Method of Chlorination

Method of Chlorination

Method of chlorination For disinfecting large bodies of water, chlorine is applied either as chlorine gas, chloramines or perchloron.

Chlorine gas is the first choice, because it is cheap, quick in action, efficient and easy to apply. Since chlorine gas is an irritant the eyes and is poisonous, a special equipment known as 'chlorinating equipment' is required to apply chlorine gas to water supplies.

Chloramines are loose compounds of chlorine and ammonia. They have less tendency to produce chlorinous tastes and give a more persistent type of residual chlorine. The greatest drawback of chloramines is that they have a slower action than chlorine and therefore they are not being used much in water treatment.

Perchloron or high test hypochlorite (HTH) is a calcium compound which carries 60-70% of available chlorine. Solutions prepared from HTH are also used for water disinfection.

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