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Methane is formed due to the reduction of __________

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Methane is formed due to the reduction of __________

(a) Nitrates

(b) Sulfates

(c) Carbon dioxide

(d) Organic acids

This question was posed to me in an internship interview.

I want to ask this question from Biological Characteristics of Waste Water topic in section Wastewater Characteristics of Environmental Engineering

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The correct answer is (d) Organic acids

Best explanation: Organic acids (oxidation by anaerobic bacteria) —–> CH4 + CO2 + Energy.

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