Biology, asked by monisahums, 4 months ago

why secondary treatment in stp is commerically important​

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Answered by ravipathak5876
1

Answer:

answers

Explanation:

The secondary stage of treatment removes about 85 percent of the organic matter in sewage by making use of the bacteria in it. The principal secondary treatment techniques used in secondary treatment are the trickling filter and the activated sludge process.

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