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The aim of water treatment is to produce and maintain water that is hygienically safe, esthetically attractive and palatable, in an economical manner. Water treatment involves physical, chemical and biological changes that transform raw water into potable water. The treatment process used in any specific instance depends on the quality and nature of raw water.
Typical Scheme For Potable Water System
Raw water is pumped to an Aerator, which oxidizes soluble iron in the Raw Water from Ferrous to Ferric State.
Water flows to the Stilling Chamber to break the turbulence State.
Water is then taken into the Flash Mixer for intimate mixing of chemicals with the raw water.
The raw water is dosed with Alum, Lime and Polyelectrolyte to coagulate and flocculate the suspended / colloidal matter and form floc of higher nuclei thereby enhancing the efficiency of sedimentation.
Chemically dosed raw water is then fed into the clariflocculator unit wherein flocculation and clarification of raw water takes place.
The sludge generated in the clariflocculator is bled via Telescopic Bleeds to an underground Sludge Pit. The sludge collected from the plant is finally pumped out.
Clarified water is collected in the launder of the clarifier located on the top periphery from where it flows to the gravity filter for further filtration.
Chlorine dosing is done for disinfection purpose.
Filtered water is collected in filtered water storage tank from where it is pumped to various consuming points.