An activated-sludge plant uses coarse-bubble aeration at a depth of 15 ft. The flow is 6...

An activated-sludge plant uses coarse-bubble aeration at a depth of 15 ft. The flow is 6.5 mgd with an influent BOD of 220 mg/l (primary clarifier removal is 35 percent). Alpha, beta, and DO are like those in Example 11-8. Wastewater temperature is 16°C. Calculate the hp and airflow required.