Water Treatment Crossword

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Across
  1. 3. Activated material that traps odours, taste, and colour
  2. 5. Nutrient removed to prevent algae growth in rivers
  3. 7. Thick, soil-like product used as fertilizer after wastewater treatment
  4. 8. Largest wastewater treatment plant in Waterloo Region
  5. 10. Region of Waterloo’s drinking-water plant on Ottawa Street
  6. 13. Disinfectant added last to keep drinking water safe in pipes
  7. 14. Chemical coagulant used at Mannheim to make fine particles stick together
  8. 17. Stage where heavy floc sinks to the bottom of deep tanks
  9. 21. Used water from homes that travels to the treatment plant
  10. 22. Process that removes fine particles using sand or carbon layers
  11. 24. Local river receiving treated effluent and supplying surface water
  12. 25. Treated wastewater released safely back to the Grand River
Down
  1. 1. Type of light that disinfects water by damaging bacteria DNA
  2. 2. Clumps of particles formed when coagulant is added
  3. 4. System of underground pipes that delivers clean water to homes
  4. 6. Tank where solids settle and clear liquid flows out
  5. 9. Step where polymer or alum helps small particles clump together
  6. 11. Settled solids removed from clarifiers or digesters
  7. 12. Term describing how clear treated water becomes after filtration
  8. 15. Large storage area where raw river water rests before treatment
  9. 16. Airtight tank where bacteria break down solids without oxygen
  10. 18. Gas bubbled into water to kill germs and improve taste and smell
  11. 19. Location where surface water enters the plant from the Grand River
  12. 20. Step where air is pumped in to support helpful bacteria
  13. 23. Gas pumped into aeration tanks to help microbes break down waste