Primary effluent is to be treated by two parallel trains of the complete mixed activated sludge...

Primary effluent is to be treated by two parallel trains of the complete mixed activated sludge process. Assume average flow conditions, and the primary sedimentation performance is described in question two above. Assume the following for the activated sludge process: i) plant effluent BOD of 8mg/L ii) biomass yield of 0.55kg biomass/kg BOD iii) endogenous decay rate (kd)= 0.04day-1 iv) Solids retention time= 8days v) MLVSS concentration in the aeration tank of 3000mg/L vi) waste and recycle solids concentration of 12,000mg/L a. Determine the aeration tank volume in cubic meters b. Determine the return cycle (recycle) flow rate in cubic meters per day (and in MGD) c. Determine the food to microorganism ratio (F/M) for the aeration tank in kg BOD per day per kg MLVSS d. Determine the design hydraulic detention time in hours

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Amanda K answered 1 year ago

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