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disinfection. Only about 1 – 2 % active chlorine are spent on the bactericidal action during the disinfection. The rest part is spent on oxidation of organic and inorganic matters in water. All these connected forms of chlorine form such a notion as “chlorine-absorbability of water”. Different natural waters have different chlorine-absorbability. To disinfect water by such a method, they introduce such amount of chlorine, that the remaining free chlorine should be 0,3 – 0,5 mg/l and the remaining chlorammoniac chlorine – 0,8 – 1,0 mg/l. In such a case the

 

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