Question

Domestic sewage of large cities.

• A. Has very high amount of suspended solids and dissolved salts
• B. When treated in sewage treatment plant does not require aeration
• C. Has high BOD as it contains both aerobic and anaerobic bacteria
• D. Is processed by aerobic and then anaerobic bacteria in secondary treatment in sewage treatment plant

Answer 1

The correct option is D Is processed by aerobic and then anaerobic bacteria in secondary treatment in sewage treatment plant

Domestic sewage is processed in 3 stages first by aerobic and then by anaerobic bacteria.

Correct answer-D