over areas of Jiangdong

District. Haishu District, Yingchou District .A large area will be affected by the project.

There will be a certain impact on the ecological condition of the water area of Fenghua

River due to the construction of river crossings and outfall. . The construction will stir the

water body to move the sediment and cause the increase of ss and pollutants so as to

deteriorate the water quality of the water body to affect the ecological environment of the

river. But this kind of impact is small and limited. Besides this the oil leaking of construction

equipment may affect the water body and the leaked oil is difficult to degradation.

The domestic sewage in the construction period is also an important pollution source due

to the construction scale, range and people working for the project.

4.1.1.2 The Pollution of Surface Water and Measures for PreventionAbatement

1. The rain and sewage, piling slurry water and hydrocele in the site should be collected

and discharged into Fenghua River after sedimentation disposal .. The temporary living

facilities, eateries, oil isolating tanks, toilets, septic tanks should be built. The wastewater

from the eatery should be sent to oil isolating tanks and then treated in the septic tank with

152


other domestic water together to reach Class II standard prescribed in "Comprehensive

Standard for Sewage Discharge" and then to be discharged into Fenghua River. Sewage

discharging to the inland rivers should be forbidden.

b) The builders in pipeline construction should try to use the existing living

facilities near the construction site.

3, Strengthen management of the construction site to keep construction site flat and the

slope of the stack of earthwork should be leveled off .Tree and grass planting should be done

as soon as the construction finished.

4, The rational schemes should be chosen for the construction of river crossings and

outfalls to reduce excavation of the sediment to the great extent . Strengthen maintenance of

the construction equipment to check up construction equipment before using to avoid the

incidents of oil leaking and others.

4.1.2 The projection of the environmental impact on surface

water in operation stage and measures for prevention and

abatement

Jiangdongnanqu WWTP is located at Jiangdong District, Ningbo, to the south of

Hangzhou to Ningbo expressway, to the east of Fenghau River. The sewage discharge

capacity in the phase is 160000m3 /d with sewerage. The spare construction land is reserved

for the final capacity of 400000m 3/d. (See attached figure for the location of the outfall).

4.1.2.1 Projection of pollutants to be discharged

The design influent water quality of Jiangdongnaqu WWTP is as follows:

BOD5 120mg/L

CODcr 240 mgAL

SS 150 mg/L

NH3-N 30 mg/L

TP 4 mg/L

The effluent water quality is set according to Class II prescribed in " Integrated

Standard for Sewage Discharge" GB 8978-1996

BOD5 <,30mg/L

CODcr S 120 mg/L

153


SS •30 mg/L

NH3-N •25 mg/L

TP • 1.Omg/L

The pollutants to be discharged .can are calculated on the above data. (See Table 4-1 for

details).

Table 4-1 Pollutants Discharge Volume in Jiangdongna u WWTPFixed number of year by 2006-2010

planning

Projected sewage discharge 16(lOOOOt/d)

Original sewage CODcr 240water quality BOD5 120

(mg/l)effluent discharged CODcr 120

quality BOD5 30(mg/l)

Discharged volume CODcr 38.4of pollutants in BOD5 19.2original sewage

(tld)Discharged volume CODcr 19.4

of pollutants in BOD5 4.8discharged effluent

(t/d)

4.1 .2.2 The Mathematical Model and Verification

1. Mathematical model introduction

According to the full tide hydrology and watercourses characteristics and the

requirements of the department in charge of environmental protection on tail water discharged

from the outfall of the WWTP, the water flow and quality model of two-dimensional

non-constant flow is adopted. . As for the pollutants existing in the wastewater may influence

the basic movement of the flow, the answers can be extracted separately from vertical

two-dimensional flow field and pollutant concentration field.

1) Mathematical model of water flow

az a(Hu) a( Hv)_az + 0() + ay 0 (Formula 4-1)at ax ay

154


au uu au az wx +guat ax ay ax H C 2H (Formula 4-2)

a au) + a (£ auax ax ay y ay

av av av az WV- + -v -+ g- + u -- ±gv-

atu-ax ay +ay+fu- Hb +gv C 2H (Formula 4-3)a av) a avax )ax ay ay

among formula z tidy level, namely, distance between water surface and some

basic surface

u, v - vertical component of average flow rate in the direction of x,y respectively;

H the depth of water;

g - gravitational acceleration = 9.81 ns 2;

f Henseli parameter (f = 2o)V sin (p, (p --- latitude, (XJe ---rotary velocity):

C. Cosi coefficient

E x. E y -: Vortex diffusion coefficient of water flow in the direction of x,y

respectively

W ,WY- component of wind stress in the direction of x,y respectively;

x, y ,-ectangular coordinates;

t time.

The equation (4-1) is the sequence one of water. The equation (4-2), (4-3) is momentum

conservation in the direction of x, y respectively.

The primary condition of above pled equation is:

z(x, Y)I, = = z0 (x, y)

u(x,y)j = = u0 (X,Y)

v(x, Y)J,=O = v0 (X, y)

Boundary condition

Water boundary z(x,y,t) = z(x,y,t) stand for known value;

Land boundary V 0 0 Flow rate is zero in the direction of normal

Once having the above condition, it should obtain the answer of equation in the form of

disperse.. Using transvection abbreviations : (u, v) f uvdQ, to approximate the equation

155


by weighted remainder method (of which ,the second order term using partial integral ),time

aq n+ nderivative ] q ,taking former difference approximate : q = (qn+l q )/At,n as

time step number, A t as time step length (s)it can obtain

A

a(Hu)~ a(Hv)'A(z., ) + (~ )+ (~ d)=O (Formula 4-4)ax ay

-J1 az' 1GU g(u- +v u)" -)+ (U' + vj- I, ) + (g ax ,)+( 2

ax olxC 721{hi

AA IA A

w,- a au~cp a au a(P,Ifv/,(,t,) (H ,O)+- (E -)+- (Cy =0 (Formula 4-5)

H'"' ax Aa ax ay ~ay'ay

ovj, &1 / ) az+1 A g( u2 +V2 *v)1 -

+ (Ua +I v- , )(g C)+( )

_ A A ~ ~ ~~~~~A A

- ~~ji- a a"a a _<_+(fujl Qj)-(HWl+l Qj)+aa (£X ,a ')+aa (F, aaV' aQi)=o (Formula4-6)

H'"' ax 'a a'x ay~ -ay ay'

among formula , au shows a in facing flow unit Ti taking value, remaining

analogy , generalized variable

A A

q=q _j'j q q%cP

Adopting 3 computing nodes and triangle unit area coordinates ,using step function

identity and lumped mass concept can obtain its formal parameter easily .to substitute formula

(6.4)-(6.6)and by transposition, simplify to obtain part finite element equation to fit to

make formulas for computer program (omitted ). the condition of exact answer in equation

is:

Primary condition: Z (x,y,O)=Z ( "*" standing for value known, similarly hereinafter)

Boundary condition u(x,y,O)=v(x,y,O)=O

Boundary of water: Z(x,y,t)=Z*(x,y,t)

Boundary of land: Vn (x,y,t) = 0 (velocity of flow in the direction of

normal)

2) water quality model

156


The mathematical model of water quality regard the convection-diffusion equation of

non- invariableness as a basic equation. (2DH) :

aD aD aD r a aD a aD

at ax ay H x xH ay ay (Formula 4-7)

- K1 L+ f

Among formula : D is concentration of pollutants (mg/1), K1 attenuation coefficient,

L is CODmn concentration , f is source intensity

E, Ey are x,y swirly diffusion coefficient of water flow in the direction of x,y

respectively.

the condition of exact answer in equation is

Initial value : D (x,y,O)=D* (x,y,O) (* Known quantity

aDmargin value : boundary of land -= 0 n Is normal direction outside of the

an

boundary of land?

boundary of water : At influx computing field , D(x,y,t)=D* (x,y,t)

At outflux, without limit

: The obvious explicit facing flow finity element computing formula of similar current

momentum equation is adopted in the water quality model computing formal.

,'+'=D-t{u'> s +'l'+(FPPD+E,yP)` /4X2(Formula 4-8)

+KjJ }+f;

Usually stable condition Atimuch less than At2, current stable play the

role of control but for requirement of precision the gridding set is small in the

outfall of pollutants ,and the purpose is to describe the plane variations of the

concentrations of pollutants .As the lattice among computing field proceeds

in local encryption, the step length of computing time is strictly limited. After

calculation obtain Ati =6 second , At2=30 second, The total computing

field has 11050 units, 6231nodes , the least side length of lattice is

5m, river length is 47km, water area covers 14.8km20

2 Model verification

The model verification calculation consists of water flow verification and water quality

157


verification

1) Water flow verification:

The foundation of mathematical model except for selecting the rational computing

method, the more important thing is to verify the monitoring data and to make a basic

replaying through the computation of the mathematical model to the realistic variations of the

tide height, tidal current speed, tide volume in the monitoring stations. At the same time some

parameters have been rated such as resistance coefficient, the adjustment and extent of the

capacity of watercourses and oxygen consumption and double oxide coefficient and diffusion

coefficient and etc. therefore, verification is the foundation of mathematical model. During

the period of Seventh Five-Year Plan, a series of parameters were taken the rating

computation with the mathematical models, which have a comparative precision. The EA

conducts the verification of water flow again but due to the shortage of outlay, only the tide

height of three stations taken as objects of verification, i.e. Zhenhai, Ningbo, Chenglangyan.

See Table 4-land 4-3 for the results of verification of water level and velocity of flow.

The figure shows that the calculation value and monitoring value are inosculated well

and there is no phase difference; the maximum difference of calculation is 0.15m The

fluctuate tidal current data of near the main trough of Chenglangyan are appreciative with

actual monitoring results .It can be considered that the water flow verification is successful.

02 Water quality verification

The main source intensities of Yong River and Fenghua River collected at present

are gathered in table 3-21 and 3-22, the point is. here only the main pollution sources are

taklen into account but a quite number scattered pollution sources have not included in the

calculation. therefore, the foundation of waste water discharge volume in the verification

computing of the mathematical model is based on the data of sewage discharge volume and

making a certain range adjustment in consideration of the actual water consumption of

Ningbo .The result of COD.I, and DO can be seen in figure 4-4 .As the figure shown the

precision of the verification of water quality is lower than the verification of water flow .

This is caused by the chanciness of sampling and the inequality of the pollutants

concentrations along the vertical line of the section and the plane distribution of section. And

errors of testing and other factors.

So the requirement to the validating precision is not as strict as the requirement to the

water flow verification. However, verification computing reflects basically the variations of

actual monitored pollutant concentrations .the verifications of water flow and water quality

158


show that the parameters selected for the models are rational and the computing methods are

reliable and it can simulate the nature variations and can be used for environment projection

and assessment of the project.

159

Ningbo Jianodongnanqu WWTP & Sewerage Project EIA

~~~~~{~~~~~~~~Z~~ ~ (nii-I

4

3.5

3

2.5

2

1. 5 00

0 12 24 36 48 60 72 84 96 108 120 132D; l J (h)

U4L (m

315

3

2. 5

2

0 12 24 36 48 60 72 84 96 108 120 132Ut r1 (h)

j{r(m 1-: 'il E |IV t

3

2

10 12 24 36 48 60 72 84 96 108 120 132

U;tr fi- (h)

Figure 4-1 Neap Tide Height Verification Results

160

- Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA

WA (ni4 ,

3. 5

3o

2.5 0 0

1.5

114 20 26 32 38 44 50

U; Iij ( h)

)711 (nm3.5 T1ip

3

2. 5

2

1.5 0

10 12 24 36 48 60 72 84 96 108 120 132

H1ri'l1 (h)

47, (ir -f8tt I i-l-ClWA~~~~~~~ O-l4

3

2

10

014 26 38 50

HI[P1 (h)

Figure 4-2 Verification Result for Spring Tide Height

161


fi~f (n) - 1~f4

3

2

8-2 6:00 8-2 12:00 8-2 18:00 8-3 0:00 8-3 6:00

1.5 5it-p-fe

0~~~~0. 5 / -A :00 8-2 12: !8-18:00 8-3 0: 3 6:00

-1oo

11 1111

7kSfl (ni -7k!1!4

3

2 0

1

8-4 6:00 8-4 12:00 8-4 18:00 8-5 0:00 8-5 6:00 8-5 12:00

H4igl ( h)

1. 5

1

0.5 5 /

0 8-4 6:00 8-4 12:00 8-5 0:00 8- :0 8- 5 12:00

-0.5 -I 'I(h

-1

Figure 4-3 Tide Height and Tidal Current Verification Results

162


COD%,,,(n1g/1)

12.00 _ i ___

10.00 o

8.00

6.00

4.00 - .

20:00 0:00 4:00 8.00 12:00 16:00 20:00 0:00 1:00

COD,Mf(mg,f) ig/12.00 0 o p.,5ji

10.00 ' ,

8.00

6.00

4.00

20:00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00

COD1 ,n(mg-1)12.00 - 0

1 0.00

8.00

6.00

20:0 0.00 4:00 8:00 12:00 16:00 20:00 0.00 4 C

Figure 4-4 Background Water Quality Verification (CODm,,)

163


0 00

.5.00 K

*~~~O0~ ~

0 00

20 00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00

0 D0,m4 ) [ -

I 004.00

4.00~~~~~~~~~~

3.00 .

2 001.00~~~~~~~

0.00..

20:00 0:00 4:00 8:00 12:00 16:00 20.00 0:00 4.00

Dom,(mgg/1)

6.00 I H

:4 00 0

3 oo

! (1 0-O,I!J18(I QQt .o ()15

t' G0 0:00 1:00 8:00 1200 16:00 20.00 0:O 4(0)

Figure 4-5 Background Water Quality Verification (DO)

164


4.1.2.3 Impact Projection to Sewage Discharged into the River

1 Design Conditions

After the sewage with high concentration discharged into the river, the pollution

concentration began to change with the movement of water current, and the physical and

chemical mechanism indicates transfer, diffusion, dilution and self-cleaning. Its

concentration is related to hydrological situation. In term of the national criterion, the

impact assessment of water environment must be under the condition of design guarantee

rate of 80%-90% and its water quality still meets with certain standard. (Water quality

set in the function zoning). But for the samples taken for water verification, their

corresponding hydrographic condition often not able to reach the designed guarantee rate

due to various factors limited. Therefore such samples cannot be used for projection and

assessment directly, they must be discriminated before using.

As the tide rang variations of Yong River and Fenghua River has been aperiodically

monitored by water conservancy, shipping, and environment departments but without

systematical records. In the Seventh Five-Plan this issue was studied in details while carrying

out the national key study subject. Through calculation and analysis on the relations among

the tide rang in the sections of Zhaobao Hill of Zhenhai, Meixu and Sanjiangkou of

Ningbo .the mean flux of ebb tide of designed guarantee rates in each section can be

obtained, which is listed in Table 4-2.

Table 4-2 Ebb tide Flux of various guarantee rates in each section(m 3 Is)

Freqn Zhenhai Meixu Sanjiangkou

P=10% 1260 970 690

P=50% 820 640 460

P=90% 450 370 290

The hydrological condition of the up and down boundaries is under the control of tide

height so the tide range is the important parameter to scale the hydrologic guarantee rate.

Therefore the guarantee rate and frequency rate of tide range of Zhenhai station were

recoded .The tide ranges with frequency rate and guarantee rate of 10%and 90% are 2.8m and

165


1.3m separately. The corresponding mean tide range in the hydrological situation of the

sampling is 1.4 m It is must be modified to reach the boundary tide level corresponding to the

tide range and then to be used for projection assessment.

1. Determination of computation schemes

The discharge amount of wastewater estimates at 160000m'/d after start up

of the project. So, in the process of determining the computation schemes used

for forecasting the water quality, it should clarify not only the impact of the

project itse].f on the background water quality of Fenghua River and Yong River,

i.e. not taking account other source intensities (but the current pollution

sources should be included), but also consider the superposition effects of other

pollution sources. There are many projects are building or waiting for buildi.ng

after EIA, so the principle of assessing the new and old pollution sources

intensity together should be followed to consider the superposition effects of

other project' s pollution source intensity.

According to criterion for EA, it is necessary to work out schemes based on the different

types of wastewater discharge, different sewage treatment degrees and different hydrologic

conditions, i.e. to make sachems according to the different conditions of spring and neat tides

including assessment of the impacts of the project itself and impacts of superposition source

intensity.

In the validating computation the current pollution source intensity in the area has been

taken into accounted and including the existing pollution sources of Yong River. Therefore,

the tracing back tide of downriver holds the pollutants discharged in the downriver.

Table 4-3 Computing Schemes Collection

Waste CODcTide water r BOD; Treatmen

N. type (m 3 /s) (mfu) (mg/1) t degree Remark

1 Spring 1.852 120 30 Secondar Overlapping

2 Spring 1.852 240 120 No Overlapping

3 Neap 1.852 120 30 Secondar Overlapping

4 Neap 1.852 240 120 No Superposition

166

- Ningbo Jiangdongnanqu WWVTP & Sewerage Project EIA

5 Spring 1.852 120 30 Secondar Singleness

6 Spring 1.852 240 120 No Singleness

7 Neap 1.852 120 30 Secondar Singleness

8 Neap 1.852 240 120 No Singleness

2, Analysis of computing result

The simulation calculation is conducted according to the computation scheme worked

out and through the computation of the twenty tidal cycles, the pollutant concentration has

basically reached the dynamic balance. Table 4-4 lists the maximum and mean enclosed

area for each computing scheme in different water quality standards The representative

schemes have been selected with their relevant the envelope curve for maximal and mean

value corresponding to various pollution concentrations drawing in figure 4-6 and 4-8(only

considering the schemes with superposition impacts). It is necessary to explain that the

envelope curve line and its area are obtained from the calculation of the area which is

enclosed by the link line to the points of maximum concentration value, but the maximal

value in Yong River and Fenghua River with to-and-fro current as the main current does not

take place simultaneously in up reaches and down reaches of the outfall so the actual area is

less than the area. But it indicates the situation may happen. . The analysis on the drawing

shows:

The calculation shows that no matter what kinds of capacity or tide types the waste water

through treatment is much better than the untreated one in quality It is about one time of

discrepancy for the maximal and mean values in different water quality targets shown in the

envelop curve line draw 4-6 and 4-8. Both the tables and drawings indicate that the untreated

water discharge into Fenghua Rive should be abandoned. Secondly from the different types of

tides, the computation results of schemes of 1 and 3, 2 and 4, 5 and 7,6 and 8 show the neat

tide is disadvantageous condition and the assessment should take neat tide for control but the

impact range of spring tide is larger and the concentration is lower.

2) The separated contribution of the project

The separated contribution of the project to the background water quality of Fungal

167


River and Yong River must be clarified so as to make quantum control and provide scientific

basis in consideration of the allocation of the environment resources. Based on the principal

of sharing resources and rational allocation, the water environment resources should be used

reasonably.

In the period of the Seventh Five-Year Plan, the study subject "Pollutant Receiving

Ability of Yong River " conducted the distribution of pollutants amount in the large area of

Ningbo. Different sections while arranging the projects should verify this time the data. The

calculation shows that under the spring tide condition, normal discharge, the average COD

mn value increased is 3.26mg/l; under neap tide, average increased value 5.38mg/I. Without

treatment the average increased value of CODmn in neap and spring tide condition is

6.52mg/1, 10.8mg/l.separately.

Table 4-4 Results of Each Computation scheme (CODMn)

Scheme 1 2 3 4 5 6 7 8

Phase Phase Phase Phase Phase Phase Phase Phase Phase______ _____ 1 1 1 1 1 1 1 1

Treated Second Untrea Second Untrea Second Untrea Second Untreadegree ary ted ary ted ary ted ary ted

Tid type Spring Spring Neap Neap Spring Spring Neap Neap2mg/ **** 8*** **** **** 3.45 6.17 2.29 2.59

Mx4mgA1*** *** ** ** 0.0023 3.45 1.64 2.28Ma 6mg/1 4.43 ** ** *** 0.00 1.21 0.13 2.06

osed 8mg/ 0.36 3.08 1.80 2.57 0.00 0.0022 0.00 1.64

area lOmg/ 0.00 2.21 0.67 2.26 0.00 0.00 0.00 0.85

12mg/ 0.00 1.16 0.001 2.02 0.00 0.00 0.00 0.12_ _ 1 _ _ _

Maxconcentrati

on in the 9.75 14.40 12.2 18.80 4.23 8.46 7.11 14.20source area

Mea 2mg/ * 1.54 3.82 1.46 2.04n 4mg/ 0.00 1.54 0.39 1.46

encl 2.58 *** ** * 0.00 0.0031 0.00 0.96osed 8 0.10 1.62 0.92 1.94 0.00 0.00 0.00 0.38area lOmg/ 0.00 0.78 0.00 1.33 0.00 0.00 0.00 0.06

168


M12mg 0.00 0.006 0.00 0.78 0.00 0.00 0.00 0.00

Meanconcentrati

on in the 8.80 12.6 9.88 15.9 3.26 6.52 5.38 10.8source area

(m g/,) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Note: I .the computation of schemes has considered the current status of source intensity;

2 . the mean value in the table means the space average of the point' s o f maximal

value happens;

3. In consideration of the overlapping intensities of current projects, projects have

been finished and projects have been assessed for building; 4 connect to the impacts

of other outfalls.

(3) To consider water environmental impact of the superposition effects:

On the basis of making clear the pollution contribution of the project itself, we consider

more to the water environmental influence after consideration of the superposition effects.

Because in the assessment area there are already some finished projects and ongoing projects,

it is necessary to consider the other projects' superposition pollution sources while

conducting the EIA. At the same time, it needs to have a certain forecast time while

considering these superposition sources. According to the studies on the existing literatures,

its boundary concentration value will have an increase of 10-15% to reflect the variations of

the water body in the general environment. The calculation shows that under the condition of

spring, the project with the capacity of 160000 t/d, the average value of full tide of CODmn

has not exceeded Class IV water body. In normal discharge condition, the average

concentrations of the source area is 8.80mg/L; but in neap condition. The average

concentrations of the source area are 9.88 mg/L. There is no pollutant value exceeding the

standard in the full tide maximal value. The maximal concentration in the source area is 12.2

g/ l; but the direct discharge without treatment in the condition of spring , the area exceeded

Class IV water body is 0.78 km2 ,and the average maximal concentration is 12.6mg/L;

And that under neap tides average area exceeded the standard is 1.33 km2 and the maximum

concentration in the source area is 15.9mg/L;

169


Therefore, the analysis on the result of calculation shows that after the start up of the

project, CODmn in Fenghua River will not exceed Class IV water body standard but will be

near the critical point. The main reasons are: firstly, the dilution condition is bad in the section.

which the outfall of the WWTP located; secondly, there is more ongoing project so the

background value of the river is too high.

(4) The difference between treated or untreated impacts on the environment

The calculation shows that in case of the sewage discharged directly into Fenghua

River in the condition of spring tide , the maximal concentration in the source area is

4-5mg/L higher than normal discharge , and the area exceeded the standard is 0.78 km2

Simi ar y under the condition of neap tide, the maxima concentration in the

source area is 6mg/ higher that the norma discharge. This indicates that

it has very ig impact on Fenghua River if the sewage is discharged direct y

without treatment.

170


3 410

_4 _

4 60

I .S~~~~~~~~~~~~

6 40

5 40

Figure -6a Full tide maximal increment isoline of CODMn in normal discharge andneap condition

( 260 20

468020 111u1A I

4 40

Figure 4-6b Full tide average increment isoline of CODmn in normal discharge and neap

171


condition

7

1 2102

Figure 4-7a Full tide accident isoline of CODMn in accidental discharge and neap

Figure 4-7b Full tide average increment isoline of CODMn in accidental discharge and172


neap condition

1<~~~~~~~~1

11

Drawing 4-8a Full tide maximal isoline of CODm,, in normal discharge &neap

173


Figure 4-8b Full tide average isoline of CODMn in normal discharge and neap condition

4.1.2.4 'Water Quality Improvement in lower reaches of the river projectionafter the WWTP completed

1.Brief introduction to the projection mode

The box model is adopted to project the improvement of water quality after sewage

interception. The concept of complete mixed reactor is adopted; substantially it is to give the

simultaneous solution of balance equation of quantity of water balance and equation of

pollutant quality balance. Given cubage of reactor as v, in the time section dt the influx and

flux from the reactor is Qin and Qout separately then the quantity of water balance equation

of the reactor and pollutant quality balance equation are:

Q - Q = dV (Formula 4-9)

Q inC,,, -Q.,,, -KVC= d(CV) (Formula 4-10)

dt

Among formula : Cin is influx pollutant concentrations of reactor (mg/L); Cout is flux

concentration of reactor (mg/L), C is the pollutant concentrations in the reactor (mg/L), K is

degradation coefficient (1/d) 0

According to the concept of complete mixed reactor ,suppose as soon so the pollutant

enters into the reactor it is mixed completely ,hence C=Cou, Hereby unite formula (6.8)and

(6.9) to obtain:

174

Ningbo Jiangdongnanqu WWTP & Sewerage P roject EIA

PCp

QinCin / QoutCout

Figure 6-8 Box model

Qi,, (Cir, - C) - KVC = V dC (Formula 4-1 1)- C) ~~~dt

above formula (6.10) analytic solution

in invariableness condition

C = C = I+Tk (Formula 4-12)

Among formula Ce is balance concentration, T=Q/V is the process time of the

pollutants in the reactor (d)

In variableness:

C = Cc + (C0 - Cc)e 7 (Formula 4-13)

Among formula Co is the concentrations in the reactor at the initial time (mg/L),

Due to the reduction of the main pollution load, the balance concentration Ce is reduced

too to reach a certain standard water quality. It needs to explain that the influx to the reactor

includes sewage; drawing water of waters nearby a flux includes current and storm water

runoff. .

The above calculation can be taken to verify the mean value of the whole water area and

project after sewage treatment .As to the space distribution can be ascertained by the

hypothesis of invariable special value of monitoring value and mean value.

2.Mode Verification and effects of Sewage Interception Ana ysis

Before the projection of the effects of sewage interception, the verification with the

above box model to the water quality of the outfall---Sanjiangkou, Ningbo and outside should

be conducted and the parameters should be rated. Table 6-11 shows the main source intensity

discharged into Fenghua River. According to the characters of Fenghua River and its

pollution load, the theory of box model is used to the calculation with the consideration of the

rainfall run-off of the drainage area and the coming water from the other waters, pollution

175


concentrations and water quantity and degradation coefficients can be used in the water area.

Through calculation, the balance concentration of CODMn is 5.41mg/L, which is close to the

mean value of 5.0mg/L for many years in the past. The error rate is within 10.0%. which

proves the reliability of the box model.

The projection results made by the box model show that in 2010 . before sewage

interception the mean value of CODmn in the section of Sanjiangkou , Ningbo is 7.7mg/L

for many years ; after sewage interception , COD mn is reduced to 2.1mg/L and the reduction

outside of the EIA area is 0.2 -0.5mg/L. The water quality of Fenghua River can be

improved from Class IV to Class III, and the effect is obvious.

4.1.2.5 Main Conclusion

Through the computation and analysis by the mathematical model to different operating

modes of discharge of Jiangdongnanqu WWTP, the following conclusion is obtained:

1. In the condition under the control of neap tide, the area for mean

value of COD exceeded Class IV is 1.39 km if without sewage treatment, and

such discharge should be forbidden for it is far from the allowable standard.

2. Under the normal discharge operating mode, the mean value of CODM, In the condition

of spring tide and neap tide does not exceed the standard of the water body of Class IV, but

the mean maximal concentration in the source area under the neap condition reaches

9.88mgA/.

3. The computation shows that after the completion of the WWTP the mean value of

CODM, in many years from the outfall in the section of Sanjiangkou can be reduced to

2. lrng/L and in the outside of the assessment area the value can be reduced to 0.2-0.5mg/L;

the effect is evident.

4. The submerge discharge type should be adopted in the outfall .The discharge at the

bank should be forbidden for the less velocity of flow, depth and dilution effect of current at

the bank to protect the environment. .

4.1.2.6 Surface Water Pollution and Measures for Prevention and Abatement

1. The projection results show that the after the effluent of Jiangdongnanqu WWTP

discharged into Fenghua River, the average maximal concentrations in the source area have

reached 9.88mg/1 which are close to 10mg/i ,the standard limit of the water body of class IV,

so it is necessary to control the discharge volume and sewage treatment degree.

176

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA2. Separation of storm water and sewage in the plant area.

3. Concerned departments should strengthen the supervision and monitoring to the key

pollution sources in the service areas ,and supervise and urge the enterprises to enhance the

renovation of the environment to the key pollution sources and strengthen the maintenance

and management to the pollution control facilities to improve the operation efficiency so

as to make the sewage in the service area enters into the municipal sewerage system reach the

influence standard of the WWTP and "Standard for the quality of the Sewage Discharged

into the Municipal Sewer" CJ3082-1999.

4. The submerge type discharge should be adopted and the outfall should be extended

and bank discharge should be forbidden.

5. Ensure the security of water - route and pipes at the bottom of the river. The

following measures should be taken: 1. Set up navigation marks; 2. Outfall extended length

should not affect the navigation; 3. Set up anchor dropping marks to protect the pipes at the

bottom of the river.

6. The projection results show that the accidental discharge will seriously affect the

water quality of Fenghua River, so it must be take strict precautions against accidental

discharge.

4.2 Impact on ambient air projection and prevention and

abatement measures

4.2.1 . Impact on ambient air and prevention and abatement

measures in the construction stage

4.2.1.1 Impact on ambient air

The air pollutants generated during the construction period mainly come from dust

caused by loading ,unloading and stacking of construction materials such as cement and

sand ,and earthwork excavation ,dust caused by transportation vehicles ,exhaust gas and

earth dropped on roads .The main pollution factors : NO2 . CO dust and etc. .

Based on the project capacity and compared with the similar projects, the pollutants

emission amount in exhaust gas is shown on Table 4-5, which is calculated on 20 vehicles a

177


day.

Table 4-5 Estimation of exhausts Gas from the construction vehicles

in the construction stage

Pollutant SO2 NO2 Hydrocarbon CO l

emission ( kg/d ) 0.45 5.20 0.64 3.89

The source intensity is low according to analogy investigation and the dusting caused by

transportation of building materials mainly concentrated around the construction site .57% of

the total dust generated is within lOOm of the project site.

The dust generated in the construction site will affect the people living in nearby villages

and dust generated by sewerage network construction, roads excavation will also affect the

residents nearby.

4.2.1.2 Prevention and mitigating measures for ambient air pollution

1 Enclose the construction sites to avoid gravel and waste residue generated

from the construction entering into the surrounding villages and watercourses.

2. Carefully loading and unloading the construction materials in the constriction site 1.:

Try to reduce the area of stacks for sand, carpolite and cement and sprinkle water on the

materials to prevent dusting.

3. Try to clean the mud and earth before the vehicles leaving the construction site,

sprinkle water on passing roads by the various vehicles at fixed time.

4 Carry away the abandoned earth in time when conducts excavation for the

construction of sewage pipe network , for temporary store ,the earth should be stored far from

the housing .

5. Cover sand and gravel ,cement ,residue earth while transporting to prevent dusting..

4.2.2 Ambient Air Environmental Impact and Measures for

Prevention and Abatement in the Stage of Operation

4.2.2.1 Effluvium environmental impact and measures for prevention and178


abatement

1. Effluvium environmental impact

Japan began to implement "Effluvium Protection Rules" in may 1972. The

survey results show that odor is regarded as the ruller to measure the harm grade.

So effluvium standards is devided into six classes. See it in table 4-6.

A 4-6 classification of odor intensity

Odorintensity 0 1 2 3 4 5(grade)

A little Slight

No odor odor Easily Strong Intensitivenotation (threshold (threshold easiy Str nt oi

odor of of perception odor odor

detectability) maintain)

Moreover, the odor intensity is related with its density. "Effluvium Protection

Rules" combine with the above two factors to notate the limited standards of the odor

intensity. The data caculated by induction show that the relationship between intensity and

dense of the effluvium meet the rule of Webster:

Y=klg (22.4 - X/Mr)+ a (1)

5 r Y odor intensity (average)

X mass density of effluvium, mg/mi3

k, a constant

Mr-effluvium pollutants molecular weight

According to the monitoring results shown in table 4-7, the density of ammonia is

highest, then is hydrosulfate. The odor intensity of methyl sulfate alcohol is the higest, and

hydrosulfate is the second(whose odor intensity reaches the intensive grade). It builds founder

for the effluvium controlling process and machine designing.

179


Table 4-7 Result of effluvium accessmentQuality The relationship between Odor

classification matuiu mass effluvium quality mass andmatter ( mg/m3 ) odor intensity intensity

ethylal No Y=1.Ollg(22.4.X/Mr)+3.85oxide propylaidehyde No Y=1.771g(22.4.X/Mr)+3.86

Acetic acid No Y=1.771g(22.4.X/Mr)+4.45Propionic acid No Y=1.461g(22.4.X/Mr)+5.03hydrosulfate 3.64 Y=0.9501g(22.4.X/Mr)+4.14 4.5

methyl sulfate 0.214 Y=1.251g(22.4.X/Mr)+5.99 4.7alcohol

sulfated methyl sulfate 0.415 Y=0.7841g(22.4.X/Mr)+4.06 3.2ether

Dimethyl 0.008 Y=0.985lg(22.4.X/Mr)+4.51 1.9disulfateammonia 4.86 Y=1.671g(22.4.X/Mr)+2.38 3.2

nitride Trimethyl 0.008 Y=0.9Ollg(22.4.X/Mr)+4.56 2.0_ _ _ _ _ _ _ _ _ _a m in e I__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Chinese "Effluvium Pollutants Emission Standards" (GB 14554-93) limit the

typical effluvium pollutants. Accoring to the standard, lots of WWTP monitore

the odor- produced themselves. the results are shown in tahle 4-8, 4-9, 4-100

Table 4-8 monitorin result of Tianjin Jizhaungzi WWTPmethyl

Source hydrosulfate(mg/m3) ammonia(mg/m3) sulfate Odorpoint ~rsa~~m amna~n,m alcohol density

(mgm 3)

Generalaeration 0.222 0.479 0.084 570

basinSludge 30.95 0.312 0.347 6500basin

Contract 52.72 0.475 0.498 20000tank _ _ _ _ _

Trick 0.45 4.7grid50m 0.30 4.1

toword

owom 0.07 3.5toword

180


150m | | 2.6toword 00 .

Q 4-9 monitoring results of Handan East Rural WWTP

Inlet of Outlet ~~~Ambient AmbientSource Inlet of Outlet Grid Sedimentation Contract thin 10mpoint tank tank chamber tank tank grid outside

basin the plantOdorOdensiy 760 110 760 1200 1100 2.8 1.5

densityIIII

* 4-10 monitoring results of Gaobeidian WWTP

Sludge Sludge 50m Outside 100m Outside AmbientSource contract dewatering the sludge the sludge outsidepoint conrc dewae dewatering dewatering thehouse house

house house plant

density 43 173 6.5 1.5 < 1.5

We draw the conclusion by analysis:

(1) The effluvium source point of WWTPis sludge storage tank, sludge contract tank,

sludge dewatering house, aeration basin and grid chamber well.

(2) The main component of WWTP odor is hydrosulfate, ammonia, methyl sulfate

alcohol(All of them are pollutants in Chinese "Effluvium emission protection

Rule" )whose density exceed the standards. So it is belong to controlling target.

(3) Oder density decrease following the increasment of effluvium spreading distance.

The effect is slight outside of 00m and there is no affect far from the effluvium

source.

(4) The oder intensity is different since varity of sewage treatment process. For

example, the process with long sludge age produce less oder density than that

with short sludge age.

(5) Measures for prevention and abatement the effluvium in those effected area must

adopt to ensure discharging reach the standards and improve the environmental

quality.

Otherwise, because there are matters such as hydrosulfate, ammonia, methyl sulfate

alcohol in the oder of WWTP, it is happen to some risk. For example, Tianjin Jizhuangzi

WWTP happened the accident of hydrosulfate leaking when repairing the

181


valve of flash well. Five people died and three people were poisoned.

4.2.2.2 Sanitary Protective Distance

1) Analogy Survey

The main elements of the effluvium from the WWTP are composed of ammonia,

sulfureted hydrogen, methyl hydrosulfide, methyl ethersulfide, trimethylamine, and

etc. Compared with the landfill and fecal matter treatment plant, the effluvium of municipal

wastewater treatment plant is rather weaker. According to the provisions of the standard, the

intensity of effluvium is divided into six grades. Grade 0 represents odorless; grade I

represents odor which is hard to be felt (apperceive threshold value); grade 2 represents weak

odor can be felt (cognize threshold value); grade 3 is obvious odor to be felt; grade 4 or 5 has

strong foul smell, which is unbearable for human being. Due to time limit we have not

organize persons to monitoring but we made a survey and consultation while we made the

analogy investigation to the similar WWTPs. There is little plant having foul smell at grade 4

or 5; generally the effluvium intensity in most of the wastewater treatment plants is grade 3. It

is also known that the effluvium is weak and acceptable at the points 80 meters away from the

wastewater treatment plant. That is the protective distance obtained through the investigation

and consultation.

2) Ascertained by computation

The sanitary protective distance is the minimum distance from the boundary of the

pollutants generated department (workshop or section) to the boundary of the residential

area.

Based on the provisions of "Technical Measures for Establishment of Local

Air Pollutants Emission Standard" (GB/T13201-91) issued in 1991, by the

National Technical Supervision Admi.nistration and the National Environment

Protection Bureau, the sanitary protective distance of the unorganized emission

of the project can be calculated with the fol.lowing formul]a:

V = I (BLC +0.25r2)Y5L"C,, A

Among formula : Qc-Pollutant amount of the unorganized emission , kg/h;

Cm-Standard concentration limit value , mg/mi3

182

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAL---Protective distance needed , m;

R-Equivalent radium of unorganized emission., m:

A, B, C) D-coefficients , obtained from the table

When L 1OOOm, A=470, B=0.021, C=1.85, D=0.84, the average wind speed

in the recent 5 years is 2.9m/s.. The sanitary protective distance of NH3 and H2S of

the project is shown in table 4-1 1

Table 4-11 Calculation of the Sanitary Protective Distance

Pollutants NH3Pollution source intensity 5.33

(kg/h)Maximal allowable 0.2concentration in the

residential area (mg/m 3)Sanitary protective 264

distance

In consideration intensify foul smell in summer and sensitivity levels of different

People, the protective distance is determined according to the standard accepted by the

human sensory organ. The best way to avoid foul smell is to set a protective distance. Though

the WWTP is located at the area where class 2 of the foul smell strength is allowed by air

environment plan, in order to provide people with better air environmental quality, the

protective distance for the project is put forward In the western side of the Jiangdongnaqu

WWTP the foul smell transmits to 300m or farther in low air pressure time, so it is proposed

to set 300m as protective distance.

Ambient Air Pollution Protection and Mitigating Measures

Deodorization can takes the measures such as adsorption assimilation, incineration,

catalyzing burning, chemical oxidation an biological treatment The biological measure

developments very fast because it has many advantages such as simple process, small

investment, lower operation cost, easier maintenance, effective and etc.

According to the sanitary protective distance, the affected range of the effluvium is

within 300 m around the WWTP. It is recommended that the tall plant to be grown in the four

sides of the plant green belt.

The centralized residential area is forbidden to build within the range of protective

distance. The exiting village located in the protective area should be relocated.

183


Wangchuan pumping station and Qiubi puping station are near the residential area of the

villagers,so the odour generated from the sewage will produce some affect on the surrounding

area. The construction unit should try to acquire more land and the location of the pump

house should be built in leeward of the village far from the residential area . The facilities of

the pumping house should be seted in the room . At the same time large trees should be

planted around the pumping stations to reduce impact of odour on villager' s living

environment . It is suggested that the concerned departments carefully prepare the planning of

the surrouding area make the pumping construction site far from the residential area .

4.3 Acoustic environmental impact projection and

measures for prevention and abatement

4.3.1 Acoustic environmental impact and mitigation measures

4.3.1.1 Acoustic environmental impact analysis

Except for transport vehicles, the noise of construction machinery can be regarded as

fixed sound sources. Table 4-12 provides the actual monitoring value of various construction

machines.

Table 4-12 Noise of the Main Construction Noise unit: LMAX (dB)

DistanceDistance between Maxim

Type of between Maxima Type of monitorin al

machinery monitoring I machinery g point soundpoints and level andlelmachinery machiner

CementBulldozer 5m 86 feeding 5m 79

pump

Loading 5m 90 Vibratory 5m 79machine stick

Grader 5m 90 Cocet 5m 74mixer

Road roller 5m 76 Cutting 5m 93184___ _ _machine

184


Grab 5m 84 Electric saw lm 103Pile driver Crane 15m 73

( vibrating 15m 90 Elevator 30m 58ex tracto r) I__ _ __ _ _ I__ _ _ I__ _ _ _ _ I__ _ _ _ _ _ _ _

We take the noise of construction machinery as point source of sound, without

considering other elements; the projection model is as follows:

The geometric radiation noise pattern with non-directional property sources of sound is

adopted for the projection model in the construction stage.

LA (R) = L,, - 20logR - K - A,

among formnula: LA--propagation sound pressure level of the monitoring point

Rm from the sound source ,dB (A);

L, acoustic power level of acoustic source ,dB;

K---Geometric divergent factor takes 8 when propagation space is half free

field and 11 in full free field :

A,.--Sound level attenuation caused by shelters on noise propagation

path ,dB;

R Beeline distance from monitoring point to sound source m.

According to GB12523-90, through calculation the attenuation distances to reach the

limit value of construction site boundary noise of the construction machines are shown in

table 4-13.

Table 4-13 Attenuation Distances of Boundary Noise of VariousConstruction Machines to Reach the Standard

Demand attenuation

No Type of Machinery distance ( m )

Daytime Night time

1 Bulldozer 17.7 1772 Loading machine 28.0 2813 Grader 28.0 2814 Road roller 5.6 56.15 Grab 14.1 140

Pile driver ( vibrating 26.7 Forbidden

extractor )

185


7 Cement feeding pump 14.1 79.28 Vibrating stick 14.1 79.29 Concrete mixer 7.9 44.6

10 Cutting machine 70.6 39711 Electric saw 44.7 25112 Crane 37.7 11913 Elevator 13.4 42.4

In the south of the construction site there is a village, lingia Village . The

construction noise can affect people there in a certain degree. . The site of

sewerage network construction is close to the residential housing, so the

residents will be affected by ground excavation by bulldozer and loading machines

and etc. in construction stage.

4.3.1.2 Acoustic environmental pollution and mitigation measures

1 The construction machines and construction processes with lower noises

should be used like static pressure driven pile or drilling affusion pile

instead of' the ones with high noise such as, the striking driven pile and the

use of self-provided generator should be controlled strictly.

2, When bulldozers ,grabs disintegrators and other loading and unloading vehicles pass

in and out the construction site , their speed should be limited and maintenance of the

equipment and vehicles should be strengthened to keep them in good condition.

3. Arrange the time limit for work reasonably to avoid the noise of the machines place

influences on the residents continually.

4 The noise pollution construction work, which will affect the residents, will be

forbidden after 22:00 PM. If the special need for conducting the noise pollution operation

at night, the application form should be filled in advance and submitted to the

administration department for approval. The operation can be conducted only after the

" License for Night Operation" obtained and the operation should be carried out

according to the requirements of the license.

4.3.2 The impacts on acoustic environment186


and mitigation measures

4.3.2.1 Source intensity of noise

Based on the engineering analysis, the main noise sources of the WWTP are sewage

pump, mud pump, dehydrating machine, blower and etc. (see table 4-14 for details)

Table 4-14 Noise from the main equipment of the WWTP

Equipment Pump Electromotor BlowerNoise dB 85-95 75-85 95-100

The drainage pump of the pumping station to be built will be installed about 4-7m

underground from the surface. When the monitoring is conducted, the monitoring instrument

is set in the side of iron bars 4-7 m from the pump. The source intensity of each drainage

pump is shown in table 4-15.

Table 4-15 Monitoring Results of Noise of Sewage Pumping Stations

Pumping Wudongzha pumping station Ningbo middle schoolstation pumping station

Type of pump 4 8PWL vertical centrifugal 4 ZLB1.4-7.2pump 2 250WDL

Noise 80.1 80.7

4.3.2.2 Noise impact projection of the WWTP

The main noise pollution sources are the sewage pump, mud pump, circumfluence mud

pump and blower, these machines are mainly in pump house, dehydrating house and

circumfluence and blower houses, so the projection will be made mainly on the above

mentioned equipment.

1) Projection mode

The projection mode is adopted the noise projection software made by Loud Technical

Company of Germany.

We have conducted monitoring to the noise of Cixi WWTP. The monitoring results show

that in the pump house the noise of Leq is 87.8-90.1dB, average 88.7 dB; I m outside of the

pump house Leq is 78.9dB. Sound insulation of wall of the workshop is 10 dB. Therefore,

187


according to the above monitoring results, the sound insulation volume of the wall for the

project will adopt 10 dB, The blower have been taken measures to reduce noise by sound

insulation.

2) Projection results

The projection results show that in the operation time the noise in the east boundary of

the plant is 48.4dB,south 38.2dB,west 41.7dB,north 34.3dB.The plant boundary noise can

meet the requirements for the function zone. At the same time in the WWTP there is some

noise generated by sewage flowing into the pond, this impact is limited under the standard of

function zone.

4.3.2.3 Noise impact analysis on sewage pumping station

The monitoring results to Ningzhong pumping station, Wudongzha pumping

station and South Beltway pumping station show the environment noise of each

station is comply with class 4 standard of "Urban Area Environmental Noise

Stanclard" in daytime, hut it goes heyoncd the standard at night. This is caused

hy noise of pumping and water draining. After completion of the project, more

pumps and equipment will be adcled, so the noise value will he increased .The

impacts mainly are generated at night.

4.3.2.4 Noise Mitigation Measure

l. Sound insulation measures should be taken to the blower and pump house

in the WWTP to setup vibrating insulating cushion, noise elimination elbows,

sound absorbing materials on the walls of pump house.

2. Build double deck windows and close the windows of the pumping house while

operating and using sound absorbing fitment in the pump house.

3.As Wangchun pumping station and Choubi pumping station are near the residential

area of the village ,the constrution unit should aquire more land and try to set the sewage

pums and generator unit far from the residential area of the village and install under the

ground and use vibrate separator noise elimination elbow to avoid the noise of pumping house

affect villagers .

188


4.4 Solid wastes environmental impact anal ysis and

mitigation measures

4.4.1. Solid wastes environment in the construction stage and

mitigation measures

4.4.1.1 Solid wastes impact analysis in the construction stage

It is estimated that the construction garbage to be generated in the construction period is

about 9843.1 tons; abandon earth 53620 m3 In addition, there is a certain amount of domestic

garbage.

The construction garbage should be handled in time; otherwise, it will not only influence

the sights but can cause dusting in windy and dry weather. If the domestic garbage cannot

be handled in time, it may grow mosquitoes, emit foul smell and spread diseases to place

negative impacts on the environment.

4.4.1.2 Mitigation Measure for Solid Wastes Generated in the ConstructionStage

1. Stack field should be far from the residential area and located in the leeward of the

villages to prevent foul smell influence the living environment of the residents.

2. The bounding wall should be build around the abandoned earth stack field and catch

drain should be build around the side to ensure the smooth drainage to avoid overflow in

raining season at the same time, drain the leakage of sludge by the catch drain to prevent

sewage overflow.

3. Sludge may produce dusting after dry so the earth stacks should be sprinkled at fixed

time to prevent dusting.

4. In order to prevent water and soil erosion attention should be given to cultivate

vegetation after abandoned earth backfilled.

5. The construction party should contact with the local departments in charge residues

the transport construction garbage and excavated earth out of the site in time and the earth

will be used to make bricks and for backfill earth. The living garbage of the builders will be

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Ningbo Jiangdongnanqu WWTIP & Sewerage Project EIA

collected to trust the sanitary department to handle.

4.4.2. Solid wastes impact in the operation stage and

mitigation measures

4.4.2.1 Solid wastes output in the operation stage

C The solid wastes include mainly sludge and dregs from coarse and fine grid screens,

sedimentation tanks. dewatering machines. According to the FSR of the project the dregs of

screen output is 1.6t/d with water content of 55%-60%. Dehydrated sludge output is 240t/d

with water content rate of •80% ; Sinking sand output is 3.2t/d; domestic garbage output is

0.lt/d. According to sampling did by the Environmental Sanitation Division of the city to

the garbage of two typical residential areas (Huangli and Mayuan) the organic elements of the

domestic garbage of our city accounts for 40.08% and inorganic elements accounts for

57.84%, the rest accounts for 2.08%.

4.4.2.2 Solid Wastes Impacts Analysis in the Operation Stage

The solid wastes include mainly dregs from the grid screen, sedimentation tanks,

dehydrated sludge, domestic garbage. debris of microorganism and decomposed matters and

some are fragmented remains of dead animals and plants. These matters will be putrefied

under certain temperature and humidity, especially in hot weather .The dehydrated sludge

caused serious affects on the environment The main characteristics are as follows:

I-ligh water contain rate (•80%), easy to be washed away

Fine greasy particulates with low water permeability

Easy to become breed places for mosquitoes and flies and spreading

sources for diseases;

Easy to generate leach water to pollute surface water and ground water;

Main impacts on environment of solid wastes generated by the project in

operation stage are as follows:

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1. Impacts on Air Environment

The mail impacts of solid wastes on air environment include the impacts on

ambient air of WWTP caused by sludge dewatering and stacking and impacts ambient

air on the way due to solid wastes transportation.

The pollution caused by sludge dewatering and stacking mainly is foul

smell and its extent is related the time for stockpiling of dehydrated sludge . The

longer time for stockpile take, the stronger foul smell it has.

The impact of solid wastes transport mainly is the odor, exhaust gases and

dusting on the ambient air on the way.

2. Impacts on surface water and ground water

Dehydrated sludge has low water permeability and it becomes slurry after

soaking, which is easy to washed off. Especially when it is caught in rain, the

sludge and leach water flows with rain to the surface water to cause pollution.

The leach and dissolubility elements in the sludge permeate into underground

so as to cause ground water pollution. According to the analysis to the sewage

composing in the project area, industrial sewage accounts for over 50% of the

total in the service area of Jiangtongnanqu WWTP. It is estimated that the

proportion industrial sewage volume will be increased .The industrial sewage

contains more heavy metals, so does the sludge. When heavy metals enter into

the ambience, the cumulative effects will be caused.

3. Impacts on Sanitation

Dehydrated sludge mainly consists of microorganism remains and decomposed matters,

which contain various pathogens and intermediates devoting abnormal matters. Mosquitoes,

flies and water sources to harm the human body will spread these matters.

4.4.2.3 Mitigation measures for impact of solid wastes in the operation stage

Land filling is a method adopted by most of the domestic WWTPs while treating

dehydrated sludge. It is easy to operate and has less secondary pollution, but the

precondition is the land filling must meet the criterions for sanitary landfill. The sludge of

Jiangdongnanqu WWTP will be stored temporarily in the sludge shed (with raining

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Ningbo Jiangdongnanqu WWTP & Seweraoe Project EIA

and leaking preventing measures to be taken). And then transport to landfill

site for sanitary landfill.

At present, there is only one garbage dump and landfill in Fengling. Fengling garbage

dump is a garbage incineration plant .The landfill is used for land filling the ash and dregs of

the domestic garbage after incinerated. Ash landfill capacity is 130X 104m3 The sludge of

the project will be land filled in Fenglin landfill site for 3 years temporarily .The new landfill

site is in the stage of site selection. The sludge disposal will be in the new landfill site after it

is completed.

In order to prevent the exploding caused by anaerobic digestion, in the process of landfill

the sludge should be filled with domestic garbage and with more vent-pipes.

The domestic garbage will be in charge by specific persons for collection and the

sanitation department to the landfill site for centralized disposal will transport it.

Strictly prevent the domestic garbage, sludge, wash water from the sludge treatment

facilities and wash water of ground to flow into the surface water to cause water environment

pollution.

The impact of solid waste on the environment will be reduced after above disposal,

4.5 Impacts on Social Environment Analysis and

Mitigation Measures

4.5.1 Social environment impacts in the construction stage and

mitigation measures

4.5.1.1 Impacts of Land acquisition and resettlement analysis

The project is located in the southern part of the city where mainly is farmland so the less

housing to be dismantaled . According to "Resettlement Plan for Ningbo Jiangdongna

WWTP and Sewerage" the land acquisition of the project is 170 Chinese Mu ,which belongs

to Linjia village ,ZhonggongmiaoTown,Yinzhou District .The households of 83 will be

192

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAaffected The total affected people are 267,of whom ,165 are labour force . The total land

temporarly used by the project is 126000m2(189 Chinese Mu).97 houses in the village will

be dismantled ,with a total area of 9552 m2 and affected people 314.

1. Permanence and temporary land aquisition

The land acquisition of Jiangdongnanqu WWTP is 170 Chinese Mu. It should affects

Linjia Village, Zhonggongmiao Town,Yin County which located in the southen part of

Ningbo Rural. Linjia Village is far from 5km to Ningbo City. All village people have changed

their ID into Ningbo City. Land in Linjia Village has not been contracted to its people when

the third land undertaking. Now there are no crops in those areas. The total affected lands

temporary used laying sewerage network are 126000m2.

Tabel 4-16 Jiangdongnanqu WWTP and sewerage project land acquisition both

permanence and remporary

Permnence land Temporary landcounty (district) town village acquisition acquisition

Linj iaYin County Zhonggongmiao Town Village 170

County Land 189Total 170 189

2.dismantled house

97 houses in Linjia Village, Zhonggongmiao Town,Yin County have been

dismantled with a total area of 6552m2,include RC structure houses 1767m2, BC structure

houses 3391m2, BW structure houses 1624m2, facility structure houses 2770m2 and other

houseing attechment. See table 4-12 for detail. In the dismantled houses, the area of 93

percent is more than 45m2 and the other 7 percent is not. It is shown in table 4-16,4-17.

Table4-17 the house and attechment affected by the JiangdongnanquWWTP and sewerage

item unit amountRC structure m2 1767

Build area of BC structure m2 3391dismantled BW structure m2 1624

house Facility structure m 2770

totle m2 9552

Concrete level ground m 2 2700

Cowshed piggery etc. m2 300

attechment Build wall m2 1800phone set 60

Cable TV household 90

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Table 4-18 stastics area affected by the projectHouse area (m 2 ) household ratio people ratio Total area (mi) ratio

House area<20 0 0% 0 0% 0 0%

20<House area 5% 5 2% 110.37 1%<30

30<House area 2 2% 3 1% 83.44 1%<45

I]\ i-l 7 7% 8 3% 193.81 2%

45<House area 13 13% 32 10% 671.53 7%<65

House area _ 65 77 80% 274 87% 8686.66 91%

Totle 97 100% 314 100% 9552 100%

3.affected population97 houses in the village will be dismantled, with affected people 314,

of whom, 165 are labor force.Table 4-19 affected population by Jiangdongnanqu WWTP and

sewerage unit: household, peopleAffected type

household 83

Land acquisition population 267Labor force 165

dismantle Of whom: household 97population 340household 97population 314

Of whom: Labor force 165

4, Affected tender population

In the process of public consultant, There are 7 poor households whose house area is

less than 45m2 in those dismantled village people.

5, affected ground attachment

Eight items of those affected ground attachment are shown in table 4-17 l

Table 4-20 Ground attachment and public facility affected byJiangdongnanqu WWTP

item unit number

WC I 2

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item unit number

I OKV wire pole 1 6380V wire pole 1 10

transformer set 1

trench M2 200Road for ploughing amnchine M2 180

Plastic shed M2 2668

Large trees >five years 1 70

Young tree <three years 1 140

The total costs of the relocation and resettiment of is RMB 30.412 which will include

the total cost of the project .See 4-11 for detail .

Table 4-21 Budge ar estimate of the resettlemt costs of the projectItem unit amountCompensation standard (Yun/unit)Cost (lOOOOyun)

I Permanence land 170 111423 1894.19acquisition

land Mu 170 44000 748.00compensation

resettlementsubsidy Mu 170 20000 340.00

young crops Mu 170 1000 17.00compensition Mu_170______17_00

Tax on land Mu 170 6670 113.39occupation

land reclaim Mu 170 12006 204.10fee

waterconservancy Mu 170 400 6.80fund

landacquisition Mu 170 3602 61.23management

fee for newconstruction Mu 170 21344 362.85land withpayment

contingency Mu 170 2401 40.82II Relocated 9552 610.23residents housing 9

RC structue m2 1767 845 149.31housing

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Item unit amountCompensation standard (Yun/unit) Cost (lOOOOyun)

BC structure m2 3391 755 256.02housing

BW structure m2 1624 605 98.25housding _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

facility

structure m2 2770 385 106.65housing

III housing 15.65attachment

Concrete m2 2700 20 5.40level groundcowshed m2 300 80 2.40piggery etc.

bounding wall m2 1800 25 4.50

Phone set 60 108 0.65

Cable TV Household 90 300 2.70

IVResettment cos 27.73standard

relocation Househould 97 200 1.94subsidy .

relocation m2 9552 15 14.33encouracgement

Resettlement m2 9552 12 11.46transition fee

V Gound 18.63attachment

WC 1 2 10000 2.00

I KV wire 6 100 0.06pole

381V I 10 80 0.08wirepole

\transformer set 1 10000 1.00

trench M2 200 20 0.40

road foploughing M2 180 35 0.63manchine

plastic shed M2 2668 50 13.34

large trees 1 70 100 0.7>five years

youngtrees < tree 1 140 30 0.42years

1-5 total Yuan 10000 2566.43

VI reconnaissance 2% 51.33and desgn fee

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Item unit amoun Compensation standard (Yun/unit) Cost (IOOOOyun)VII monitoringand assessmen 1.5% 38.50costs _________

VII management 4% 102.66costsIX training fee 1% 25.66X buget reserve 10% 255.64Total costs Yuan 10000 3041.2

Table 4-22 The General Budgetary Estimation for ProjectResettlement

No. Items Amount (Mu) Unit price Total cost

(Y I0000/mu) (YIOOOO)

1 Land acquisition 170 20 3400

2 Cost of pipeline 20.4 20 408

and pumping

station

3 Total 3808

The project land acquisition involves a rural nature village, Linjia village; the relocated

people are 366. People will be resettled nearby, so there is only small change for the people

living and production .The living standard of people relocated will not be reduced thanks to

the resettlement policies and compensation polices of the state .So resettlement places small

impact on the residents. General speaking, the affected people are willing to resettle in

different places .Of cause, some people have objections to the resettlement polices and

standards because the project area is located at Yinxian Center District, an area with advanced

economy and people have better living standards here. There will be much work to be done

carefully for those people in carrying on the resettlement.

Part of the labor force will become surplus due to the land acquisition of 170 Chinese

Mu The spare labor force will be absorbed by local industry sectors, which is relatively

advanced, The local government should encourages enterprises to receive those people.

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4.5.1.2 Impact on Traffic

The sewerage network project involves three districts i.e. Haishu, Jiangdong, and

Yinzhou. The excavation of roads due to pipeline construction causes traffic obstacles and

influences traffic and people' s living The traffic jams chances will be increased due to

construction materials transportation.

4.5.1.3 Impact on navigation route

The two river crossings of Ningzhong pumping station and South Beltway pumping

station adopt the process needing the excavation of footing groove, which will influence the

navigation of Fenhua River. The off shore submerged drainage measure is adopted in the

project. and this work needs the excavation of part of the beach of Fenghua River. The

construction of the section is complex and construction period is long. Though the work will

not influence the navigation. it will make the navigation route become narrow.

4.5.1.4 Impacts on living quality

The land acquisition and house relocation will produce a certain degree of impact on

working. schooling and living of the residents, which need to solve properly.

Dust produced by construction of pipelines and excavation of roads will affect people' s

living quality because air pollution.

4.5.1.5 Mitigation Measures

1. To make rational compensation and resettlement to the affected people according to

the polices and regulations issued by the state and the local government to reduce the negative

impacts of the project on their work, study and living and ensure the stable of the income and

living standard.

2. The construction of sewage pipeline should be carried out section by section, at the same

time to get contact with the traffic department to set up temporary convenient channels, and

arrange traffic policemen to maintain the normal order and try to avoid construction materials

198

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAtransportation in rush hours to easy the pressure of traffic .Set up separators between

construction site of pipeline and the roads.

3. For pipeline construction, in some sensitivity points such as residential area and etc, it

is necessary to sprinkle water by watering cart to prevent dusting on the way which the

construction vehicle passing by.

4. During the construction of the river crossings and outfall of the WWTP, to make

contact with the navigation department and obtain their acceptance to set up caution mark

to demonstrate navigation director so as to let ships bypass in time. Caution signal lamps

should be set up during operation at night.

4.5.2 Social Environmental impact in the operation stage

The project is to build Jiangdongnanqu WWTP and sewerage to increase the sewage

treatment rate and improve the environment of the city. It is an environmental protection

project so the operation of the project will play a positive role on the social environment. The

main aspects are as follows:

l. AI'ter the completion of the project, the sewage of 7 service areas will

be treated in the WWTP and reach class II emission standard prescribed in

GB8978-1996 (Comprehensive Sewage Emission Standard) .The disorder state of

present sewage discharge by multi-outfalls will be changed and the discharge

of volume of pollutants will be greatly reduced .lt has a great significance

for improvement of water quality of Yong River, Fenhua River and inland rivers.

2. The construction of WWTP can effectively control urban sewage and pollutants

discharge so as to effectively control water body pollution, unbalance of ecosystem,

deteriorating of drinking water sources, maritime space environmental pollution.

3. The project can increase the disposal rate of sewage in the city of Ningbo

and improve the general environmental quality so as to improve the city' s

investment environment and image to promote economic development; it is also

a,precondition, and guarantee for sustainable social and economic development

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of Ningbo.

4.6 Ecological environmental impact analysis and

mitigation measures

4.6.1 Ecological environmental impact in the construction

stage and mitigation measures

4.6.1.1 Ecological environmental impact analysis

The construction of the outfall of the WWTP and river crossings will produce

SS in water body of F'enghau River and cause changes of dissolved oxygen, diffusion

of heavy metals in bottom sediment ancl partial change of pl-l value.

a, Impact on Fishery Analvsis

Fishery resources are deficiency in Yong River and Fenghua River according to

investigation. and also there are few breed aquatics so the impact on fishery is small.

hA 'I'he impacts on hydrophily biological resources

The construction process of river crossings needs pipeline-sinking

excavation of groove on the river bottom and the outfall of WWTP needs to excavate

the sediment in the outfall in Fenghua River. This will cause the change of

velocity of flow to affect sedimentation and movement of mud and sand .The

planktons and bottom dwell creatures will be affected to a certain degree.

4.6.1.2 Mitigation Measures for ecological environment

1. The land acquisition of the project is 170 Chinese mus so it is necessary to restore the

vegetation after the project completed and restore the landscape to plant more tress and reduce

water and soil erosion.

2 Rational processes should be adopted in the construction at the bottom of the river, to

reduce excavation volume and reduce the impact on water environment.

4.6.2. Ecological environmental analysis in the operation stage

200



4.6.2.1 Ecological environmental impact analysis

The main pollutants in the effluent of the WWTP are CODcr, nitrogen, phosphorus and

etc. The analysis on the projection of Fenghua River shows that in the spring tide under

normal discharge condition, the full tide average value of Condemn has not exceeded the

standard of Class IV water body and the average concentration of the source area is 8.8mg/L;

but in the neap tide condition, the average concentration in source area is 9.88mg/L without

exceeding the standard even in full tide .The water quality of Fenghua River still can maintain

the standard of Class IV. This shows the effluent discharged from the WWTP has less impact

on the ecological environment of Fanghua River.

The main situation is in the mix area near the outfall, the life forms may be affected

slowly in a certain degree, especially to those life forms sensitive to pollutants. At the same

time, the influent of the WWTP contents of heavy metals which will produce slowly and long

accumulated effects on part of the life-forms. The discharge of nitrogen and phosphorous

provide the substance foundation for eutrophication of the water body.

4.6.2.2 Mitigation Measures for Ecological environmental Pollution

1. The WWTP should be built strictly according to the provisions of "Quality Standard

for Sewage Discharged into the Sewer "CJ 3082-1999 and " Integrated Discharge Standard of

Sewage Discharge "GB 8978-1996 It. is required to control the components of industrial

sewage especially the one contents heavy metals and other injurants to make stability of

effluent discharged from the WWTP.

2. The analysis on normal monitoring shows that the ammonia nitrogen and total P in

Yong River and Fenghua River exceeds the standard. The related function departments should

make further investigation and put forward relevant prevention and abatement measures.

4.7 Analysis of accidental risk

The main risk is unusable of WWTP and pumping stations (such as equipment disorders

and power cut to cause sewage flooding or discharge into the river directly. Another risk is

exploding May happen due to sludge landfill.

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4.7.1 Pumping unusable

The pumping stations rehabilitation of the project includes: Ningzhong combined

pumping station and Wudongzha sewage pumping station reconstruction and new

construction of Wangzhun and Qiubi pumping stations . As Ningzhong and Wudongzha

pumping station are located along the Fenghua River so in cases of power cut or pump

disorders the sewage would flood into the river with less impact on the surrounding

environment . But Wangzhun and Qiubi pumping stations are near the residential area of the

village sand there is some farmland near Qiubi pumping station ,therefore if the above

mentioned incidents happened ,the villagers' living environment will be affected serious .In

order to handle these kinds of accidents the double power sources and standby spare pumps

and generators will be prepared. At same time the maintenance of the equipment should be

strengthened .

4.7.2 The Accidental discharge of the effluent of the WWTP

The accident discharge of the effluent of the WWTP mainly happens under the condition

of electricity cut and equipment damaged resulting in unable to work or to make the sewage

discharged directly into Fenghua River. According to the projection to the effluent discharged

from the WWTP into Fenghua River, under spring tide condition without treatment the

average increment of COD mn is 6.52/L; under neap tide condition is 10.8mg/L. In

consideration of the existing and planning superposition effects, in the condition of spring tide,

the area of water body exceeds Class IV is 0.78 sq.km; the average maximal concentration in

the source area is 12.6mg/L; and that in the condition of neap tide the average area exceeded

the standard is 1.33 sq.km; the average maximal concentration in the source area is 15.9mg/L.

Compared with the projection result of sewage discharged without treatment, there is a

discrepancy nearly one time between the maximum value and average value . This indicates

that the untreated sewage discharged directly into Fenghua River will produce great impact on

the water quality of Fenghua River, such things must be avoided. The measures can be taken

as follows:

(O Adopt double circuit feeding;

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© Sufficient standby equipment and emergency parts must be prepared;

(E Strengthen the maintenance of the equipment of the WWTP.

4.7.3. Dehydrated sludge Centralized Landfill

The dehydrated sludge has low water penetrative and when it is land filled in a large

quantity it will produce gas of CH4, CO and H2S and etc after aeration and due to the

cumulating reactions, explode may happen when flammability gas reaches the explode limit

so as to affect the operation of the landfill .The mitigation measures are as follows:

To mix the dehydrated sludge with municipal garbage to increase ventilation;

Set more vent-pipes;

To treat by methods of aeration and digestion to reduce water content.

4.7.4 adding chlorine risk

EIA suggests that the process of WWTP should adopt dispoisoning measure by use

chlorine. The physical and chemical characters of chlorine are:

Configeration: yellow and green gas. Becoming liquid under high pressure.

Boiling point:-36.5 C. Fusion point: -101 C.

Relative density: vapour 2.5(air=1); liquid 1.56(water=l)

Vapour pressure:634.8kpa(20°C)

Dissolvability: dissolving in water and aqueous alkali. Dissolving easily in CS2 and

CC14.

Risk:serious poison

Intensive stimulation

Bombing when mix with other combustible gas in the sunlight.

Chlorine is a harmful gas exsited in sorts of industries. It can be used to prepare

agricultural chemistry, bleach, dispoison chemistry, solution, plastic, synthetic fiber and other

chloride.

The main riskness of chlorine is

l.taking place accidents when liquid chlorine cylider is ransported long

distance:shinning of breaking of liquid chlorine cylider; leakage or

203


explosion because of thrashing of dumping in the transport.

2. leaking or other accidents because of disfunction or losing contral of the chlorin adder.

3. releasing the residual liquid chlorine when changing cyliders.

4. leaking or explosion because of disoperation.

5. leaking or explosion because of the accident of storage or natrual factors beyond

contraol.

Prevention measurens are:

I.Chloring factory and its storage house must apply with the rules of GBT16 Fire

Prevention Standards of Construction Design. The health and environment must accord with

GJ36 industrial enterprise design health standards.

2. Liquid chlorine culider must be checked periodic. Cylider should be put in special

house without any combustible materials.

3.Apply with the safe standards for chlorine storage and transport.

4.The cylider junction can be set a aspiration cap which can move. Gas either discharge

empty after being washed by alkli solution or relate with the aspiration cap. When the density

of NaOCl is accumulated enough, it can be sent into chlorine adding house.

5.The workers who touch chlorine process such as using, store and transport must be

trained and tested. They can not begin to operate until they receive the certificate. The obliger

of chloring using, storing department should practisely master the process and characters of

the equipments.

6. Carry out the safe poerating standards strictly, eliminate leaking and incipient fault

lying in equipments and ensure the normal condition of equipments.

5 Alternative Schemes

The WWTP will not only conform the requirements of design cnterions but also in

allusion to the realities to reduce the investment. So it is important to work out more schemes

to integrate environment protection with economic benefits.

5.1 Site of the WWTP Selection

The following elements have been considered in the selection of the site of the WWTP:

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1. To integrate with the existing sewer drainage network

The sewers of Ningbo have been built and perfected on a continuous basis and from a

combined drainage system transiting into a separate drainage system. Since 1992, in particular,

with loan from the World Bank, many trunk sewers have been built to form a trunk pipe

network discharging sewage to Sanjiangpian. Before this project, sewage from downtown

areas is mainly drained into the three rivers. So, the construction of the treatment plant will

take advantage of these sewers to rapidly and directly collect the sewage as much as possible

and give them a treatment before discharge, and the planned treatment plant in

Jiangtongnanqu can meet the above requirements.

2. Plant location is basically in the load center

In the previous planning, both Ningbo and Yin County had their own sewage collection

and treatment facilities although they are close with each other, and treatment plant of each

had neither economic benefits nor environmental benefits. The combination of the two plants

according to "Urban Master Planning of Ningbo City" (1995-2010) is a breakthrough by

which the fundamental facilities can be shared and plant location is basically within the load

center, thus providing benefits both in scale and economy.

3. Convenient for recycling of effluent from the WWTP

The issue of reuse of the treated sewage has been given more and more attention by

people; the effluent treated can be reused in the industrial park of central area of Yingzhou

District. Changfeng thermal power plant, which is adjacent to the sewage treatment plant, is a

best outlet of the treated sewage from the sewage treatment plant, where the sewage is used as

circulating cooling water, showing an obvious economic benefit.

4. Issue of incorporate with Jiangdongbeiqu WWTP

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First, distance between Jiangdongbeiqu WWTP and Jiangdongnan WWTP is more than

10km, and delivering distance of pipeline is about 20 to 30km. As sewage are delivered by

gravity, 2 to 3 large-sized pump stations shall be built along the pipeline, thus huge cost for

construction and operation is required. According to estimation, if the combined plant is built

in Jiangdongbeiqu, the cost of sewers and pump stations will increase by RMB 80 million,

while the investment for sewage treatment plant will make a RMB 5 million reduction. So the

total construction investment will increase by RMB 75 million, and the cost for sewage

delivery will increase accordingly. In addition, it is necessary to lay additional costly sewers

to the treatment plant in Jiangdongbeiqu along the river as the construction of sewers in

Renminglu and Jiangdongbeilu along the river are already completed. Furthermore. as the

sewage treatment plant in Jiangdongbeiqu is within Yong River scenic spots, expansion of

land for the plant is impossible.

To sum up. site selection for Jiangdongnan WWTP is reasonable and feasible.

5.2 Sewage Treatment Process Schemes

5.2.1 Brief description of the schemes

Recommended Scheme

A/O process: After the first stage treatment, the incoming water and returning sludge enteranaerobic section (Section A) for TP removal and then enter the aeration tank (Section 0) andbiological nitrification so as to remove organic, NH3-N and P, afterwards, they enter thesecondary settling tank to reach the standard for discharge.

Substitute SchemeOxidation ditch process: The oxidation ditch process is a process improved from the activesludge method. Its aeration tank is a sort of sealed channel. The mixture of sewage andeffective sludge flow in circulation continuously in the channel. Being simple in structure,easy for management and reliable for operation, the process is widely used in China and othercountries.

5.2.2. Alternative Scheme

A/O process effectively removes organics and TP while the NH3-N content in outgoing watersatisfies the requirement of standard for discharge. In the time, the chemical method is used toremove TP released from the filtrate after dewatering. Anaerobic section and aerobic sectionare adopted in the A/O process as a biological and chemical method. An

206

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAagitator is provided at the anaerobic section for flow pushing and a blower with airdistributors at the tank bottom is provided for the aerobic section. The energy consumption islow and sludge is basically stable.

Oxidation ditch process is good for oxygen removal with nitrification and reverse-nitrificationreactions. Anaerobic tank is provided before the ditch to remove TP and a chemical method isused to remove residual TP in the filtrate. Oxidation ditch process consists of three channelswith a disc for oxygen supply. It needs long period for sludge and big power consumption.The treatment of sewage and sludge is good. See Fig. 5-1 for details.

Table 5-1 Sewage Treatment Process Comparison

Item A/O process Oxidation ditch processAdvantages 1.Organic matters removal 1. Organics removal and

ensured; NH3-N removal comply2.NH3-N removal Ž60% and P with the standard.removal by biological method

3. Easy to management, blowingaeration, less maintenance foroxygen supplying equipment4.One A/O tank, with land

occupation lower5.Lower investment and

operation costsDisadvanta 1. More sludge 1.Complex management

ges more work formaintenance;

2. Long time for sewageretaining and sludge with

more power consumption;3. More land use and

investment

Upon comparison, investment, operation cost, operation experience, raw water quality

and discharge of outgoing water, etc. shall be also taken into account so as to make a proper

recommendation. As organics and NH3-N and N in sewage in the treatment plant is not so

high, advantages oxidation ditch can not be fully played, actually the limited site area is the

critical reason, without more space, further expansion with a capacity of 40 X 104m3/d is

restricted. Therefore, A/O process with dephosphorization by biological method is

recommended

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Dehydrated Sludge Disposal Methods

At present the common method to be used for sludge disposal in urban WWTP is

incineration method and the ash is used for farming fertilizer (soil improvement), garden

greening, filling and sanitary landfill.

The advantages of incineration of the solid wastes are to realize the maximum reduction

of amount, to kill all pathogen. toxin pollutants to be oxidation: the heavy metals content is

lower than active sludge. The disadvantages are: the combustibility of sludge is lower due to

the complex components; the exhausted gases generated by incineration are complex and

harmful; the toxin gases will be produced during the process of burning, it will be caused

secondary pollution to the ambient air without air purification equipment and the cost for

incineration is too high. Even in developed countries incineration equipment only accounts

for 10%. According to the economic strength. it is different to use this method now.

The relevant permissible maximum concentrations have been prescribed in the

Pollutants Control Standard for Farming Sludge" (GB 4284-84) of China. The standard is

applied to farming land using sludge from the urban WWTP.but study on farming use of the

sludge in China is backward, the existing technology and equipment are not mature, in

addition the lack of fund, high cost to develop and produce farming fertilizer and even

resistant by farmers all these reasons restrict the development of the use of farming sludge.

The sludge organic fertilizer can be used in the flower nursery to improve soil to increase

the content of organic elements in soil. , The heavy metals and harmful matters cannot enter

into food chain. Therefore sludge has a larger potential in the urban garden greening, but the

bacteria content in the sludge is too higher, if people touch the trees or flowers, it will be

harmful to the health. and that it emits odor in early days of using to make people feel bad .

These issues need to be studied further.

To send dehydrated sludge to landfill for sanitary landfill is the method adopted in most

of the WWTP in our country. At present sludge landfill is disposed with the urban garbage

together. The standard sanitary landfill has leakage prevent facilities can prevent N, P and

heavy metals pollute the ground water. So the method has the advantages of less secondary

pollution, easy operation, but it occupies more land.

To sum up, there are many methods for the sludge disposal and each has its advantages

and disadvantages. In consideration of the aspects of environment protection, economic input,

high maneuverability, and effects to control pollution and improve the environment, the

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method of dehydrated sludge landfill is recommended.

6 Public Participation

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6.1 Objective and method

6.1.1 survey objective

The objectives of the World Bank project, Jiangdongnanqu WWTP are to increase the

sewage disposal rate of the city, to improve the urban environment and improve the living

condition of people. However, the project will place some negative impacts on nature and

social environment of the city in the construction stage and operation stage, The life, work

and study and entertainment of the people in the project area will be affected directly or

indirectly In order to understand reflections of people from government agencies. enterprises

and organizations and other areas a public survey has been carried out .The public are invited

to provide opinions and evaluations to the project to improve the engineering

design ,plan ,and construction to make the project better and EIA more completed and

objective .

6.1.2 Survey Objective

The way of public surver combined againstic and prohabilistic characters

to make the EIA more objective without individua] and personal subjective.

6.1.3 Survey Method:

Visiting project area and different levels of governments, enterprises and units and

residents in the service areas and issuing questionnaires will carry out the participation of the

public to collect judgement and suggestion which are also collected by mass midia to notice

public the report of EIA and correlated document.

6.1.4 Survey Orgnanizations:

the institution conducting of EIA adopt all sorts of measures to collect the judgements

and suggestions of governments, enterprises and units and residents in the service areas who

should be compensated.

Two rounds public participation have been finished. The detailed step of the first public

participation is: issuing quewtionnaires to different levels of governments,enterprises and

units and residents in the service areas .

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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAThe detailed step of the second public participation is: issuing public notice in "Ningbo

Daily" to known public how to inquire the information of the report of EIA and correlated

document and feedback their judgements.

6.2 The First Survey content

6.2.1 Survey Content:

6.2.1 .1 Individuals:

Acquaint oneself with the WWTP;

Attitudes toward to the project;

Satisfaction to the current sewage treatment and sewerage of the city;

The impacts of the project on the people living nearby;

Impacts on economic development;

Attitudes to the construction of the project

Attitude to the resettlement

6.2..1.2 Organizations:

General ideas and attitudes to the construction project;

Whether the project benefit to the development of the area and departments;

Whether the project will improve the living quality of the local people;

Whether the project will benefit to the local sights and tourism,

lImpacts on agriculture and environment

6.2.2 Survey Results:

6.2.2.1 Survey objects and proportion:

In this public participation activity we visited different levels of governments, enterprises

and units and residents in the project area and service areas. We issued 50 questionnaires and

collected 41 sheets, of which 35 questionnaires from individuals in the project area and

service areas and surrounding area; 6 from organizations i.e. Zhonggongmiao Township

Government, Zhonggongmiao Township People' s Congress, Yinzhou District People' s

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Congress, Yinxian Center Administration and etc. in the project area and surrounding areas.

Random issuing the questionnaires to the individuals and the background of the people

to be investigated were not known in advance. Therefore, the occupation structures and

education structures of the people are not equality, but the range is large and involves many

areas including resettlement areas, project surrounding areas and remote areas, which has

better representative.

Ningbo Jiangdongnanqu WWTP Public Participation and Survey ObjectProportion (individuals)

Occupation Leaders Cadre Worker Farmer Student labore

Person 0 14 12 8 0 1% 0 40.0 _ 34.3 22.8 0 _ 2.9

Below Junior High Senior Technical UnderEducation primary school # r High secondary Junior

school School school CollegePerson 5 6 5 2 17

% ___ 14.3 17.1 14.3 5.7 48.6

Age 18-35 35-60 >60 Sex Male FemaleNumber of 18 13 4 Person 21 14

person% 51.4 37.1 25.0 % 60 40

Residential Neighborhood of Remote area of theResettlement area prjc.__________area project project

Person 8 2 25% 1 22.9 5.7 71.4

6.2.2.2Survey Results Analysis:

Individuals:

No. Item Selection ProportionI Acquaintance degree to Know 48.6%(17)

the project Unknown 51.4%(18)Support 91.4%(32)

2 Attitudes to the project Object 0Not care 8.6%(3)

3 Impacts on your life, work Much impact 22.9%(8)and study by the project can be endured, 14.3%(5)

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=____ No 62.6%(22)

Opinions to land Satisfaction 25.7%(9)4 acquisition and Basic satisfaction 60.0%(21)

compensation Dissatisfaction 14.3%(5)Satisfaction to current Satisfaction 25.7%(9)

5 sewage treatment and Basic satisfaction 54.3%(19)sewerage network Dissatisfaction 20.0%(7)

Satisfaction 8.6%(3)6 Satisfaction to the currentBasically satisfaction 68.6%(24)

surface water environment Bicsatisfaction 22.6%(8)Dissatisfaction 22.8%(8)

Impact oftepojPositive 54.3%(19)7 Impacts of the project on No 22.9%(8)

the people's living Negative 22.9%(8)

Do you mind noise and Yes 68.6%(24)8 off-odor produced by the

proj ect No 31.4%(11)Impact onsociaPositive 82.9%(29)

9 Impacts on social No 11.4%(4)economic development Negative 5.7%(2)

The survey shows:

1 , The people did not acquaint themselves with the project .The people who have known

the project accounting for 48.6%. More publicity needs to give.

2, People support the construction of the project which showed by the result of people

support the project accounting for 91.4%and no one objected the project .

3. People who think the resettlement of the project will place large impact account for

22.9% and they are mainly from the project area and their houses are to be relocated .People

who think less impacts account for 14.3%, and they are mainly from the surrounding areas of

WWTP and service areas near the sewerage network. 62.6 % of the people think no impacts.

4, . Generally people think satisfaction to land acquisition and compensation measures

and only 14.3% are dissatisfaction. Such people mainly are from resettlement area.

5, The people who are satisfaction to the sewage facilities of the Ningbo account for

54.3% and the people who are satisfaction to the surface water of the city account for 68.6%.

6, The people who think the project will give positive impacts on the people' s living

account for 54.3%,and they think the construction of the project will improve the urban

environment and benefit to the people' s living .The negative answers account for 22.9%,

and such people mainly live around the project and resettlement area and they think the land

acquisition, resettlement and "three wastes" discharge will affect their living.

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7, 68.6% of the people care the impacts to be brought by the operation of the

project This shows that the consciousness of people to the environment and no matter live

near or far from the project area people show concerns to the "three wastes " in the

operation of the WWTP.

8, 82.9% of the people think the construction of the project will benefit to the

economic development and 5.79% do not think the project will benefit to ,they are mainly

from resettlement areas .. .

Organization survey:

No. Items Comments Proportion

1 Opinions and attitudes Good (support) 100%to the project Not good (oppose) 0

. . ~Benefit 1 00%oIf the project benefit to

2 the local or sector Without benefit 0economic development No impacts 0

If the project will Benefit 83.3%3 improve the living Without benefit 0

quality of the area No impacts 1.7%

Imacs gicu Positive impacts 66.7%Impacts on agriculture167

4 and environment Negative impacts 16.7%No impacts 16.7%

If the project benefit to Positive impacts 50%5 the sights and tourism Negative impacts 16.7%

of the region No impacts 33.3%

The survey results analysis shows that the social organizations support the construction

of the project and think it benefit to the economic development of the region and

sectors .83.3% organizations think the improvement of the environment will benefit to the

people' s living quality. 66.7% of the people think it will benefit to agriculture and

ecological resources. They think the sewage after treatment will reduce impacts on the

surrounding and reduce sewage to be discharged to the surroundings .16.75% organization

think it will not benefit to agriculture and ecological resources and they think large sewage

discharge will affect the water quality of the Fenghua River .50% people think it will benefit

to local sights and 16.7% of the people think it will not benefit to certain parts of

environment.

Summer the opinions of people through survey:

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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAI Work to be improved on land acquisition ,resettlement and compensation;

2, The operation in the construction period should pay attention to the sensitivity

points ,mainly the villages and project surroundings;

3- Take appropriate measures to handle noise and off-odor emissions to reduce the

impacts on the environment

To sum up, the construction of the project has achieved public' s understanding and

support, and most people think that the project will benefit to the improvement of living

quality of local residents' residential condition The project will benefit to the economic

development of the city. Though there are some negative impacts on part of the villagers for

the land acquisition, resettlement and construction and operation, as long as we do a better job

in resettlement and land acquisition compensation and in the construction period take

effectively measures to reduce impacts on the residents nearby by the noise and dust etc

caused by the project, and take environment protection measures in operation period, the

negative impacts of the project to the nature and social live can be controlled in the allowable

range .

6.3 The Second Survey

6.3.1 Survey Content

According to the requirement of the World Band policy of EIA and actual requirement,

we have had the second public survey on the I h, march,2003 by issuing "public notice" in

"Ningbo Daily" . The objective is to make people understand and participate Cicheng

Town' s environment protection project and know how to inquire the report of EIA and the

correlated datas of immigrant resettlement. We also set the information feedback mail box to

receive the suggestions of public.

(1) resting place and time

data resting place: reading room of Baoyugang Libery(the 2nd Floor). Inquiring

online(web address: www.nbepb.cnnb.net)

resting time: since the 7 th ,march, 2003

6.3.2 Survey results

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Accroding to the periodic inquiry and back visiting to the resting place on the 3th, april

2003, we did not find any feedback notice in the mail box and suggestion book. The libery

managers tell us many readers inquire their datas againsticly and partial readers read the

project data without giving any suggestion. They consider the main reason is that (I) the

living rhythm is fast, their works are busy and the project has little relationship with them.(2)

the Jiangdongnanqu WWTP project is a environment protection item which benefit to people.

Because people have no any judgements they have not left any words about it.

6.4 Final Survey Result

To sum up, the inquiry targets of the public participation represent different levels. The

survey result show that:most people hold-up the construction of the project. As a social

benific project, it will be benefit ecological environment and water quality of the city,

develop the construction of ground attachment of the city, increase the figurativeness

and grade of the city and optimize the investment climate of the city. It should promopt

the development of the social economic of the city. It is suggestion that the batter job

should be done to compensater the villagers for land acquisition and supply them

employment, as the same time take good environment protection measures and use the

construction funds appropriately and effectively.

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7 Environmental Economic Benefit and Loss

Analysis

Urban sewage disposal project belongs to social commonweal infrastructure and it

contributes to eliminate water environmental pollution. The issues of sewage discharge

become more and more important with the expansion of the urban area. At present, the main

receiving water bodies of the city of Ningbo, Yong River and Fenghua River, their water

quality is in the critical status of Class IV water body. Moreover, Yong River and Fenghua

River obtain their present environment load for water quality depends on tied of seawater in

shore. Therefore, the pollution degree of Yong River and Fenghua River will affect the

seawater quality in shore. And that in the range of the service area large amount of industrial

sewage and domestic sewage cannot be brought into Yong River and Fenghua River and it is

discharged directly into t he inland rivers. This will not only produce pollution on the surface

water and greatly restrict the development of the local economy. A good water environment

will not only benefit to people' s health but also produce positive impacts on industrial water

utilization, fishery and hydrophily ecosystem and also benefit to the economic development.

But centralized treatment of urban sewage will not only need a larger input and higher

operation cost every year, but also the discharge of effluent after treatment will cause

pollution on the water space of the discharged area to reduce the environment quality of the

area and bring losses to people' s health and fishery. Moreover, there will be great potential

217

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAimpact for the disposal of sludge. No matter whatever methods to be taken, incineration or

landfill, as soil improvement agent it will produce various impacts on the environment.

The environmental economic benefit and loss analysis mainly study the feasibility of the

project from the point of view of social benefit, economic benefit and environmental benefit.

of which, economic benefit is more immediacy, and it can be measured by currency but as for

social benefit especially environmental benefit, there are some indeterminacy, potential and

risks. Such analysis can only give an approximate range and status to conduct qualitative

analysis with non-monetary form but the macro and microcosmic economic evaluation must

be conducted to weigh the benefit and loss of the construction project. The benefit of WWTP

will be mainly reflected on environmental benefit due to it is a environment protection project,

and certainly it has comparative economic and social benefit but it may also bring some

losses.

7.1 Economic Benefit

According to the feasibility study report, the construction investment and operation cost

is shown in Table 7-1.

Table 7-1 Investment and operation cost of Jiangdongnanqu WWTP(10000 Yuan)

Item Investment Yearly operationcost

WWTP 21283.69(Including land 2541acquisition fee and other fee)

Sewage networks 18927.77(Including other fee) 3520(including pumping

stations)

In addition, the land acquisition of the project is 170 Chinese Mu, if each Mu of land

produces 500 kg paddy, the loss of paddy will be 85000kg/a; the economic loss will be

340000Yuan/a.

WWTP project is part of the urban infrastructure belonging to public utility and its

revenue base is sewage treatment volume. According to calculation , if the project can meet

the requirement of repayment of the world bank loan , the unit price of sewage charge would

beRMB2.1/M 3 . According to the design capacity of the project , the average

sewage treated volume would be 58.4 million m3 . So the total revenue in an

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operation year is RMB 122.64 million.

7.2 Environmental benefit

7.2.1 Cost Estimation of Main Environmental Protection

Measures

The total investment of the project is RMVB 402.11 million. The investment of each

environment-engineering item is shown in Table 7-2.

Table 7-2 Environment Engineering Investment Schedule

No Item Cost Remark(lOOOOYuan

1 WWTP and 40211.46 The project is environmental projectSewerage network and the project investment is taken

as environmental investment2 Sludge disposal 455.52(yearl Sludge landfill cost is 52 Yuan/t

3 Noise control 504 Afforest 505 Construction stage 50

7.2.2. Environmental benefit and loss analysis

7.2.2.1 Ambient air benefit and loss analysis

Environment loss in the construction stage: The project will generate some

dusting in the construction stage, which will produce some impact on the

environment of the project area. It will return to the original air level after

the construction of the project.

Environmental loss in the operation stage: It is mainly the effluvium

emitting from the WWTP. The air pollution protection and abatement cost will

be taken as a loss of the environment damage, which mainly includes the relocation

of the people in the surrounding sensitivity areas.

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7.2.2.2 Water environmental benefit and loss

Environmental loss in the construction stage: It includes the cost of disposal of slurry

water, storm water in construction stage, cost for treating domestic sewage in construction

stage. monitoring cost in pre- construction, during the construction and after construction

stages.

Environmental benefit in the operation stage: The effluent of the project will produce

impacts on partial of the Fenghua River, but in view of the overall water quality of the river.

the analysis shows the water quality of Fenghua River will be improved.

By construction of Jiangdongnanqu WWTP, COD, BOD5 and total P will be reduced

3000.2t ,420.5t and 43.8t per year, respectively( inlet water quality caculated by the sewage

quality of the pump station in the EIA). Due to the removal of the pollutants, the construction

of WWTP will leave more space for the total amount control in this area.

As soon as the project is finished, the sewage of Yin County central area, Cicheng Town

and Dongqianhu city will flow into it. then discharge into fenghua River after being treated.

The current stutas of sewage discharge derectly into inner rivers should be changed which is

of great benefit to the three districts.

7.2.2.3 Acoustics Environment benefit and loss analysis

Environmental loss in the construction stage: The noise of construction equipment will

place impact on the environment, but the impact is hard to calculate. The impact will be

reduce by rational measures and disappeared after the project.

Environment loss in the operation stage: The loss in the operation stages mainly the cost

happen for noise control, which is about RMB 500000.

7.3 Social benefit

Environment loss: the relocation and resettlement of the villagers in the project area,

which is converted into RMB 38.08million and there is some loss for farming land.

Environment benefit: The project is urban infrastructure, and is the necessary condition

for production and living. It produces active impact on promoting the living standard and

health level of the people of Ningbo .The main aspects are as follows:

I.lmprove water quality status

The project lies in Yin County whowe river web distribute thickly. The main river

includes Nantang River, Zhongtang River and Qiantang River.Recent

220

Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAmonitoring reports show that the water quality of Yin County river web is in the critical status

of class III-V.In recent year, because the economic of Yin County improve fastly, its town

industrial enterprises develop well, the industrial and sanitary wastewater increase more and

more. Howerer, because urban infrastructures are not satisfied, those wastewater discharge

directly into the inner rivers nearby. Therefore, the water quality of river web of Yin County

become more and more polluted. In some setions,the pollutions such as oil, BOD5, COD

exceed the standard of class V and the contralling target of environment function area.

According to the mornitoring datas for Yong River and Fenghua River from 1997 to 2001,the

main pollutants affected Yong River and Fenghua River are ammonia nitrogen, total P, oil,

Do and BOD5 which exceed the standards at different periods. The pollutants of Sangjiangkou

is higest and chengjiangyan and zhangjianqian the second. The matched issuing sewerage

should change the current status that city sewage discharge ranomly into Yong River,

Fenghua River and inner rivers from much many outlet aperture. All sewage should be

concentrated to treat and issue at inquiring standards. The pollutants especially P should be

decreased much more than ever, so as to reduce the pollution of water environment, suppress

water body nourished, inprove water quality of Fenghua River and fully display the industry,

fishing, water transports function of Fenghua River.

2. matching the total amount of pollutants discharge

By construction of Jiangdongnanqu WWTP, COD, BOD5 and total P will be reduced

3000.2t ,420.5t and 43.8t per year, respectively( inlet water quality caculated by the sewage

quality of the pump station in the EIA). Due to the removal of the pollutants, the construction

of WWTP will leave more space for the total amount control in this area.

3. Achieve continuous development

Following with the rapidly development of Ningbo city's social and economi,the amount

of wasterwater and sewage will increase much more. Water body pollutation will become

more and more heavy. Polluted area will be markedly increased, ecology will be destroyed

clearly, water quality for drinking is more deteriorative,and the pollution of sea environment

will be more serious step by step. The construction of the project should help to increase the

sewage treating rate, improve present sewerage, realize the separate system, discharge

smoothly, increase the total environment qulity of the city. Therefore, the investment

environment and the configuration of Ningbo will be improved which prompt economic

crafting. The project ensure social, economic continuous development. As the same time, it is

venifit to improve and increase the living condition health of Ningbo.

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4. implement the city master plan

To realize the environment protection target of Ningbo City master plan, sewerage and

concentrated wasterwater treatment plant must be rapidly improved. The project is one of the

two WWTP which is planed to build before 2010 in the city master plan. The request that

sewage treating rate reach to 60 percent in 2010 cound not be satisfied if the project won't

build.

8 Environmental Management and

Environmental Monitoring Plan

8.1 Environmental Monitoring Plan

The main impacts of the urban WWTP on the environment is the impacts of

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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAeffluent discharge and sludge on the surrounding area of the WWTP, therefore

the priority for the environmental monitoring should focus on the water

environmental quality of surrounding area and adjust the treatment degree of

the WWTP in time and adopt relevant environmental protection measures.

8.1.1 Environmental Monitoring Plan for Surface Water

1. Water quality monitoring points

Three monitoring points to be set up on Fenghua River:

500m in upper reaches from the outfall, outfall and 500m in the lower reaches

from the outfall

One monitoring point is set up in inland rivers.

Near Eastside Bridge

2- Monitoring items and frequency

Monitoring items: pH, DO, oil BOD, CODM, CODcr, Ammonia Nitrogen total

fecal coliform bacteria and negative ion surfactant .

Monitoring Frequency:

Two times per month

Emergency monitoring (aperiodicity)

8.1.2 Sludge Monitoring Plan

Monitoring Range:

WWFP

Sampling time and method:

Once in a month to monitor the sludge generated from the WWTP and planning

to landfill outside

Monitoring item:

Water content

8.1.3 Sewage water quality monitoring plan

Monitoring points to be set up:

Inlet and outlet of the WWTP, three times a day, once in the morning, noon and

afternoon

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Discharge flow monitoring:

Once a day

Monitoring Items:

pH,DO,oil BOD.CODN,,CODcr,ammonia nitrogen .TPWfecal conliform bacteria,

negative ion surfactant ,volatilization hydroxybenzene , Hg, lead , cadmium

sexadvalent chrome ,cyanide The automatic measurers ,sampling system should

be equipped . For some major indicators such as pl-l,COD the on line monitoring

equipment should be used to ensure the sampling frenqency not less than 2h/time

The analysis methods will base on the standard methods of the state.

8.2 Environmental Management

8. 2. 1 Institution and personnel

The Environmental Protection Division (section) will be set up in the WWTP and there

will be labouratory under the division to take charge the monitoring and testing. The division

of environment protection will be supervised directly by the director of the plant.

8.2.2 The responsibility of the Division

The project environment protection division will be responsible for the environmental

management and monitoring in the operation stage. Its main responsibilities are as follows:

1. Prepare the environmental protection plan including the short plan as well as the

long-term plan.

2. Put forward environmental protection budget and final accounts schemes and properly

allocate and use the outlay;

3. Carry out and put into effect the environmental protection laws, regulations

and policies formulated by the state and local government; receive the supervision of

the environmental protection departments in the project area, Yinchou District and

Ningbo Environment Protection Bureau. Cooperate and help related agencies to carry

out the work of environmental protection well.

4. Prepare and manage monitoring data, prepare phase report and annual environmental

224


monitoring report;

5. Organize technical training.

8.2.3. Implementation of environmental management and

monitoring plan

1 , Institution organization

The establishment of Environmental Protection Division should be arranged in the initial

stage of the project construction and start operation after the project finished. During the

construction period it should be strengthen the relations with the environmental

administration departments of Ningbo to enhance the environmental management in the

construction stage. .

2. Outlay available

A great amount of outlay needed by the Environmental Protection Division to purchase

equipment and at the same time a lot of money to spend on the operation of the equipment

yearly. This part of cost will be included in the investment budgetary estimate.

3. Personnel Training

The staff in the Environmental Protection Division should be received technical training.

The technicians should have the certifications issued by the environmental protection

department so as to ensure the reliability of monitoring quality. The management staff should

be trained and educated in the aspects of polices and regulations to promote their management

level and professional level.

4. Enhance management

The leaders of the plant should strengthen the management to the Environmental

Protection Division and at the same time to giver more concern and support to it in policy,

outlay and talent people.

8.2.4 Setup Insulation Belt

The sanitary protection distance of the project is 300m. It is inadvisable to set up

commercial and trade district and residential district in the surrounding area of the WWTP. It

is suggested that to build greenbelt or road as insulated belt. The residential area should be set

up in the area over 300m away.

8.2.5 Setup navigation marks and anchor ban marks above

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Ningbo Jiangdongnanqu WWsTP & Sewerage Project EIA

bottom pipeline and ouffall

Submerged discharge of the drainage of sewage disposal will be adopted. The outlet will

be extended from the bank to river .In order to ensure the safety of the navigation; the

navigation marks should be set up at outlet. Anchor ban zone should be set up 50m from the

two sides of bottom pipes and discharge pipes

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9 Conclusion and Suggestion

9.1 Current Environmental Status Conclusion

9.1.1 Ambient Air

According to the monitoring on site, the maximal daily average concentration of SO 2

NO?2 TSP in the project area is 0.013mg/m 3 . 0.025mg/m 3 and 0.222 mg/m3 without

exceeding the standard of Class Il ; the maximal value concentration hourly of H 2 S is

0.005mg/m3 without exceeding the limit value prescribed in " The Maximal Permissible

Concentration of the Pollutants in Air in Residential Area " , but the concentration of NH3

hourly is 0.961mg/m3 exceeding the standard by 3.8 times .

9.1.2 Surface Water Environment

According to the analysis on the monitoring results in 1999-2001 in Ningbo, the water

quality of Yong River meets the Class IV standard in "Environmental Standard for Surface

Water" GB 3838-2002. Among the three sections, the water quality in the section of

Sanjiangkou is the worst, the items of NH 3 N, TP and BOD5 exceeding the standards in the

section The heavy metals are in the state of no results; some results were checked in wet

seasons but the concentration is very low which meets the requirements of Class I standard.

Part of the indicators in the section of Chenglangyan, Fenghua River exceeds the water

quality of Class V. The items of oil, total P and DO in the section of Panshidu reach the

standard of Class IV. The water quality of the inland rivers in Yinzhou District reaches Class

IV standard, and part indicators such as oil, BOD5 ad etc exceed Class V standard.

9.1.3 Acoustics Environment

The monitoring results in the WWTP site show that the noise value in the east, south,

west side has not exceeded the limited value of Class 3 set in "Environmental Noise

Standard for Urban Area" and in the north side the value has not exceeded the standard of

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Class 4. As for the three pumping stations to be renovated. The noise value reaches the

standard of Class 4 when they are in the operation state at daytime. The value exceeds the

standard at night mainly caused by the noise of pumping.

9.1.4 Ecological Environment

The land to be used for the WWTP construction is now plantation and housing

for villagers. There are two types of soil- alluvial soil and paddy soil at the site of the

plant . The soil in this region is highly slaked and cultivated soil with high productivity. It is

mainly used for planting economic crops such as orchid, rapeseed, melons, orange, vegetable,

grass seed and etc.

Due to frequent influences of already existed human activities in the project

area, the wild animals are mainly those of small kind who are used to the

influences of human beings like mouse, and these is no wild animals with

conservation value.

Birds are mainly of aquatic kind that lives on Fenghua River, just in a small number. In

recent years the water pollution in Yong River and Fenghua River is serious so there is few

breeding aquatics by people and fishery resource is in short as well.

9.2 Pollution sources output

9.2.1 Effluent Discharge of WWTP

The design sewage treatment capacity of the WWTP is 160000m3/d according to FSR

and the capacity cannot meet the requirement of sewage discharge in the area so the WWTP

will operate in full load .The total effluent discharge will reach 160000m3/d with small

amount of domestic sewage generated by the staff of the plant.

9.2.2 Solid waste of WWTP

The solid waste of the WWTP includes dehydrated sludge, dregs of coarse and fine grids,

grit of grit tank and scruffs of the sedimentation tank and living garbage of the staff.

9.3 Environmental impact Conclusion

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9.3.1 Ambient Air

The air pollutants generated during the construction period mainly come from dust

caused by loading, unloading and stacking of construction materials such as cement and sand,

and earthwork excavation, dust, exhaust and material dropped on roads caused by

transportation vehicles. The main pollution factors are: NO2 . CO ,dust and etc. The affected

scope is surrounding area of the construction site. After construction finished, the quality of

ambient air can return to the original level.

The foul smell emitted from the WWTP is a mixed gas mainly containing the factors of

ammonia, methyl hydrosulfide, methyl ethersulfide, trimethylamine, etc., but the main portion

is ammonia and sulfureted hydrogen. The main sources of foul smell come from grille,

sedimentation tank, aeration tank, sludge dewater machine room and sludge store tank. The

source intensity of discharge of NH3 is 0.255kg/h and H2 S is 0.096kg/h. According to

Technical Measures to Establish Local Air Pollutants Emission Standard (GB/T13201-91) for

projection and analogy study, the sanitary protection distance of the project is 300m.

9.3.2 Water Environment

According to the water flow and quality model of two-dimensional non-constant flow

projection, when the effluent is discharged into Fenghua River, under the spring

condition ,normal discharge ,the COD mn value increased in average is 3.26mg/I; Under

neap tide, average increased value, 5.38mg/l. Without treatment the average increased value

of CODmn in neap and spring tide condition is 6.52mg/I, 10.8mg/I. In normal discharge

condition, the average concentrations of the source area is 8.80mg/L; but in neap condition.

The average concentrations of the source area are 9.88 mg/L. There is no pollutant value

exceeding the standard in the full tide maximal value. The maximal concentration in the

source area is 12.2 g/ 1; but the direct discharge without treatment in the condition of spring,

the area exceeded Class IV water body is 0.78 km 2 ,and the average maximal

concentration is 12.6mg/L; And that in neap condition average area exceeded the standard is

1.33 km2 and the maximum concentration in the source area is 15.9mg/L;

The results of the projection show that the water quality of the discharge of the

wastewater after treated is much better than the one without treatment .The maximal values

and average values' discrepancy is more than one time. The neap tide is disadvantage

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condition. The water quality of Fenghua River is higher for the content of CODcr.

The projection results made by the box model show that in 2010, before sewage

interception the mean value of CODmn in the section of Sanjiangkou, Ningbo is 7.7mg/L for

many years; after sewage interception, COD mn is reduced to 5.6 mg/L. The water quality of

Fenghua River can be improved from Class IV to Class III.

9.3.3 Acoustic Environment

In the south of the construction site there is a village, Lingja Village. The

construction noise can affect people there in daytime as well as at night. At

night the noise of loading machine, leveling machine and electric saw and etc

can affect the area more than 250m around. The construction should he stopped

at night to reduce the impact on the sensitive points around. Many residential

houses are near the pipeline network construction site, so the noise generated

from the construction site will affect the living environment of the people.

According to the projection to the operation stage, the maximal value in the boundary of

the WWTP in the operation stage is 48.8 dB (eastern side), without exceeding the standard

limit value of Class 3 function zone and the impact of the noise of the flow in the sewage

tank is limited. This indicates that the boundary noise in the operation stage can reach Class

3 standard set in "the Industrial Enterprise Boundary Noise Standard" GB 12348-90/. The

three pumping stations to be renovated meet the standard of Class IV at daytime set in "the

Industrial Enterprise Boundary Noise Standard" . The indicators exceed the standard at

night. All the pumping stations are set up at the river far from the residential areas so the

impact is less.

9.3.4 The solid waste

The solid wastes in the construction stage mainly include abandoned earth,

construction garbage and living garbage of the builders. The garbage of

construction can generate dusting easily and living garbage is easy to grow

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mosquito and produce foul smell. to spread diseases and produce negative impact

on the surrounding environment.

In the operation stage, the dregs output is 20m3/d, dehydrated sludge, 96t/d, grit, 3.2t/d,

living garbage of the staff, 50kg/d. The foul smell and leakage from the solid wastes may

produce impacts on ambient air, surface water and ground water and at the same time it is

easily to spread diseases.

9.3.5 Social Environment

There are about 120 households with 366 people to be relocated and 225 Mu land to be

required. . The living and residential standard level of people relocated will not be reduced

according to the resettlement and compensation polices of the state and that the spare labor

force caused by reduction of land can find jobs due to the developed economy in the area.

Therefore the impact of resettlement is small.

The construction will produce a certain impact on the navigation of Fenghua River.

Before the construction to contact the departments in charge of the traffic and navigation, the

construction will be carried out by stages under the precondition that the traffic should not be

affected to ensure the normal order of traffic and navigation.

The land acquisition and houses relocation will place a certain impact on the work, study

and living of the residents and the dusting generated by the pipeline construction will

influence the living quality of the residents living along the line.

The construction of the project will increase the sewage treatment rate and improve the

urban environment so the operation of the project will place positive impact on social

environment.

9.4 Conclusion for pollution prevention and abatement


9.4.1 Prevention and abatement measures for surface water

pollution

1. The results of the projection show that in the source area the pollutant average

maximal concentration reaches 9.88mg/L; it is close to the limit value of Class IV water body

standard, therefore, the effluent discharge and sewage treatment degree should be controlled. .

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2. The separation of sewage and storm water will be carried out in the plant area;

3. The concerned departments should strengthen the supervision to the key pollution

sources in the service area and supervise and urge the enterprises to enhance the prevention

and abatement work and management and maintain of the facilities for pollution prevention

and abatement to promote the operation rate of the facilities and make the sewage entered into

the municipal sewers to reach the standard of the influent of Jiangtongnanqu WWTP and

"Water Quality Standard for Sewage Discharged into the Municipal Sewer" .

4. The outfall will adopt the submerged discharge type and the outfall should be extent

and forbidden discharge at bank:

5. In order to ensure the safety of the navigation route and the bottom pipes, the

following measure should be adopted: 1 set up navigation marks; 2 the extending length of

the outfall should not influence the traffic of the navigation route: 3 set up anchor marks to

protect the safety of the bottom pipes;

6. Strictly prevent accidental discharge of the WWTP

9.4.2 Prevention and abatement for ambient air pollution

1. Set up sanitary protection distance. The distance is 300 m

according to calculation.

2. Within the protection distance, the residential area should be

forbidden and the villagers in the area should be moved.

9.4.3 Prevention and abatement measures for acoustic

environment

1. The noise pollution construction works, which affect the residents, will be

forbidden after 22:00 PM. If the special need for conducts the noise pollution operation at

night., the application form should be filled in advance and submitted to the

administration department for approval. The operation can be conducted only after the

"License for Night Operation" obtained and the operation should be carried out

according to the requirements of the license.

2. Sound insulation and noise reduction measures should be taken for blower

and pump house in the WWTP; set up vibrating isolation tray and noise elimination

elbows and the wall of the pump house should be decorated with sound absorbing

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materials.

3. The double deck windows should be used for pumping station and close doors

and windows while pumping and the machine room should be decorated with sound

absorbing materials.

9.4.4 Solid waste impact and prevention and abatement

measure

1. The tankcar to be used for sludge transportation to avoid dropping and leaking on the

way;

2. The dehydrated sludge will be transported to Fenglin Garbage Incineration Plant for

landfill. Such disposal will last for 3 years and the sludge will be transport to the new landfill

site after it is finished.

9.4.5 Prevention and abatement measures for social

environmental impact

lAccording to the related policies and measures for resettlement and compensation by

the state and local government, the affected people will be compensated and resettled properly

and their income and living standard will not be reduced;

2, Make contact with departments of communications and navigation while carrying out

pipeline construction ; The construction should be done by stages to ensure normal order of

traffic and navigation;

3. During the construction pipeline, water the roads, which the construction vehicles

passing to prevent dusting impact on the residential area or other sensitivity areas.

9.4.6 Ecological environmental pollution and prevention

abatement measure

1. Resume the vegetation and landscape damaged during the construction stage,

2. Strictly control the industrial sewage ,especially the industrial sewage contenting

heavy metals according to the requirements of "Water Quality Standard for Sewage

Discharged into the Sewer" CJ 3082-1999 and " Integrated Sewage Discharge Standard

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"Gb8978-1996 to make stable of the water quality of the effluent discharged from the

WWTP.

3. The pollutants of ammonia nitrogen and total P exceed the standard in Yong River and

Fenghua River It is suggested that concerned departments to make further survey and put

forward relevant measure for prevention and abatement to avoid eutrophication of the waters.

9.5 Environmental management and monitoring plan

9.5.1 Environmental monitoring plan

The main impact on the ambient environment in the operation stage for the

WWTP will he the effluent discharge and sludge, therefore in the operation stage

the priority of environment monitoring is to monitor the water quality of water

environment surrounding the WWTP

I'here are three monitoring points which is located in up reaches 50Gm from

the outfall, outfall and down reaches 500m from the outfall. The inland

monitoring point is set up near the eastern bridge .'The sludge generated from

the WW'I'P wil] he monitored once a month. The inlet and outfal.l will he monitored

three times each day.

9.5.2 Environment Management

The Environmental Protection Division will be established, under which is a laboratory

to be in charge of work of environmental management and monitoring. Set up anchor ban

marks in outfall and bottom pipes area. Set up sanitary protection distance insulation belt.

9.6 Final Conclusion

The guideline of " design, construction and put into production simultaneously" should

be carried out for the project. Through strengthen the supervision and management to control

the impact on the environment in a limit range. The completion of the project will produce

obvious social benefit and economic benefit for the urban construction and economic

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development of the city of Ningbo. To sum up, it is feasible in the aspect of environment.

protection for Jiangtongnanqu WWTP and Sewerage Project.

10.REFERENC

I.Guo jing, Analysis and Accessment of Effluvium pollution status of WWTP. 2001.10

2.Shao Lin gong, Selection Technical Process of Sewage Treatment in Northen City WWTP.

3.Shang Zijie, Dranage Works. Beijing: Chinese publication of Achitecture industry 1996

4.Zhang Minqin, Search Development of Sludge Effective Utiliation. 2000

5.Chen Tao, Selection the Proper Utilized Measure of Sludge

6. LI Guoding, Exploiting and Using of Solid Wastes Resource.

7.Huang Mingrong, Treating engineering for Water Pollution

8.Zhang XiangShu, Environmental economics. 1994

9.Exploting the Urban Sewage Resource. 1984.1

10.Zhang Runxian, Recent Urban Sewage Socializing and the Fact of Integrated Contral.

I I.Wu Shanyang, Treatment of Urban Sewage- Investment and Decision.

11. APPEND FILES

1. Project geographic position graphic(1:75000)

2. Project function position graphic to monitor(1:75000)

3.Arrangement plan of factory area(l :100000)

4.Noise forcasting result graphic

5.Arrangement graphic of main pollutants discharged into Yong River

6.Arrangement graphic of main Pollutants discharged into Fenghua River

7. "Entrust Letter of EIA Work for Nlngbo Jiangdongnanqu WWTP and Sewerage Project"

issue by Ningbo Urban Infrastructure Development Office on the 29t", dec,1999

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Registration Form for Approval of the Environment Protection Project

Person handling approval

Project Ningbo Jiangdongnanqu WWTP and Construct South of Jiangdong

name Sewerage Project ion site District of Ningbo

Project PostProJect Cod 315400 Tel

unit

Sector L Project New Nexpansion technicalnature renovation

Construction 160000m3/d capacity Report Report

. ~~~~~~~~typecapacity t

Department for Do Timset up the project c. e

Approval National Do

department for the Environmental c.N TimProtection e

report Administration o.

Total investment 402114600 EA 402114600 100%

of the project Y investment 4

Uni toprepa Research &Design Academyte tpreport of Environmental Protection EA cost Yuanthe re port of Ningbo

EnvironmentEnvironmental quality current quality Discharge standard

status qalyDshresadrstandard

Ambient Conforms to Class II of GB3095-1996 GB9078-1996 Class II

air Ambient air Class II

Surface Exceeding GB3838-2002 GB3838-2002 GB8978-1996 Class II

water Class IV Class IV

Groundwater

Noise Conforms to GB3096-93 GB3096-93 GB12348-90 Class

N Is Class3 standard Class 3 III

Pollution control indicators

236


Treat Perment mrse

Gene rent Substit Discha Permis Regi Conce Ptje iblerated tion ute old rge Total sible onal ntrac ction disc

Existi volu with increa dischContr m volu discha discha reduc n prior harg

ol disncgha n me in reducti rseduce rge rge e to aonge eitem newl volum volum volu treatm conc

rge (1) Y Y on volum e e•, e me ent ntrati entrbpuairlt built volu4)m e (6) (7) (8) (9) On atio

(2) part (10) n(3) (11)

Waste 0 5840 0 0 5840 5840

water

CdLead = = = ===Arsenic _ _

Sexavalen

t

chrome

Cyanide__ _ __ _

COD 0 9373. 2365. 0 7008 70082 2 _

oilWast

e as502 = =_ __ __ = =

DustSmok

eSolidwaste 0 8.9 0 0 8.9 8.9

s.

Unit : waste gas volume X104 M3/Y; waste water, solid wastes: 104t/y;Hg, Cd, lead, arsenic, sexavalent chrome, cyanide: 103/y; others: t/y

waste water concentration: mg/L; waste gas concentration: mg/m3;

237


Note: The form to be filled in by EA unit attaching in the last page of the report The

last case of the form is the character pollutant of the project, of which : (5)=(2) -

(3) - (4) : (6) = (2)-(3)+(1)-(4)

238

Documents

Environment Impact Assessment Report for N i ngbo J i ...documents1.worldbank.org/curated/en/954681468769260060/pdf/multi0page.pdfNingbo is one of the earliest coastal cities opening