. The 600-bed hospital has a small, activated sludge plant to treat its wastewater. The average...

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. The 600-bed hospital has a small, activated sludge plant to treat its wastewater. The average daily hospital discharge is 1300 L/d/bed, and the average soluble BOD, after primary settling tank is 600 mg/L. the aeration tank has effective dimensions of 10 m wide by 10 m long by 3.5 m deep. The plant operating parameters are as follows: MLVSS=3000 mg/L MLSS 1.2(MLVSS) Settled sludge volume after 30 min = 300 mL/L Determine the following: a) aeration period, b) F/M ratio, c) SVI and return sludge rate. (3 Marks) . The 600-bed hospital has a small, activated sludge plant to treat its wastewater. The average daily hospital discharge is 1300 L/d/bed, and the average soluble BOD, after primary settling tank is 600 mg/L. the aeration tank has effective dimensions of 10 m wide by 10 m long by 3.5 m deep. The plant operating parameters are as follows: MLVSS=3000 mg/L MLSS 1.2(MLVSS) Settled sludge volume after 30 min = 300 mL/L Determine the following: a) aeration period, b) F/M ratio, c) SVI and return sludge rate. (3 Marks)