Question

Select the correct statement from the following
Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria

Biogas is produced by the activity of aerobic bacteria on animal waste

Methanobacterium is an aerobic bacterium found in rumen of cattle

Biogas, commonly called gobar gas, is pure methane

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Answer 1

Answer:

Biogas is produced by the activity of aerobic bacteria on animal waste

Explanation:

And it is also called gobar gas and it is pure methane.

Answer 2

Methanobacterium  are anaerobic organisms.

Biogas refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen.

Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Biogas can be produced by anaerobic digestion with anaerobic bacteria.

Thus, the correct answer is option (C), 'Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria'.