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Topic Content:
- Treatment of Water for Town Supply
- Aeration
- Coagulation and Flocculation
- Sedimentation
- Filtration
- Disinfection
- pH Measurement
- Distribution
The treatment of water usually passes through the following stages: aeration, coagulation, flocculation, sedimentation, filtration, disinfection, pH measurement, and distribution.
1. Aeration:
The untreated water from the source (rainfall, river, and lakes) is aerated i.e. bringing water and air in close contact. This helps to remove iron(III) ions and other volatile chemicals like hydrogen sulphide, carbon(IV) oxide. Oxygen is added to water through aeration and can increase the palpability of water, by removing the flat taste.
2. Coagulation
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