Question

Which is the third stage of anaerobic digestion?

(a) Acetogenesis

(b) Methanogenesis

(c) Acidogenesis

(d) Hydrolysis

I have been asked this question by my college director while I was bunking the class.

Query is from Anaerobic Fermentation in chapter Biomass Energy of Energy Engineering

Answer 1

Correct choice is (a) Acetogenesis

The best I can explain: The third stage of anaerobic digestion is acetogenesis. Here, simple molecules created through the acidogenesis phase are further digested by acetogens to produce largely acetic acid, as well as carbon dioxide and hydrogen.