An activated sludge tank is 30 m in long 9 m wide and has liquid depth – McqOptions

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1.	An activated sludge tank is 30 m in long 9 m wide and has liquid depth of 4 m. The influent sewage flow rate is 3.5 MLD. The primary effluent has BOD of 130 mg/l and suspended load of 15 mg/I. The MLSS concentration in the aeration tank is 1800 mg/I. The Corresponding F/M ratio is
A.	0.19
B.	0.23
C.	0.32
D.	0.46
Answer» C. 0.32

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