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Project: Ultraviolet Disinfection Alternatives Analysis and System Design

Client: Town of Windsor

Faced with an increasing population that would soon outstrip the disinfection capacity of its wastewater reclamation plant, the Town of Windsor looked to Brelje & Race to determine the best means to replace the plant’s 25-year old chlorination gas storage and injection facility. Following rigorous evaluation of several technologies using criteria such as operational needs, constructability, life-cycle costs, reliability and safety, low-pressure UV (ultraviolet light) emerged as the preferred technology to be implemented.

Brelje & Race prepared improvement plans and specifications for the project and secured approval from the California Department of Health Services (DHS) for its operation and performance monitoring. The Town elected to sole-source Infilco Degremont Aquaray 40 equipment for installation and was able to qualify for a low cost loan through the State Revolving Fund because equipment selection was based on a value-engineering approach. When DHS came forward with post-approval requirements for further testing, Brelje & Race assisted the Town in devising methodology and conducting tests to demonstrate that the newly-installed UV disinfection system met Title 22 requirements. The success of the project hinged upon persistent attention to detail and regular communication with Town staff, regulators and the contractor.