WATER QUALITY
Slides in this set (1)
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- Water MUST be free from poisonous salts (phosphates and nitrates) and harmful microbes. It can cause disease such as cholera and dysentery.
- Treatment:
- 1. Water passes through a MESH SCREEN -> to remove bits and twigs.
- 2. Chemicals are added to make solids and microbes STICK together and fall to the bottom
- 3. The water is then FILTERED through gravel beds to remove all the solids.
- 4. Water is CHLORINATED to KILL off any harmful microbes left
- Filters that contain carbon or silver to remove substances from their tap water.
- CARBON - Removes chlorine taste
- SILVER - Kill substances