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NEETZoologyMicrobes in Human Welfare

Stage of sewage treatment Condition associated A. Pathogenic microbes 1. Secondary treatment B. Sewage effluent 2. Secondary treatment plant effluent C. Anaerobic conditions 3. Methanogens D. Aerobic conditions 4. Human diseases

Options

  1. AA-4; B-2; C-3; D-1
  2. BA-2; B-4; C-3; D-1
  3. CA-4; B-3; C-2; D-1
  4. DA-4; B-2; C-1; D-3

Correct answer

A. A-4; B-2; C-3; D-1

Step-by-step solution

Pathogenic microbes in sewage can cause human diseases if untreated. Sewage effluent released after treatment comes from the secondary treatment plant. Anaerobic conditions in sludge digesters allow methanogens to thrive. Aerobic conditions in secondary treatment reduce BOD and involve the action of aerobic microbes.

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