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Wastewater Department Staff Report 2015. Gravity Thickener and pumps  Replacement of both thickener pumps, valves, controls, grinder and electrical system.

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Presentation on theme: "Wastewater Department Staff Report 2015. Gravity Thickener and pumps  Replacement of both thickener pumps, valves, controls, grinder and electrical system."— Presentation transcript:

1 Wastewater Department Staff Report 2015

2 Gravity Thickener and pumps  Replacement of both thickener pumps, valves, controls, grinder and electrical system  Replacement of entire G.T. to include new coating, concrete repair, walkway, instrumentation, drive shafts, energy displacement baffles, flights, weirs and scum trough.

3 Primary Dewatering Processes  Belt Filter Press, 12-14% Solids  Screw Press, 30-32% Solids  Replacement of entire system to include new dewatering equipment, inlet valves, sludge pipeline, electrical system, polymer system, flow meter, conveyors, holding area, instrumentation and structure

4 Secondary Clarifiers  Replacement of entire system to include new drive shafts, inlet valves, energy displacement baffles, flights, chains, wear shoes, weirs and scum troughs  Increased reliability, stability and capacity of the biology system and compliance

5 Blowers  Existing natural gas blowers were replaced with high efficiency electric turbo blowers  Saving the city an average of $8,000 per month in utility fees

6 Aeration Basins  Replacement of entire system to include new stainless steel piping, diffusers, fiberglass walls, valves, and instrumentation  Increased reliability, stability and capacity of the biology system and compliance

7 Supervisory Control and Data Acquisition  Replacement of entire system to include new programmable logic controllers, human machine interface, fiber optic lines, servers, computers, instrumentation and program  Provides real-time monitoring and controls and the ability to track and trend the system

8 Real-Time Monitoring

9

10 Effluent Sampling Biochemical Oxygen Demand 20142015 January7.00 8.65 February6.31 7 March8.90 9.1 April7.20 8 May8.92 6.8 June3.30 5.8 July4.90 NA August16.30 NA September6.50 NA October5.10 NA November6.80 NA December2.80 NA Yearly Avg 7.007.56 Min 2.805.80 Max 16.309.10

11 Effluent Sampling Tjeldahl Nitrogen

12 Effluent Sampling Ammonia-Nitrogen

13 Effluent Sampling Nitrate-Nitrogen

14 Effluent Sampling Total Nitrogen

15 Utility consumption (electrical)

16 Pond Maintenance  Restoration of Pond 1, 2, 3, and 5 including  Restored 3:1 slope  Leveled top bank and bottom bed  Removal of brush  Pond 4 still needs to be rehabbed, found a large amount of material in the bottom due to lack of maintenance done in the past.  Increase in percolation efficiency and pond capacity

17 Dean’s Wash  Complete Restoration of Dean’s Wash including  2 Box culverts  Primary effluent lines  Primary sludge lines  Electrical duct banks  Compacted slopes  Fencing

18  Collection System Staff Report

19 Manhole Maintenance and Repair  Replacement of entire unit  Increase in reliability and accuracy of permit required samples

20 General Cleaning

21 Restaurant Cleaning & Inspections

22 Sewer Cleaning & Inspections


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