a unique approach to southgate-wyandotte cso facility ... sullivan - cso...2016/01/29 · 1998...
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A Unique Approach
to Southgate-Wyandotte
CSO Facility Renovations
Timothy Sullivan, Senior Associate
Hubbell, Roth & Clark, Inc.
2016 WWADCON, FRANKENMUTH
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the Southgate-Wyandotte District and Facilities
RTF Facilities and Operations
Statement of the Problem
Alternatives
Solution
Green Project Reserves
Unique Features
Lessons Learned
Presentation Summary
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2016 WW Admin Conference
SE Michigan, Wayne County, City of Wyandotte, Ecorse Township, now Southgate
Adjacent to the Downriver WWTF (DWTF)
Serves all of Wyandotte, Half of Southgate
Mostly Combined Sewers, some storm sewered areas
History of the District
and Facilities
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History of the District
and Facilities
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All Local sewers constructed flowing east towards Canada
1929 Sewer system and Pump Station No. 5
Interceptor System (11 ft. and 9 ft. Dia.)
PS No. 5 - 900 MGD Capacity
Course screen, no disinfection
Inner Ring - Dry Weather pumps
Outer Ring - Wet Weather Pumps
13 ft. x 15 ft. box to Detroit River
History of the District
and Facilities
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History of the District
and Facilities
Page 6 | 1/29/2016
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History of the District
and Facilities
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History of the District
and Facilities
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1938 DWTF Constructed next door
30 MGD, Primary Treatment and Disinfection
PS No. 5 dry weather flow to DWTF (20 MGD)
Wet weather flow to same place
Further DWTF Expansions (30 MGD to 100 MGD to 150 MGD to 225 MGD)
But no increase in 20 MGD purchase capacity
History of the District
and Facilities
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1970’s S-W Relief System
Relief Sewer System (3 main branches, Major overflow connections, 13 ft dia. to PSPS)
1,700 MGD Pine Street Pump Station (staffed)
15 MG Retention Treatment Facility (RTF)
Flow Control Chamber and Gate (< 20 MGD to DWTF)
10 yr., 1 hr. storm (1.82 inches/one hr.) (Pre TP-40)
History of the District
and Facilities
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History of the District
and Facilities
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• Show 1970 stuff
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Hydraulic Capacity
Flow Control Chamber - 20 MGD to DWTF (full treatment)
Btw 20 and up to 550 MGD to CSO Basin (screenings, scum and disinfection)
Btw 550 MGD and 900 MGD directly to Detroit River (screenings and disinfection)
Up to 1700 MGD to Detroit River
at Pine Street PS
2,600 MGD Total
RTF Facilities and Operations Hydraulic Capacity
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Sodium Hypochlorite Disinfection
Twin underground concrete 5,000 gal tanks
Excellent shelf-life
No dilution required
Inspected in 2006
after 30 years of use
RTF Facilities and Operations RTF Disinfection
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Sodium Hypochlorite Disinfection
Chemical feed pumps:
Pumps to constant
head tank
One chem. feed pipe
for each storm pump
Overflow returned
to storage tank(s)
RTF Facilities and Operations RTF Disinfection
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No chemical pre-mixing, tanks mixed during operation
Supercharge First Flush (Fecal limit, no Chlorine limit)
Then one storm pump –
one chemical feed pipe
ALL flow supercharged
then disinfected
Often Full Capture of events
(no-overflow)
Manual implementation of basin flushing (drum controller to pneumatic flushing valves)
RTF Facilities and Operations RTF Operation (Pre-2000)
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15 MG Basin
Twin 7.5 MG basins
7 Bays each tank
Both operated together (in Parallel)
Inlet Isolation gates
RTF Facilities and Operations RTF Basins
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RTF Facilities and Operations RTF Basins
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• Add plan of basins
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Flushing System
Strainers, Booster Pumps
Flushing header
RTF Facilities and Operations RTF Basins
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Orifice type nozzles
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History of the District
and Facilities
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RTF Facilities and Operations RTF Basins
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1998 NPDES Permit - Optimization Study
Interim (1999) and Final (2003) CSO Control Program
Operations Plan
Sequenced vs. Parallel Operation (rejected)
Surface Overflow Rate Limitations (accepted, not implemented)
Automation Study
Cost Effective to Automate
7-10 Yr. Payback, depending on “savings”
RTF Facilities and Operations Prior Studies
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Aging Facilities
Manual Operation (Staffing issues)
Inefficient Chemical Feed
Ineffective Flushing System performance
No Money
Statement of the Problem
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Complete Facility Renovations
Full Automation
Process Optimization
Flushing System Improvements
Look for Money
Improvements Required
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Revisit Sequenced Operation Fill one tank, then disinfect / settle with second tank
Required new flap gates, new actuators on isolation gates
Significantly lowers chemical use, but
Limits hydraulic throughput and contract time
Alternatives Process Optimization
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Four Categories Green Infrastructure, Water Efficiency, Energy Efficiency and
Environmentally Innovative
Environmentally Innovative Category Projects that significantly reduce chemical use
Sodium Hypochlorite is a chemical
Hmmmm…..
Bang-up Business case was prepared,
and upon further review…
Green Project Reserves
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Awarded $1,100,000 Principal Forgiveness!!!
And the Wild Rumpus Began……
Green Project Reserves
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Awarded $1,100,000 Principal Forgiveness!!!
And the Wild Rumpus Began……
Green Project Reserves
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Green Project Reserves
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Green Project Reserves
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Sequenced and Parallel Operations
Chemical Mixing System
Flushing System Corrections / Enhancements
Automation and Chemical
Management
Unique Features
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Sequenced and Parallel Operations
Show plan with flap gates
Unique Features
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Unique Features
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Unique Features
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Flash Mixing equipment
Wet Well Installation
Access (Class 1, Division 1 Atmosphere)
Equipment Protection
First (and only) Dry
Well installation in MI
Unique Features Chemical Mixing and Operation
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Wet Well Configuration and Operation
Annular ring and flow
Short-circuiting of Flow - Chemical
Mixers need to pair with Pumps
Unique Features Chemical Mixing and Operation
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Wet Well Configuration and Operation
Preferential Mix and All Mix
Unique Features Chemical Mixing and Operation
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Pre-storm Automatic tank mixing
Single or Dual tank supply
Automatic Tank Transfer
Manual Tank Transfer
Feed Control Include Percent
Chlorine for each tank
Automatic System Flushing
Unique Features Chemical Management
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Effluent Water Source
Two SP Kinney Strainers
Three Booster Pumps
Unique Features Existing Basin Flushing System
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Header System with nozzles directing downward
Adequate water supply but ineffective nozzle energy
Unique Features Existing Basin Flushing System
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Minimize Cost
Rebuild Ex Strainers, Pumps
Maintain Header System
Maintain but Re-direct Nozzle energy
Eliminate Dead Zones
Add Nozzles “Effectively”
Unique Features Flushing System Goals
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Redirect Energy with:
Curved Contour concrete?
Quartered Pipe?
Rotate Pipe and Nozzles?
Pre-cast concrete “curbs”
Unique Features Existing Nozzle Options
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Shoot Along Floor?
Spray Out onto Floor?
Trial Process During Construction
Unique Features New Nozzle Options
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Unique Features New Nozzle Options
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One Tank at a time
Two-pass System
First pass: first to last Bay
Second Pass: Last to first bay
Adjustable time
Manual bay control
Unique Features Flushing Sequence
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Slide Gate Improvements
Stem Not True
Stem Threading – Acme vs Modified Acme threading
Stem Wear
Lessons Learned
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Nozzle Trial and Error
Curb Trial and Error
Lessons Learned
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THANK YOU
Questions
Timothy Sullivan, Senior Associate Hubbell, Roth & Clark, Inc.
535 Griswold, Suite 1680 Detroit, Michigan 48226
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
Page 49 | 1/29/2016
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
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2016 WW Admin Conference 2016 WWAdmin Conference
History of the District
and Facilities
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