Lowering pH of Hypochlorinated Trickling Filter Effluent Assure Coliform Discharge Compliance
pH elevation at an advanced secondary wastewater effluent occurred as a result of pH elevation of the water supply from 7 to 8 and conversion of chlorine to hypochlorite, with consequent pH to about 8.5, which resulted in an inability to meet an average and maximum total coliform NPDES discharge requirement of 23 and 200 MPN, respectively, where there had been no difficulty in meeting those limits before these changes. Lowering pH to 8.0 and addition of sulfuric acid corrected the difficulty and, subsequently, the effluent easily met discharge requirements.
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Document Type: Research Article
Publication date: 2000-01-01
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