Water Pollution Control Facility

 
 
 

Water Pollution Control Facility

Somerset, MA

filter

About this Project

The Somerset Water Pollution Control Facility is situated close to residential and commercial neighbors. For several years, the neighborhood had complained of odors. As a result, the Town retained FST to investigate the odors and design appropriate corrective measures.

FST initiated a comprehensive sampling and analysis program to quantify and characterize odors from various liquid and solids treatment processes.

A panel of area residents identified odor levels and characteristics in the samples. In addition, samples were analyzed for specific compounds including reduced sulfur compounds, ammonia, and VOCs. The results were used to estimate the odor and specific compound emissions from the sources. The emissions data were then input into a dispersion model to evaluate their impact on the community and to determine processes requiring odor control.

FST studied the odor control alternatives in terms of effectiveness, compliance with regulatory requirements, compatibility with the facility layout, ease of operation and maintenance, safety, and costs (capital, O&M and present worth). FST recommended:

  • The exhaust air from the preliminary treatment building and sludge processing facilities be  treated by a single-stage chemical mist scrubber;

  • The primary settling tanks be covered and the exhaust air treated in a biofilter or a mist scrubber;

  • The exhaust air from the active compost bins, compost room, finished compost storage and curing area, and compost/woodchips screening area be treated in an enclosed biofilter. The outlet air from the biofilter needed to be conveyed through a 50-ft high dispersion stack into the atmosphere.

Each element was designed and constructed, and odor control was achieved.

More Information

Owner: Board of Water & Sewer Commissioners

Location: Somerset, Massachusetts

Highlights: FST initiated a comprehensive sampling and analysis program to quantify and characterize odors from various liquid and solids treatment processes.