Impacts of UV-H2O2 Treatment for Taste and Odour Control on Secondary Disinfection

• Main Author: Pantin, Sophie
• Other Authors: Hofmann, Ronald
• Language: en_ca
• Published: 2009
• Subjects: UV-H2O2; disinfection; 0543
• Online Access: http://hdl.handle.net/1807/18973

The Cornwall Water Purification Plant collaborated with the University of Toronto to monitor UV-H2O2 treatment performance. This study includes a review of engineering and operational aspects of UV-H2O2 implementation. A number of operational challenges were experienced with retrofitting UV-H2O2 into the existing treatment plant, and an overview of the challenges and solutions faced at Cornwall is given. The project also includes a thorough water quality analysis. Taste and odour (T&O) events have been monitored for three years and the efficiency of UV-H2O2 on T&O removal is reported. Furthermore, little is known about any potential side effects of the treatment on downstream processes, especially secondary disinfection. The impact of UV-H2O2 on natural organic matter alterations, chlorine stability and disinfection by-product formation is reported using results from full-scale water quality monitoring campaigns at Cornwall, combined with laboratory experiments.