The BOD removal efficiency, in percentage, during primary treatmet under normal conditions is about

The BOD removal efficiency, in percentage, during primary treatmet und

1.	The BOD removal efficiency, in percentage, during primary treatmet under normal conditions is about
A.	0.65
B.	0.85
C.	0.3
D.	Zero
Answer» B. 0.85

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The BOD removal efficiency, in percentage, during primary treatmet under normal conditions is about

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