An extended aeration plant consists of three oxidation ditches without primary clarifica...

An extended aeration plant consists of three oxidation ditches without primary clarification. Each ditch has a volume of 2.0 mil gal. The average annual flow is 6.0 mgd, the maximum flow is 7.8 mgd, and the BOD is 240 mg/1. The MLSS is maintained at 1800 mg/l. Calculate the liquid detention time, BOD loading, and FIM ratio. Refer to Figure 11-26 and determine if sludge will settle properly.