Abstract
Membrane technology is an interesting alternative to conventional gelatin clarification methods, resulting in the elimination of refining chemical agents. In this work, the application of a permanent magnetic field as a pre-treatment of the gelatin solutions was proposed as a strategy to improve the microfiltration (MF) performance. Filtration tests were performed using a 1.5% swine gelatin solution at 40 °C through cellulose acetate membranes in a tangential flow module. Prior to the filtrations, the feed solutions were pretreated by the circulation of the solution through magnetic fields with different flux densities, 0.7 T and 1.34 T, for 2 h. The magnetic induction of the solution significantly increased the permeate flux and the recovery of hydraulic permeance by 63% and 122%, respectively, showing the application of the magnetic field in the solution of gelatin is an attractive alternative to improve the performance of the process.
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Acknowledgements
The authors thank CNPq (552185/2011-6, 477497/2013-6, 307512/2015-0) and CAPES (PROEX) for financial support and scholarships. The company Gelnex is acknowledged for supplying gelatin samples. Control Process Laboratory (LCP/UFSC) and Multi-user Analytical Laboratory (CA-EQA/UFSC) are acknowledged for zeta potential analyses. Prof. Jader Riso Barbosa Jr. is acknowledged for kindly providing the Halbach array.
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Bretanha, C.C., Zin, G., Oliveira, J.V. et al. Improvement of tangential microfiltration of gelatin solution using a permanent magnetic field. J Food Sci Technol 58, 1093–1100 (2021). https://doi.org/10.1007/s13197-020-04623-y
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DOI: https://doi.org/10.1007/s13197-020-04623-y