Northern Michigan Wastewater Operators Seminar Onaway Wetlands Treatment

Transcription

1 Northern Michigan Wastewater Operators Seminar 2008 Onaway Wetlands Treatment

2 City of Onaway WWTP John Palmer, City of Onaway WWTP Operator Randy Scott, Project Manager, Wilcox Professional Services, LLC

3 Location

4 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

5 Original Project DesignTeam Wilcox Professional Services, LLC McNamee Porter & Seeley Tetra Tech Dr. Robert Kadlec

6 Early Activities 1998 Referendum (February 24 th ) Application for NPDES Permit (March 12 th ) Environmental Review (April 28 th ) Wetlands Evaluation (July 18 th )

7 1998 Preliminary Engineering Report 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

8 Preliminary Engineering Report Treatment 1998 Sequencing Batch Reactor (SBR) Aerated Lagoon Spray Irrigation Aerated Lagoon Wetlands Discharge

9 Preliminary Engineering Report Treatment - Discharge Locations 1998

10 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 & odors MDEQ favored wetlands Neighbors concerns

11 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

12 Phase I: Treatment 1998

13 Phase I: Treatment 1998

14 Phase I: Treatment 1998

15 Preliminary Engineering Report Discharge Location 1998 Concerns about report outcome Investigate some other discharge possibilities

16 Wetlands Permits 1999 Public Hearings (January) Granted (June) Special monitoring NPDES Comments on draft permit (July 12 th ) Public Hearings (Fall)

17 Permit Challenge 1999 Concern about potential flooding Beaver Dam destruction Potential of contamination

18 Permits 2000 NPDES Permission to discharge (February) Ambient monitoring plan (October)

19 Permits Challenge 2001 Administrative Hearing (March 8 th ) A/G defends Results Favorable for City Sued in Ingham County Court City hires Steve Winters

20 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

21 Permits 2003 MDEQ Construction Permit acquired (January 9 th ) CMI Construction permitted (February)

22 Phase I: Treatment 2003

23 Phase I: Lagoons 2003

24 Phase I: Lagoons 2003

25 Phase I: Lagoons 2003

26 Phase I: Lagoons 2003

27 Phase I: Lagoons 2003

28 Phase I: Filtration Beds 2003

29 Phase I: Filtration Beds 2003

30 Phase I: Filtration Beds 2003

31 Phase I: Treatment Building 2003

32 Phase I: Wetlands 2003

33 Phase I: Lagoons 2004

34 Phase I: Lagoons 2004

35 Phase I: Filtration Beds 2004

36 Phase I: Treatment Building 2004

37 Phase I: Treatment Building 2004

38 Phase I: Wetlands 2004

39 Phase I: Wetlands 2004

40 Phase I: Treatment Building 2004

41 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

42 Has anyone seen this animal

43 Inside our Building

44 Chemical Feed Ferric Chloride for total phosphorus removal NPDES permit limits 1.0 mg/l monthly To Influent Wetwell then to Cell # 1 Day Tank 21 inch diameter 30 inches high Π r 2 x L= (3.14) (.875) 2 x 2.5= FT 3 x 7.48= 46 gallons 46 gallons/30 inches= 1.5 gal/in City 2of Onaway Wastewater Treatment Plant Chemical Treatment System Ferric Chloride ( FeCl3) Storage Tank 77 inches in height 64 inches diameter Π r 2 x L= (3.14) (.2.6) 2 x 6.4= 138 FT 3 x 7.48= 1038 gallons 1038 gallons/77 inches= 13.5 gallons/ inch Storage Tank Day Tank

45 Other NPDES Permit Limitations Design flow = 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

46 Wetland Discharge

47 Wetlands 1, 2, 3

48 Lagoons with Aerators (6 total)

49 Operator Add On Evaporation Bed - Dumping Station for lift station cleaning using City s Vac Truck Barley Grass to control algae blooms

50 Plant Performance BOD5 Removal 2008 INF BOD5 EFF BOD5 Actual Percent Removal Based on Concentrat ion Jan Feb March April May June Suspende d Solids Removal 2008 INF SS EFF SS Actual Percent Removal Based on Concentrat ion Jan Feb March April May June

51 Cold Weather Operation in Onaway Lagoon #1 surface frozen over. Reduced sunlight reduces the biological phosphorus removal process, ferric chloride use is necessary.

52 Winter Operation with Filter Beds

53 Infiltration Beds

54 Duck, Duck, Goose

55 Any Questions? Thank You