Question

Select the correct statement from the following
A. Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
B. Biogas is produced by the activity of aerobic bacteria on animal waste
C. Methanobacterium is an aerobic bac- terium found in rumen of cattle
D. Biogas, commonly called gobar gas, is pure methane

Answer 1

Correct Answer - 1
Biogas is produced by activity of anaerobic bacteria. Methanbacterium is an anerobic bacterium .Biogas is a mixture of methane , `CO_2 & H_2`