Which gas evolves the most in the sludge digestion process? – McqOptions

MCQOPTIONS

1.	Which gas evolves the most in the sludge digestion process?
A.	SO<sub>2</sub>
B.	CO<sub>2</sub>
C.	N<sub>2</sub>
D.	CH<sub>4</sub>
Answer» E.

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