The Wilderness Wastewater Treatment Plant (WWTP) located in Orange County, Virginia is a four concentric ring oxidation ditch activated sludge system with a rated capacity of 1,935 m3/day. The three outer rings are used for wastewater treatment and the inner ring is used as an aerobic digester. The flow capacity has been increased from 1,935 to 3,760 m3/d, however, the desired design capacity has since been increased to 3,870 m3/d, and there are plans to eventually expand to approximately 4,840 m3/d with improved nitrogen removal. The design goal for the planned upgrade is to discharge an effluent that contains less than 10 mg/l total nitrogen (TN) at all times, with an annual average of 8 mg/l or less. In this study, the pre-upgrade performance of the Wilderness Wastewater Treatment Plant was evaluated and several modifications were recommended for the incorporation of biological nutrient removal (BNR).
Alternatives for upgrading the Wilderness Wastewater Treatment Plant for biological nutrient removal
E.U. Cokgor, C.W. Randall; Alternatives for upgrading the Wilderness Wastewater Treatment Plant for biological nutrient removal. Water Sci Technol 1 December 2004; 48 (11-12): 453–462. doi: https://doi.org/10.2166/wst.2004.0894
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