UV System Performance Validation for the Seymour- Capilano Filtration Plant UV Disinfection Facility

摘要

Following it’s completion in 2008, Greater Vancouver’s Seymour-Capilano Filtration Plant will contain the world’s largest operational UV facility for the disinfection of drinking water. Validation testing was used to create a model for the calculation of the reduction equivalent dose, having a validation envelope that fully encompassed the expected operational range of flow and water quality as well as the associated UV system operational parameters needed to maintain the required dose. Additional validation data was collected for the development of prediction models for UV intensity, power consumption and headloss for use in the UV systems control strategy and demonstration of compliance with performance guarantees. In addition to the off-site validation of the UV system, on-site performance testing is also to be conducted following installation of the UV equipment. On-site performance testing will include confirmation of performance guarantees including head loss, power consumption and biodosimetry based dose delivery evaluation. On-site biodosimetry testing is host to several challenges that are unique to a water treatment facility as compared to a test facility that has specifically been designed for the sole purpose of UV unit validation. Such challenges at the Seymour-Capilano Filtration plant included the dechlorination of the source water, determination of injection points for the challenge organism and UV absorber, confirmation of adequate mixing prior to influent and effluent sampling ports, management and discharge of the UV unit effluent.