NEETBiologyMicrobes in Human WelfareMCQ+4 / −1
The domestic sewage in large cities :
- Ahas very high amounts of suspended solids and dissolved salts
- Bhas a high BOD as it contains both aerobic and anaerobic bacteria.
- Cis processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
- DWhen treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
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