Environmental Engineering

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Across
  1. 3. Technique used to remove leaves/dead insect from water.
  2. 6. it should be removed before using water.
  3. 7. One of the ultimate source of water is?
  4. 9. Process in which chemicals is used for removing hardness from water.
  5. 12. Pump used for mixing of coagulant.
  6. 14. Produces a positive electrical charge.
  7. 15. When temporary hard water is boiled, one of the substances formed is?
  8. 17. Ca(HCO3)2 + Ca(OH)2 =?
  9. 19. Process involved in Slow sand filter.
Down
  1. 1. Constituent that causes hardness.
  2. 2. Max time taken by Injection aerators.
  3. 4. Most reliable and economical distribution system.
  4. 5. The process of killing the infective bacteria from the water.
  5. 8. Both temporary and permanent hardness of water can be removed by?
  6. 10. Both temporary and permanent hardness of water can be removed on boiling water with?
  7. 11. For efficient water distribution pressure must be..
  8. 13. The purest form of naturally occurring water is?
  9. 16. Acid used mostly for removal of milk stone is?
  10. 18. Discharge of fountain aerators
  11. 20. The basic process to get rid of bad smell from water.