2016 WWADCON, FRANKENMUTH

Transcription

1 A Unique Approach to Southgate-Wyandotte CSO Facility Renovations Timothy Sullivan, Senior Associate Hubbell, Roth & Clark, Inc WWADCON, FRANKENMUTH

2 Presentation Click to edit Summary Master title style 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 Page 2 1/29/2016

3 History of the District Click to edit Master title style and Facilities 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 Page 3 1/29/ WW Admin Conference

4 History of the District Click to edit Master title style and Facilities Page 4 1/29/2016

5 History of the District Click to edit Master title style and Facilities 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 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 Page 5 1/29/2016

6 History of the District Click to edit Master title style and Facilities Page 6 1/29/2016

7 History of the District Click to edit Master title style and Facilities Page 7 1/29/2016

8 History of the District Click to edit Master title style and Facilities Page 8 1/29/2016

9 History of the District Click to edit Master title style and Facilities 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 Page 9 1/29/2016

10 1970 s S-W Relief System History of the District Click to edit Master title style and Facilities 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) Page 10 1/29/ WW Admin Conference

11 Show 1970 stuff History of the District Click to edit Master title style and Facilities Page 11 1/29/2016

12 Hydraulic Capacity RTF Click Facilities to edit Master and Operations title style 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 Hydraulic Capacity Page 12 1/29/2016

13 RTF Click Facilities to edit Master and Operations title style RTF Disinfection Sodium Hypochlorite Disinfection Twin underground concrete 5,000 gal tanks Excellent shelf-life No dilution required Inspected in 2006 after 30 years of use Page 13 1/29/2016

14 RTF Click Facilities to edit Master and Operations title style RTF Disinfection 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) Page 14 1/29/2016

15 RTF Click Facilities to edit Master and Operations title style 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) RTF Operation (Pre-2000) Manual implementation of basin flushing (drum controller to pneumatic flushing valves) Page 15 1/29/2016

16 15 MG Basin RTF Click Facilities to edit Master and Operations title style RTF Basins Twin 7.5 MG basins 7 Bays each tank Both operated together (in Parallel) Inlet Isolation gates Page 16 1/29/2016

17 RTF Click Facilities to edit Master and Operations title style RTF Basins Add plan of basins Page 17 1/29/2016

18 RTF Click Facilities to edit Master and Operations title style RTF Basins Flushing System Strainers, Booster Pumps Flushing header Orifice type nozzles Page 18 1/29/2016

19 History of the District Click to edit Master title style and Facilities Page 19 1/29/2016

20 RTF Click Facilities to edit Master and Operations title style RTF Basins Page 20 1/29/2016

21 RTF Click Facilities to edit Master and Operations title style Prior Studies 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 Page 21 1/29/2016

22 Statement Click to edit of Master the Problem title style Aging Facilities Manual Operation (Staffing issues) Inefficient Chemical Feed Ineffective Flushing System performance No Money Page 22 1/29/2016

23 Improvements Click to edit Master Required title style Complete Facility Renovations Full Automation Process Optimization Flushing System Improvements Look for Money Page 23 1/29/2016

24 Alternatives Click to edit Master title style Process Optimization 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 Page 24 1/29/2016

25 Green Click to Project edit Master Reserves title style 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 Page 25 1/29/2016

26 Green Click to Project edit Master Reserves title style Awarded $1,100,000 Principal Forgiveness!!! And the Wild Rumpus Began Page 26 1/29/2016

27 Green Click to Project edit Master Reserves title style Awarded $1,100,000 Principal Forgiveness!!! And the Wild Rumpus Began Page 27 1/29/2016

28 Green Click to Project edit Master Reserves title style Page 28 1/29/2016

29 Green Click to Project edit Master Reserves title style Page 29 1/29/2016

30 Unique Click to Features edit Master title style Sequenced and Parallel Operations Chemical Mixing System Flushing System Corrections / Enhancements Automation and Chemical Management Page 30 1/29/2016

31 Unique Click to Features edit Master title style Sequenced and Parallel Operations Show plan with flap gates Page 31 1/29/2016

32 Unique Click to Features edit Master title style Page 32 1/29/2016

33 Unique Click to Features edit Master title style Page 33 1/29/2016

34 Unique Click to Features edit Master title style Chemical Mixing and Operation Flash Mixing equipment Wet Well Installation Access (Class 1, Division 1 Atmosphere) Equipment Protection First (and only) Dry Well installation in MI Page 34 1/29/2016

35 Click to edit Master title style 2016 WW Admin Conference

36 Unique Click to Features edit Master title style Chemical Mixing and Operation Wet Well Configuration and Operation Annular ring and flow Short-circuiting of Flow - Chemical Mixers need to pair with Pumps Page 36 1/29/2016

37 Unique Click to Features edit Master title style Chemical Mixing and Operation Wet Well Configuration and Operation Preferential Mix and All Mix Page 37 1/29/2016

38 Unique Click to Features edit Master title style Chemical Management 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 Page 38 1/29/2016

39 Effluent Water Source Two SP Kinney Strainers Three Booster Pumps Unique Click to Features edit Master title style Existing Basin Flushing System Page 39 1/29/2016

40 Unique Click to Features edit Master title style Existing Basin Flushing System Header System with nozzles directing downward Adequate water supply but ineffective nozzle energy Page 40 1/29/2016

41 Unique Click to Features edit Master title style Flushing System Goals Minimize Cost Rebuild Ex Strainers, Pumps Maintain Header System Maintain but Re-direct Nozzle energy Eliminate Dead Zones Add Nozzles Effectively Page 41 1/29/2016

42 Redirect Energy with: Unique Click to Features edit Master title style Existing Nozzle Options Curved Contour concrete? Quartered Pipe? Rotate Pipe and Nozzles? Pre-cast concrete curbs Page 42 1/29/2016

43 Unique Click to Features edit Master title style New Nozzle Options Shoot Along Floor? Spray Out onto Floor? Trial Process During Construction Page 43 1/29/2016

44 Unique Click to Features edit Master title style New Nozzle Options Page 44 1/29/2016

45 Unique Click to Features edit Master title style Flushing Sequence 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 Page 45 1/29/2016

46 Lessons Click to Learned edit Master title style Slide Gate Improvements Stem Not True Stem Threading Acme vs Modified Acme threading Stem Wear Page 46 1/29/2016

47 Lessons Click to Learned edit Master title style Nozzle Trial and Error Curb Trial and Error Page 47 1/29/2016

48 THANK YOU Questions Timothy Sullivan, Senior Associate Hubbell, Roth & Clark, Inc. 535 Griswold, Suite 1680 Detroit, Michigan 48226

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