NEETZoologyMicrobes in Human Welfare
Component of sewage treatment Function associated A. Primary treatment 1. Filtration and sedimentation B. Secondary treatment 2. Reduces BOD C. Aeration tanks 3. Methane production D. Anaerobic sludge digesters 4. Air is pumped in
Options
- AA-2; B-1; C-3; D-4
- BA-1; B-3; C-2; D-4
- CA-1; B-2; C-3; D-4
- DA-1; B-2; C-4; D-3
Correct answer
D. A-1; B-2; C-4; D-3
Step-by-step solution
Primary treatment involves filtration and sedimentation to remove large particles. Secondary treatment focuses on reducing BOD through microbial action. Aeration tanks are where air is pumped in to facilitate the growth of aerobic microbes. Anaerobic sludge digesters produce methane during the digestion of sludge.