Question
Biology Question on Microbes in human welfare
In the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
A
inactivated sludge
B
activated sludge
C
primary sludge
D
secondary sluge
Answer
activated sludge
Explanation
Solution
Activated sludge is formed during secondary sewage treatment. It possess floes of decomposer microbes. Formation of activated sludge requires aeration.