Biology, asked by anu123435, 1 year ago

why is secondary treatment of water in sewage treatment plant called biological treatment ​

Answers

Answered by ramashishgupta8161
12

When BOD of sewage or waste water is reduced, the effluent is then passed into Settling tank where the bacteria flocs allowed to sediment. ... Secondary treatment of thesewage is also called Biological treatment because in secondary treatment biologicalfactors/organisms play a major role in the treatment.

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Answered by areanshra12
2

Because it is done naturally


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