Wastewater Treatment Plant - Process Overview

The City’s Wastewater Treatment Plant (WWTP) uses a variety of processes to remove pollutants from wastewater. These include:

  • Preliminary Treatment: mechanical processes to remove larger inorganic materials from wastewater (grit & screenings)
  • Secondary Treatment: biological process (via microorganisms) to remove organic materials from wastewater (TSS & BOD)
  • Sludge Dewatering: chemical and mechanical processes to  reduce water content of wastewater sludge
  • Effluent Disinfection: chemical process to reduce presence of potential pathogens (as indicated by fecal coliform concentrations)

The two main byproducts of these processes are dewatered sludge and final effluent. Click on the figure below for a detailed description of each process.

Wastewater Treatment Plant - Vital Statistics

  • Original Construction Year: 1977
  • Original Design Capacity: 5.5 million gallons per day (MGD)
  • Most Recent Major Upgrade: 1995
  • Current Design Capacity: 9.3 MGD with peak flow of 22.9 MGD
  • Average Conventional Pollutant Removal Rate: 95%