Water purification and filtration measures to be taken during water supply - Printable Version

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Water purification and filtration measures to be taken during water supply - NKKhare - 11-03-2014

Water purification and filtration measures to be taken during water supply

Hardness due to presence of bicarbonates, sulphates and chlorides, bicarbonates when heated gets converted in carbonate and water becomes soft it is known as temporary hardness,

pH value: water containing alkalies have OH ions and water containing acid have H ions By wt these uncombined H ions are equal to 0.0000001 gram per litre and this will be neutral solution and logarithm of reciprocal of this figure is 7. Therefore pH + pOH=14. pH value determines the amount of alum required for coagulation,

Bacteria present in water needs to be treated with chlorine, removal of sediments and bacteria is by fliters.

other methods are chlorine and ammonia, ozone, uv treatement,

Hardness of water is removed by adding lime soda, zeolite, or carbonaceous substances.

Sedimentation , filtration and sterilization are 3 processes for improving quality of water.

Process of removing suspended solids is sedimentation

Smaller particles and Bacterias cannot be removed by sedimentation have to be removed by filtration.

Sterlization of water is done by addition of chlorine, Ammonia, ozone, UV radiation.

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