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Question

During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded?

A
Lipids
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B
Lignin
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C
Hemi-cellulose
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D
Cellulose
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Solution

The correct option is D Lignin
  • Lignin is the most important factor affecting the hydrolysis of the cellulose component in lignocellulosic material.
  • The initial degradation step is difficult because the lignin-carbohydrate complexes create a barrier for microbial conversion due to the crystalline structure.

Thus, lignin is left untreated during the anaerobic digestion of organic wastes.

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