Question

Wastewater treatment generates a large quantity of sludge, which can
be treated by:
a. digesters
b. activated sludge
c. chemicals
d. oxidation pond.


NCERT Class XII
Biology - Main Course Book

Chapter 10. Microbes in Human Welfare

Answer 1

Wastewater treatment generates a large quantity of sludge, which can be treated by oxidation pond.

So, the answer is option d.

Answer 2

The answer is: (d).....................