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Article

Ion-Exchange Technology for Lactic Acid Recovery in Downstream Processing: Equilibrium and Kinetic Parameters

by 1,2,3,*,†, 1,2,†, 1,2 and 1,2,4
1
Chemical Engineering Department, Escola d’Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya (UPC)-BarcelonaTECH, C/Eduard Maristany 10-14, Campus Diagonal-Besòs, 08930 Barcelona, Spain
2
Barcelona Research Center for Multiscale Science and Engineering, Campus Diagonal-Besòs, 08930 Barcelona, Spain
3
Chemical Engineering Department, School of Industrial Engineering—CINTECX, University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo, Spain
4
Water Technology Center (CETAQUA), Carretera d’Esplugues, 75, 08940 Cornellà de Llobregat, Spain
*
Author to whom correspondence should be addressed.
These authors contributed equally to the work.
Academic Editors: Goen Ho and Alexandra B. Ribeiro
Water 2021, 13(11), 1572; https://doi.org/10.3390/w13111572
Received: 7 April 2021 / Revised: 18 May 2021 / Accepted: 31 May 2021 / Published: 2 June 2021
The downstream processing for the separation and purification of lactic acid is a hot research area in the bio-refinery field due to its continuous growing market in different sectors, such as the food, cosmetic and pharmaceutical sectors. In this work, the use of ion-exchange technology for lactic acid recovery is proposed. For that, four anion exchange resins with different polymer structures and functional groups were tested (A100, MN100, A200E and MP64). The sorption process was optimized by the Box–Behnken factorial design, and the experimental data obtained in the sorption process were analyzed by using the response surface methodology and fitted at different isotherms and kinetics models. Moreover, regenerant type, contact time and solid/liquid ratio were evaluated in the desorption process. Results showed that the best resin for lactic acid removal was A100, at pH = 4, with a resin/lactic acid solution ratio of 0.15 g/mL during a maximum of 1 h, achieving 85% of lactic acid removal. Moreover, equilibrium data sorption of lactic acid onto A100 resin was fitted by a Langmuir isotherm and by a kinetic model of a pseudo-second order. In addition, in the desorption process, it was stablished that a resin/regenerant ratio of 0.15 g/mL during 30 min with 0.1 M of NaOH solution provided the best results (4.45 ± 0.08 mg/g). View Full-Text
Keywords: organic acid; circular economy; optimization process; bio-economy; response surface methodology organic acid; circular economy; optimization process; bio-economy; response surface methodology
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MDPI and ACS Style

Vecino, X.; Reig, M.; Valderrama, C.; Cortina, J.L. Ion-Exchange Technology for Lactic Acid Recovery in Downstream Processing: Equilibrium and Kinetic Parameters. Water 2021, 13, 1572. https://doi.org/10.3390/w13111572

AMA Style

Vecino X, Reig M, Valderrama C, Cortina JL. Ion-Exchange Technology for Lactic Acid Recovery in Downstream Processing: Equilibrium and Kinetic Parameters. Water. 2021; 13(11):1572. https://doi.org/10.3390/w13111572

Chicago/Turabian Style

Vecino, X., M. Reig, C. Valderrama, and J. L. Cortina 2021. "Ion-Exchange Technology for Lactic Acid Recovery in Downstream Processing: Equilibrium and Kinetic Parameters" Water 13, no. 11: 1572. https://doi.org/10.3390/w13111572

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