To provide one-of-a-kind equipment for the Catskill/Delaware disinfection plant capable of treating up to 2 billion gallons of water per day for NYC residents.
In 2005, Trojan Technologies was selected as the manufacturer for the UV portion of NYC drinking water project. In 2009 and 2010, Trojan delivered 56 TrojanUVTorrent™ UV units to the Catskill/Delaware UV Facility. Each unit is capable of delivering a 40 mJ/cm2 dose to 40 million gallons of water per day (MGD). This disinfection requirement, set by the NYC Department of Environmental Protection, delivers greater than 3-log reduction of microorganisms such as Cryptosporidium and Giardia. The TrojanUVTorrent™ was custom designed by Trojan’s engineers and scientists in order to meet the challenging design parameters of this unique project.
The units consist of stainless steel disinfection chambers designed and manufactured by TrojanUV. Inside the chambers is an array of UV lamps inside quartz sleeves that are immersed in the water flow. The units are so large that they include a hatch big enough to allow a person to climb into the unit for maintenance.
“New York City’s water supply has been chlorinated, but there’s been no real treatment, per se,” says Paul Smith, chief of upstate water supply treatment and facilities. “This is the first time we’ve had major water treatment for our supply.”
To satisfy the Safe Drinking Water Act’s requirements, the DEP agreed to build the Catskill/Delaware UV plant to supplement its existing chlorination disinfection facilities. It saved the department money over building a new filtration plant for the Catskill and Delaware watershed.