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In a sewage treatment plant, primary treatment is
Option: 1
Physical process which involves sedimentation only
Option: 2
Physical process which involves both filtration and sedimentation
Option: 3
Biological process which involves formation of primary sludge and effluent
Option: 4
Biological process which involves both filtration and sedimentation
Answers (1)
As we have learnt in Chemicals, Enzymes and other Bioactive Molecules -
sewage treatment plants (STPs) -
sewage cannot be discharged into natural water bodies like rivers and streams directly –
- wherein
Before disposal, sewage is treated in sewage treatment plants (STPs) to make it less polluting.
Hence, the correct option is (b).
View full answer
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