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Solid remnants of the original input material to the digesters are called ________

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Solid remnants of the original input material to the digesters are called ________

(a) Ordure

(b) Egests

(c) Digestate

(d) Manure

This question was addressed to me in an online interview.

This key question is from Anaerobic Fermentation topic in section Biomass Energy of Energy Engineering

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Correct option is (c) Digestate

The best explanation: Digestate is the solid remnants of the original input material to the digesters that the microbes cannot use. It also consists of the mineralized remains of the dead bacteria from within the digesters. Digestate can come in three forms: fibrous, liquor, or a sludge-based combination of the two fractions.

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