Give examples to prove that microbes release gases during metabolism.
Large holes in ‘Swiss Cheese’ are due to the production of a large amount of C02 by a bacterium named Propionibacterium shamanic. The puffed-up appearance of dough is due to the production of C02 gas by yeast, Saccharomyces cerevisiae. Methane, H2S, and CO2 are produced during microbial digestion of organic compounds in the case of secondary treatment of sewage. The dung of the cattle produces methane gas in the biogas pLants.
