waste water story

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Across
  1. 3. primary treatment, sedimentation allows solids to settle at the bottom of tanks.
  2. 6. sedimentation tank is used in primary treatment to separate solids from liquids.
  3. 7. is the process of removing large objects like plastic and leaves from wastewater.
  4. 8. treatment uses bacteria to break down organic waste in wastewater.
  5. 11. discharge, treated water is returned to rivers, lakes, or reused.
  6. 12. treatment removes heavy metals, pharmaceuticals, and other pollutants.
Down
  1. 1. is a byproduct of wastewater treatment that can be used as fertilizer.
  2. 2. aeration is used to provide oxygen for bacteria in biological treatment.
  3. 4. tertiary process helps remove nutrients like nitrogen and phosphorus from water.
  4. 5. filtration helps remove tiny suspended particles before disinfection.
  5. 9. sludge is the solid waste collected from wastewater treatment.
  6. 10. is a chemical commonly used for disinfecting treated wastewater.