2012
DOI: 10.1016/j.desal.2011.08.030
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Analysis of an ultrafiltration model: Influence of operational conditions

Abstract: Abstract:Ultrafiltration is a widely used technique to remove hazardous pollutants from wastewaters. Membrane dynamic ultrafiltration (UF) models have been widely with time. For severe fouling conditions, the linearity found in the initial membrane fouling resistance with TMP was also the highest. A linear correlation between the initial membrane fouling resistance and the temperature was also found for the experimental conditions tested. However, it was found that, above a certain temperature, increasing temp… Show more

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Cited by 17 publications
(14 citation statements)
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“…(21) For an ultrafiltration unit based on a tubular ceramic membrane and for superficial velocities of retentate inside the tube over 2 m/s, the following values of parameters in eq. 21were reported [49][50][51][52]: R 0 =2-1210 13 m -1 and r g / c Xg =3-8´10 9 s -1 .…”
Section: Total Ultrafiltration Permeate Fluxmentioning
confidence: 99%
“…(21) For an ultrafiltration unit based on a tubular ceramic membrane and for superficial velocities of retentate inside the tube over 2 m/s, the following values of parameters in eq. 21were reported [49][50][51][52]: R 0 =2-1210 13 m -1 and r g / c Xg =3-8´10 9 s -1 .…”
Section: Total Ultrafiltration Permeate Fluxmentioning
confidence: 99%
“…One of the main advantages of the models developed by Hermia is the physical meaning of their phenomenological coefficients, as they allow a deeper comprehension of the fouling mechanisms taking place onto the membrane surface and/or inside its pores. The main hypotheses of each fouling mechanism are well described in the literature [22,25] and can be resumed as follows: if the solute molecules have a much smaller size than the membrane pores, they can enter in the pores, attach to their walls and diminish the internal diameter of such pores (standard blocking); when solute molecules are approximately of the same size as membrane pores, these molecules are able to seal the pore and accumulate one on each other (intermediate blocking) or they form a monolayer (complete blocking); if the solute molecules cannot pass through the membrane pores as the former ones are much bigger than the latter, solute molecules can form a cake on the membrane surface (cake/gel layer formation).…”
Section: ( )mentioning
confidence: 99%
“…In addition, the steady-state permeate flux obtained is greater at 3 m/s than that achieved at 1 m/s. This pattern can be explained by the greater the shear stress that high crossflow velocity causes on the proximity of the membrane surface and thus, the solute molecule deposited as a cake layer on the membrane surface diminishes [25,36]. In addition, concentration polarization has been reported to be a significant foulant phenomenon to take into account [37][38][39][40].…”
Section: Network Architecturementioning
confidence: 99%
“…The resistance in a series model based on Darcy's law was investigated; it was based on the dependence of the flux on the pressure gradient and viscosity (μ) . A general membrane‐fouling model that accounted for the internal clogging, partial and total clogging, cake deposition, and cake deposition with retro flux for an ultrafiltration system was developed by Ghaffour .…”
Section: Introductionmentioning
confidence: 99%