engineering recuitment KPSC Assistant Engineer Civil Mock Test 2020 Environmental Engineering Water Treatment
An average operating data for conventional activated sludge treatment plant is as follows:
Waste water flow = 35000 m3/day, Volume of aeration tank = 10900 m3, Influent BOD = 250 mg/l, Effluent BOD = 20 mg/l, Mixed liquor suspended solids = 2500 mg/l, Effluent suspended solid= 30 mg/l, Waste sludge suspended solids = 9700 mg/l, and Quantity of waste sludge = 220 m3/day.
Calculate the food to microorganism ratio (F/M) (kg BOD per day/kg MLSS)
1
0.26
2
0.29
3
0.32
4
0.36