The Wastewater Treatment Process

A treatment plant uses a series of treatment stages (primary and secondary) to clean the water so that it may be safely released into a lake, river, or stream.

Primary treatment removes about 60 percent of suspended solids from wastewater. This treatment also involves aerating (stirring up) the wastewater, to put oxygen back in.

Secondary treatment removes more than 90 percent of suspended solids.

The Primary Treatment Process

  • Screening
  • Pumping
  • Aerating
  • Removing sludge
  • Removing scum
  • Killing bacteria
  • Wastewater Residuals (Solids)

Wastewater Treatment Process

Additional Information