Nallavally is the oldest Vana Samrakshana Samithi of which district?

Waste water released by different users are collectively called

Sewage contain

The process involved in treatment of waste water

Which gas kills harmful disease causing organisms in waste water?

Microbes of cholera and typhoid grow more in

How much percentage of fresh water exist in glaciers?

Activated sludge contain the following percentage of water

Cleaning of water is a process of removing

Dried sludge is used as

Pumping of water into air for purification is called

Which of the component is essential for metabolic activity?

It is an example of organic impurities

The following is an organic impurity came from agriculture industry

The instrument used to remove oil and grease in sludge is