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Bench-scale screening tests of nanofiltration (NF) membranes were conducted toassess the efficacy of NF for removal of target organic solutes from conventionally treatedsurface water. The performance of each membrane was evaluated at recoveries of 50 to 95%, ata constant permeate flux of 19 gfd. Total organic carbon (TOC) rejection was 92 to 95% forFilmtec NF 90 and NF 270 membranes but substantially lower for NTR 7450. Disinfection byproduct(DBP) precursor rejection was highest for NF 90 (86- 90%) and lowest for NTR 7450.NF 90 produced rejections of microcystin, geosmin, and MIB exceeding 97, 95, and 91% for allrecoveries; however, geosmin and MIB passage through NTR 7450 was 78% or greater for allrecoveries. The bench scale results can be used to distinguish between the performancecapabilities of NF membranes and guide membrane selection for pilot plant testing. Includes 9 references, tables, figures.

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Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 8File Size: 1 file , 240 KB