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AWWA WQTC71605
- New Approaches for Optimizing UV Validation Testing
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
$12.00$24.00
Validation testing defines the ultraviolet (UV) dose equations that are used to size UV systems for agiven application and are programmed into the UV system's programmable logic controller (PLC) for dose deliverymonitoring. The U.S. Environmental Protection Agency (USEPA) UV Disinfection Guidance Manual (DGM) provides recommended approaches for validatingUV reactors that include QA/QC and approaches for analyzing validation data. Sincethe UVDGM was published in 2006, advances in UV validation methods haveimproved the accuracy and precision of validation testing. Calculated dose monitoringalgorithms have been developed that better account for the true relations between reduction equivalent dose (RED) and the independent variables of flowrate, UV transmittance (UVT), and lamp UV output, and account for the impact of microbe UV sensitivity on RED. CAF index calculations that quantifylamp aging and fouling as well as new criteria for test microbe UV dose-response alsoimprove the accuracy and precision of validation testing. Includes 2 references, table, figures.
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