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POLISHING EFFLUENT FROM A PERCHLORATE-REDUCING ANAEROBIC BIOLOGICAL CONTACTOR
Citation:
DUGAN, N. R., D. J. WILLIAMS, M. Meyer, R. R. Schneider, T. F. SPETH, K. C. KELTY, AND D. H. Metz. POLISHING EFFLUENT FROM A PERCHLORATE-REDUCING ANAEROBIC BIOLOGICAL CONTACTOR. Journal AWWA. American Water Works Association, Denver, CO, 103(8):74-84, (2011).
Impact/Purpose:
To inform the public.
Description:
The U.S. Environmental Protection Agency undertook at 3 ½ year pilot-scale biological perchlorate treatment study that included two long (311 and 340 days) examinations of anaerobic effluent polishing. The polishing system consisted of hydrogen peroxide addition and aeration, followed by aerobic biological filtration and membrane ultrafiltration. The polishing studies evaluated reaeration, as well as the control of turbidity, acetate, sulfide, ammonia, trihalomethane formation potentials, haloacetic acid formation potentials, and nitrosamine formation potentials. The polishing system restored dissolved oxygen to saturation levels; removed acetate to below the detection limit in warm weather; removed sulfide to below the detection limit in all temperatures; removed ammonia during warm weather; achieved decreases in effluent turbidity in all temperatures, albeit most effectively through ultrafiltration; and removed disinfection by-product formation potentials in all temperatures.
