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Water Treatment

Name all five water treatment methods. Screening, Settling, Filtration, Chlorination, Fluoridation.
What happens during the process of screening? Water is run through screens/wire mesh to remove large debris, e.g. leaves and rubbish.
What happens during the process of settling? Aluminium sulphate is added to the water, this causes small insoluble debris to clump together and settle in the bottom of the tank.
What happens during the process of filtration? Water is filtered through beds of sand and all remaining debris removed.
What happens during the process of chlorination? Chlorine is added to the water to kill bacteria and micro-organisms,amount of chlorine added is closely monitored.
What happens during the process of fluoridation? Fluorine is added to water in some countries to help prevent tooth decay.
Created by: amyc123