Because the flow resistance increases with decreasing particle size, the mechanical dewatering of fine particle suspensions is time-consuming. The electrofiltration potential increases with the particle surface area. In this way the combination of mechanical and electrical filtration seems to be an effective method to …

Electrofiltration experiments using both buffered and unbuffered quartz suspensions revealed the importance of electrochemical effects and the migration of hydroxide ions and especially protons ...

Hofmann and Posten (2003) developed an electrofiltration concept especially for the application to biological systems such as biopolymers. They used a two-sided filtration device with flushed electrodes. ... Modelling two-sided electrofiltration of quartz suspensions: importance of electrochemical reactions. Chem. Eng. Sci. (2005) …

INTRODUCTION TO MEMBRANE SEPARATIONS. K. Scott, in Handbook of Industrial Membranes (Second Edition), 1995 Electrofiltration. Electrofiltration is membrane separation driven by the application of a differential pressure and an electrical potential gradient across the membrane. This potential facilitates the transport of mobile ions and …

DOI: 10.1016/J.CES.2005.05.058 Corpus ID: 93144772; Modelling two-sided electrofiltration of quartz suspensions: Importance of electrochemical reactions …

Similar observed behavior during electrofiltration has been reported in literature for different types of suspensions [38,50,61,66]. The total quantity of filtrate obtained after 150 min of electrofiltration (EF-total) was higher (141.52 ± 6.09 mL) than that obtained by pressure filtration (F-total) (111.84 ± 10.18 mL).

Saveyn, Hans, Paul Van der Meeren, R HOFMANN, and W STAHL. 2005. "Modelling Two-Sided Electrofiltration of Quartz Suspensions: Importance of Electrochemical Reactions." In Proceedings of the FILTECH 2005 Conference, Wiesbaden, Germany. Vol I, 266–274.

Modelling two-sided electrofiltration of quartz suspensions: importance of electrochemcial reactions Saveyn, H. ; Meeren, P. v. d. ; Hofmann, R. ; Stahl, Werner …

Electrofiltration utilises the charge of particle surfaces to improve the filtration operation. In an electric field colloidal particles move through electrophoresis, thereby influencing (in this case) the growth of the filter cake (Moulik, 1971). ... Modelling two-sided electrofiltration of quartz suspensions: importance of electrochemical ...

In the past, various laboratory-scale research results have shown that electrofiltration greatly enhanced the filtration of aqueous suspensions of anatase [1], quartz sand [2], and kaolin [3]. A similar finding was also obtained in a pilot- scale electrofiltration of SiO 2 using a polyamide membrane with a 0.2-mm pore size [4].

Electrofiltration of Aqueous Suspensions. September 2000; Journal of Colloid and ... the effect of electric fields applied to a quartz sand bed on electrokinetics and the disinfection performance ...

B10.1 A statement on your most significant contributions to this research field Posten, C. Prof Posten's area of expertise is in photobioreactor design for the optimal production of photosynthetic green algae, purple bacteria and mosses.

The electrofiltration performance of non-circular ceramic membranes using whey suspensions is investigated and appraised with reference to (i) permeate flux and (ii) whey removals.

Filtration combined with an electric field (electrofiltration) enhances the filtration kinetics of aqueous suspensions. Although electrophoresis and electroosmosis largely contribute to electrofiltration behavior, side effects such as water ... quartz sand (Weber and Stahl, 2002), calcium carbonate A DC electric field can also increase the ...

The manufacture of Gr/PAN conductive membranes with superior electrofiltration capabilities is made safe and efficient by the concepts and evidence presented in this work. ... /PPy and the Membrane Antifouling Property in Filtrating Yeast Suspensions in EMBR. Procedia Eng. (2012) Y. Li et al. Performance of carbon fiber …

Another attempt of viability of electrofiltration (fiber filter under 80 V of electrical field) on buffered quartz suspensions (10% v/v, and particle diameter of 2 …

Electrofiltration experiments using both buffered and unbuffered quartz suspensions revealed the importance of electrochemical effects and the migration of …

A theoretical analysis based on integral method for quantification of the permeate flux and mass transfer coefficient in gel layer controlled electric…

Methodology. Laboratory Techniques and Procedures. Filtration. Improvement of Filtration Kinetics by Pressure Electrofiltration. DOI: 10.1016/S1383-5866 (01)00118 …

Electrofiltration experiments using both buffered and unbuffered quartz suspensions revealed the importance of electrochemical effects and the migration of hydroxide ions and especially protons into the filter chamber, altering the cake surface properties and even influencing the suspension particle flocculation state and as such the cake ...

In the past, various laboratory-scale research results have shown that electrofiltration greatly enhanced the filtration of aqueous suspensions of anatase [1], quartz sand [2], and kaolin [3]. A ...

Electrofiltration experiments using both buffered and unbuffered quartz suspensions revealed the importance of electrochemical effects and the migration of …

The model successfully represented electrofiltration data obtained from kaolin suspensions with a laboratory horizontal filter. Electrolytic gas contributed to an increase of 13% in electrofiltration rate. ... kaolin (Vorobiev and Jany, 1999 ), quartz sand (Weber and Stahl, 2002 ), calcium carbonate (Yukawa et al., 1976 ), and for biological ...

Electrofiltration experiments using both buffered and unbuffered quartz suspensions revealed the importance of electrochemical effects and the migration of hydroxide ions and especially protons ...

The relation of applied pressure-height of piston during pressure filtration was measured for aqueous 7 vol.% suspensions of positively charged 150 nm alumina particles at 0.2 mm/min of crosshead speed of piston.The dispersed suspension changed to a flocculated suspension at a critical applied pressure (phase transition pressure, ΔP tc), …

Zugehörige Institution(en) am KIT: Institut für Mechanische Verfahrenstechnik und Mechanik (MVM) Publikationstyp: Buchaufsatz: Publikationsjahr: 2005

ABSTRACT An attempt is made to elucidate the electrochemical aspects of the electroosmotic dewatering (EOD) of clays as reported in some recent work, especially that on interrupted DC power electroosmotic dewatering published by Rabie, Mujumdar and Weber (2). These authors showed that the dewatering by EOD stops after the DC power …

Saveyn H, Van der Meeren P, HOFMANN R, STAHL W. Modelling two-sided electrofiltration of quartz suspensions: importance of electrochemical reactions. In: …

Filtration under constant D. C. electric field with constant hydraulic pressure, what is termed electrokinetic filtration, was discussed in this paper. Under these conditions it is considered that electrophoresis occurs in the slurry and causes less cake formation, and that electroosmosis occurs at the same time in the filter cake. Therefore, the flow rate of …

Modelling two-sided electrofiltration of quartz suspensions: importance of electrochemical reactions. Chem. Eng. Sci. (2005) ... usually to get the right suspensions properties and right separator configuration in order to minimize the energy consumption and hence reduce the generator size and treatment cost. This chapter introduces ...