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March 2013 Emerging Technologies Disinfection prepared 2012 Technology Summary Low Pressure High Output Lamps for UV Disinfection Objective: State of Development: Reduce energy consumption for UV disinfection by Emerging. replacing medium pressure lamps with low pressure low output lamps. Description: Low-pressure high-output lamps are similar to low-pressure low-intensity lamps except that a mercury amalgam is used instead of mercury gas. Comparison to Established Technologies: In some cases, WWTPs can save on energy costs by specifying low-pressure low intensity lamps. The power draw can be significantly lower than medium-pressure lamps. Tradeoffs are (1) a larger footprint for the same disinfection level, which can be significant because as many as 20 low-pressure low-intensity lamps are needed to produce the same disinfecting power as one medium-pressure lamp, and (2) higher operating costs for maintenance and change out of additional lamps. Leong et al. (2008) reported that the energy demand for low-pressure high-output systems is similar to that of low-pressure low-intensity systems. Thus, low-pressure high-output lamps may be a good option for reducing the number of lamps and footprint while keeping the energy requirements low. Salveson et al. (2009) presented results of a pilot test at the Stockton, CA WWTP comparing design conditions and operation of medium pressure and low-pressure high-output lamps. The power draw for the low-pressure high-output lamps was between 20 and 30 percent of the power draw for the medium pressure lamps, reducing annual O&M costs significantly. These results are similar to information reported from one manufacturer for a 30 mgd plant treating secondary effluent. Available Cost Information: Information not available. Vendor Name(s): Calgon Carbon Corporation P.O. Box 717 Pittsburgh, PA 15230 Telephone: 800-4CARBON or 412-787-6700 Fax: 412-787-6676 info@calgoncarbon-us.com Key Words for Internet Search: Installation(s): Results of a pilot test at the Stockton, CA WWTP were reported in the report referenced below by Salveson et al. (2009). UV disinfection, low-pressure low intensity lamps, low-pressure high-output lamps. Data Sources: Salveson, A., T. Wade, K. Bircher, and B. Sotirakos. 2009. High Energy Efficiency and Small Footprint with High-Wattage Low Pressure UV Disinfection for Water Reuse. Presented at the International Ultraviolet Association (IUVA)/ International Ozone Association (IOA) North American Conference. May 5, 2009. Boston, MA. Leong, L.Y.C., J. Kuo, and C Tang. 2008. Disinfection of Wastewater Effluent— Comparison of Alternative Technologies. Water Environment Research Foundation (WERF), Alexandria, VA. USEPA (2010) Evaluation of Energy Conservation Measures for Wastewater Treatment Facilities. Office of Water. EPA 832-R-10-005 September 2010. http://water.epa.gov/scitech/wastetech/upload/Evaluation-of-Energy-Conservation-Measures-for-Wastewater- Treatment-Facilities.pdf Wastewater Treatment and In-Plant Wet Weather Management 6-19PDF Image | Emerging Tech for Wastewater Treatment
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