The settling tank which is followed after the Trickling filter has whi – McqOptions

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1.	The settling tank which is followed after the Trickling filter has which of the following characteristic?
A.	tRecirculation is present
B.	tLow suspended solids
C.	tThe sludge from here is returned to the primary clarifier directly.
D.	tHas high BOD
Answer» C. tThe sludge from here is returned to the primary clarifier directly.

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