What are the different stages in purification of water?

1.	What are the different stages in purification of water?
Answer» 1. Water in rivers, reservoirs and lakes may contain many impurities. 2. Under safe drinking water supply scheme, the water is purified through physical and chemical treatment which includes. a) Coagulation : Adding chemicals to bind with impurities in water forming heavy particles. b) Sedimentation : Making these heavy particles to settle at the bottom. c) Filtration: Passing the upper water through filters to remove remaining undissolved particles. d) Disinfection : Adding chlorine or bleaching powder to kill disease causing micro organisms.

Answer»

1. Water in rivers, reservoirs and lakes may contain many impurities.

2. Under safe drinking water supply scheme, the water is purified through physical and chemical treatment which includes.

a) Coagulation :

Adding chemicals to bind with impurities in water forming heavy particles.

b) Sedimentation :

Making these heavy particles to settle at the bottom.

c) Filtration:

Passing the upper water through filters to remove remaining undissolved particles.

d) Disinfection :

Adding chlorine or bleaching powder to kill disease causing micro organisms.

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