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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT - PHYSICAL REMOVAL OF PARTICULATE CONTAMINANTS IN DRINKING WATER: POLYMEM UF 120 S2 ULTRAFILTRATION MEMBRANE MODULE, LUXENBURG, WISCONSIN
Citation:
NSF International, AND P. C. Carolla Engineers. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT - PHYSICAL REMOVAL OF PARTICULATE CONTAMINANTS IN DRINKING WATER: POLYMEM UF 120 S2 ULTRAFILTRATION MEMBRANE MODULE, LUXENBURG, WISCONSIN. EPA/600/R-08/124, 2003.
Impact/Purpose:
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Description:
Verification testing of the Polymem UF120 S2 Ultrafiltration Membrane Module was conducted over a 46-day period at the Green Bay Water Utility Filtration Plant, Luxemburg, Wisconsin. The ETV testing described herein was funded in conjunction with a 12-month membrane pilot study funded by the Energy Center of Wisconsin. The Energy Center of Wisconsin chose to participate because the overall scope of the ETV testing fit into the scope of the longer, energy focused study. The testing was performed from March 11, 2002 through April 26, 2002, representing winter/spring conditions when, historically, feed water quality was most difficult to treat. The feed water was Lake Michigan. Verification testing was conducted at optimized conditions based on pilot testing conducted during the 12 months proceeding the verification test period. The testing was performed using a "generic" custom membrane pilot plant (CMPP) capable of operating with a variety of membrane modules that are housed in pressure vessels. Therefore, this ETV testing verified the operation of the membrane module itself, not membrane-specific process equipment. The membrane unit was operated in dead-end mode during two test runs, each at a constant specific flux of 40 and 30 l/h-m2 (24 and 18 gfd), respectively. Feed water recoveries ranged from 89-96 percent. The two test runs were operated for approximately 12.5 and 32.7 days, respectively. The UF module was chemically cleaned using a "proof of concept" effort based on procedures recommended by the manufacturer. The cleaning procedures were effective in restoring membrane productivity. The membrane module achieved significant removal of particulate contaminants and bacteria, producing an average filtrate turbidity of 0.05 NTU and an average of 4.2 log removal of total particles (>2 im in size). Average feed turbidity and total particle counts were 1.3 NTU and 4,281 particles/ml, respectively.