LOW-RATE ANAEROBIC TREATMENT OF BREWERY WASTEWATER AT COORS?r 17 SHENANDOAH FACILITY

摘要

Coors Brewing Company抯 Virginia facility is located along the environmentallyrnsensitive South Fork of the Shenandoah River near the Blue Ridge Mountains andrnShenandoah National Park.rnUntil 1995, the moderately high-strength wastewater (COD = 3850 mg/l) from thernfacility was treated directly in an activated sludge plant. The high-carbohydrate,rnnutrient-deficient brewery wastewater often produced a poor-settling, bulking sludgernin the activated sludge process. Furthermore, the system was often overloaded andrnrequired significant operator attention to ensure effluent limits could be met on arnconsistent basis. The system produced a significant amount of sludge which requiredrncontinuous dewatering. Aeration energy requirements were also high.rnIn the early nineties, Coors began searching for an appropriate treatment technology