Question
Environmental Studies Question on Pollution
During municipal sewage treatment, biosolids are produced as a by-product of
A
Primary treatment only
B
Biological (activated sludge) treatment only
C
Chemical (physicochemical precipitation of suspended solids) treatment only
D
All three, primary, biological and chemical treatments
Answer
All three, primary, biological and chemical treatments
Explanation
Solution
The correct option is (D): All three, primary, biological and chemical treatments