The City of Santa Cruz faced an
issue with water stratification as well as high Disinfection By-Products
(DBP’s) levels after changing from ground water to surface water. The thermal
stratification led to insufficient disinfectant circulation throughout the tank.
The lower circulation, lower residual levels and the change in water source
resulted in increased consumption of disinfectant leading to higher levels of
DBPs formed during the disinfection process. The site affected by the change
houses four 1,500,000 gallon potable water storage tanks manufactured by
Superior Tank Co., Inc.
To reduce operating costs, improve
water quality and ensure EPA compliance for DBP levels the City implemented a
pilot program to compare the different industry leading in tank active mixing
and DBP removal systems. After comparing several products the City selected a
system consisting of a floating spray nozzle and associated stratification
elimination equipment. Since installing this system the City has achieved a 40%
reduction in DBP and dramatically improved disinfectant mixing with excellent
operating cost efficiency.
Superior Tank Solutions supplies
and installs a full range of mixing and DBP elimination systems custom designed
to your specific needs.
