Question:

Do you think microbes can also be used as source of energy? If yes,how?

Updated On: Oct 4, 2023
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Solution and Explanation

Yes microbes can be used as a source of energy. Bacteria such as methane bacterium is used for the generation of gobar gas or biogas.
The generation of biogas is an anaerobic process in a biogas plant which consist of a concrete tank (10-15 feet deep) with sufficient outlets and inlets. The dung is mixed with water to form the slurry and thrown into the tank. The digester of the tank is filled with numerous anaerobic metane-producing bacteria which produce biogas from the slurry. Biogas can be removed from the pipe which is then used as a source of energy while the spent slurry is removed from the outlet and is used as a fertilizer.

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Questions Asked in CBSE CLASS XII exam

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Concepts Used:

Microbes in Human Welfare

There are several valuable microorganisms that are beneficial to humans in various manners such as:

In Household Products

  1. Fermentation of milk to produce yogurt.
  2. Milk cuddling to compose curd, cheese, and paneer.

In Industrial Products

  1. Production of beverages such as wine, beer, whiskey, brandy, or rum.
  2. Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.

Fermented Beverages

  1. A fermentor is used to produce microbes on a large scale for industrial purposes.
  2. The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.

Antibiotics

  1. The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.