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This poster paper presents information on the Awwa Research Foundation's Ultraviolet (UV) Knowledge Base, a collection of information on UV technology from 30 utilities and stored in a Microsoft Access database. The information will be used to develop onsite test plans for nine utilities. Phase 2 of the project approach includes:conduct on-site evaluations;develop UV system troubleshooting guide; develop VB analysis tools; and,develop an Internet version of the database. Phase 3 includes: conduct North American survey;analyze results and develop recommendations. A summary of site visits includes:methods developed for field verification of UV sensor and dose monitoringequations; CAF index calculations using sensor equation can evaluate long-term lampaging and fouling;dose monitoring equations developed using field measurements agreedwell with validation data and historic dose monitoring data;significant overdosing can occur due to operation within design conditionsof flow and UVT combined with ballast turndown limitations;significant on-line UVT errors (2%) observed;good agreement with duty and reference UV sensors observed; minimal external sleeve fouling and lamp aging observed; and,internal sleeve fouling can be significant.

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Edition: Vol. - No. Published: 06/01/2007 Number of Pages: 1