Applications of Microbes in Human Welfare — NEET Biology
📚 Practice ConceptFor more than a hundred years, microbes are being used to treat sewage (waste water) by the process of activated sludge formation and this helps in recycling of water in nature. Methanogens produce methane (biogas) while degrading plant waste. Biogas produced by microbes is used as a source of energy in rural areas. Microbes can also be used to kill harmful pests, a process called as biocontrol. The biocontrol measures help us to avoid heavy use of toxic pesticides for controlling pests. There is a need these days to push for use of biofertilisers in place of chemical fertilisers. It is clear from the diverse uses human beings have put microbes to that they play an important role in the welfare of human society.
Which of the above statements are correct? S1: Methanogens are a group of aerobic bacteria responsible for the production of biogas in anaerobic sludge digesters. S2: The primary components of biogas include methane, carbon dioxide, and hydrogen sulphide. S3: Methanobacterium is a common methanogen found exclusively in the rumen of cattle, contributing to cellulose digestion. S4: Biogas generation in a plant is indicated by the rising of a floating cover over the slurry due to gas accumulation. S5: The spent slurry from a biogas plant is generally discarded as a hazardous waste due to the presence of harmful anaerobic bacteria.
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