Critical stability conditions in crossflow microfiltration of skimmed milk: transition to irreversible deposition

Gésan-Guiziou, Geneviève; Boyaval, E.; Daufin, G.

doi:10.1016/s0376-7388(99)00017-4

Cited by 123 publications

(108 citation statements)

References 24 publications

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“…The resistance-in-series model has been used to evaluate fouling in the membrane separation process (Blanpain and Lalande, 1997;Gésan-Guisiou, 1999;Merin and Shomer, 1999;Choi et al, 2005;Timmer et al, 1997;Chang and Kim, 2005;Huisman et al, 1998). According to Darcy's Law:…”

Section: Resistance-in-series Analysismentioning

confidence: 99%

“…R m is the hydraulic resistance of the clean membrane; the additional resistance is separated into two parts: R ir , the fouling hydraulic resistance (fouling is defined as irreversible deposition onto the membrane surface or in the membrane matrix, such as adsorption, internal pore blocking); and R r is the hydraulic resistance due to reversible phenomena (concentration polarization and/or reversible deposit) (Gésan-Guisiou, 1999). R m and R ir were calculated from the pure water permeate flux.…”

Section: Resistance-in-series Analysismentioning

confidence: 99%

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Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration

Brião

Tavares

2012

Braz. J. Chem. Eng.

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-This paper evaluates the pore blocking mechanism of two ultrafiltration membranes with different geometries (tubular and spiral wound) when dairy wash water is filtered. The work evaluated the effect of transmembrane pressure and the cross-flow velocity with a 3 2 experimental design using classical Hermia's models and the resistance-in-series model. The resistance-in-series analysis identified external fouling on the surface of both membranes, but the tubular membrane showed higher reversible fouling, while the reversible and irreversible resistances of the spiral wound membrane averaged 41% and 45%, respectively. Cake formation is the model that best represents ultrafiltration in the spiral wound membrane at all transmembrane pressures and cross-flow velocities. In the tubular membrane, at the lowest cross-flow velocity (0.79 m.s -1 ), the cake formation model fitted the experimental data best. However, at higher cross-flow velocities (1.42 and 2.23 m.s -1 ), the best fit of flux data was obtained with the complete pore blocking model. In addition, the tubular membrane apparently had a two-step pore blocking: "pore blocking" as the initial governing mechanism followed by "cake formation".

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Section: Resistance-in-series Analysismentioning

confidence: 99%

Section: Resistance-in-series Analysismentioning

confidence: 99%

Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration

Brião

Tavares

2012

Braz. J. Chem. Eng.

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“…The relation between wall shear stress, τ w , and the Fanning friction factor, f, and the approximation of Blasius in turbulent flow, assuming the membrane to be a smooth tubular element, enable τ w to be calculated from the Reynolds number, Re, in the manner used by Gésan-Guiziou et al (6,8).…”

Section: Determination Of Shear Stress At the Membrane Wall And Critimentioning

confidence: 99%

“…This critical erosion shear stress was defined as the shear stress that must be exceeded before surface erosion of the deposit takes place and applied to critical flux microfiltration by Gésan-Guiziou et al (6). An efficient wall shear stress, τ weff , and the critical erosion shear stress, τ wc0 , are related to the wall shear stress as described by equation (3),…”

Section: Determination Of Shear Stress At the Membrane Wall And Critimentioning

confidence: 99%

“…Various theoretical and experimental works have led to the conclusion that there is a critical permeation flux, J crit , below which there is no marked fouling and above which foulants start to deposit, altering the filtration performance (5)(6)(7). J crit can be determined by successive variations of trans-membrane pressure, TMP (7)(8)(9); this step by step technique has been used in the current work.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Flocculation on Critical Flux during Crossflow Microfiltration of Bentonite Suspensions

Chellappah

Tarleton

Wakeman

2008

Separation Science and Technology

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The effectiveness of polymeric flocculant addition and hydrodynamics on increasing the critical permeation flux, J crit , during crossflow microfiltration of bentonite suspensions using a tubular ceramic membrane module was investigated. The investigation determined the effects of flocculant concentration on J crit at various crossflow velocities. The best filtration performance (highest J crit ) was obtained at a flocculant dose of 500 mg kg -1 (mg of flocculant per kg of solids) and at a crossflow velocity of 1.71 m s -1. Particle size has been used as a parameter to fit the shear-induced hydrodynamic diffusion model to the experimental filtration data.

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Concentrated Milk and Powders

Gésan-Guiziou

2012

Membrane Processing

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Critical stability conditions in crossflow microfiltration of skimmed milk: transition to irreversible deposition

Cited by 123 publications

References 24 publications

Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration

Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration

Effect of Flocculation on Critical Flux during Crossflow Microfiltration of Bentonite Suspensions

Concentrated Milk and Powders

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