Biology, asked by sameerkumar159, 8 months ago

During the primary treatment of sewage, solid particles that settle down are called
(a) flocs
(b) primary sludge
(c) activated sludge
(d) anaerobic sludge.

Answers

Answered by CUPCAKE2103

2

Answer:

During the primary treatment of sewage, solid particles that settle down are called

(b) primary sludge

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