Q. 44.3( 6 Votes )
purification of water takes place in several steps in water treatment plant:
Screening: when the water source is a lake or river, large contaminants such as plants, polythene or fish are removed.
Coagulation: chemicals are added to attract dirt particles and make them sink to the bottom of the tank.
Sedimentation: As water becomes still, these dirt particles are removed.
Filtration: water passes through several layers of charcoal to filter out remaining particles.
Disinfection: water goes in a tank and chlorine or other disinfecting chemicals are added to it to kill bacteria.
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