A complete mixed activated sludge process is operated with a clarifier and sludge recycle. The
influent soluble BOD concentration is 200 mg/L and the flow is 1000 m3/day. The effluent
soluble BOD is 20 mg/L and the effluent VSS concentration is 40 mg/L. What is the oxygen
consumption rate of the aeration tank in kg/day?
The sludge parameters are as follows:
μm = 3 d-1. Ks = 20 mg/L, kd = 0.1d-1, Y = 0.5 g VSS/g BOD