In trickling filter, B.O.D. is reduced to Options: A . &nbsp30 to 40% B . &nbsp40 to 60% C . &nbsp60 to 80% D . &nbsp80 to 90%

In trickling filter, B.O.D. is reduced to

Question

In trickling filter, B.O.D. is reduced to

Options:

A . 30 to 40%

B . 40 to 60%

C . 60 to 80%

D . 80 to 90%

Answer: Option C

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