UV SYSTEM TECHNOLOGY SELECTION FOR METROVANCOUVER'S COQUITLAM UV DISINFECTION PROJECT

摘要

Metro Vancouver is planning a new 1,200 ML/day UV disinfection facility for the Coquitlam supply to meet Health Canada's new requirements for 3-log Cryptosporidium inactivation. To select a UV system that will provide high disinfection performance cost effectively, two medium-pressure (MP) and two low-pressure high-output (LPHO) UV systems were evaluated using UV Cost Analysis Tool (UVCAT) computer model.UVCAT results confirmed that all UV systems could meet UV dose delivery requirement for 3-log Cryptosporidium inactivation for the full range of design flow and UVT and with a 10-unit train configuration. Life-Cycle Cost of UV systems designed to meet a T1 RED (reduction equivalent dose) were 40 percent lower than those based on MS2 RED design.