AWWA WQTC69456

This paper presents an alternate validation protocol that uses Lagrangian actinometry to measure the dose-distribution in a reactor which, when integrated with the dose-response kinetics of a targeted pathogen, predicts the log-inactivation of the targeted pathogen. The new protocol responds to the regulatory validation requirements directly, and in effect provides a clear understanding of the performance and behavior of a reactor when addressing any pathogen of concern. Results of work done at Purdue University and the Ultraviolet (UV) Center in New York have been presented at several venues, including most recently at ACE 2008. This new presentation builds on these prior discussions of the dyed-microspheres technology, providing the protocol by which the dyed-microspheres approach can be used to validate a UV reactor. Supported by NYSERDA, AwwaRF, NYCDEP and others, the protocol has been developed in the context and format of the UVDGM. Field efforts to demonstrate and refine the method entailed large-scale validations that included T1 and MS2 coliphage biodosimetry in conformance with the U.S. Environmental Protection Agency (USEPA) Ultraviolet Disinfection Guidance Manual, and simultaneous actinometry with dyed-microspheres. Alternate hydraulic and intensity field conditions were imposed on the reactors, and laboratory and statistical analysis techniques were developed and demonstrated for the actinometry protocol. Additionally, testing with dye microspheres was completed in parallel with live adenovirus tests. Includes 7 references, figure.