Wastewater Crossword

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Across
  1. 3. Activated carbon is purified, powdered form of this material.
  2. 4. Water which can't be used for washing cloths.
  3. 7. A chemical added to drinking water to kill parasite and bacteria
  4. 8. can be used to clean the oil spillage in water
  5. 9. A pipe carrying sewage.
Down
  1. 1. A light which can kill bacteria.
  2. 2. Waste from this industry are colouring agents.
  3. 5. the process by which air is circulated through, mixed with or dissolved in a liquid or substance.
  4. 6. A chemical used to remove the turbidity from the water supply.