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How Wastewater is Treated
How Wastewater is Treated  at a Wastewater Treatment Plant

1. Primary Treatment
Solid particles & objects are captured in grit screens and primary clarifiers.

2. Aeration/Secondary Treatment
Wastewater is aerated to support growth of microorganisms that remove harmful pollutants.

3. ClarificationHow Wastewater is Treated inside a Wastewater Treatment Plant
Solids and microorganisms settle out in large basins.

4. Advanced Treatment
Wastewater flows through sand filters to remove fine particles.

5. Disinfection
Water is disinfected to remove any remaining pathogens then released back into creeks to flow downstream.

Videos about;
     Wastewater treatment process   
     Science of wastewater treatment and testing
     Annual wastewater performance report

"Aqua Venturer" (game about wastewater)

Water Environment Federation Educational Brochure.