Using Resources

• In the UK potable water is produced by...

  • choosing an appropriate source of fresh water
  • passing water through filter beds to remove any solids
  • sterilising to kill microbes.
• What are sterilising agents for potable water?

  Sterilising agents for potable water include ozone, ultraviolet light, and chlorine

  Chlorine is a toxic gas so the amount added to water has to be measured carefully

  Ultraviolet light avoids adding chemicals to the water but is more expensive.
• How is desalination carried out?


  Reverse osmosis