Performance of wuxi WWTP in china

In Wuxi Wastewater Treatment Plant, the Anaerobic, anoxic and oxic (A²/O) process was employed to remove the nitrogen and phosphorus, which exhibited the positive results of the high removal efficiency for phosphorus with a range of 67.7% to 89.9% and an average value of 78.0. The effluent of phosphorus met the national discharge standard. The removal of TN was effected by both BOD variation of influent and wastewater temperature. TN removal was in the range of 28.5% to 55.8% with an average value of 39.4%. The energy cost was 0.15 kWh (m³d)⁻¹ or 1.35 kWh (kgBOD·d)⁻¹. The annual average sludge production was 46.3 m³d⁻¹, the annual average dosage for dewatering was 40 kg d⁻¹.