Chlorine Disinfection Water Treatment

Underchloric acid hocl reacts faster than hypochlorite ions ocl.

Chlorine disinfection water treatment.

Drinking water supplies in the united states are among the safest in the world. Water system pipes develop a layer of biofilm scum that makes killing germs more difficult 5. The first continuous use of chlorine in the united states for disinfection took place in 1908 at boonton reservoir on the rockaway river which served as the supply for jersey city new jersey. Wastewater technology fact sheet.

Research shows that chloramine and chlorine both have benefits and drawbacks. The level of underchloric acid will decrease when the ph value is higher. Chlorination was achieved by controlled additions of dilute solutions of chloride of lime calcium hypochlorite at doses of 0 2 to 0 35 ppm the treatment process was conceived by john l. Disinfection with chlorine will take place optimally when the ph is between 5 5 and 7 5.

Drinking water sources are subject to contamination and require. Water providers may temporarily switch from chloramine to chlorine disinfection to help remove this scum. However even in the u s drinking water sources can become contaminated causing sickness and disease from waterborne germs such as cryptosporidium e. Chlorine is a highly effective method of disinfection.

The most common use of chlorine in water treatment is to disinfect water. Environmental protection agency epa allows drinking water treatment plants to use chloramine and chlorine to disinfect drinking water. When many people think about water disinfection chlorine is the first treatment method that comes to mind. Us epa ow owm water permits division subject.

Other methods of disinfection such as ultraviolet and ozonation are effective disinfectants but they do not provide a residual to prevent pathogen regrowth as chlorination does. It is 80 100 more effective. Since 1972 capco water solutions has been providing three industry standard disinfection technologies including electro chlorination chlorine dioxide gas feed instrumentation. Fact sheet on disinfection one of the primary mechanisms for the inactivation or destruction of pathogenic organisms.

The effectivity of disinfection is determined by the ph of the water. Coli hepatitis a giardia intestinalis and other pathogens. Chlorination has been used very successfully to disinfect water at the municipal level for many years and it s still the best type of treatment for specific types of water problems. As a disinfectant it has drawbacks but it also has advantages.

Visit our contact us page to submit an enquiry. The epa first published a water treatment manual on disinfection in 1998.