TWENTY WEEK EVALUATION OF THE MULTI-ANOXIC ZONES NITRIFICATION/DENITRIFICATION TREATMENT PROCESS FOR REMOVING LOW LEVEL TOTAL INORGANIC NITROGEN AT THE CITY OF REDLANDS, CALIFORNIA WASTEWATER TREATMENT FACILITY
Abstract:In January 2001, the City of Redlands Municipal Utilities Department Wastewater Division (WWD) began to evaluate the capability of the step feed, multi-anoxic zones nitrification/denitrification treatment process to accomplish low level total inorganic nitrogen (TIN) removal. Previous to January 2001 the WWD had used a single-sludge single-anoxic zone predenitrification/nitrification configuration to meet the City's State of California Waste Discharge Requirements permit interim 12-month average TIN limit of 15 mg/L. On May 31, 2001 the interim TIN limit of 15 mg/L would change to a permit compliance level of 10 mg/L and the plant, as configured, could not meet this new compliance level. This paper documents the operational changes made by the WWD to bring the plant into compliance with this new regulatory limit by May 31, 2001.
Document Type: Research Article
Publication date: January 1, 2002
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