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AWWA WQTC64058

AWWA WQTC64058 Full-Scale Water Quality Comparison of Single-Pass Reverse Osmosis to Dual-Pass Nanofiltration for Seawater Desalination

Conference Proceeding by American Water Works Association, 11/01/2006

Tseng, Tai; Cheng, Robert C.; Wattier, Kevin L.

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To provide clear and quantifiable answers to water quality and Osup2/sup) process. Dow Filmtec NF90 membranes were selected for pass 1 and theSaehan NE90 seawater membranes were selected for pass 2. Train 2 isconfigured to evaluate traditional single-pass SWRO, where HydranauticsSWC3+ membranes were selected as the RO membrane. Identical EnergyRecovery Incorporated (ERI) pressure exchangers are used on both the SWROand NFsup2/sup trains to allow for an "apples to apples" comparison on how much thesedevices aid in lowering energy consumption. The permeate and brine from bothtrains are recombined to reconstitute raw seawater and then discharged backinto the ocean. This allows for aggressive research without the risk ofendangering the public water supply. Power monitors for each process (MF,SWRO, and NFsup2/sup) are incorporated to accurately determine actual power costs. Includes 10 references, tables, figures.

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