Question

Sewage treatment processes involve
(a) removal of solid material.
(b) sedimentation.
(c) aeration of clarified water.
(d) all of these.​

Answer 1

Answer:

(d) all of these is the correct answer.

Answer 2

Answer

Sewage treatment processes involve

removal of solid material.

sedimentation.

aeration of clarified water. all of these