WATER TREATMENT

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Across
  1. 3. Cleaning a filter by reversing the water flow.
  2. 7. A common use for the dried sludge removed from wastewater during treatment.
  3. 8. A pretreatment step where wastewater passes through a bar screen to remove large solids.
  4. 10. The treated water discharged from a treatment plant to a river or consumers.
  5. 11. Step that kills harmful microorganisms in drinking water.
  6. 12. Chemical dosing that destabilizes particles, allowing them to clump together.
  7. 13. The raw water entering a treatment plant.
Down
  1. 1. A chemical that can be used to disinfect water.
  2. 2. A chemical added to drinking water to help prevent tooth decay.
  3. 4. Chemical that helps particles stick together in water treatment.
  4. 5. The process that lets particles settle to the bottom of a tank for collection.
  5. 6. Introducing air to water to remove dissolved gases and oxidize contaminants.
  6. 9. Passing water through sand, media, or membranes to remove suspended particles.