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  4. In anaerobic sludge digestion during secondary treatment of sewage, biogas is produced, which is a mixture of

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Q. In anaerobic sludge digestion during secondary treatment of sewage, biogas is produced, which is a mixture of

AMUAMU 2013Microbes in Human Welfare

Solution:

Archaebacteria and methanogens are evolved in production of biogas or gobar gas. Some other bacteria involved in degradation process are Bacillus clostridium, Bacterium, etc. Biogas is produced during second treatment of sewage by anaerobic degradation of sludge by microbe, which is a mixture of $CH _{4}(50-70 \%), CO _{2} (25-35\%) H _{2} (1-5\%) N _{2} (2-7\%)$ and $O _{2} (0.0-1\%)$ and rarely $H _{2} S$.