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The maximum BOD removal efficiency of the Step aeration process of the activated sludge system is ___________

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in Environmental Engineering by (81.4k points)
The maximum BOD removal efficiency of the Step aeration process of the activated sludge system is ___________

(a) 92%

(b) 80%

(c) 99%

(d) 78%

I got this question in examination.

My question is taken from Design of Activated Sludge Plant topic in division Sewage Filtration and Activated Sludge Process of Environmental Engineering

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Best answer
Correct choice is (a) 92%

The best explanation: The BOD removal efficiency of the step aeration process of the activated sludge system is between 85% to 92%.

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