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Water Treatment
Question | Answer |
---|---|
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. |