+++ 2019 +++

Wastewater Treatment Plant Improvement Project

Wastewater Treatment Plant Improvement Project

A new wastewater treatment plant headworks with influent flow measurement, screening and grit removal needs to be constructed to minimize future loss of lagoon capacity and maintain compliance with the City’s NPDES Permit. In addition, there are a number of treatment process improvements that will increase the organic treatment capacity, including installing baffles, additional aeration, and solids removal.

The project will include: 

  • Influent Box and Flow Meter: Installation of a magnetic flow meter in concrete vault with associated electrical and instrumentation.
  •  Screening Facility: a minimum 2-channel screening system is necessary due to the varying influent flows. A washer-compactor will be installed at each automatic screen.
  •  Grit Removal Facility: vortex grit basin with associated grit washing and dewatering equipment to remove grit throughout the wide range of influent flows. 
  •  Flow Distribution Structure: flow distribution box with two sluice gates will receive flow from the grit basin. Flow can be directed to Cell 2 and/or Cell 3.
  •  Lagoon Upgrades: baffle curtains in Cell 2/3, and additional aeration in Cell 2. Remove solids from Cell 2. Install recirculation system from Cell 3 to 2. This will increase treatment capacity for significant industrial users (breweries, distilleries, cider producers).
  •  Odor Control: install odor control system using biofilter technology at new headworks.

The Wastewater Treatment Plant Headworks Improvement Project keeps the City in compliance with NPDES Permit, accounts for future population growth, and increases capacity to allow for continued growth of fermentation industry under new pretreatment program.