Headworks Odor Control Improvements

Leoni Township Wastewater Treatment Plan
Leoni Township, MI

Project Overview

The Leoni Township Wastewater Treatment Plant (WWTP) receives wastewater from thirteen communities, all of which is pumped to the facility. The Headworks Building experienced dangerously high levels of hydrogen sulfide (H2S) gas that posed health and safety concerns for operations personnel, accelerated corrosion of concrete and equipment in the building, and was a nuisance to adjacent property owners. F&V performed a study to determine the H2S levels and provided recommendations.

F&V provided design and FVC provided bid and management the construction of the headworks improvements, while FVOP operates. The project included containing and treating the H2S odors at the grit chamber and Headworks Building by implementing the following items:

  • New make-up air unit to provide tempered air changes to the Screenings Room, as required by code.
  • Covering the existing channels at the grit chamber and Headworks Building Screening Room with solid fiberglass reinforced plastic (FRP) grating.
  • Collecting and conveying odorous air to the treatment units using FRP and stainless steel ductwork and inlet and intake control dampers.
  • New biotrickling filter with a secondary polishing step using granular carbon, with a variable speed FRP fan rated for air flows of 1,850 CFM to 3,700 CFM.