The BOD after the filtration of sewage from the low rate trickling filter is

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Mr. Dubey

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📊 Environmental Engineering

Q. The BOD after the filtration of sewage from the low rate trickling filter is

(A) 40-50%
(B) 80-90%
(C) 70-80%
(D) 90-99%

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✅ Correct Answer: (B) 80-90%

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