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What is the height of the concrete tank used in biogas plant?

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in Biology – Class 12 by (271k points)
What is the height of the concrete tank used in biogas plant?

(a) 10-15 metres

(b) 15-20 metres

(c) 10-15 feet

(d) 15-20 feet

I got this question in examination.

This key question is from Microbes in Production of Biogas topic in division Microbes in Human Welfare of Biology – Class 12

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Right choice is (c) 10-15 feet

For explanation I would say: The biogas plant consists of a concrete tank which is 10-15 feet deep and in which bio-wastes are collected and a slurry of dung is fed.

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