Investigating the performance of a UV/H sub(2)O sub(2) integrated flow-through system followed by free chlorine

• Published in: Water science & technology. Water supply Vol. 12; no. 6; pp. 715 - 719
• Main Authors: Chu, Xiaona, Hu, Jiangyong, Xu, Yang
• Format: Journal Article
• Language: English
• Published: 01.01.2012
• Subjects: Salmonella typhimurium
• ISSN: 1606-9749; 1607-0798
• DOI: 10.2166/ws.2012.046

Ultraviolet (UV) irradiation is an emerging technique for drinking water disinfection due to effective removal of enteric pathogens without generation of disinfection by-products (DBPs). In order to overcome the drawback of UV irradiation the integration of UV disinfection with sequential disinfectant was proposed. Among all the possible combinations and sequences, a UV/H sub(2)O sub(2)-Cl sub(2) integrated system has proven to be effective in many previous studies. In this study, a UV/H sub(2)O sub(2) flow-through system followed by free chlorine was built and studied. MS-2 coliphage, as a model for a waterborne virus, were inactivated to evaluate the disinfection capacity. Assimilable organic carbon (AOC) tests and an Ames assay using Salmonella typhimurium TA98 and TA100 on such a proposed integrated system were also performed to determine re-growth potential of bacteria and genotoxicity, respectively. Briefly, such a proposed flow-through system was effective in removal of MS-2 coliphage and no genotoxic potential was detected according to the results; however, an increase of AOC may raise concerns of bacterial re-growth along the subsequent distribution system.