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
Top Related