During anaerobic digestion of organic waste, such as in producing biogas, which of the following is left undegraded?
Correct answer: A. Lignin
- A. Lignin
- B. Lipids
- C. Cellulose
- D. Hemi-cellulose
Explanation
Lignin is a complex, resistant polymer that anaerobic microbes degrade poorly, so it commonly remains as undegraded residue during biogas production. Cellulose and hemicellulose are more readily converted into simpler compounds.
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