Question

2. State whether the following are true or false-

a) Wastewater is treated in a sewage treatment plant.

b) Sedimentation is done before grit removal.

c) Waste water is treated with chlorine before releasing into the rivers.

d) Scum is used to produce bio gas in water treatment plant.

e) In septic tanks, the aerobic bacteria break down most of the human

excreta into organic matter.

f) In secondary treatment of water, sludge is decomposed to obtain

biogas.​

Answer 1

Explanation:

a) true

b). false

c) true

d). false

e). true

f). true