Q. What would happen if oxygen availability to activated sludge flocs is reduced?
A) It will slow down the rate of degradation of organic matter
B) The centre of flocs will become anoxic, which would cause death
C) Flocs would increase in size as anaerobic bacteria would grow around flocs
D) Protozoa would grow in large number
Explanation
The centre of flocs will become anoxic, which would cause death. Without oxygen the microbes cannot survive There are certain bacteria lives in anoxic condition example Clostridium tetani
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.