Short Note on Disinfection of water

Disinfection of water :- Disinfection of water is required to remove disease producing organisms before it enters distribution system. The material used for disinfection of water is called disinfectants. A good disinfectant should economical and easily available in bulk quantity. It should destroy all harmful bacteria and other organisms. There should be no sludge formation in water. Working of plant, mixing of disinfectant should be simple after disinfectant, the water should not be come toxic and carry no objectionable odour and task. The dose should be such that there is always some residual concentration for protection of water from contamination during storage and conveyance of water through distribution system.

Method of disinfection are as under:-

1. Boiling of water

2. Adding Potassium Permanganate (KMNO4)

3. Excess lime Treatment

4. Ozone gas Treatment

5. Iodine and Bromine Treatment

6. Ultra Violet rays

7. Adding chlorine i.e. Chlorination Minimum residual chlorine should be available at farthest end shall be 0.5 mg per litre. During the monsoon month or if specific complaint are there super chlorination more than 2 DPM of chlorine may be resorted to effectively get rid of bacteria.