Effect of pulsed electric field on electrodialysis of a NaCl solution in sub-limiting current regime

2015 ◽  
Vol 164 ◽  
pp. 267-280 ◽  
Author(s):  
P. Sistat ◽  
P. Huguet ◽  
B. Ruiz ◽  
G. Pourcelly ◽  
S.A. Mareev ◽  
...  
Keyword(s):  
Electric Field ◽  
Pulsed Electric Field ◽  
Limiting Current ◽  
Nacl Solution ◽  
Current Regime

scholarly journals Positive Impact of Pulsed Electric Field on Lactic Acid Removal, Demineralization and Membrane Scaling during Acid Whey Electrodialysis

2019 ◽  
Vol 20 (4) ◽  
pp. 797 ◽  
Author(s):  
Guillaume Dufton ◽  
Sergey Mikhaylin ◽  
Sami Gaaloul ◽  
Laurent Bazinet
Keyword(s):  
Lactic Acid ◽  
Electric Field ◽  
Positive Impact ◽  
Pulsed Electric Field ◽  
Relative Energy ◽  
Limiting Current ◽  
Membrane Scaling ◽  
Acid Whey ◽  
Dc Current ◽  
First Time

The drying of acid whey is hindered by its high mineral and organic acid contents, and their removal is performed industrially through expensive and environmentally impacting serial processes. Previous works demonstrated the ability to remove these elements by electrodialysis alone but with a major concern—membrane scaling. In this study, two conditions of pulsed electric field (PEF) were tested and compared to conventional DC current condition to evaluate the potential of PEF to mitigate membrane scaling and to affect lactic acid and salt removals. The application of a PEF 25 s/25 s pulse/pause combination at an initial under-limiting current density allowed for decreasing the amount of scaling, the final system electrical resistance by 32%, and the relative energy consumption up to 33%. The use of pulsed current also enabled better lactic acid removal than the DC condition by 10% and 16% for PEF 50 s/10 s and 25 s/25 s, respectively. These results would be due to two mechanisms: (1) the mitigation of concentration polarization phenomenon and (2) the rinsing of the membranes during the pause periods. To the best of our knowledge, this was the first time that PEF current conditions were used on acid whey to both demineralize and deacidify it.

scholarly journals Effect of Surface Inhomogeneity of Ion-Exchange Membranes on the Mass Transfer Efficiency in Pulsed Electric Field Modes

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 40 ◽  
Author(s):  
Dmitrii Butylskii ◽  
Ilya Moroz ◽  
Kseniya Tsygurina ◽  
Semyon Mareev
Keyword(s):  
Mass Transfer ◽  
Ion Exchange ◽  
Electric Field ◽  
Membrane Separation ◽  
Rapid Development ◽  
Concentration Field ◽  
Pulsed Electric Field ◽  
Limiting Current ◽  
Ion Exchange Membranes ◽  
Low Frequencies

Despite the growing interest in pulsed electric field modes in membrane separation processes, there are currently not many works devoted to studying the effect of the surface properties and composition of ion-exchange membranes on their efficiency in these modes. In this paper, we have shown the effect of increasing mass transfer using different kinds of ion-exchange membranes (heterogeneous and homogeneous with smooth, undulated, and rough surfaces) during electrodialysis in the pulsed electric field modes at underlimiting and overlimiting currents. It was found that the maximum increment in the average current is achieved when the average potential corresponds to the right-hand edge of the limiting current plateau of the voltammetric curve, i.e., at the maximum resistance of the system in the DC mode. For the first time, the development of electroconvective vortices was visualized in pulsed electric field modes and it was experimentally shown that even at relatively low frequencies, a non-uniform concentration field is preserved at the time of a pause, which stimulates the rapid development of electroconvection when pulses are switched on again. In the case of relatively high pulse frequencies, the electroconvective vortices formed during a pulse lapse do not completely decay during a pause; they only slightly decrease in size.

Influence of Pulse Width on Polyphenol Extraction from Agricultural Products by Pulsed Electric Field

2013 ◽  
Vol 133 (2) ◽  
pp. 32-37 ◽  
Author(s):  
Akira Nakagawa ◽  
Hitoshi Hatayama ◽  
Koichi Takaki ◽  
Shoji Koide ◽  
Yukio Kawamura
Keyword(s):  
Electric Field ◽  
Pulse Width ◽  
Pulsed Electric Field ◽  
Agricultural Products ◽  
Polyphenol Extraction

Development of PEF extraction technology by Maguin

2015 ◽  
pp. 758-760
Author(s):  
Romain Delecourt ◽  
Loïc Marsal
Keyword(s):  
Sugar Beet ◽  
Electric Field ◽  
Pulsed Electric Field ◽  
Extraction Technology ◽  
Application System ◽  
Wide Range ◽  
Type Machine

Maguin (France) is still active in the application of pulsed electric field (PEF) technology. After having carried out successful tests on a 10 t/h pilot screw-type machine on sugar beet cossettes, a new application system based on a roller technology has been developed. This technology allows a wide range of application due to its flexibility with flowrates and materials. A variety of process schemes are proposed to ensure the best performance of the PEF technology.

Effect of pulsed electric field on properties and multi-scale structure of japonica rice starch

LWT ◽  
2019 ◽  
Vol 116 ◽  
pp. 108515 ◽  
Author(s):  
Chunsen Wu ◽  
Qiu-Yan Wu ◽  
Mangang Wu ◽  
Wei Jiang ◽  
Jian-Ya Qian ◽  
...  
Keyword(s):  
Electric Field ◽  
Pulsed Electric Field ◽  
Scale Structure ◽  
Rice Starch ◽  
Japonica Rice ◽  
Multi Scale
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