The MLSS concentration in an aeration tank is 2000 mg/l and the sludge – McqOptions

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1.	The MLSS concentration in an aeration tank is 2000 mg/l and the sludge volume after 30 minutes of settling in a 1000 ml graduated cylinder is 176 ml. The value of sludge density index (SDI) will be nearly
A.	3.34 g/ml
B.	2.22 g/ml
C.	1.14 g/ml
D.	0.26 g/ml
Answer» D. 0.26 g/ml

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