Biology, asked by akshaigv892, 1 year ago

Which of the following step involves bacteria in an effluent treatment plant?
(1) Primary treatment
(2) Secondary treatment
(3) Tertiary treatment
(4) All of them

Answers

Answered by Anonymous
4

hi dear....

answer is....

(3) Tertiary treatment.

Answered by Anonymous
13
Hi dear..

Answer is....

(3)Tertiary treatment
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