Question

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

Answer 1

Answer:

Wastewater treatment generates a large quantity

of sludge, which can be treated by

(a) digesters ✔

(b) activated sludge

(c) chemicals

(d) oxidation pond

Answer 2

Answer:

Wastewater treatment generates a large quantity

of sludge, which can be treated by

(a) digesters ✔✔

(b) activated sludge

(c) chemicals

(d) oxidation pond