Question

Biogas generation is a three stage anaerobic digestion of animal and other organic wastes. Study the following flow chart and select the correct option of stage I, II and III.

• A. In stage-I facultative anaerobic microorganisms bring about enzymatic breakdown of complex organic compounds into simple soluble compounds or monomers
• B. In stage-II, monomers are converted into organic acids by fermentation causing microbes
• C. In stage-III organic acids are acted upon by methanogenic bacteria to produce biogas
• D. All of these

Answer 1

The correct option is D All of these

Various stages of biogas generation are as follows-

In stage-I, anaerobic microorganisms bring about enzymatic breakdown of complex organic compounds into simple soluble compounds or monomers.

In stage-II, monomers are converted into organic acids by fermentation causing microbes.

In stage - III, organic acids are acted upon by methanogenic bacteria to produce biogas.

So, the correct answer is option 'd'.