Microbes in Human WelfareHard
Question
Select the correct statement from the following
Options
A.Biogas is product by the activity of aerobic bacteria on animal waste
B.Methanobacterium ia an aerobic bacterium found in rumen of cattle
C.Biogas, commonly called gobar ga, is pure methane
D.Activated sludge-sediment in settlement tanks of sewage treatement plant is a right source of aerobic bacteria.
Solution
Activated sludge is a process dealing with the tratement of sewage and industrail waste waters. Atmospheric air or pure oxygen is inteoduced to mixture of primary trated or screened sewage combined with organisms to develope a biological flock, which reduced the organic content of the sewage. Sediment in settlement tanks of sewage treatement plant is a rich source of aerobic bacteria because small amount are used as inculum in secondry treatement or biological treatement stage of sewage tratement.
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