Assertion: The municipal waste-water is also called sewage.
Reason: Amalor component of sewage is human excreta.

Municipal sewage BOD values (ppm) are_

Assertion: The Biological Oxygen Demand (BOD) is high in raw sewage. Reason: The greater the BOD in waste water, the lesser is its polluting potential.

In the sewage waste, BOD value is

Why is the sewage water called polluted water?

Assertion: A mere 0.1 per cent impurities make domestic sewage unfit for human use. Reason: Domestic sewage primarily contains biodegradable organic matter.

Define sewage. Explain the the two stages of treatment of sewage water.

Sewage water is purified by