During anaerobic digestion of organic waste, such as in producing bio-gas, which one of the following is left undegraded ?
During anaerobic digestion of organic waste, such as in producing bio-gas, which one of the following is left undegraded ?
(a) Hemicellulose
(b) Cellulose
(c) Lipids
(d) Lignin
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Correct Option (d) Lignin
Explanation:
During bio-gas formation, digestion of cellulose is slow (rate-limiting) and most of the lignin ls not decomposed. After cellulose lignin is the most abundant plant polymer. It forms 20 to 30% of the wood of the tree. Lignin is a complex polymeric molecule, made up of phenyl propanoid units. Cellulose rs a large chained polymer of giucose molecules which are linked with each other by glycosidic bonds. Hemicellulose are branched polymers of glucose, xylose, galactose, mannose and arabinose.
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