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City of Onaway WWTP
John Palmer, City of Onaway WWTP Operator Randy Scott, Project Manager, Wilcox Professional Services, LLC
Northern Michigan Wastewater Operators Seminar 2008 Onaway - - PowerPoint PPT Presentation
Northern Michigan Wastewater Operators Seminar 2008 Onaway - - PowerPoint PPT Presentation
Northern Michigan Wastewater Operators Seminar 2008 Onaway Wetlands Treatment City of Onaway WWTP John Palmer, City of Onaway WWTP Operator Randy Scott, Project Manager, Wilcox Professional Services, LLC Location Demographics Area: 1.5
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Location
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Demographics
- Area: 1.5 Square Miles
- Population: 993
- Families in Poverty: 20.3%
- Household Median Income: $20,787
- Taxable Value: $12 million
- Low/Mod Population: 59.6%
- Annual Budget: $400,000
– $130,000 Water – $280,000 Wastewater
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Original Project DesignTeam
Wilcox Professional Services, LLC McNamee Porter & Seeley Tetra Tech
- Dr. Robert Kadlec
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Early Activities
1998
- Referendum (February 24th)
- Application for NPDES Permit (March 12th)
- Environmental Review (April 28th)
- Wetlands Evaluation (July 18th)
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Preliminary Engineering Report
1998
- Customer Base:
517 > 572
- EDU Count:
688 > 775
- Flow (g/d):
144,440 > 162,750
- Design Flows
200,000 g/d or 0.2 mgd
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Preliminary Engineering Report
Treatment
1998
- Sequencing Batch Reactor (SBR)
- Aerated Lagoon – Spray Irrigation
- Aerated Lagoon – Wetlands Discharge
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Preliminary Engineering Report
Treatment - Discharge Locations
1998
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Preliminary Engineering Report
Lagoon Spray Irrigation
1998
- City had the land
- Need 6 months
storage
- Easily clogged
- O & M difficult
- Ability of the land to
adsorb
- Carry over aerosols &
- dors
- MDEQ favored wetlands
- Neighbors concerns
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Preliminary Engineering Report
Treatment – Lagoon Wetlands
1998
- City had the land
- Long term capacity not required
- Wetlands polish the treatment
- Must monitor and maintain wetland
- Cost: $3,240,000; Annual: $137,886
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Phase I: Treatment
1998
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Phase I: Treatment
1998
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Phase I: Treatment
1998
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Preliminary Engineering Report
Discharge Location
1998
- Concerns about report outcome
- Investigate some other discharge
possibilities
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Permits
1999
- Wetlands
– Public Hearings (January) – Granted (June) – Special monitoring
- NPDES
– Comments on draft permit (July 12th) – Public Hearings (Fall)
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Permit Challenge
1999
- Concern about potential flooding
– Beaver Dam destruction
- Potential of contamination
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Permits
2000
- NPDES
– Permission to discharge (February) – Ambient monitoring plan (October)
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Permits Challenge
2001
- Administrative Hearing (March 8th)
– A/G defends
- Results Favorable for City
- Sued in Ingham County Court
– City hires Steve Winters
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Permits Challenge
2001
- Case heard before the court (August)
– There is no stream, not waters of the State – Court rules in City’s favor
- Plaintiffs prepare to sue in Presque Isle
County
– Issue settled
- City Expends $ 50,000
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Permits
2003
- MDEQ Construction Permit acquired
(January 9th)
- CMI Construction permitted (February)
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Phase I: Treatment
2003
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Phase I: Lagoons
2003
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Phase I: Lagoons
2003
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Phase I: Lagoons
2003
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Phase I: Lagoons
2003
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Phase I: Lagoons
2003
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Phase I: Filtration Beds
2003
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Phase I: Filtration Beds
2003
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Phase I: Filtration Beds
2003
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Phase I: Treatment Building 2003
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Phase I: Wetlands
2003
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Phase I: Lagoons
2004
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Phase I: Lagoons
2004
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Phase I: Filtration Beds
2004
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Phase I: Treatment Building 2004
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Phase I: Treatment Building 2004
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Phase I: Wetlands
2004
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Phase I: Wetlands
2004
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Phase I: Treatment Building 2004
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Summary
2004
- Total Project: $13,283,350
– USDA RD
- Grant: $ 7,192,000
- Loan $ 2,503,000
– EDA: $1,290,000 – CMI: $1,000,000 – MEDC: $582,350 – SFR/USDA RD Hardship: $566,000
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Has anyone seen this animal
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Inside our Building
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Chemical Feed
- Ferric Chloride for total
phosphorus removal
- NPDES permit limits
– 1.0 mg/L monthly
2 Day Tank Storage Tank To Influent Wetwell then to Cell # 1 Day Tank 21 inch diameter 30 inches high Π r2x L= (3.14) (.875)2 x 2.5= 6.010 FT3 x 7.48= 46 gallons 46 gallons/30 inches= 1.5 gal/in Storage Tank 77 inches in height 64 inches diameter Π r2x L= (3.14) (.2.6)2 x 6.4= 138 FT3 x 7.48= 1038 gallons 1038 gallons/77 inches= 13.5 gallons/ inch
City of Onaway Wastewater Treatment Plant Chemical Treatment System
Ferric Chloride ( FeCl3)
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Other NPDES Permit Limitations
- Design flow = 0.200 MGD
- CBOD5
– 85% removal – 25 mg/L-30 day average
- Suspended solids
– 85% – 30 mg/L -30 day average
- Fecal Coliform
– 200 # /100 ml -30 day average
- Dissolved Oxygen
– 4.0 ppm daily minimum
- Ph - Range between 6.5 s.u. to
9.0 s.u.
- Annual Wetlands and Ambient
Evaluation
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Wetland Discharge
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Wetlands 1, 2, 3
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Lagoons with Aerators (6 total)
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Operator Add On
- Evaporation Bed
- Dumping Station
for lift station cleaning using City’s Vac Truck
- Barley Grass to control
algae blooms
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Plant Performance
BOD5 Removal 2008 INF BOD5 EFF BOD5 Actual Percent Removal Based on Concentrat ion
Jan 288 2.5 99 Feb 221 2 99 March 212 2.6 98.7 April 168 4 97.6 May 165 18.3 89.8 June 278 2 99
Suspende d Solids Removal 2008 INF SS EFF SS Actual Percent Removal Based on Concentrat ion
Jan 240 2.9 98.7 Feb 223 5 97.7 March 205 4 98 April 206 7 96.6 May 180 2.8 98 June 303 9 97
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Cold Weather Operation in Onaway
- Lagoon #1 surface
frozen over.
- Reduced sunlight
reduces the biological phosphorus removal process, ferric chloride use is necessary.
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Winter Operation with Filter Beds
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Infiltration Beds
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Duck, Duck, Goose
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