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Board of Directors Meeting July 25, 2017
Richard Gullick, Director of Operations Timothy Castillo, Wastewater Manager
Odor Control Update Crozet Interceptor System and Moores Creek - - PowerPoint PPT Presentation
Odor Control Update Crozet Interceptor System and Moores Creek - - PowerPoint PPT Presentation
Odor Control Update Crozet Interceptor System and Moores Creek AWRRF Board of Directors Meeting July 25, 2017 Richard Gullick, Director of Operations Timothy Castillo, Wastewater Manager Overview Crozet Interceptor change in
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Crozet Interceptor Odor Control
Pump Station #1 Pump Station #2
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Comparison of Hydrogen Sulfide at Crozet Interceptor Pump Stations
June '16 June '17 June '16 June '17
Location Average H2S (ppm) VENDOR A Average H2S (ppm) VENDOR B % reduction Maximum H2S (ppm) VENDOR A Maximum H2S (ppm) VENDOR B % reduction
Pump Station #3 4 0.1 98% 149 11 93% Pump Station #2 1 0.1 90% 50 8 84% Pump Station #1 2 0.1 95% 93 10 89% Manhole #31 2 0.4 80% 153 63 59%
Results Summary
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H2S at Crozet Interceptor Pump Station #3
V E N D O R B V E N D O R A
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MCAWRRF Short-term Odor Control
Ferric Chloride Tanks and Feed Pump Chemical Feed Point at Headworks
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Results Summary
Hydrogen Sulfide Concentrations at MCAWRRF Primary Clarifier Launders
H2S (ppm) June/July 2014 (without FeCl3) June/July 2017 (with FeCl3) % reduction Avg. 21 2 90% Median 20 1 95% Max 85 29 66% Min 13 100%
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H2S at MCAWRRF Primary Clarifiers
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Effect
Number of citizen odor complaints:
March 2016 thru June 2016 March 2017 thru June 2017 % reduction Crozet Interceptor 13 100% Moores Creek AWRRF 12 100%
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Long-Term Odor Control
Equalization Basin Bypass Piping Foul Air Bio-Scrubber