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How are systems intended for the digestions are filled and emptied?

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How are systems intended for the digestions are filled and emptied?

(a) Manually

(b) By evaporation

(c) By pumps and pipes

(d) By channels and pits

I got this question in an international level competition.

Enquiry is from Anaerobic Fermentation in portion Biomass Energy of Energy Engineering

1 Answer

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Best answer
Right option is (c) By pumps and pipes

Easiest explanation: Systems intended for the digestion of liquid or suspended solid waste (cow manure is a typical example of this variety) are mostly filled or emptied using pumps and pipe work. A simple version is simply to gravity feed the tank allow the digested slurry to overflow the tank.

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