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Which of the following is an anaerobic process for treating sewage?

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in Environmental Engineering by (81.4k points)
Which of the following is an anaerobic process for treating sewage?

(a) Oxidation pond

(b) Imhoff tank

(c) Oxidation ditch

(d) Rotating Biological Contactors

I got this question by my college director while I was bunking the class.

This intriguing question originated from Oxidation and Stabilization Ponds in section Solid Waste Management, Aerobic & Anaerobic Stabilization Units of Environmental Engineering

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The correct answer is (b) Imhoff tank

Easiest explanation: Oxidation pond, Oxidation ditch and Rotating Biological Contactors are an aerobic process of treating sewage whereas Imhoff tank is an anaerobic process of treating sewage.

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