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Which gas evolves the most in the sludge digestion process?

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+1 vote
in Environmental Engineering by (81.4k points)
Which gas evolves the most in the sludge digestion process?

(a) SO2

(b) CO2

(c) N2

(d) CH4

I have been asked this question during an online exam.

This is a very interesting question from Digestion of Sludge, Sludge Digestion Tank topic in chapter Sewage Filtration and Activated Sludge Process of Environmental Engineering

1 Answer

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Best answer
Right choice is (d) CH4

To elaborate: Methane gas evolves the most during the sludge digestion process by approximately 70% of the total gas evolved.

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