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Impact of Ultrafiltration Operating Conditions on Membrane Irreversible Fouling by G.F. Crozes; J.G. Jacangelo; C. Anselme; J.M. Laîné is a Engineering article available to read on EtoBox.

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The main limitation of the ultrafiltration (UF) process identified in drinking water treatment is membrane fouling. Although adsorption of natural organic matter (NOM) is known to cause irreversible fouling, operating conditions also impact the degree of irreversible fouling. This study examined the impact of several operating parameters on fouling including flux, concentrate velocity in hollow fibers, backwash frequency, and transmembrane pressure. A hydrophilic cellulose derivative membrane and a hydrophobic acrylic polymer membrane were used to conduct these tests. Pilot testing showed that when short-term reversible fouling was limited during a filtration cycle by increasing the concentrate velocity. reducing the flux, and increasing the backwash frequency, the evolution of the membrane toward irreversible flmling could be controlled. It appeared that operating parameters should be adjusted to maintain the increase of transmembrane pressure below a certain limit, determined to be approximately 0.85 to 1.0 bar for the tested UF membrane, in order to minimize the rate of irreversible fouling. This threshold for transmembrane pressure was confirmed empirically by compiling data fr

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Author

G.F. Crozes; J.G. Jacangelo; C. Anselme; J.M. Laîné

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0376-7388)

Published

1997

Language

EN

Field

Engineering (Physical Sciences)