A municipal sewage has BOD5 of 200 mg/l. It is proposed to treat it and dispose off into a marine environment. For what minimum efficiency should the sewage treatment plant be designed ?

A municipal sewage has BOD5 of 200 mg/l. It is proposed to treat it an

1.	A municipal sewage has BOD5 of 200 mg/l. It is proposed to treat it and dispose off into a marine environment. For what minimum efficiency should the sewage treatment plant be designed ?
A.	85%
B.	60%
C.	50%
D.	33.67%
Answer» B. 60%