Water Treatment Facility UV Disinfection Design
Poughkeepsies’ Joint Water Project Board owns and operates the Poughkeepsies’ Joint Water Treatment Facility (PJWTF). Originally designed to treat up to 12 million gallons per day (MGD), the facility’s capacity has since been expanded to 19.3 MGD. The PJWTF draws its source water from the Hudson River and includes raw water pumps, chemical addition, upflow clarifiers, sedimentation basins, an intermediate pump station, ozone contactors, biologically active filtration (BAF), ultraviolet (UV) disinfection, and high-lift pumps.
The UV disinfection system was one of the first of its kind in New York and the United States. As the reactors neared the end of their useful life, our team conducted an evaluation of the system, reviewing current disinfection technologies, assessing the potential for ozone as a primary disinfectant, and developing recommendations for UV system replacement.
The evaluation concluded that replacing the six individual filter effluent disinfection units offered the most economical and practical solution for the facility. The UV system replacement design accounted for maintaining full plant capacity during construction and also incorporated HVAC upgrades to the filter pipe gallery, along with the design of a compact, dedicated UPS building suited to the site’s limited available space.
Services Snapshot
Tighe & Bond supported both the design, construction and grant funding efforts for this project. Now completed, the upgraded UV system will provides a modernized disinfection process that helps ensure clean, energy efficient, reliable drinking water for the region well into the future.
