Ultraviolet (UV) Treatment

The Trojan UV Signa disinfection system was designed to treat the Plant’s maximum flow of 28 MGD.  This system is operational from May to October each year, which is considered the recreation season in waterways in Illinois.  The UV system consists of 96 ultraviolet lamps, which emit a 254 nm wavelength of light.  The wastewater travels through channels glowing with the light of the UV lamps. The UV light permanently alters the DNA structure of pathogenic organisms within the wastewater. As a result, the organisms are no longer able to reproduce, and become non-infectious. After UV disinfection, the wastewater has been fully treated and is returned to the environment.