Question

Which of the following is the most important product of anaerobic digestion?

(a) Biogas

(b) Acetic acid

(c) Amino acid

(d) Calcium

The question was posed to me in final exam.

The query is from Fundamental Reactions of Pesticide Metabolism in section Microbial Transformations of Pesticides of Environmental Biotechnology

Answer 1

The correct answer is (a) Biogas

For explanation I would say: Biogas is the most important product of anaerobic digestion where organic matter is converted into simpler components by fermentation process. The entire process is divided into three steps that is hydrolysis, acidification and methane formation. This last step generates biogas which is one of the most important products. In the acidification process acetic acid is produces and Amino acid is also produced during the process but in much earlier step and is not the most important product of anaerobic digestion. Calcium is not produced in any of the steps.