Question

Anaerobic fermentation is how many staged process?

(a) Single stage

(b) Two – stage

(c) 3-stage

(d) 4 – stage

I have been asked this question in examination.

My question is taken from Anaerobic Fermentation in division Biomass Energy of Energy Engineering

Answer 1

Right choice is (b) Two – stage

To explain: Anaerobic decomposition is a two stage process as specific bacteria feed on certain organic materials. In the first stage, acidic bacteria dismantle the complex organic molecules into peptides, glycerol, alcohol and other sugars. Than the second type of bacteria starts to convert these simpler compounds into methane.