Q. Which of the following in sewage treatment removes suspended solids ?
A) Tertiary treatment
B) Secondary treatment
C) Primary treatment
D) Sludge treatment
Explanation
[Solution] Primary treatment physically removes floating debris and suspended solids by filtration and sedimentation. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.