The 500-bed Lotta Hart Hospital has a small activated sludge plant to treat its wastewat...

The 500-bed Lotta Hart Hospital has a small activated sludge plant to treat its wastewater. The average daily hospital discharge is 1,500 L per day per bed, and the average soluble BOD₅ after primary settling is 500 mg/L. The aeration tank has effective liquid dimensions of 10.0 m wide by 10.0 m long by 4.5 m deep. The plant operating parameters are as follows:

Determine the following: aeration period, F/M ratio, SVI.