Among the following, which is/are not pre-treatment unit (s) ?

1.	Among the following, which is/are not pre-treatment unit (s) ?
A.	Bar screen and grit chamber
B.	Flow equalization and proportioning tank
C.	Neutralization for pH adjustment tank
D.	Nutrient removal tank
Answer» B. Flow equalization and proportioning tank

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Among the following, which is/are not pre-treatment unit (s) ?

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