Question

Select the correct statement from the following:

• A. Methanobacterium is an aerobic bacterium found in the rumen of cattle.
• B. Biogas is produced by the activity of aerobic bacteria.
• C. Biogas is pure methane.
• D. Activated sludge in sediment tanks is a rich source of aerobic bacteria.

Hint:

Aerobic bacteria play a vital role in wastewater management.

Answer 1

The Correct Option is D

Activated sludge, formed during wastewater treatment, contains aerobic bacteria that degrade organic matter in sewage.
These bacteria play a crucial role in reducing pollution and recycling nutrients.
Methanobacterium, an anaerobic bacterium, is involved in biogas production but is not aerobic.
Biogas is not pure methane; it contains a mixture of gases, including CO₂ and traces of other compounds.