Biology, asked by dsusantasahugmailcom, 1 month ago

secondary treatment of waste water is also known as:

(A) Mechanical treatment (B) Chemical treatment

(C) Physical treatment (D) Biological treatmen​

Answers

Answered by selvakumarvignesh1
1

Answer:

D

separation of water involves 2 stages

primary stage

secondary stage

In secondary stage the water gets purified by using Biological treatment

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