Odor Control

The City and County of Broomfield protects public health and the environment by treating the community wastewater through a state-of-the-art 12 million gallon-per-day treatment facility. While wastewater in its natural state produces various odors, Broomfield's policy is to be a good neighbor by minimizing odors as a part of the normal operation of the wastewater treatment facility. The treatment plant is continuously monitored for odor releases and issues are responded to in the following ways:

  • Add chemicals or biological enzymes at certain points in the collection system prior to the wastewater treatment facility
  • Treat odors using a biofilter with an odor removal efficiency of approximately 96%. In addition, the H2S removal efficiency is above 99%. The biofilter is significantly reducing the potential odorous emissions from the process air being collected and treated.
  • Add ferric chloride to wastewater entering the treatment plant to reduce hydrogen sulfide concentrations and generation
  • Continually explore solutions to odor issues
  • Online Odor Report Form
  • Respond quickly to citizen complaints. The Wastewater Treatment Division makes every effort to respond to odor complaints promptly and effectively.

Odor Control Devices

Biological Treatment

Foul air is passed through a biologically active filter bed where bacteria digest contaminants and neutralize odors.

Chemical Addition to the Wastewater Flow

Ferric chloride is added directly to the incoming flow of wastewater. The ferric chloride reduces hydrogen sulfide formation and begins to neutralize odors.

Contained Facilities

Several processes at the treatment facility are enclosed in buildings and/or with surface covers. The air is treated through the biofilter before it's released into the environment.