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A complete mixed activated sludge process aeration tank treats 5 MLD sewage having the influent and...

A complete mixed activated sludge process aeration tank treats 5 MLD sewage having the influent and effluent soluble BOD concentrations of 220 and 20 mg/L respectively. The volume of the aeration tank is 5060 m3 and the mean cell residence time is 10 days. MLVSS in aeration tank is 3,400 mg/L, MLVSS/MLSS = 0.8 and sludge wastage rate is 1 m3/hour. Calculate the concentration of return sludge suspended solids ?

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