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For minimum of how many days within starting of fermentation, initiates anaerobic bacterial action?

(a) 2

(b) 10

(c) 14

(d) 20

The question was posed to me by my college professor while I was bunking the class.

Question is taken from Problem involved in Biogas Production topic in portion Biomass Energy of Energy Engineering

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Best answer
The correct option is (b) 10

The explanation: The storage of raw materials in a damp, confined space for over ten days initiates anaerobic bacterial action that, though causing some gas loss, reduces the time for the digester to become operational.

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