Water for Drinking

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Across
  1. 4. The process at the start of the cleaning procedure which removes large solids from the water. (9)
  2. 7. The process of cleaning seawater for drinking and wastewater for disposal. (5,9)
  3. 8. The breakdown of solid remnants without oxygen. (9)
  4. 9. The solid remains of wastewater after cleaning. (6)
  5. 10. Saltwater has _____ salt particles. (9)
Down
  1. 1. Another way of saying drinking. (7)
  2. 2. This occurs when solids precipitate out of still water. (13)
  3. 3. A substance with no other chemicals in it. (4,5)
  4. 4. Killing off microbes in water using chemical agents or UV light. (10)
  5. 5. The process of separating a liquid from a soluble solid. (12)
  6. 6. A collection of liquid, solid and chemical waste materials from homes and businesses. (6)
  7. 8. The breakdown of chemicals and other particles using oxygen. (7)