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4.4.1 Water Treatment
Drinking water is initially held in a holding tank / reservoir for settling the suspended matter. Then, the colloidal materials such as clay are removed from water by using flocculant chemicals such as aluminium potassium sulphate (Alum). After flocculation treatment, water is treated by filtration that is passing it through beds of sand or diatomaceous earth. Some microorganisms including protozoan cysts are removed during this process. Finally, water is disinfected with chlorine to kill remaining pathogenic bacteria. |
Last modified: Monday, 19 December 2011, 10:31 AM