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Q.

In a biogas digestor having biomass and animal wastes as feed, for optimum methane production, the value of pH should be such that initiall

[A] pH is in the range 6.6 to 7

[B] pH < 6.2

[C] pH is in the range 7 to 7.2

[D] pH is in the range 7.6 to 8

Answer & Explanation
Answer: pH is in the range 6.6 to 7

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