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ETV Report:Siemens Model H-4XE-HO Open Channel UV System
Citation:
NSF International. ETV Report:Siemens Model H-4XE-HO Open Channel UV System. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/123, 2009.
Impact/Purpose:
To inform the public.
Description:
Verification testing of the Siemens Barrier Sunligt H-4XE-HO UV System was completed at the UV Validation and Research Center of New York (UV Center), located in Johnstown, NY. The H-4XE System utilizes 16 high-output, low-pressure lamps oriented horizontally and parallel to the direction of flow. The lamps are housed in two modules, each containing eight lamps. The objective of this verification was to verify the performance of the system within a broad operational envelope, taking into account flow rate (verified at flow rates of up to 868 gallons per minute (1.25 million gallons per day)), UV sensor reading, and UV sensitivity. Operation within this envelope results in successful disinfection for the targeted organisms. Biodosimetric tests were conducted at a simulated total attenuation factor of 80%, representing the combined effects of the end-of-lamp-life (EOLL) and lamp fouling factors. The total attenuation factor for the H-4XE System was simulated by lowering the water transmittance for three nominal UVT values, 80%, 65%, and 50%, which are conditions reflective of secondary effluent and reuse applications. The actual UVT levels attained for the simulation of the 80% sensor attenuation were 74.5%, 60.4% and 45.8%, respectively. The reported Reduction Equivalent Dose (RED) is based on the collimated-beam dose-response curve generated on a seeded influent sample from the same day of testing. A total of 31 flow tests, using three different coliphage (MS2, Q and T1), were conducted. The test data was used to develop a RED performance algorithm that described the performance of the UV system over a range of observed RED. A validation factor was determined to account for biases and experimental uncertainty that allows determination of the credited RED for various UV transmittances. Headloss through the lamp modules was measured and the velocity profile was measured to document the hydraulic profile of the system. Power consumption was determined at 100 percent power. The data collected and verified from this testing is multi-variant and also provides a flexible and detailed set of information to allow a knowledgeable engineer to design a UV disinfection system for secondary wastewater and water reuse applications.
URLs/Downloads:
ETV Report:Siemens Model H-4XE-HO Open Channel UV SystemETV Verification Reports & Summaries