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What is the normal value of the detention period adopted in a flocculator for design purpose?

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+1 vote
in Environmental Engineering by (81.4k points)
What is the normal value of the detention period adopted in a flocculator for design purpose?

(a) 30min

(b) 60min

(c) 90min

(d) 100min

This question was addressed to me during an online interview.

Origin of the question is Flocculation and Clarification in chapter Sedimentation of Environmental Engineering

1 Answer

+2 votes
by (693k points)
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Best answer
Right choice is (a) 30min

The best I can explain: The detention period in a flocculator for design purpose should be in the range of 10-40min and its normal value should be 30min.

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