MEASURING ACTIVATED SLUDGE SETTLING CHARACTERISTICS TO OPTIMIZE FINAL CLARIFIER DESIGN
Abstract:The Western Carolina Regional Sewer Authority (WCRSA) is improving its Mauldin Road Wastewater Treatment Plant (WWTP) to meet more stringent permit limitations at 70 million gallons per day (MGD). To determine if the existing final clarifiers had sufficient area to treat 70 MGD during a wet weather event, settling column tests were performed.
Results from the Mauldin Road WWTP were compared to results from similar studies performed at three City of Atlanta WWTPs to determine the reliability of the results for use in design.
Through the use of settling column tests and state point analysis, it was determined that the existing final clarifiers at the Mauldin Road WWTP should provide adequate area for settling the activated sludge up to 70 MGD. If the settling characteristics during peak loads are not as favorable as those during the tests, then a polymer can be fed to improve the solids' settleability. An effective polymer was identified during the testing.
Document Type: Research Article
Publication date: 2005-01-01
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