Waste Water Treatment

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Across
  1. 1. Substance that gets flushed out of your home
  2. 3. In this process, the water is exposed to air
  3. 5. This can result from untreated sewage being released
  4. 7. The second step of the treatment process
  5. 10. Where solid wastes are removed and sludge sinks to the bottom
  6. 12. High amounts of oxygen is needed to break this down
  7. 13. The first step of the treatment process
  8. 14. Topic of Presentation
  9. 15. The random label that was on the poster board
Down
  1. 1. Large physical particles are removed in this process
  2. 2. A system that carries the sewage from your home to the treatment plant
  3. 4. The last step of the treatment process and sometimes optional
  4. 6. A harmful plant growth resulting from high BOD
  5. 8. Often the last step in the secondary treatment
  6. 9. The waste that the treatment process gets rid of (Hint: Acronym)
  7. 11. Nitrates and Phosphates make up the bulk of it