Next Article in Journal
Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications
Previous Article in Journal
A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue
Previous Article in Special Issue
Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment
Open AccessFeature PaperArticle

Systematic Study of the Impact of Pulsed Electric Field Parameters (Pulse/Pause Duration and Frequency) on ED Performances during Acid Whey Treatment

1
Institute of Nutrition and Functional Foods (INAF), Dairy Science and Technology Research Center (STELA) and Department of Food Sciences, Université Laval, Québec, QC G1V 0A6, Canada
2
Laboratoire de Transformation Alimentaire et Procédés ÉlectroMembranaires (LTAPEM, Laboratory of Food Processing and ElectroMembrane Processes), Université Laval, Québec, QC G1V 0A6, Canada
3
Parmalat, Victoriaville, Québec, QC G6P 9V7, Canada
*
Author to whom correspondence should be addressed.
Membranes 2020, 10(1), 14; https://doi.org/10.3390/membranes10010014
Received: 16 December 2019 / Revised: 29 December 2019 / Accepted: 2 January 2020 / Published: 11 January 2020
(This article belongs to the Special Issue Ion-Exchange Membranes and Processes)
Processing acid whey is still a challenge for the dairy industry due to its high lactic acid and mineral contents. Their removal processes represent a high investment and running cost in addition to significant production of polluting effluents. A previous study showed that the use of electrodialysis with the application of pulsed electric fields (PEFs) was sufficiently efficient to produce dryable acid whey with reduced scaling issues during the process. In the present work, eight PEF conditions using different pulse/pause durations and frequencies were tested for 1) process optimization and 2) understanding of the underlying mechanisms involved in PEF process improvements. Best results were obtained for PEF conditions (5 s/5 s) and (15 s/15 s) with almost complete scaling mitigation and minimal energy consumption (5.3 ± 0.4 Wh/g of lactic acid vs. 9.33 ± 1.38 Wh/g for continuous current). Longer pause times also led to better divalent ion demineralization at the expense of sodium elimination induced by stronger affinity with the membrane and longer retention times. For the first time, PEF parameters of relatively low frequencies (<1) were studied in sub-limiting current conditions on a complex solution such as acid whey. View Full-Text
Keywords: electrodialysis; pulsed electric fields; scaling; acid whey; demineralisation; lactic acid removal electrodialysis; pulsed electric fields; scaling; acid whey; demineralisation; lactic acid removal
Show Figures

Graphical abstract

MDPI and ACS Style

Dufton, G.; Mikhaylin, S.; Gaaloul, S.; Bazinet, L. Systematic Study of the Impact of Pulsed Electric Field Parameters (Pulse/Pause Duration and Frequency) on ED Performances during Acid Whey Treatment. Membranes 2020, 10, 14.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop