884510

AWWA MTC50251

NOM Rejection by, and Flux-decline, of Nanofiltration (NF) and Ultrafiltration (UF) Membranes: Scale-up Effects and Optimal Operating Conditions

Conference Proceeding by American Water Works Association , 01/01/1999

Yoon, Yeomin;Amy, Gary;Pellegrino, John;Cho, Jaeweon

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Bench-scale cross-flow (24 in[2]) and pilot-scale single element (2.5x40 in[2] and 4.0x40 in[2]) tests were performed to demonstrate scale-up effects and to define optimal operating conditions for nanofiltration (NF) and ultrafiltration (UF) membranes. Natural organic matter (NOM) rejection and membrane flux decline were studied in bench-scale and pilot-scale tests. A f/k ratio, an important operational parameter, was introduced to define optimal operating conditions and predictions for maximum NOM rejection and minimum flux-decline. It was found that a NF membrane showed similar flux-decline trends and NOM rejection in bench-scale and pilot-scale tests. However, a UF membrane showed scale-up effects in terms of NOM rejection; pilot-scale tests exhibited larger NOM rejection than bench-scale tests using the UF membrane. Includes 7 references, tables, figures.
 

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Edition:
Vol. - No.
Published:
01/01/1999
File Size:
1 file , 160 KB
Note:
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