Q. Activated sludge have the ability to settle quickly so that it can
A) Be rapidly pumped back from sedimentation to aeration tank
B) Absorb pathogenic bacteria present in waste water, while sinking to the bottom of the settling-tank
C) Be discarded and anaerobically digested
D) Absorb colloidal organic matter
Explanation
Activated sludge should have the ability to settle quickly so that it can be rapidly pumped back from sedimentation to aeration tank
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.