Water purification is the process of removing undesirable chemicals, materials, biological contaminants from contaminated water. Most of our water comes from rivers and lakes. It is necessary to treat the water for human consummation. This is done in a treatment plant. There are different stages involved before water can come out of your tap.
- Pre-chlorination - for algae control and arresting any biological growth
- Aeration - along with pre-chlorination for removal of dissolved iron and manganese
- Coagulation - for flocculation
- Coagulant aids, also known as polyelectrolytes - to improve coagulation and for thicker floc formation
- Sedimentation - for solids separation, that is, removal of suspended solids trapped in the floc
- Filtration - removing particles from water
- Desalination - Process of removing salt from the water
- Disinfection - for killing bacteria.
The EPA, HSE, and EU Drinking water directors composed regulations for Drinking Water: Here are a few examples.
- 200 microgrammes per litre (µg/L) of water must only be present in drinking water.
- 4 parts per million (ppm) of Chlorine is the recommended amount for drinking water.
- 25 microgrammes per litre (µg/L) of lead is the recommended amount in drinking water.
This link is the complete guidelines on drinking water:
- Pre-chlorination - for algae control and arresting any biological growth
- Aeration - along with pre-chlorination for removal of dissolved iron and manganese
- Coagulation - for flocculation
- Coagulant aids, also known as polyelectrolytes - to improve coagulation and for thicker floc formation
- Sedimentation - for solids separation, that is, removal of suspended solids trapped in the floc
- Filtration - removing particles from water
- Desalination - Process of removing salt from the water
- Disinfection - for killing bacteria.
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