Xylem awarded contract to provide UV treatment for safe drinking water in Ohio

Leading global water technology company, Xylem, which is dedicated to solving the world’s most complex water issues, has been awarded contracts worth US$4.8 million to supply cutting-edge ultraviolet (UV) disinfection solutions to two major drinking water plants in the City of Columbus, Ohio, United States (U.S.). The energy-efficient UV technologies will provide an additional treatment barrier for Cryptosporidium at the Dublin Road Water Plant, as well as the Hap Cremean Water Plant which each provide the residents of Ohio with safe, clean drinking water.

Cryptosporidium, a chlorine-resistant parasite which can be spread by swallowing contaminated water, can cause illness with potentially severe symptoms. The parasite, however, can be easily inactivated with a low UV dose.

Both water plant upgrades presented unique and complex challenges. The Hap Cremean Water Plant required a complex retrofit into the existing filter pipe gallery, and a compact UV reactor was needed to allow for maintenance activities and require very few modifications to the existing piping arrangement. Secondly, the UV system needed to achieve the required disinfection standard while maintaining less than 20 inches of head loss so that the hydraulic profile would not be disrupted. To that end, Xylem supplied 24 Spektron 2000e UV reactors, allowing them to meet the challenges posed by the retrofit and offering reliable disinfection at the lowest life-cycle cost.

At the Dublin Road Water Plant, the UV disinfection system also needed to minimise head loss to avoid additional pumping costs while also maximising clearwell volume. Xylem provided five Wedeco K143 UV reactors that enabled the City of Columbus to avoid incurring unnecessary costs.

“The UV facilities will provide an additional treatment barrier at the Dublin Road Water Plant and Hap Cremean Water Plant, enhancing our disinfection capabilities and allowing us to continue to provide safe, reliable, and affordable drinking water for all our customers,” C.R. Weaver, Water Project Manager for the City of Columbus Division for the UV project, said.

“At Xylem, we do not simply provide ‘one size fits all’ solutions; we work closely with our customers to create smart, sustainable solutions to their unique, complex water challenges,” Greg Claffey, Director of Treatment Sales, North America said. “Our proven Wedeco UV technology was selected because it delivered the lowest life-cycle cost, primarily due to the energy efficiency of its low-pressure high-output (LPHO) Wedeco Ecoray lamps and the relative low head loss of the UV reactors. Furthermore, we were able to overcome the challenging requirements associated with the Hap Cremean plant retrofit.”

Construction at both plants is anticipated to begin in 2018, with both the Dublin Road Water Plant UV system and Hap Cremean Water Plant UV system expected to in operation by 2020.