Determination of cake thickness and porosity during cross-flow ultrafiltration on a plane ceramic membrane surface using an electrochemical method

The thickness and the porosity of a deposit during ultrafiltration experiments are determined using an electrochemical method. Twenty microelectrodes are mounted flush to a ceramic plane membrane and maps of deposit thickness are determined for three inlet/outlet distributors configurations. Combining an electrochemical method and a step transient method, the determination of the thickness and the porosity of a particles deposit is performed. These local thickness and porosity values are analyzed thanks to wall shear stress local measurements obtained in a previous work [Sep. Sci. Technol. 37 (10) (2002) 2251]. The results emphasize the heterogeneity of the deposit thickness, especially in zones of low wall shear stress. Furthermore, the porosity values of the deposit are ranged between 0.3 and 0.8 as a function of the location at the membrane surface.

[1]  C. Ross Ethier,et al.  Concentration and concentration gradient measurements in an ultrafiltration concentration polarization layer. Part I : A laser-based refractometric experimental technique , 1997 .

[2]  Jacques Comiti,et al.  A new model for determining mean structure parameters of fixed beds from pressure drop measurements: application to beds packed with parallelepipedal particles , 1989 .

[3]  O. Wein,et al.  Calibration of electrodiffusion friction probes using a voltage-step transient , 1998 .

[4]  Hans G.L. Coster,et al.  Direct observation of particle deposition on the membrane surface during crossflow microfiltration , 1998 .

[5]  Robert H. Davis.  Modeling of Fouling of Crossflow Microfiltration Membranes , 1992 .

[6]  Mark R. Wiesner,et al.  Evaluation of crossflow filtration models based on shear-induced diffusion and particle adhesion: Complications induced by feed suspension polydispersivity , 1998 .

[7]  M. Mackley,et al.  Cross-flow cake filtration mechanisms and kinetics , 1992 .

[8]  R. Kuboi,et al.  Aqueous two-phase extraction of dehydrogenases using triazine dyes in PEG/phosphate systems , 1992 .

[9]  Mark M. Clark,et al.  Modeling of flux decline during crossflow ultrafiltration of colloidal suspensions , 1998 .

[10]  Siegfried Ripperger,et al.  Particle deposition and layer formation at the crossflow microfiltration , 1997 .

[11]  Robert H. Davis,et al.  Experimental verification of the shear-induced hydrodynamic diffusion model of crossflow microfiltration , 1991 .

[12]  G. Rius,et al.  Characterization of calcareous deposits in artificial sea water by impedance techniques—I. Deposit of CaCO3 without Mg(OH)2 , 1998 .

[13]  B. Tribollet,et al.  Transient Mass Transfer at a Coated Rotating Disk Electrode Diffusion and Electrohydrodynamical Impedances , 1987 .

[14]  G. Daufin,et al.  Skimmilk crossflow microfiltration performance versus permeation flux to wall shear stress ratio , 1996 .

[15]  B. Tribollet,et al.  EHD and steady state measurements for characterization of transport properties in a gel layer , 1996 .

[16]  Thomas J. Hanratty,et al.  An experimental study of the unsteady nature of the viscous sublayer , 1963 .

[17]  Pascal Jaouen,et al.  Hydrodynamics study in a plane ultrafiltration module using an electrochemical method and particle image velocimetry visualization , 2002 .

[18]  Pascal Jaouen,et al.  Suction effect on the shear stress at a plane ultrafiltration ceramic membrane surface , 2002 .

[19]  Martine Mietton-Peuchot,et al.  Cake Thickness Measurement with an Optical Laser Sensor , 2001 .

[20]  S. Nakao,et al.  Three-dimensional simulation of random packing and pore blocking phenomena during microfiltration , 1995 .

[21]  C. Moresoli,et al.  Experimental verification of the shear-induced hydrodynamic diffusion model of crossflow microfiltration, with consideration of the transmembrane pressure axial variation , 2000 .

[22]  G. Gésan-Guiziou,et al.  Wall shear stress: effective parameter for the characterisation of the cross-flow transport in turbulent regime during skimmed milk microfiltration , 1999 .

[23]  B. Tribollet,et al.  Characterization of calcareous deposits in artificial seawater by impedance techniques: 3—Deposit of CaCO3 in the presence of Mg(II) , 2003 .

[24]  Andrew L. Zydney,et al.  Microfiltration and Ultrafiltration: Principles and Applications , 1996 .

[25]  J S Jurvelin,et al.  Comparison of optical, needle probe and ultrasonic techniques for the measurement of articular cartilage thickness. , 1995, Journal of biomechanics.

[26]  A. West.  Comparison of Modeling Approaches for a Porous Salt Film , 1993 .