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1 Foreword

Guilin Integrated Environment Management Project of the World Bank Funded

Comprehensive Environment Impact Assessment Report

Prepared by:The Environment Protection Science Academy of Guangxi Zhuang Autonomous Region

Certificate No.:Guohuanpinzheng Jiazi No. 2902

Date:

June 2014

Table of Contents

1Abbreviations

21 Foreword

21.1 Overall Background of the Project

31.2 Overview of the Comprehensive Environment Assessment Report

51.3 Scope and Time Section of Environment Assessment, and the Environment Protection Targets

71.4 Environmental Impact Factors and Assessment Factors

91.5 Environmental Policy and Rule Documents

142 Project Descriptions

142.1 Project Composition, Investment and Implementation Schedule

182.2 Project Investment and Fund Raising

182.3 Technical Features

442.4 The Project Organization Agencies & Implementation Agencies

452.5 Due Diligence Study of the Linked Projects

473 Current Environmental & Social Status

473.1 Overview of the Natural Environment

523.2 Social Overview

543.3 Current Status and Plan of Water Supply

583.4 Current Status and Planning of Drainage System

673.5 Current Sludge Disposal Status and Plan

713.6 Survey and Assessment on Current Environment Quality

973.7 Major Environmental Sensitive Points

1024 Environmental Impact Assessments

1024.1 Environmental Impact of Construction Period

1144.2 Environmental Impact Analysis in the Operation Period

1264.3 Environmental Risk Assessment

1294.4 Accumulated Impact Analysis

1314.5 Long-term Impacts of Sludge Utilization

1334.6 Application of World Banks Environment, Health and Sanitation Guidelines

1365 Public Participation and Information Disclosure

1365.1 Purposes, Methods and Scope

1365.2 Information Disclosure

1445.3 Public Participation Survey

1596 The Analysis of the Alternative Options

1596.1 Purposes and Principles of Comparative Analysis

1596.2 Zero Option Analysis

1616.3 The Analysis of the Alternative Options of Water Supply Component

1616.4 Analysis of the Alternative Options of the Drainage Component

1686.5 Comparative Analysis of Sludge Disposal Options

1747 Environment and SOcial Management and Monitoring Plan

1747.1 Environmental Management Plan

1757.2 Environmental Impact Mitigation Measures

1757.3 Environment Monitoring Plan

1767.4 Environment Management Training Plan

1777.5 The Reporting Mechanism for the EMP

1748 Environmental and SOcial Management FRAMEWORK FOR SLUDGE DISPOSAL COMPONENT

1748.1 Location Criteria

1758.2 EIA Perparation

1758.3 Public Participation

1768.4 Approval and Implementation

1809 Conclusions

Abbreviations

(1) DC: Drainage Company

(2) DRC: Development and Reform Committee

(3) EA: Environment Assessment

(3) EHS: Environment Health Safety

(4) EIA: Environment Impact Assessment

(5) EP: Environment Protection

(6) EPA: Environment Protection Ageny

(7) EPB: Environment Protection Bureau

(8) PIU: Project Implementation Unit

(9) PMO: Project Management Office

(10) PS: Pumping Station

(11) WSC: Water Supply Company

(12) WWTP: Wastewater Treatment Plant

1 Foreword

1.1 Overall Background of the Project

1.1.1 Significance of the Project

Guilin is a world famous scenic tourist city and a famous historic and cultural city. The city is located in the northeast of Guangxi Zhuang Autonomous Region, at the south end of Hunan-Guilin Corridor, and borders Hunan Province in the east and north. Hunan-Guilin Railway runs through the Lijiang River, Guizhou-Guangzhou Express Railway in construction passes through the whole city, and national highways 321, 322 and 323 pass by the city. Located at 10936~11129 east longitude and 2415~2623 north latitude, the city has an average latitude of 150m, and its north and south sides have a common boundary with Hunan Province, its west and southwest sides are connected with Laibin City, and its south and southeast sides are connected with Wuzhou City and Hezhou City.

At present, Guilin has a population of around 750,000 in downtown area, and a financial revenue of around RMB Y12 billion. According to the spirit of the Decision on Accelerating to Promote the Leap-forward Development of the Autonomous Regions Urbanization and the supporting document (GZ [2011] No. 30) and the Outline of Overall Urban Planning of Guilin (2010-2020) promulgated by Guangxi Zhuang Autonomous Region Party Committee and Peoples Government, Guilin will grow into a megalopolis with an urban population of up to 12,000,000, and completed urban area of around 100 km2 in the upcoming 5 years. In order to realize this objective, we must strengthen the construction of municipal infrastructure, provide guarantee for the citys development, and raise the bearing capacity of infrastructure.

According to the Statistical Yearbook 2008-2012 of Guilin, the tourist population in the city increased from 8,577,000 persons in 2008 to 13,610,000 persons in 2012, maintaining a growth rate of 8%~19%, and annual average growth rate of 11.67%. Obviously, the tourist population in urban area of Guilin has grown stably year after year. The master planning determines the nature of this city to be: an international scenic tourist city, national famous historic and cultural city, Chinas landscape city, and regional center city in the north of Guilin and in surrounding areas. Along with the constant perfection of urban construction and supporting service facilities, as well as the expansion of Liangjiang International Airport, tourist population will further grow in future.

According to the Communique of Guilin Environmental Status 2012, the water quality of the Lijiang River was good in Xingan County section, Lingchuan County section, urban area section, and Yangsuo County section etc. The concentration of pollutants was at a relatively low level, and various monitoring and assessment indicators were completely up to standard. The water quality of other trunk and branch streams was also up to standard. As concerning the water quality of the citys centralized drinking water sources, except for coli group which was out of standard at different levels, other monitoring and assessment items were up to national class I-III surface water quality standards. As concerning the water of scenic lakes and ponds in urban area, except for that total nitrogen and total phosphor exceed the protection criteria of Class-IV water function areas, the other assessment items were up to protection criteria. Except for Fanglian Pond of which the water nutrition status was of lightly eutrophic, the other five lakes and ponds had intermediate nutrition of water. Along with urban construction and the increase of population and tourists, pollutants will increase constantly, so the control of water environment pollutions is still a key work.

Guilin will use the World Bank loan for the integrated environmental management project, including water supply component, wastewater and sludge component, water environment monitoring and pollution control components, in order to raise the development level of water supply and environmental health service in Guilin, improve the investment environment of Guilin still better, promote the accelerated development of the urban and rural economic society of Guilin, and produce good social benefit, environmental benefit and economic benefit. Guilin is an under-developed western city, and has weak industrial foundation, limited financial revenue, and shortage of fund, therefore it has extremely important significance to construct infrastructure, strengthen comprehensive environmental renovation, and improve ecological environment by making use of the loan of the World Bank.

1.1.2 Contribution of the World Bank

The World Bank has ever had good cooperation with Guilin in terms of urban environment construction, and made positive contributions to improving some urban environmental infrastructure and raising the level of urbanization.

From 1998 to 2008, investments of RMB Y414 million were completed for the Comprehensive Environmental Renovation of Lijiang River in Guilin --- a World Bank Financed Project in Guilin, including USD22.97 million World Bank loan. The project is divided into four types, namely wastewater treatment, water supplementation to the Lijiang River, community improvement, and institution strengthening.

Under the comprehensive environmental renovation project of the Lijiang River in Guilin, Qintan trunk wastewater pipe project and supporting project have been completed, and up to 4.9km rain-wastewater pipeline and Mantoushan Wastewater Pumping station have been constructed in Qintan area; Guihu Lake, Ronghu Lake and Shanhu Lake have been subject to dredging, wastewater interception, and water diversion into lake; 2630hm2 artificial forest has been constructed within 10km scope at both banks of the Lijiang River with the seedling, fertilizers and other goods purchased with the World Bank loan; around 38km protective riverbanks have been constructed at both sides of the Lijiang River section. The better projects, like Tiexi Residential District and Yangsuo Residential District, etc. in Xiangshan District have also been completed. In addition, a batch of projects has been completed, including Beichong Wastewater Collection System, Urban Garbage Transport System, Wulixia Lijiang River Water Supplementation, Lingui Wastewater Collection System Pipeline Network, and Yangsuo Basha Oxidation Pond, etc. The completion of these projects have extremely greatly improved the environment status of Lijiang River, and actively promoted the development of tourism industry in Guilin.

1.2 Overview of the Comprehensive Environment Assessment Report

1.2.1 The Objective of Environmental Assessment

In accordance with the regulations of the Environmental Impact Assessment Law of the Peoples Republic of China, the Regulations on the Administration of Construction Project Environmental Protection, and the Notification on Strengthening Environmental Impact Assessment for Construction Projects with Loan of International Financial Organizations, and the requirements of the World Bank Safeguard Policies, as well as domestic and the World Banks environmental impact assessment procedures, the project gives comments on the positive environmental impact brought about by the implementation of this project, identifies, screens, predicts and analyzes the possible negative impact, brings forward pertinent and effective mitigation measures and environment management plan aiming at unavoidable major negative impacts, provides an evidence for the World Bank to independently assess the project, and provides an evidence for the decision making and management of the governments comprehensive management and environment management department.

1.2.2 Category and Assessment Grade of the Comprehensive Environment Assessment Report

In accordance with the regulations of the Notification on Strengthening Environmental Impact Assessment for Construction Projects with Loan of International Financial Organizations (HJ [1993] No. 324 Document)issued by the ministries and commissions including the State Environmental Protection Administration, etc., and the regulations of the World Banks Safeguard Policies OP4.01 Environmental Assessment, and combining with the identification and screening result of environmental assessment factors for the project, we have determined that, the environmental assessment of the project is of Category A.

Therefore, the contents and scope of this comprehensive environment assessment (CEA) report is based on the requirements for Category A projects. For the grading of project EIA, please refer to Table 1.2-1.

The basis for determining the EIA grading are shown as below:

(1) HJ/T2.2-2008 Technical Guidelines for Environmental Impact Assessment ---Atmospheric Environment

(2) HJ/T2.3-93 Technical Guidelines for Environmental Impact Assessment ---Surface Water Environment

(3) HJ/T2.4-2009 Technical Guidelines for Environmental Impact Assessment --- Acoustical Environment

(4) HJ/T19-2011 Technical Guidelines for Environmental Impact Assessment --- Non-polluted Ecological Impact

Table 1.2-1 Work Grade of Environmental Impact Assessment for Each Component

No.

Component name

Atmospheric Environment

Surface Water Environment

Acoustical Environment

Non-polluted Ecology

1

Water supply component

Grade three

Grade three

Grade three

Brief analysis

2

Wastewater component

Grade three

Grade three

Grade three

Brief analysis

3

Sludge disposal component

Grade three

Grade three

Grade three

Brief analysis

*Note: Brief analysis is just to briefly analyze, but not quantitatively predict, the environmental impact, since the assessment work is of grade three for the project according to the recognition result of environmental impact, and the regulations of the Technical Guidelines for Environmental Impact Assessment.

1.2.3 Preparation for Comprehensive Environmental Assessment Report

Guilin World Bank Financed Integrated Environment Management Project Management Office (hereinafter called PMO) , after executing related procedures like project survey and capability assessment, etc., has entrusted Scientific Research Academy of Guangxi Environmental Protection (SRAGEP) to prepare the Comprehensive Environmental Assessment (CEA) Report on the Guilin Integrated Environmental Management Project with the World Bank Loan.

After accepting entrustment, the assessment unit has collected, sorted out and researched related materials, surveyed the proposed construction site for some components and surrounding environmental status, carried out preliminary analysis on each components construction nature, content, scale, process, main polluting factors, and possible environmental impact, etc., and prepared the Comprehensive Environmental Assessment Report on the Guilin Integrated Environmental Management Project with the World Bank Loan in accordance with Chinese Technical Guidelines for Environmental Impact Assessment, and the detailed regulations on environmental assessment in the World Banks Safeguard Policies.

1.3 Scope and Time Section of Environment Assessment, and the Environment Protection Targets

1.3.1 Scope of Environmental Assessment

The comprehensive EIA of this project are:

(1) According to the requirements of the Technical Guidelines for Environmental Impact Assessment, and based on the proposed grade of assessment work, each components assessment scope is taken as the basic scope of integrated environmental assessment for this project;

(2) If some environmental protection target (sensitive point)or any target cared by the World Banks safeguard policies is close to the basic assessment scope, they shall be taken into the assessment scope;

(3) The elements and matters having direct relevance with or potential impact on the project (such as the dams in the upstream and downstream of the river, the ground water structure unit, and the material cultural resources with certain historic value, etc.) shall be taken into assessment scope;

The EIA scope for various types of components is as shown in Table 1.3-1.

Table 1.3-1 Basic scope of Environmental Assessment for the Project Components

No.

Component type

Assessment scope

Air

Surface Water

Ground water


Non-polluted Ecology

1

Water Supply Network & Boosting PS

The proposed booster pump station site, and 300m at both sides of pipeline during construction period

The assessment scope is determined according to project characteristics and environmental function of receiving water body.

The same ground water structure units in the vicinity of the proposed factory site and at both sides of pipeline

200m in the vicinity of the site of booster pump station site, and 50m at both sides of pipeline

200m in the vicinity of the site of booster pump station site, and 50m at both sides of pipeline

2

WWTPs, Wastewater Network, & PSs

1km in the vicinity of proposed factory site, and 300m at both sides of pipeline during construction period



200m in the vicinity of the proposed factory site, and 50m at both sides of pipeline during construction period

200m in the vicinity of the proposed factory site, and 50m at both sides of pipeline during construction period

4

Sludge Disposal

100m at both sides of sludge transportation line, and 2.5km in the vicinity of the site of sludge disposal factory



Sensitive points at the boundary of and in the vicinity of the factory area, and along the sludge transportation line

100m at both sides of sludge transport line, and 2.5km in the vicinity of the sludge disposal factory site

1.3.2 Time Section of Environmental Assessment

The comprehensive environmental assessment report of this project mainly analyzes and assesses the two time sections, namely construction period and operation period of the project.

1.3.3 Environmental Protection Targets (Sensitive Points)

According to domestic laws and rules on environmental impact assessment, and the regulations of the World Banks Safeguard Policies, the environmental protection targets (sensitive points) cared in the environmental assessment of this project mainly includes:

(1) Special protection areas: the areas needing special protection, as regulated and planned by the country, or approved by peoples government of above county level, such as drinking water source protection zone, natural reserves, famous scenic sites, ecological function protection areas, basic farmland protection areas, key prevent and control areas of water loss and soil erosion, forest parks, geological parks, world heritage places, and key cultural relic protection units, etc.;

(2) Ecological sensitive areas: Areas in serious shortage of water, habitats of rare animals and plants, and aquatic organisms, spawning sites of fishes and shrimps, important wetlands, and natural fishing grounds;

(3) Areas of social concern: Population gathering areas, cultural education areas, centralized office areas of party and political institutions, health resorts, and hospitals, etc.;

(4) Material and cultural resources, including the existing ones, such as remarkable cultural relics, temples with historic and cultural value, local representative folk houses, ancestral halls, ancient tombs, religious monuments, cultural sites, and ancient trees, etc.

1.4 Environmental Impact Factors and Assessment Factors

1.4.1 Environmental Pollution Type Analysis

The project involves three types of components: (1) water supply component (water supply boosting pumping station and water supply pipelines), (2) drainage component (urban domestic wastewater treatment, network, and pumping station), and (3) sludge disposal type. According to different types of environmental impact, mainly the impact during construction period and operation period, they are analyzed as follows:

1.4.1.1 Water Supply Component

The pollutant generation and discharge sections of the water supply booster station and water supply pipeline mainly include:

Construction period:

(1) Waste gases: The dust raised from construction, and vehicle transportation, etc.;

(2) Waste water: Waste water during construction period mainly includes construction personnels domestic wastewater, and oil-contained waste water from construction machinery; the polluting factors are mainly CODCr, ammonia nitrogen, petroleum, and SS.

(3) Solid wastes: Building garbage, earthwork originated from excavation and filling, and construction personnels domestic garbage, etc.;

(4) Noise: Noises of construction vehicle and machinery, etc.

Operation period:

Noise: Noises from the operation of various pumps in the pumping stations.

1.4.1.2 Drainage Component

The pollutant generation and discharging sections of urban domestic wastewater treatment, pipeline network and pumping stations mainly include:






Operation period

(1) Waste water: Waste water in factory area mainly includes the supernatant of sludge thickening tank, the filtrate of sludge dewatering machine, and employees domestic wastewater. Such wastewater still contains a relatively high content of organic pollutants, and will be sent back to intake pump house through the wastewater pipeline in the factory, and then be treated over again in the wastewater treatment system.

(2) Waste gases: Waste gases mainly include the odor dissipated from wastewater treatment, and the odor emanated from sludge. The fetor discharge facilities in WWTP mainly includes grating and intake pump house, sand basin, biological reaction tank, sludge thickening tank and sludge dewatering machine room, etc.. The discharge method is unorganized discharge. The main components in odor are hydrogen sulfide (H2S) and ammonia (NH3), etc..

(3) Solid waste: The structures like regulation reservoir, sedimentation basin, aeration tank, and SBR reaction tank, etc., after operating for a period, will produce sludge, which shall be cleared out.

(4) Noise: The main high-noise equipment during operation of WWTP includes wastewater lifting pump, sludge lifting pump, air blower, etc..

1.4.1.3 Sludge Disposal Type






Operation period:

(1) Waste water: Cleaning water of sludge transport vehicles, which are cleaned at each WWTP. The waste water generated is drained into the wastewater treatment system of each WWTP.

(2) Waste gases: SO2, NOx, Dioxin, acidic gases, and foul gases dissipated from sludge.

(3) Solid wastes: Mainly employees domestic garbage.

(4) Noise: Noise generated from sludge transport vehicles.

1.4.2 Identification Result of Environmental Impact Factors

According to the above analysis, and combining with the type and characteristics of this project, the environmental impact recognized of different components is as shown in Table 1.4-1.

Table 1.4-1 Screening Result of EIA Factors for the Project Components

No.

Component type

Environmental Assessment Factors

Ecological Environment

Environmental Air

Surface Water

Ground Water


Solid Wastes

1

Water supply component

Land use, vegetation

TSP

pH value, SS, BOD, COD and NH3-Ns

-

Plant boundary noise;

Construction noise

Construction spoil,

excess sludge

2

Drainage component

Land use, vegetation

Natural habitat

Water and soil loss

TSP,, H2S, NH3, bad small

pH value, SS, BOD5, COD, NH3-Ns, TP and fecal coliform group

-

Traffic noise

Construction noise

Construction spoil,

substrate sludge

3

Sludge disposal

-

TSP, H2S, NH3, bad small

pH value, SS, BOD5, COD, NH3-Ns, TP and fecal coliform group

-

Plant boundary Noise

Construction noise

-

1.5 Environmental Policy and Rule Documents

1.5.1 Environmental Protection Laws and Rules

(1) The Environmental Protection Law of the Peoples Republic of China (1989);

(2) Law of the Peoples Republic of China on the Prevention and Control of Atmospheric Pollution (2000);

(3) Law of the Peoples Republic of China on the Prevention and Control of Water Pollution (2008);

(4) Law of the Peoples Republic of China on the Prevention and Control of Noise Pollution (1996);

(5) Law of the Peoples Republic of China on the Prevention and Control of Environmental Pollution by Solid Wastes (2004);

(6) Cleaner Production Promotion Law of the Peoples Republic of China (2009);

(7) The Environmental Impact Assessment Law of the Peoples Republic of China (2003);

(8) Law of The Peoples Republic of China on Water and Soil Conservation (1991);

(9) Land Administration Law of the Peoples Republic of China (Revised in 1998);

(10) Urban and Rural Planning Law of the Peoples Republic of China (2008);

(11)Water Law of the Peoples Republic of China (2002);

(12) Flood Control Law of the Peoples Republic of China (1997);

(13) No. 257 Order of the State Council --- Regulations on the Protection of Basic Farmland (Dec. 27, 1998);

(14) No. 253 Order of the State Council of the Peoples Republic of China --- Regulations on the Administration of Construction Project Environmental Protection (1999);

(15) No. 14 Order of the State Environmental Protection Administration --- Classified Directory for Environmental Management of Construction Project (Jan. 1, 2003);

(16) State Environmental Protection Administration (HF [2004] No. 59) Technology and Policy of Eutrophic Lakes Prevention ;

(17) Regulations on Implementing the Law of The Peoples Republic of China on Water and Soil Conservation (1993);

(18) Production Safety Law of the Peoples Republic of China (June 29, 2002);

(19) State Environmental Protection Administration (HF 2006[No. 28]) Interim Measures for the Public Participation in Environmental Impact Assessment (Feb. 14, 2006);

(20) GF2005No. 39 Decision of the State Council on Implementing the Scientific Concept of Development and Stepping up Environmental Protection (Dec. 14, 2005);

(21) Overall Emergency Preplan for National Sudden Public Incidents (2006);

(22) Regulations of the Peoples Republic of China Governing the Administration of River (1988);

(23)Water Function Zoning of Guangxi Zhuang Autonomous Region (2002);

(24) Regulations on Environmental Protection of Guangxi Zhuang Autonomous Region (2006);

(25)Regulations on Agricultural Environmental Protection of Guangxi Zhuang Autonomous Region (2006);

(26) Measures for Guangxi Zhuang Autonomous Region to Implement the Regulations on Prevention and Control of Environmental Noise of the People's Republic of China (1993);

(27) Circular of the State Council on Accomplishing the Recent Work Focus on Building a Resource Efficient Society (2005);

(28) Announcement on Issuing the Bill of Amendments to the (GB18918-2002) (2006 [No. 21] Announcement of State Environmental Protection Administration);

(29) Regulations on Cultural Relics Management of Guangxi Zhuang Autonomous Region (2006).

1.5.2 Policies on Pollution Prevention and Control Technology

(1) The Policy on Urban Domestic Wastewater Treatment and Pollution Prevention Technology;

(2) Opinions on Promoting Industrialized Development of Urban Domestic Wastewater and Garbage;

(3) The GuidanceCataloguefor Industry Structure Adjustment (2005) ;

1.5.3 The Specific Plan and Master Plan on Social Economic Development and Environmental Protection

(1) Master Plan of Guilin City (2010-2020) (Outline);

(2) Special Planning for Water Supply of Guilin City (2013~2020) (Preliminary Achievements);

(3) Special Planning for Drainage Engineering of Guilin City (2013-2020) (Preliminary Achievements).

1.5.4 Project Documents

(1) Feasibility Study Report on the World Bank Loan Project Guilin Integrated Environmental Management Project of the Central and Southern China Municipal Engineering Design & Research Institute Co., Ltd.;

(2) Project Social Assessment Study by Wuhan University

1.5.5 The World Banks Related Safeguard Policies

(1)OP/BP 4.01 Environmental Assessment;

(2)BP17.50 Information Disclosure.

(3)General Guidelines on Environment, Health and Safety

(4)Environment, Health and Safety Guidelines of Waste Management Facilities

(5)Water and Sanitation Guidelines

1.5.6 Environmental Quality Standards

(1) GB3095-1996 Ambient Air Quality Standards ;

(2) GB3838-2002 Quality Standards of Surface Water Environment;

(3) GB3096-2008 Quality Standards of Acoustical Environment;

(4) TJ36-79 Sanitary Standard for the Design of Industrial Enterprises (The Highest Permissible Concentration of Harmful Substances in the Air of Residential Areas).

The environmental quality standards and assessment factors adopted for the environmental impact assessment of each component are as shown in Table 1.5-1.

Table 1.5-1 Environmental Quality Standards & Assessment Factors by the Project EIA

No.

Standard name

Grade (type)

Assessment factors

1

GB3095-1996 Ambient Air Quality Standards

Grade two

TSP, SO2, NO2

2

TJ36-79 Sanitary Standard for the Design of Industrial Enterprises

-

H2S, NH3

3

GB3838-2002 Quality Standards of Surface Water Environment

Class ,

pH value, SS, dissolved oxygen, permanganate index, BOD5, Nh3-N, volatile phenol, arsenic, mercury, hexavalent chrome, lead, cadmium, petroleum, total phosphorus, anionic surface active agent, fecal coliform group

4

GB3096-2008 Quality Standards of Acoustical Environment

Class 2

Equivalent sound level

1.5.8 Pollutants Discharge Control Standards

(1) GB16297-1996 Integrated Emission Standard of Air Pollutants ;

(2) GB14554-93 Emission Standard for Odor Pollutants ;

(3) GB8978-1996 Integrated Waste Water Discharge Standard ;

(4) GB18918-2002 Discharge Standard of Pollutants for Municipal WWTP;

(5) CJ3082-1999 Discharge Standard For Municipal Sewerage System

(6) GB12523-2011 Noise limit for Construction Site ;

(7) GB12348-2008 Emission Standard for Industrial Enterprises Noise at Boundary ;

(8) GB18599-2001 Standardsfor Pollution Control on the Storage and Disposal Site for General Industrial Solid Wastes;

(9) GB 5085.3-2007 Identification Standardsfor Hazardous Wastes- Identification for Extraction Toxicity

The pollutants discharge control standards and assessment factors adopted for the environmental impact assessment of the project are as shown in Table 1.5-2. For the detailed limiting value of each standard executed, please refer to the 3.4 of the report, and 1 of Environmental Management Plan.

Table 1.5-2 The Pollutants Discharge Control Standards & Assessment Factors by the Project EIA

No.

Standard name

Grade (type)

Assessment factors

1

GB16297-1996 Integrated Emission Standard of Air Pollutants

Unorganized emissions

TSP

2

GB14554-93 Emission Standard for Odor Pollutants

Grade two

H2S, NH3, odor

3

GB8978-1996 Integrated Waste Water Discharge Standard

Grade one, grade three

pH value, SS, COD, BOD5 NH3-N, anionic surface active agent

4

GB12348-2008 Emission Standard for Industrial Enterprises Noise at Boundary

Class II


5

GB12523-90 Noise limit for Construction Site

-


2 Project Descriptions

2.1 Project Composition, Investment and Implementation Schedule

2.1.1 Project Composition

Component 1: Guilin City Water Supply Network

The purpose of this component is to meet the increasing water demand for production and domestic use in the urbanization process; and lift the reliability of urban water supply safety for Guilin City. The main engineering contents are: (i) Build a new DN500-DN1600 water supply network with a total length of 37 km; (ii) Build a new boosting pumping station in Jichang Road (40,000 m3/d in the short run); (iii) Procure instruments for water quality monitoring and equipment for routine network overhauling so as to lift the urban water supply safety; (iv) Set up the comprehensive water supply operation platform.

Component 2: The Upgrading of the City Wastewater Treatment Plants, Drainage Pumping Stations, and the Urban Drainage Network

The purpose of this component is to improve the efficacy of the WWTPs and the drainage pumping stations so as to ensure the working and highly efficient operation of the WWTPs and the pumping stations; improve the wastewater collection rate; reduce the energy consumption for treatment; and mitigate the impact of the treatment facilities to the ambient environment. The main contents are as follows:

1. The Upgrading of the Urban WWTPs

The component is to upgrade the existing WWTPs with higher standard; renew some equipment; and renovate the deodorization and sludge dewatering facilities. Specifically: (i) Upgrading Shangyao WWTP with a treatment capacity of 145,000 m3/d, including raising the treatment standard, renewing some treatment plants, and renovating the odor collection and treatment, and sludge dewatering facilities; (ii) Upgrading Qilidian WWTP with a treatment capacity of 60,000 m3/d (the treatment capacity will be reduced from 60,000m3/d to 45,000 m3/d), including raising the treatment standard, renewing some treatment plants, and renovating the odor collection and treatment, and sludge dewatering facilities; (iii) Upgrading Beichong WWTP with a treatment capacity of 30,000 m3/d, including raising the treatment standard, and renovating the inlet pumping station; the odor collection and treatment, and sludge dewatering facilities; (iv) Upgrading Yanshan WWTP with a treatment capacity of 20,000 m3/d, including raising the treatment standard, and renovating the odor collection and treatment facilities; and (v) the deodorization of the bio-tank of Lingui WWTP with a treatment capacity of 30,000 m3/d.

2. The Upgrading of the Drainage Pumping Stations in the Urban Areas

It includes the renovation of the equipment (screen, water pumps, electrical and auto regulation) and the odor collection and treatment of 18 existing wastewater pumping stations and 2 storm water pumping stations

3. The Upgrading of the City Drainage Network

This mainly includes: (i) patching or renewing the wastewater gravity pipes of DN300~DN120 over a total length of 34.6 km in the urban area of Guilin (including manholes); patching or renewing the wastewater pressure pipes of DN600 over a total length of 5.5 km in the urban area of Guilin; (ii) building new wastewater pipes of DN500~DN800 over a total length of 1.7 km in Eastern Block of Bali Street Lingchuan; and (iii) building new sewer pipes for DN300~DN1200 over a total length of 12.3 km long in the old town of Lingui.

4. Equipment for Water Quality Monitoring and Network Management and Maintenance

The purpose is to strengthen and lift the performance of Guilin Municipal Drainage Company on water quality (including sludge) monitoring and maintenance of the drainage network. It includes: (i) procuring water quality (including sludge) monitoring equipment for daily monitoring and management; (ii) procuring pipe maintenance equipment, including detecting (including intelligent robot and detecting system), blocking and dredging equipment; and (iii) conducting survey of the drainage network and establishing network information system for the daily maintenance and management.

Component 3: Sludge Disposal Plant

The purpose of this component is to ensure the disposal of the sludge generated at the WWTPs is in a non-hazardous and recycling way. The design for sludge disposal includes 130t/d of sludge for composting and 20t/d for solar drying. The dewatered sludge from all WWTPs of Guilin city will be put together to be disposed either through composting or drying and finally be used for landscaping.

Component 4: Water Environment Monitoring and Pollution Source Management Information System (MIS) of Guilin City

The main contents of this component are: (i) establishing and improving Guilin water

environment monitoring MIS; (ii) establishing pollution source MIS for the environmental protection authorities; (iii) conducting a pollution source analysis study for the pollution source catchment areas of Lijiang Basin (Guilin Urban Area)

Component 5: Capacity Building and Project Implementation Support

The component includes: (i) hiring professional consultant (firm) to help the PMO with project management, including reviewing the detailed design and bidding documents, project management, construction supervision and management, monitoring the implementation of social and environmental safeguard measures, establishing the project monitoring and evaluation (M&E) system, evaluating, reporting and preparing the project completion report; (ii) conducting training on the PMO and the project implementation units (PIUs) staff and organizing the study tours concerned; and (iii) procurement of the office equipment/facilities for the PMO and PIUs.

The distribution of project components may be referred in Fig 2.1-2 on next page.

2.2 Project Investment and Fund Raising

The physical investment of this project is RMB Y 846.48 million; the price contingency is RMB Y 47.90 million; the interest during the construction period is RMB Y 53.31 million; the front-end fee is RMB Y 1.51 million, and the working capital is RMB Y 5.55 million. The total project investment is RMB Y 954.74 million. Specifically described as follows: The investment for water supply network is RMB Y 221.08 million; the first part for construction is RMB Y180.46 million; and RMB Y 20.52 million for the second part for construction miscellaneous. Contingencies (project reserve fund) amount to RMB Y20.10 million.

The investment for upgrading the WWTPs and PSs in the urban area, and city drainage network is RMB Y 492.34 million ,the first part cost for construction is RMB Y401.44 million ; and RMB Y 46.14 million for the second part as construction miscellaneous and the contingency (project reserve fund) of RMB Y 44.76 million. The investment for sludge disposal is RMB Y 114.00 million, the first part cost for construction is RMB Y 85.84 million; and RMB Y 17.80 million as the second part for construction miscellaneous and the contingency (project reserve fund) is RMB Y 10.36 million

The investment for water environment monitoring MIS and pollution source MIS is RMB Y 7.00 million.

The investment for capacity building and project implementation support is RMB Y 12. 06 million.

The project financing plan is as follows:

1US $ 100 million from the World Bank loan (equivalent to RMB Y 603.00 million , (exchange rate: US$ 1=RMB Y 6.1357; deducting front-end fee RMB Y 1.51 million , the actual funding required is RMB Y 601.49 million .

2Domestic funds amounting to RMB Y 351.74 million. The domestic funds will be provided from the local finance, which meets the relevant regulations of the State Council and can meet the requirement of the World Bank on project funding.

2.3 Technical Features

2.3.1 Water Supply Engineering

2.3.1.1 Process Design for the Boosting Pumping Station

The boosting pumping station (PS) of Airport Road is to supply water to Lingui New Area with a capacity of 80,000m3/d. The equipment selected for the short-run is for the water supply capacity of 40,000m3/d. The boosting PS is composed of one clean water tank, one boosting pumping house, one Chlorination room and Chlorine storage room, and one power transformation and distribution room etc.

1. Clean Water Tanks

As per the Code, GB 50013-2006, the volume of the clean water tank could be defined as 10%~20% of the designed maximum water supply quantity of the water supply plant: 8.010410%~20%=8000~16000 m3. Considering the land use scope of the PS, two sets of clean water tanks are designed; in which, the plan dimension of 1# tank is 54.8565.2m with 4.0 m effective water depth and 14,000 m3effective volume and that of 2# tank is 4.8597.2m with 4.0 m effective water depth and 21,000 m3 effective volume. The clean water tanks are reinforced concrete structure.

2. Boosting Pumping House

The civil works of the boosting pumping house is designed with a water supply capacity of 80,000m3/d, with hourly variation coefficient as 1.35 for Year 2025 and 1.3 in the long run. The plant is installed, for the short run, with a capacity of 40,000m3/d. In order to satisfy the network pressure variation, all pumps are driven by variable speed drives. Besides, as there is still some extra pressure remaining for the pipeline from Chengdong Area to the boosting PS at Jichang Road, an in-line pump (piping pump) will be installed in the boosting PS so as to directly increase the network pressure but to avoid energy waste due to a pressure break. Apart from the in-line pump, all boosting pumps will be selected as the type of horizontal shaft, double suction, split casing centrifugal pumps. 3 pumps will be installed for the short run. A suction chamber will be constructed on the north side of the PS with net plan dimensions 24.0m 5.0m and depth 7.60m, of reinforced concrete structure.

3. Power Transformation & Distribution Room

The power transformation & distribution/control room is above ground and combined with the pumping house. Its plan dimensions are 29.8m11.8m with a net height of 8.5m and of brick-concrete structure.

4. Chlorination Room and Chlorine Storage

The inflow of the boosting PS to be built in Jichang Road mainly comes from Chengbei Water Treatment Plant (WTP) and Shangyao WTP. Chengbei WTP is about 14 km away from the boosting PS of Jichang Road, and the distance from the PS to the farthest point of Lingui is more than 10 km. In order to ensure there is Chlorine remained at the pipe end of the water supply network within the water supply scope of Lingui New Area, Chlorination facility is installed at the PS of Jichang Road.

5. Supporting Buildings

The main building is a comprehensive admin one, and within the building, there are watch room, staff lounge, bathroom, and machine repairing room. As Guilin Municipal Water Supply Company is planning to set up the control center for the WTPs and all boosting PSs in Jichang Road PS, a central control room is reserved within the PS. The total area covered by the comprehensive building is 1800m2, of frame structure.

2.3.1.2 Engineering Design of the Water Supply Network

The project will fund a new pipeline network designed to serve the water supply area of Chengbei WTP, Phase II, which used the domestic funding to construct and is not in the project, but a linked project. The due diligence report for the linked project are referred to in Section 2.4. According, the capacity of Chengbei WTP, to be built under phase II, has been determined from extensive hydraulic modeling. The main pipes associated with the WTP are identified as follows.

1. The construction of Chengbei WTP will be implemented in stages. For the time being, two DN1200 trunk pipes have been built. New water supply pipes will be constructed to supply water to the Lingui New Area, Bali Street Area, Tieshan Residential Cluster, and Yanshan Residential Cluster. . As the newly increased water supply quantity is mainly located in the west and south parts, the outlet trunk pipes will be laid southward. One DN1600 pipe from the WTP will be laid along Weiyi Road Chunjiang Road to the intersection of Eastern 2nd Ring Road. This pipe is the outlet pipe for Beicheng WTP Phase II with a water transport capacity of 200,000m3/d, which will transport the water to the Eastern and Western 2nd Ring Road. This pipe is proposed to be included in the project to be funded by the World Bank.

2. Once Chengbei WTP is expanded to the capacity of 300,000m3/d, in order to guarantee the water supply in Lingui New Area, it is proposed to construct a DN1600-DN1200 trunk pipe along Eastern 2nd Ring Road (to the west of Chunjiang Road Intersection) Western 2nd Ring Road, which will, within a certain period of time in the future, be the trunk pipe for the Western Area, and the final capacity will be 100,000m3/d. Almost no distribution pipe is designed to be connected with this trunk pipe, and the pipe will be constructed in parallel with the construction of Western 2nd Ring Road. This pipe is proposed to be constructed with self-raised funds.

3. Construct a DN1200 trunk pipe along Eastern 2nd Ring Road (to the east of Chunjiang Road Intersection) to the south of the city. This pipe will serve as the trunk pipe for transporting water from Chengbei WTP to the east of Lijiang and the south area of the city. This trunk pipe is listed into the project to be funded by the Bank.

4. Construct a DN800 trunk pipe along North Binjiang Road (to the south of 2nd Ring Road). This pipe will connect the DN1200 trunk pipe in the Eastern 2nd Ring Road with the trunk pipe of the WTP in Dongzhen Road so as to ensure the water supply safety in the center of the old town. This pipe is proposed to be built with self-raised funds.

5. Construct a DN600 trunk pipe along North Yangjiang Road, which will connect with the DN1600 trunk pipe in West 2nd Ring Road. This pipe is one of the channels that supply water from Chengbei WTP to Lingui, and the main distribution pipe to the west of Dongcheng Area. This pipe is proposed to be built with self-raised fund.

6. Construct a DN500 trunk pipe along South Yangjiang Road, which will connect with the trunk pipe of Wanfu Road and Cuizhu Road, and improve the water supply safety for the boosting PS from the center urban area to Wanfu Road. This pipe is proposed to be built with self-raised funds.

7. Construct a DN600 trunk pipe along Chuandong Wu Road (to the north of Weiyi Road Intersection). This pipe will transport water from Chengbei WTP to the eastern area of Bali Street and would provide water safety to this area. This pipe is listed into the project to be funded by the Bank.

8. Construct a DN500 trunk pipe along Chuandong Er Road (to the north of Weiyi Road Intersection) northward. This pipe will be the distribution pipe from Chengbei WTP to the Bali Street area. It is listed into the project to be funded by the Bank.

9. Construct a new DN1200 trunk pipe along South 2nd Ring Road to connect East 2nd Ring Road and the trunk main from Wayao WTP so as to increase the water supply safety in the south urban area. This pipe is listed into the project to be funded by the Bank.

10. From the trunk pipe of Beichen Road, construct a DN500 distribution pipe from Bading Road to West 2nd Ring Road to transfer water to Dingjiang Industry Park and the High Speed Railway Area. This pipe is proposed to be built with self-raised funds.

11. Construct a DN600 trunk pipe along Jichang Road to supply water to Liangjiang Airport and its periphery area, with a capacity of 10,000 m3/d in the short run and of 18,000m3/d in the long run, meanwhile taking the newly increased water demand from the West of Lingui Road along the Airport Road into consideration. Once this pipe is built and put into operation, the self-built water plant of the airport will be used as stand-by or supplementary water supply facilities. This pipe is listed into the project to be funded by the Bank.

12. The existing DN400 water pipe of Hengtang Road is concrete pipe and will be replaced with DN500 Ductile pipe to remove the hidden danger of network leakage and also take the water demand in the future into consideration. This pipe is listed into the project to be funded by the Bank.

2.3.1.3 Comprehensive Water Supply Operation Platform

The comprehensive water supply operation platform comprises three elements: the first is the company office automation (OA) system, which will integrate human resources, material management and administrative management procedures. The second part is called computerized expert assistance decision making system, which will establish hydraulic network modeling to achieve scientific and optimized water dispatching. The third part will be business demonstration platform, which will integrate database of client data and production information. GIS based demonstration platform or GIS Data Integration (GID) system will be set up

Table 2.3-1shows the quantity of water supply network included in the water supply component of the project

Table 2.3-1 Bill of Quantity for the Network and Pumping Station

No.

Title

Size

Location

Material

Unit

Qty.

Remarks

I

Boosting PS

1

Boosting PS Airport Road

40,000m3/d, 80,000m3/d

for the long-run

Southwest, Intersection of Jichang Road & Zhongyin Road

1 set

Incl. secondary water dispatching system for boosting PSs

II

Water Supply Pipe

1

WS Pipe

DN1600

From Chengbei WTP to the intersection of Chunjiang Road & East 2nd Ring Road

Ductile Cast Iron (DCI)

m

2229

2

WS Pipe

DN1200

East 2nd Ring Road (East Nanzhou Qiao to Intersection of Guimo Road)

DCI

m

7550

3

WS Pipe

DN1200

South Ring Road

DCI

m

4810

4

WS Pipe

DN600

Chuandong Wu Road

DCI

m

2050

5

WS Pipe

DN500

Chuandong Er Road

DCI

m

2260

6

WS Pipe

DN500

Hengtang Road

DCI

m

2200

7

WS Pipe

DN600

Jichang Road (Xicheng

Avenue to Liangjiang

Airport)

DCI

m

16000

Total

m

37099

Adjusted as needed

III

Comprehensive

Water Supply Operation Platform

item

1

(Note: WS=water supply)

2.3.2 Drainage Component

2.3.2.1 Design for Upgrading the WWTP

I. Engineering Contents for Upgrading the WWTPs.

1. The Upgrading of Shangyao WWTP

Shangyao WWTP treats wastewater from the sewerage system of Mid-south areas of Giulin City. This sewerage system collects wastewater of the biggest urban scope of Guilin, covering the Central Cluster of the Old Town, Tiexi Area, Wayao Area, and Dafengshan Area. The wastewater is mainly collected via Mantoushan PS, Pingshan PS, Nanmenqiao PS, and Guniushan PS etc and pumped to Shangyao WWTP. Shangyao WWTP is divided into two plants, Phase I and II. The capacity of Phase I Plant is 45,000m3/d and the effluent treated is of Grade I Level B; whereas, Phase II is of 100,000m3/d, and the effluent treated is of Grade II.

According to the actual daily average effluent water quality analysis, the effluent of Shangyao WWTP Phase I meets the discharge standard of Grade I Level B. If evaluating against Grade I level A standard, the CODCr and NH3-N are basically stable and meet the standard. The highest BOD5 is 17mg/L, and 80% of samples tested met the standard. The highest TP was 2mg/L, and 67% of samples meet the standard. The highest SS is 18mg/L, and 76% of samples meet the standard. As a result, upgrading Shangyao WWTP and lifting the water quality of its effluent only needs to add a simple filtration unit with chemical removal of phosphorous, then the effluent could meet the standard of Grade I Level A.

The old plant of Shangyao WWTP was renovated in 2008 and the equipments were renewed then, so no need for equipment renewal. Nonetheless, there are no deodorization facilities in the old plant (Phase I); it is therefore proposed to add deodorization in the inflow pumping house, fine screen, aeration sedimentation tank and bio-tank. Same as Phase II, in-depth treatment facilities are to be constructed. The in-depth process is: filter fabric/filtration tank + ultra-violet disinfection ditch to lift the effluent to Grade I Level A. The construction details of Shangyao WWTP are shown as follows in Table 2.3-2.

Table 2.3-2 Summary Table for Upgrading Shangyao WWTP

No.

Item

Description

1

Equipment Replacement

Replacement of screens, grit settling equipment, blowers, sludge scrapers and etc.

2

Process upgrading for higher treatment standard

Adding advanced treatment facilities as to improve the effluent quality to Level A of Grade I with capacity 140k m3/d.

3

Improvement of dewatering facilities

Construction of new dewatering facilities as to reduce the water content of sludge below 60%.

4

Deodorizing

Closing and deodorizing the facilities such as inlet pumping station, fine screens, grit settling tank, sludge dewatering

2. The Upgrading of Qilidian WWTP

Qilidian WWTP treats wastewater from the urban area to the East of Lijiang River and part of Northern Area of Guilin City. The design treatment capacity for Qilidian WWTP Phase I is 60,000 m3/d (with effluent of Grade II standard); and for the WWTP Phase II, which is under construction, the design capacity is 100,000 m3/d (with effluent of Grade I Level B Standard)

According to the actual daily average effluent water quality analysis of the Qilidian WWTP Phase I, though the WWTP executes the discharge standard of Grade II, the effluent actually meets the standard of Grade I Level B except NH3-N and TP. If evaluating against Grade I Level A standard, then SS, CODCr and TN are basically stable and meet the discharge standard of Grade I. The highest BOD is 16mg/L, with 70% of samples meeting the standard. However, TP is quite high, with an average value of 1.18mg/L, and at the Max. Value is 3~4mg/L, so only 20% of samples meet the standard; the average value of NH3-N is 6.7mg/L, and Max. Value is 22mg/L, with only 40% of samples meeting the standard. From the analysis above on the daily average water quality of the effluent, it is concluded that the effluent of Qilidian WWTP Phase I could meet the discharge standard of Grade II, but there is a relatively big gap to Grade I Level A, with TP and NH3-N being the two main indicators that cant meet the standard. Physical filtration is limited to Nitrogen and Phosphorus. For TP removal, chemical dosing and sedimentation is needed and a bio-chemical process is a cost effective way to remove these two pollutants. . Given that Qilidian WWTP Phase II is about to be completed and put into operation, there is some surplus in the total treatment capacity of Guilin. It is therefore proposed to reduce some of the capacity of Qilidian Phase I and lift the bio-chemical process effect so as to guarantee the removal effect of NH3-N and TP. Meanwhile, by upgrading and adding the physical filtration unit, plus chemical removal of phosphorus, the effluent should meet the discharge standard of Grade I Level A.

It is proposed to add rotary bio-filter in this project in order to raise the discharge standard to Grade I Level A. Moreover, deodorization of the bio-chemical tank was not considered for Phase II of the WWTP, it is proposed to construct an enclosed deodorization to the bio-chemical tank. The construction details of Qilidian WWTP are detailed in Table 2.3-3 below.

Table 2.3-3 Summary Table for the Upgrading of Qilidian WWTP

No.

Item

Description

1


Adding advanced treatment facilities as to improve the effluent quality to level A from Level B of Grade I with capacity 100k m3/d for Phase I Project.

Adding advanced treatment facilities for Phase I Project to improve the effluent standards from Grade II to Level A of Grade I.

2

Equipment Replacement

Technical renovation will be implemented to Qilidian WWTP. Existing structures will be kept as much as possible but all the equipment will be replaced. Automation control system will be added to the equipment.

3

Plant Area deodorization

Closing and deodorizing the facilities such as inlet pumping station, fine screens, grit settling tank, sludge dewatering under Phase I Project.

4


Construction of new dewatering facilities within Phase I plant area as to reduce the water content of sludge below 60%.

3. The Upgrading of Beichong WWTP

Beichong WWTP treats the wastewater of the north area of Guilin. The service area of the North Area Sewerage System starts from Guihuang Road, the Vehicle Management Station of the Traffic Police Branch of Guilin Municipal Police Bureau, at the north point, to Guanyinge in the south, from Lijiang in the east to Taohuajiang in the west with a total service area of 9.26km2. The wastewater flows into Beichong WWTP via gravity, Bianshanxiang PS, Qingfeng PS etc.

The designed daily treatment capacity of Beichong WWTP is 30,000m3/d. The WWTP was put into operation in 2005, the process is A2/O, and the discharge standard applies with Grade I Level B.

According to the actual daily average effluent water quality analysis, the effluent of Beichong WWTP Phase I meets the discharge standard of Grade I Level B. If evaluating against Grade I level A standard, the CODCr, SS and NH3-N are basically stable and meet the discharge standard. The NH3-Nstandards are met 83% of the time and the highest BOD value of the whole year is 16mg/L, meaning that 89% of the time the standard could be met. The highest TP is 2.4mg/L, meaning that the standard could be met 73% of the time. From the analysis above, it is concluded that the effluent from the Beichong WWTP could meet the discharge standard of Grade I Level B, but there is a gap to Grade I Level A. However, the three main indicators -NH3-N, BOD and TP cannot meet the standard. Therefore, in the operation process, attention should be paid to the aeration flux control, chemical dosing and settlement in order to remove TP. Thus, by upgrading and adding the physical filtration unit, plus chemical removal of phosphorus, the effluent would meet the discharge standard of Grade I Level A.

For the time being, the operation of the plant is good, but as the inflow pumping house is not designed by different zones, and there is only one coarse screen channel, so there are safety risks. Its not possible to overhaul the plant because it cannot be taken out of production. It is therefore proposed under the project, to do zoning in the inflow pumping house and add coarse screens so as to ensure the operation stability. Combining with the sludge composting and transportation need, the sludge dewatering equipment of the new plant area will reduce the water content to lower than 60%. As per the requirement for water used for landscaping for TaohuaJiang, it is proposed to upgrade Beichong WWTP to lift the discharge standard of the effluent to Grade I Level A. The construction details of Beichong WWTP are detailed in Table 2.3-4 below.

Table 2.3-4 Summary Table for Upgrading Beichong WWTP

No.

Item

Description

1

Equipment Improvement

Inlet PS will be refurbished via zoning. One coarse screen channel and screen will be added. Some equipment will be replaced.

2


Adding advanced treatment facility to upgrade the treatment standard of Beichong WWTP to Class I A with a capacity of 30,000 m3/day

3


Construction of new dewatering facilities as to reduce the water content of sludge below 60%.

4

Deodorization

Deodorizing bioreactors, sludge condensing tanks and sludge dewatering workshop.

4. The Upgrading of Yanshan WWTP

Yanshan WWTP treats the wastewater of Yanshan District with a service area of 5km2. With the designed daily treatment capacity of 20,000m3/d, the WWTP was put into operation in 2009 and uses CASS process. The effluent discharge standard applied is Grade I Level B.

According to the daily average effluent water quality analysis, the effluent of Yanshan WWTP Phase I meets the discharge standard of Grade I Level B. If evaluating with Grade I level A standard, the CODCr, SS and TN are stable and meet the discharge standard; the Max. The NH3-N value is 7.4mg/L, and meets the standard 89% of the time. The highest TP value is 1.1mg/L, and this meets the standard 24.7% of the time; The BOD5 max. value is 17mg/L, and therefore meets the standard 75% of the time. From the analysis above, it is concluded that the effluent of Yanshan WWTP could meet the discharge standard of Grade I Level B, but there is a big gap to Grade I Level A, The BOD5 and TP standards are the two main non-compliance indicators. In the operation process, attention should be paid to the aeration flux control and operating parameter; and strengthen the bio-chemical treatment effect. TP should be removed through chemical dosing and sedimentation. Thus, the upgrading and renovation should add advanced treatment unit, plus chemical removal of phosphorus, the effluent could meet the discharge standard of Grade I Level A.

In this project, it is proposed to upgrade Yanshan WWTP to lift its effluent discharge to Standard Grade I Level A. Meanwhile, Deodorization will be added in the inlet pumping station, fine screens, grit settling tanks, bioreactors, sludge dewatering workshop. The construction details of Yanshan WWTP are in Table 2.3-5 below.

Table 2.3-5 Summary Table for Upgrading Yanshan WWTP

No.

Item

Description

1


Adding advanced treatment facilities as to improve the effluent quality to level A with capacity 20k m3/d for Phase I Project.

2

Plant Area deodorization

Deodorizing the facilities such as inlet pumping station, fine screens, grit settling tanks, bioreactors, sludge dewatering workshop.

5. The Upgrading of Lingui New District WWTP

Lingui New District WWTP is expected to be completed in 2013 with a treatment capacity of 30,000m3/d. The effluent discharge standard is Grade I Level A. The WWTP treats wastewater from Lingui New District. Deodorization was taken into account at the beginning of constructing the plant, but not enclosed deodorization for bio-chemical tank. Given that the plant is located in the central area of Lingui New District, and is next to the planned road, this project will therefore include enclosed deodorization to the bio-chemical tank.

II. Advance Treatment Process of the WWTPs

According to the analysis above on the effluent water quality of the WWTPs, the following conclusions could be reached:

1Basically effluent from all WWTPs could meet discharge standard of Grade I Level B;

2Evaluating performance of all plants with the exception of Shangyao Phase II and Qilidian Phase I, against Grade I Level A discharge standard, the NH3-N is in non-compliance with the discharge standard at a high level. The BOD, SS and TP , though in non-compliance, but are within a reasonable level, so a simple physical treatment process could remove the pollutants. For Shangyao Phase II and Qilidian Phase I, careful calculation should be done on its nitrification and de-nitrification capacity when we consider the upgrading process.

As per the Design Code for Wastewater Recycling, urban reclaimed water plant should apply a basic process as: coagulation-settlingfiltrationdisinfection. This is also the basic process applied by many wastewater recycling projects home and abroad. Direct filtration process is also used in some projects with good results. As such, the design will compare the two processes: the coagulation/settling + filtration process Vs. the direct filtration process; and identify the recommendation option for the advance treatment process of the project.

Given the importance of the Lijiang River water body, the coagulation--sedimentation (settling)filtration process should be selected for the advanced treatment process for wastewater. Moreover, in terms of land use within the plant, land availability for WWTPs in the city center is rather limited, so process with less land occupation and less structures should be selected. For Beichong WWTP, Shangyao WWTP (Phase I and II) and Qilidian WWTP (Phase I), land is very limited, direct filtration process should be selected. For Yanshan WWTP, land available for upgrading is plenty and because process is CASS without settling tank, so in order to ensure the phosphorus removal effect by using chemical could reach Grade I Level A, the coagulationsettling+filtration process should be selected.

III. Process Selection of Chemical Phosphorus Removal

The basic principle for chemical removal of phosphorus is to dose chemical agent to form insoluble phosphate sediment; then remove phosphorus from wastewater via solid-liquid separation, which normally work together with bio-process. As per the location of the dosing position, there are pre(tank) dosing, post(tank) dosing, synchronous dosing and multi-point dosing.

Being divided by the bio-reactor, dosing before the bio-tank is pre(tank) dosing, dosing after the tank is post(tank) dosing. Dosing into the tank is synchronous dosing and dosing both before and after the tank is multi-point dosing.

The pre(tank) dosing puts the chemical agent in the raw wastewater, forms sediment and discharges with the primary sedimentation tank. The advantage is: it could remove certain amount of organic matter and reduce bio-treatment load. The post(tank) dosing takes place after the bio-treatment and the sedimentation formed could be separate via the solid-liquid separation device. Water quality from this is good and settling tank needs to add. Synchronous dosing position is in the outlet pipe of the primary settling tank or in the bio-reactor, the sedimentation and the remaining sludge is discharged together. Multi-point dosing position could be grit chamber, bio reactor and settling tank, which could increase the flexibility of operation.

As the existing WWTPs of Guilin city do not have primary sedimentation tanks, except Yanshan WWTP), but all have secondary sedimentation tank, in order to reduce the impact of iron salt and Aluminum Chlorohydrate to organism, post dosing should be selected so as to use the secondary sedimentation tank to do solid-liquid separation and discharge with sludge. For Yanshan WWTP, the CASS process is used, so it is appropriate to build new coagulation and sedimentation facilities and use post dosing to remove phosphorus.

IV. Selection of Chemical Agents for Phosphorus Removal

Three mineral salts could be used to remove phosphorous: calcium salt, iron salt and aluminum salt. The commonly used salts are: limestone CaOH2, aluminum sulphateAl2SO4318H2O, basic aluminum chloride (AlCl3, sodium aluminatesNaAlO2, iron trichlorideFeCl3, iron sulfateFe2SO43, ferrous sulfate FeSO4and ferrous chlorideFeCl2.

When using aluminum salt or iron salt, it mainly produces insoluble aluminum phosphate or iron phosphate, and the dosage of it is directly proportional to the TP amount. If using ferrous salt, then it needs to be oxidized to iron salt in order to achieve the maximum phosphorus removal effect. It is normally therefore not used as post-dosing polymer, but dosed into the aeration grit chamber. When using limestone to remove phosphorus, the solubility of the sedimentation produced is related to the PH value, the amount of limestone needed is therefore subject to the alkalinity of the wastewater, not the phosphorus content. Limestone, if used as polymer, cannot be used in synchronous dosing phosphorous removal process. If it is used in pre(tan)-dosing phosphorous removal, then the PH value of the effluent is high, then the PH value needs to be adjusted before the bio-treatment; if used in post-dosing, then the PH value of the effluent must be adjusted in order to meet the discharge requirement. Aluminum salt is therefore more commonly used. The widely used aluminum salts are aluminum sulphate (white alum) and basic aluminum chloride (PAC). In this project, basic aluminum chloride (PAC) is recommended as the chemical agent for phosphorus removal.

V. Selection of Deodorizing Options for WWTPs

The current deodorization methods available can be dilution, burning, absorption, chemical absorption, oxidation, nebulization, bio-treatment, and liquid atomization etc. The chemical absorption, activated oxygen ionization and bio-filters options have their pros and cons. As the chemical absorption needs raw material of sodium hydroxide and sulfuric acid, special warehouse for hazard material shall be built with high requirements for fire explosive prevention. This is not suitable for the existing plant; bio-filtration bed needs larger footprint and the operation is more difficult with higher capital investment and operation costs. Liquid nebulization and activated oxygen ionization are suitable for medium and low level odor and they can avoid the bottlenecks mentioned above; nonetheless, liquid nebulization method may need periodical purchase of the liquid, which has only a single source of supplier. This is not good for the plant operation. Therefore, in summary, the activated oxygen ionization method of deodorant is proposed for this project.

The activated oxygen ionization method emerged in recent years becomes the evolution of oxidation technology. This technology has been widely developed home and abroad. Aggregation of O2-O2+ is generated by high voltage pulsed discharge and it has strong oxidation ability to degrade the odor particles so as to achieve deodorization.

1) Activated Oxygen Effect

Activated oxygen deodorizing devices may generate high density and highly activated oxygen (a transitional status of oxygen between O2 and O3) via high voltage pulsated discharge (it may generate hundreds of billions of high-energy ions). Such ions may collide with the odor molecules and destroy the organic molecules; or high-energy activated oxygen may activate the oxygen molecules in the air to produce secondary activated oxygen. A chain reaction may be triggered and oxidation will be maintained with the energy generated from chain reaction. This will further oxidize the organic molecules to generate carbon oxide, water and other material of small molecules. The device may achieve high efficiency of deodorizing within in very short time.

The odor components will be transformed into small molecules of NOxSO3H2O after oxidation. Under the proper concentration, the global transforming ratio may reach 95% above. As the final product has very concentration of odor, it can be accepted by the ambient atmosphere. This approach is well adaptable to the purification of large air flow but medium level odor.

2) Photocatalysis

Photocatalysis is the application of new compound of nanometer technology. The principle is that photocatalysis particles will be excited by UV light of particular wave length to form electron-hole pair. With the presence of oxygen and water, the hole will degrade water on the surface of catalysis to generate free hydroxyl radicals (OH). Electrons may reduce the oxygen to activated oxygen ions, which have strong oxidation effect to oxidize the odor particles on the surface of photocatalysis into harmless substances. Hence the air purification is achieved.

VI. Selection of Advanced Sludge Dewatering Options in the Sludge Plants

It is proposed to use chamber press and filter dewatering plus low-temperature vacuum dehydration process in the project.

In this process, the sludge after being conditioned is transported into the dewatering and drying system via the feeding pump. Meanwhile the flocculent polyacrylamide (PAM) is dosed on-line and the filtrate is drained by pump and the liquid is separated from solids. During the compacting and caking stage, water contents will be further reduced and squeezed by the force of high pressure from the membrane plate. On the basis of above-mentioned processing, technology of low temperature vacuum drying provides the function of vacuum dehydration. With the completion of membrane pressing, the heating plate and membrane plate will be filled with hot water and the sludge cake will be heated in the heating chamber. Meanwhile, a vacuum pump will be started and the heating chamber will be vacuumed. The boiling temperature of water will be lowered under the negative pressure condition. The water in the cake will be vaporized. The mixture of vapor is then drawn from the chamber and the vapor will be condensed through condensation. The water will be drained periodically and exhausting air will be treated, then discharged into air. With the process of feeder filtration, membrane pressing and vacuum dehydration, water in the sludge has been adequately removed and the quantity of sludge has been significantly reduced to the greatest extent possible. The process only needs normal flocculants and no other chemicals to be added. However, the capital investment of this process is higher and heat sources will be needed for dehydration and drying. Therefore the equipment is more complicated and operation is more difficult. Hence, the operating costs are higher.

Low temperature vacuum dehydration and drying technology is the innovation to the plate-and-frame filter press. On the basis of pressing and dewatering of conventional filter press, sludge is processed through feeding filtration, membrane pressing and vacuumed dehydration, the water content has been adequately removed in the sludge case. The volume of the sludge has been decreased significantly to the greatest extent possible. The process only needs conventional polymer (PAM) and is suitable for different sizes of plants without geographical constraints. The chemicals (PAM) can be purchased conveniently. The low temperature vacuum dehydration process is well suitable for Guilin condition, thus it is proposed by the feasibility study report.

2.3.2.2 Upgrading the Drainage Pumping Stations (PS)

The urban drainage network of Guilin is divided into four areas: North Area, East Area, Mid-south Area and Yanshan District Area. The wastewater PSs are distribute as follows: 4 PSs in the North Area, 8 PSs in the East Area, 8 PSs in Mid-south Area and 2 PSs in Yanshan District Area, all together, 22 wastewater PSs. Based on the actual status of the existing drainage PSs, it is decided to upgrade 18 wastewater PSs and 2 storm-water PSs. The main details are following: (1) replace water pumps and the electric distribution box (MCC) and renew the screen bars, valves and flow meters; (2) deodorization of the PSs; (3) upgrading the automation system. Subject to the specific situation of each PS, the upgrading details may vary. See Table 2.2-6 below for the details.

Table2.2-6 Summary Table for Upgrading the Drainage Pumping Stations of Guilin

No

Areas

PSs

Location

Capacity,

(x104m3/d)

Scope of refurbishment

1

North

Qingfen PS

Northeast of Beiji Plaza

3

1.Replacement of pumps and associated MCC

2. Replacement of screens

3.Replacement of flow meter

4.Installing deodorizing devices

5.Replacement of valves

2

North

Bianshan-xiang PS

Xierli, Jiuhuashan Rd.

1.5

1 Adding one gen-set

2. Installing deodorizing devices

3

North

Guihu PS

Inlet of Guihu Lake

0.6

1.Replacement of pumps

2.Installing deodorizing devices

3. Adding automation & control system

4

East

Longyinqiao PS

By the side of Longyinqiao

4

1. Replacement of pumps and associated MCC;

2. Refurbishment of inlet and discharge pipes and gates/valves.


4. Replacement of flow-meter

5

East

Jianganlu PS

Jiangan Rd.

3

1. Replacement of 3 pumps;


3. Replacement of flow meter

6

East

Eastern Station PS

3km Road Side of Gui-Mo Highway

4


2. Adding a flow meter

7

East

Nanzhou- qiao PS

Side of Nanzhouqiao

10



8

East

Yingcaiyuan WW PS

Yingcai Science and Technology Park

l



9

East

Tieshanyuan WW PS

Tieshan Industrial Park

1



10

East

Yifenglu PS

Yifenglu (side of Jiangshanlingxiu Residential Area)

0.5



11

Central south

Yiwulu PS

Yiwulu (high school affiliated to normal university)

1.5


2. Screen replacement

3. Pump replacement

12

Central south

Anxin PS

Zhishanlu Flyover

1.5


2. Replacement of automation and control system

3. Pump replacement

13

Central south

Nanmenqiao WW PS

Courtyard of Drainage Facility Management Division, 108, Shixiaonanlu

6

1. Replacement of 5 wastewater pumps and associated MCC;

2. Replacement of screens;

3. Adding flow meter

14

Central south

Mantoushan PS

39 W Ring Rd., Entrance Gate of Municipal Administration Division

25

1. Installing deodorizing devices;

2. Replacement of check valves

3. Replacement of discharge valves;

4. Replacement of flow meters;

5. Pump replacement

15

Central south

Pingshan PS

Pingshan Rd.

5


2. Adding flow meter

3. Pump replacement

16

Central south

Guniushan WW PS

Foot of Guniushan Hill

3

1. Replacement of screens;

2. Adding deodorizing devices;

3. Replacement of flow meters;

4. Pump replacement

17

Central south

Yangjiang PS

Yangjian Campus of Normal School

0.7

1. Adding deodorizing devices

18

Central south

Wanfulu WW PS

Wanfu Rd.

4

1. Adding deodorizing devices

19

Shanghailu Storm water PS

Southwest Side of the intersection at Shanghai Rd Railway

4

1. Pumps and associated MCC replacement;


20

Minzulu Storm water PS

Minzu Rd

9

1. Pumps and valve replacement;


21

Remote Control Unit for PSs

(Note: WW=Wastewater)

2.2.2.3 Wastewater Network Components

1. The Upgrading of the Urban Drainage Network

It is proposed to rehabilitate the drainage pipelines of 40 km long with the non-dig lining curing technology in this project.

Because the roads are located at the urban built areas, in order to reduce the adverse impact of excavation to road structure, traffic and environment, the damaged pipes will be rehabilitated by non-dig technology.

The rehabilitation standards: Based on Technical Codes for CCTV and Sonar Testing and Assessment of the Public Drainage Pipes of Shanghai Municipality, Technical Codes for Drainage Pipes/Channels and Pumping Station Maintenance of Cities & Towns (CJJ68-2007, Technical Codes for CCTV and Sonar Testing and Assessment of the Public Drainage Pipes of Guangzhou Municipality, Construction, Check and Acceptance Codes of Water Supply and Drainage Pipe ProjectsGB 50268-2008. The pipes would be rehabilitated till its functions recovered.

In order to reduce the continuous change of the flow cross-section, improve the hydraulic condition, prevent the secondary damage, for the multiple structural damages in the same section of a pipe, non-dig complete unit rehabilitation should be applied.

For severe single damage where non-dig local excavation rehabilitation technology does not work, then non-dig complete unit rehabilitation technology should be applied.

For those pipes built long time ago with uninterrupted minor damages, complete unit rehabilitation will be done in order to extend their service life. And for those structural defects with severe damages which cannot be rehabilitated via non-dig technology, it is proposed to use local excavation.

See Table 2.3-7 for the drainage network upgrading details

Table 2.3-7 Bill of Quantity for the Restoration of Urban Drainage Network

No.

Road Name

Pipe Size

Unit

Qty

Notes

1.1

Qixing District

1.1.1

Hengtang Rd.

DN600

Meter

700

Restoration of manhole No. 23

1.1.2

Fuxing Rd.

DN800

m

600

1.1.3

Chuanshandong Rd.

DN1000

m

2600

1.1.4

Yingcai Rd. Hengtang Rd.

DN800

m

3000

1.1.5

The 2nd Ring Rd (E)

DN800

m

3000

1.1.6

Jiangang Rd.

DN800

m

800

1.1.7

Tieshan Rd.

DN1000

m

500

1.2

Diecai District

m

1.2.1

Fuli Rd. Area

DN400

m

500


1.2.2

Beicheng Rd., Fanghua Rd. and Zhongshanbei Rd.

DN1000

m

2600

1.2.3

The 2nd Ring Rd (E)

DN1200

m

500

1.2.4

The 2nd Ring Rd (E)

DN800

m

1000

1.2.4

Bianshan Lane Area

DN600

m

500


1.2.5

Liumashan Rd.

DN500

m

300


1.2.6

Yiwu Rd (Machine Tools Plat area)

DN500

m

400


1.3

Xiufeng District

m

1.3.1

Jiuganglin Rd

DN300

m

1000


1.3.2

Jiuganglin Rd.

DN400

m

1200


1.3.3

Ludie Rd.

DN500

m

650


1.3.4

Ronghubei Rd.

DN400

m

800


1.3.5

Wencai Rd.

DN400

m

1000


1.3.6

Xinzhongyin Rd.

DN500

m

1500


1.4

Xiangshan District

1.4.1

The 3rd Ring Rd (S) at the backdoor of Military College

DN800

m

500

1.4.2

Wanfu Rd. (Xiangshan section)

DN600

m

1500


1.4.3

Kaifeng Rd.

DN500

m

1000


1.4.4

Kaifeng Rd.

DN1000

m

1000

1.4.5

Kaifeng Rd.

DN1200

m

200

1.4.6

Jingping Rd. Area (Lane 1, 2 and 3 of Wayao Rd)

DN500

m

500


1.4.7


DN800

m

100

1.4.8


DN400

m

500


1.5

Yanshan District

DN1000

m

3100

1.6

Pressure Pipes

m

1.6.1

Kaifeng Rd Pressure Pipe

DN600

m

5000

1.6.2

Qingfeng Pressure Pipe

DN600

m

500

1.7

Other areas (Lingui section)

m

1.7.1

Wanfu Rd. (Lingui Section)

DN800

m

2000

1.7.2

Wanfu Rd. (Lingui Section)

DN600

m

1000


Total

40050

Manhole Restoration Total 217

2. Wastewater Network Restoration of the Eastern Cluster of Lingchuan Bali Street

The network covers the eastern built areas, mainly for trade/business and residence purposes, to the east of Xianggui Railway of Bali Street, and near Lijiang with a coverage area of 5.72 km2. An underground wastewater boosting PS has been built in the eastern built area with the design flow of 10,000 m3/d; but the wastewater collection system is not good enough, and the drainage pipes of some roads discharge straight into Lijiang River which contaminates the water body. In order to solve the wastewater discharge problem in the business and residential clusters of Eastern Built Areas, it is proposed to construct wastewater pipes in Lane 5 and 6 of Bali Street and Lane 4 of Chuandong with a total length of 1.71 km to collect the wastewater and transfer to the wastewater boosting PS, then the wastewater will be pumped to Guilin Municipal WWTP. See Table 2.3-8 below for the details of the wastewater pipes to be built.

Table 2.3-8 Bill of Quantity for the Wastewater Drainage Network of the East Residence Cluster of Lingchuan Bali Street

No

Road Name

Pipe Size

Material

Unit

Qty

1

Lane 5, Bali Rd.

DN500

HDPE

m

300

2

Lane 6, Bali Rd.

DN500

HDPE

m

300

3

Lane 4, Chuandong Rd.

DN800

RC

m

1110

4

Total

m

1710

3. Wastewater Network of Lingui Old Town

More problems exist with the wastewater network of the Old Town of Lingui County. In some areas, there are no wastewater pipes and in some existing wastewater pipes, there are problems such as leakage, misplacement and silting etc. In some old streets/areas (e.g. Guikang Residential Area), the wastewater pipes are straight-line type with very small diameter, most of them are DN300, and some of them are even smaller plastic pipes of DN150-200; moreover, the burying slope is small, the pipes are blocked with other things, then silted; as a result, the discharge is not smooth and wastewater spills over everywhere. In order to improve the living environment of the residents and the collection rate of wastewater in the Old Town, it needs to supplement and improve the wastewater network, and new DN300-1200 wastewater pipes of 15.4km long will be built. See Table 2.2-9 below for the Bill of Quantity (BoQ).

Table 2.3-9 Bill of Quantity for the Wastewater Drainage Networks of Lingui Old Town

No

Road Name

Pipe Size

Material

Unit

Qty

1

Wanfu Rd.

DN800

RC

m

750

2

Xinlong Rd.

DN400

HDPE

m

300

DN500

HDPE

m

390

3

Yang Rd. No.2

DN400

HDPE

m

940

4

Yang Rd. No.6

DN1000

RC

m

720

DN1200

RC

m

770

5

Guikang Residential Area

DN300

HDPE

m

7758

DN400

HDPE

m

1200

DN500

HDPE

m

635

DN600

HDPE

m

1200

6

Jinyuan Residential Area

DN300

HDPE

m

610

DN400

HDPE

m