WWETCO

Innovative Filter Technology Tool for Reducing Energy, Expanding Capacity, Wet Weather Management and Nutrient Control

WWETCO FlexFilter™ and Bio-FlexFilter™

AGENDA

WWETCO FlexFilter™ & Bio-FlexFilter™

Multi-Use Technology Approaches

CSO Controls

SSO Controls

Phosphorous Trimming

Treatment Towards Energy Neutrality

WWETCO Technology Applications

Wet Weather

Management

Biological

Treatment

Physical

Chemical

Treatment

WWETCO

FlexFilter™ & Bio-FlexFilter™

WWETCO FlexFilter™ and Bio-FlexFilter™ Patented and Patents Pending

• Passive Down Flow Design

• No Mechanical Parts

• High Solids Loading (up to 50 lbs/day/SF)

• High Rate (5 to 20 gpm/SF)

• Multi Function Uses

– Raw Sewage Filtration (85% TSS)

– Biological Treatment (68% CBOD5)

– Chemical Floc Filtration (TP < 0.1)

• Low Backwash Water

(1% to 10%)

• Low Power Requirements

(10 to 60 KWHr/MG treated)

• Low Capital Costs

(< $0.25/gal capacity).

Influent

Influent

Influent

Effluent

Influent

Effluent

Influent

Effluent

Influent

Effluent

A porosity gradient is created by the lateral compression of the media bed.

The result is the stratification and removal of large and small particles throughout the media bed.

This allows the FlexFilter™ to treat high solids laden wastewaters including flush conditions caused by CSOs.

Influent

Effluent

Initiate Backwash

Waste

Waste

Waste

Backwash Supply

Backwash Supply

Waste

Initial Air Lifts Water Column and Cleans Fine Screens

Backwash Supply

Waste

Backwash Supply

Waste

Drain

Drain

Drain

PHOTO AFTER PRIMARY INFLUENT FILTRATION IN PREPARATION FOR BACKWASH.

FILTER IS DRAINED PRIOR TO BACKWASH.

PHOTO AFTER PRIMARY INFLUENT FILTRATION IN

PREPARATION FOR BACKWASH.

BACKWASH WATER FLOW

BEGINS , CLEANING THE TOP

PERFORATED PLATE.

Optimized Backwash by Central

Draw-off with Minimal Flow and

Short Washing Cycle

After 20 minutes, backwash is

complete, filter cell is drained to waste

and the filtration cycle begins again.

Regulatory Issues

CSOs - Comply with In-Stream Standards

Must Demonstrate – No Reasonable

Potential to Cause or Contribute

Biological Treatment Not Necessarily

Required

SSOs – Prohibitive

By-Pass Rule and Biological Treatment

Regulatory Issues

CSOs - Comply with In-Stream Standards

Must Demonstrate – No Reasonable

Potential to Cause or Contribute

Biological Treatment Not Necessarily

Required

SSOs – Prohibitive

By-Pass Rule and Biological Treatment

Primary Clarifier

Preliminary Treatment

Biological Treatment

Secondary Clarifier

Disinfection

FlexFilter™

Backwash

Wet Weather Treatment Train

Filtered Wet Weather Effluent (TSS<30 mg/l)

Wet Weather Filtration (Design Event)

Excess Wet Weather Flow (WWF)

0

100

200

300

400

500

600

1 11 21 31 41 51 61 71 81 91

TSS,

mg

/l

Filter Run Composite Tests

TSS Primary Influent Filtration - March to September 2011

Average Filter Effluent 13 mg/l

Influent

Effluent

WWETCO FlexFilter

WWETCO FlexFilter

Primary Clarifier

Preliminary Treatment

Biological Treatment

Secondary Clarifier

Disinfection

FlexFilter™

Backwash

Dry Weather Treatment Train

Secondary Effluent

Metal Salts Option for Phosphorous Trimming

Reuse Quality Filter Effluent

Tertiary Filtration

y = -0.1x + 2.2 R² = 0.9

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0 5 10 15 20

Ph

osp

ho

rou

s, m

g/l

Alum Dose (mg/l)

WWETCO FlexFilter™ Phosphorous Removal versus Alum Dose

Springfield, OH

Influent

Effluent

0 0

4.6 5.1

7.9 8.2

9.4

13.8 14.7

0

2

4

6

8

10

12

14

16

0.0

0.5

1.0

1.5

2.0

2.5

1 2 3 4 5 6 7 8 9

Alu

m D

ose,

mg/l a

s A

L2O

3

Tota

l P

hosphoro

us,

mg/l

Influent and Effluent Total Phosphorous Columbus GA Tertiary Filtration Testing Alum Added to WWETCO Filter Influent

Influent Effluent Alum Dose

Primary Clarifier

Preliminary Treatment

Biological Treatment

Secondary Clarifier

Disinfection

FlexFilter™

Backwash

Wet Weather Treatment Train

Secondary Effluent

Filtered Wet Weather Effluent (TSS<30 mg/l)

Excess Wet Weather Flow (WWF)

Tertiary Effluent

Wet Weather Filtration (Average Events)

Regulatory Issues

CSOs - Comply with In-Stream Standards

Must Demonstrate – No Reasonable

Potential to Cause or

ContributeBiological Treatment Not

Necessarily Required

SSOs – Prohibitive

By-Pass Rule and Biological Treatment

Primary Clarifier

Preliminary Treatment

Biological Treatment

Secondary Clarifier

Disinfection

Bio-FlexFilter™

Backwash

Dry Weather Treatment Train

Thickening & Anaerobic Digestion

Intermediate Wastewater Treatment

• 2 kW-Hr/MGD for Filter versus

62 kW-Hr/MGD for Aeration

• Reduced Aeration Power, or

• Increased Plant Organic Capacity

• Increased Methane Gas Production

• Up to 50% Energy Savings

• Pays for itself in < 8 years

0

20

40

60

80

100

120

140

160

180

200

1 11 21 31 41 51 61 71 81

CB

OD

5, m

g/l

Filter Run Composite Tests

CBOD5

Primary Influent Filtration - March to September 2011 Average Filter Effluent 25 mg/l

Influent

Effluent

Total CBOD5 y = 0.3154x R² = 0.499

Soluble CBOD5 y = 0.6242x R² = 0.8821

0

10

20

30

40

50

60

70

0 50 100 150 200

Effl

ue

nt

Tota

l an

d S

olu

ble

CB

OD

5, m

g/l

Influent Total and Soluble CBOD5, mg/l

Total and Soluble CBOD5 Removal

Total CBOD Soluble CBOD

Primary Clarifier

Preliminary Treatment

Biological Treatment

Secondary Clarifier

Disinfection

Bio-FlexFilter™

Backwash

Wet Weather Treatment Train

Thickening & Anaerobic Digestion

Excess Wet Weather Treatment

Provides Biological Treatment to

Excess Wet Weather Flow

Springfield, Ohio, WWTP

100 MGD WWETCO FlexFilter™

High Rate Treatment (HRT) Facility For CSO

Treatment

11-Cell Filter Matrix Single Cell

Longitudinal Section

Single Cell

Traverse Section

Office

WWETCO ½ MGD FlexFilter™ - Mobile Pilot

Closed Top Filter with Media Viewing Panels

Complete with Auto Operation Controls

Pumps, Samplers, Chemical Feed,

Variable Gravity Head Testing and

Remote Monitoring Capability

Filter

Effluent Side, End and Top

Viewing Panels

Influent

0.75 MGD WWETCO FlexFilter™

Tertiary Filter – Franklin, GA

Lamar, MO

2 MGD Wastewater Lagoon WWETCO FlexFilter™

319(h) Grant

Stormwater BMP

Columbus, GA, Vehicle

Maintenance Yard

WWETCO

Compressed

Media Filter

WWETCO

Hydraulic

Flow Control

Pretreatment

Testing under 319(h) Grant Requirements

10 MGD WWETCO FlexFilter™

Retrofit of Traveling Bridge Tertiary Filter

Manila, Philippines - Esteros Treatment - Bio-FlexFilter™

Talayan, Philippines

1.4 MGD Enhanced Primary Bio-FlexFilter™

Base

Sewage

Flow

Remote CSO Application

WWETCO FlexFilter During Dry Weather

Underground Covered

Structure Left Empty

During Dry Weather

No residuals; no odors

Disinfection

Blower

Backwash

Return

WWETCO FlexFilter™

CSO

Backwash

Combined

Sewer Flow

Intermittent Low

Head Blower

Remote CSO Application

WWETCO FlexFilter During Wet Weather

• Auto Operation on Level Control

• Filter Screenings and Filtered Solids

Returned in Pumped Backwash

• No On-site Residual Removal

• No odor issues

Disinfection

WWETCO FlexFilter™

Periodic Base Flow

Sanitary Sewer Dry Weather Flow

No Effluent

Remote SSO Application WWETCO Bio-FlexFilter During Dry Weather

Periodic Aerated

Base Flow

Intermittent Low Head Blower

• Auto Operation on Timer • Flow Created by Air Lift • No On-site Residual Removal • No odor issues

WWETCO FlexFilter™

SSO

Sanitary Sewer Wet Weather Flow

Remote SSO Application WWETCO Bio-FlexFilter During Wet Weather

Pumped Backwash

Intermittent Low Head Blower

• Auto Operation on Level • Screenings and Filtered Solids

Returned in Pumped Backwash • No On-site Residual Removal • No odor issues

Bio-Treated Discharge with Disinfection

Disinfection

WWETCO FlexFilter™

Summary

• Flexible multi-use treatment plant processes are

the future to meet regulatory issues associated

with wet weather and nutrient controls.

• Future treatment technologies will focus on

energy savings and alternative ways to increase

capacity with less capital and lower O&M.

• The WWETCO FlexFilter™ and Bio-FlexFilter™

offers these flexibilities and capabilities today.

Compressed

Media Filter

Compressed

Filter Media

Strip Filter

Tertiary Filter

Simple Hydraulic Control and Treatment Solutions to Wet Weather & Wastewater Pollution Problems:

• CSOs, SSOs and Stormwater, • Biological Treatment • Tertiary Filtration & Nutrient Control

WWETCO FlexFlow™

WWETCO FlexFilter™ and Bio-FlexFilter™

WWETCO Filter Pod

WWETCO

Hydraulic Control

Valve

Pretreatment

Treated Effluent

Drainage Network Stormwater Controls

Remote

Treatment

Pod Filter