“FIX THIS SMELL NOW!” – QUICK RESPONSE ODOR CONTROL OPTIONS
Charlotte-Mecklenburg Utilities (Utilities) has received increasingly frequent complaints about odors at the Six-Mile Creek Pump Station force main discharge, downstream throughout the gravity system to McAlpine Creek Water Reclamation Facility (WRF), and at the WRF. Utilities is committed to adding odor control at these facilities. The primary objective of the caustic slugging operation was to provide an immediate short-term solution to reduce odors and eliminate complaints in the Ballantyne neighborhood through which the wastewater discharged from the pump station force main flows by gravity. A secondary objective was to provide data that would assist in developing a long-term solution for odor control in that area of the collection system. The objective was to be achieved by passing a slug of caustic (sodium hydroxide) down the force main to kill the bacteria that produce odorous sulfides. Modifications to pumping cycles were also planned as part of the operation. The caustic slugging only provided reduced hydrogen sulfide (H2S) levels for 4 days before the levels returned to pre-treatment levels. Modifying the pump cycle to a longer run time appeared to provide longer results.
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Document Type: Research Article
Publication date: 01 January 2002
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