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The color of the secondary sludge produced from the high rate trickling filter is ___________

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in Environmental Engineering by (81.4k points)
The color of the secondary sludge produced from the high rate trickling filter is ___________

(a) Gray

(b) Black

(c) Brown

(d) Green

I got this question in an interview.

Enquiry is from High Rate Trickling Filter and Secondary Clarifier topic in portion Sewage Filtration and Activated Sludge Process of Environmental Engineering

1 Answer

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Best answer
Correct choice is (c) Brown

To elaborate: The color of the secondary sludge produced from the high rate trickling filter is brown and the secondary sludge obtained is partially oxidized.

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