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Assessment of BNR Systems in Florida

by Richard O. Mines, Jr., (Aff.M.ASCE), Univ of South Florida, Tampa, United States,
C. William Woods, Univ of South Florida, Tampa, United States,



Document Type: Proceeding Paper

Part of: Critical Issues in Water and Wastewater Treatment

Abstract:

Operating data from eight, full-scale, single-sludge, biological nutrient removal (BNR) wastewater treatment facilities in Florida were collected and evaluated. Three types of BNR facilities were evaluated: A²/O Process, 5-stage Bardenpho^TM Process, and oxidation ditches preceded with anaerobic/anoxic selectors. One year of operating data were examined for each facility. All facilities met stringent effluent requirements of 5, 5, and 3 mg/L for biochemical oxygen demand (BOD₅), total suspended solids (TSS), and total nitrogen (TN). Facilities which had an effluent total phosphorus (TP) limit of 1 mg/L also consistently met the required level of removal. Oxidation ditches preceded with anaerobic/anoxic selectors were found to be as reliable and effective as the conventional BNR systems.

Subject Headings: Water treatment plants | Chemical treatment | Anaerobic processes | Nutrient pollution | Biological processes | Oxidation | Wastewater treatment plants | Florida | United States

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