Chemical
Disinfection
by
Chlorine
Chlorine and its compounds are the common chemical disinfectants. Comparatively they are less harmful and more effective. They are quick in action. In the presence of moisture chlorine is highly corrosive to all metals except silver and lead.
The chlorination process may be of two types. In pre-chlorination method chlorine is applied prior to any other treatment, usually for controlling algae, taste and odor. In post-chlorination method chlorine is applied after other treatment processes, especially after filtration.
