Overview of concentration polarization in ultrafiltration

Bruin, S.; Kikkert, A.; Weldring, J.A.G.; Hiddink, Jan Geert

doi:10.1016/s0011-9164(00)88613-0

Cited by 24 publications

(8 citation statements)

References 22 publications

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“…According to the resistance model [2,15,16], the permeate flux increases with the transmembrane pressure. As shown in Fig.…”

Section: Mass Transfermentioning

confidence: 99%

“…Most classical models used in the description of concentration polarisation phenomena during membrane crossflow filtration require the knowledge of a mass transfer coefficient, such as the boundary layer resistance model [2,15,16], the osmotic pressure model [13,14] and the gel layer model [13,14]. Such an expression for the mass transfer coefficient should be able to represent the effect of changing conditions in the different systems that are used for membrane filtration.…”

Section: Sherwood Numbermentioning

confidence: 99%

“…An overview of the phenomenon has been published by Blatt et al [1], Bruin et al [2] and Van Den Berg et al [3]. Other numerous works [4][5][6][7][8][9][10][11][12] dedicated to the analysis and the modelling in order to characterise the concentration polarisation phenomenon at membrane crossflow filtration are found in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…Different theoretical models such as the gel polarisation model [13,14], the osmotic pressure model [13,14] and the resistance series model [2,15,16] have been widely used to describe the limiting phenomena and to predict permeate flux. Nevertheless, filtrations permeate flux as well as the limitations encountered such as fouling and concentration polarisation are still difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Concentration polarisation in tubular membranes —a numerical approach

Damak¹,

Ayadi²,

Zeghmati³

et al. 2005

Desalination

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“…According to the resistance model [2,15,16], the permeate flux increases with the transmembrane pressure. As shown in Fig.…”

Section: Mass Transfermentioning

confidence: 99%

Section: Sherwood Numbermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Concentration polarisation in tubular membranes —a numerical approach

Damak¹,

Ayadi²,

Zeghmati³

et al. 2005

Desalination

View full text Add to dashboard Cite

“…It is now believed that to increase membrane flux, it is necessary to increase back transfer of solids from the membrane surface to the bulk solution. These are essentially based on the hydrodynamics and transport properties of the feed solution [Bruin, et al, 1980;Ilias and Govind, 1990;Belfort, et al, 1994]. Some of the popular schemes that have been practiced or are being considered for flux enhancement in cross flow filtration are shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Flux Enhancement in Crossflow Membrane Filtration: Fouling and It's Minimization by Flow Reversal

Ilias¹

2005

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Fouling problems are perhaps the single most important reason for relatively slow acceptance of ultrafiltration in many areas of chemical and biological processing. To overcome the losses in permeate flux associated with concentration polarization and fouling in cross flow membrane filtration, we investigated the concept of flow reversal as a method to enhance membrane flux in ultrafiltration. Conceptually, flow reversal prevents the formation of stable hydrodynamic and concentration boundary layers at or near the membrane surface. Further more, periodic reversal of the flow direction of the feed stream at the membrane surface results in prevention and mitigation of membrane fouling. Consequently, these advantages are expected to enhance membrane flux significantly.A crossflow membrane filtration unit was designed and built to test the concept of periodic flow reversal for flux enhancement. The essential elements of the system include a crossflow hollow fiber membrane module integrated with a two-way valve to direct the feed flow directions. The two-way valve is controlled by a controller-timer for periodic reversal of flow of feed stream. Another important feature of the system is that with changing feed flow direction, the permeate flow direction is also changed to maintain countercurrent feed and permeate flows for enhanced mass transfer driving force (concentration difference).Three feed solutions (Bovine serum albumin (BSA), apple juice and citrus fruit pectin) were studied in crossflow membrane filtration. These solutes are well-known in membrane filtration for their fouling and concentration polarization potentials. Laboratory-scale tests on a hollow-fiber ultrafiltration membrane module using each of the feed solutes show that under flow reversal conditions, the permeate flux is significantly enhanced when compared with the conventional unidirectional flow. The flux enhancement is dramatic (by an order of magnitude) with increased feed concentration and operating transmembrane pressure. Thus, flow reversal technology seems an attractive alternative to mitigate fouling problem in crossflow membrane filtration.iv

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Membrane fouling: a challenge during dairy ultrafiltration

Kanani

2015

Membrane Processing for Dairy Ingredient Separation

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Overview of concentration polarization in ultrafiltration

Cited by 24 publications

References 22 publications

Concentration polarisation in tubular membranes —a numerical approach

Concentration polarisation in tubular membranes —a numerical approach

Flux Enhancement in Crossflow Membrane Filtration: Fouling and It's Minimization by Flow Reversal

Membrane fouling: a challenge during dairy ultrafiltration

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