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Article

Evaluation of Calcium Alginate-Based Biopolymers as Potential Component of Membranes for Recovering Biosurfactants from Corn Steep Water

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Chemical Engineering Department, Campus As Lagoas-Marcosende, School of Industrial Engineering—CINTECX, University of Vigo, 36310 Vigo, Spain
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Barcelona Research Center for Multiscale Science and Engineering, Chemical Engineering Department, Campus Diagonal-Besòs, Escola d’Enginyeria de Barcelona Est, Universitat Politècnica de Catalunya, 08930 Barcelona, Spain
3
CETaqua, Carretera d’Esplugues 75, 08940 Cornellà de Llobregat, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Zuorro
Water 2021, 13(17), 2396; https://doi.org/10.3390/w13172396
Received: 10 August 2021 / Revised: 27 August 2021 / Accepted: 30 August 2021 / Published: 31 August 2021
Corn steep water (CSW) is a complex agro-food stream that is used as a source of cost-competitive biosurfactants, since they are produced spontaneously in the steeping process of corn, avoiding production costs. Nevertheless, the extraction of biosurfactants from CSW using sustainable processes is still a challenge. Consequently, the use of calcium alginate membranes could present a novel and sustainable technology for recovering biosurfactants from aqueous streams. Therefore, the aim of this work is to evaluate calcium alginate-based biopolymers, without and with the presence of grape marc as an additive, as a key component of membranes for the recovery of biosurfactants in corn steep water. Biosurfactants are present in CSW, together with other inorganic solutes and biomolecules, such as organic acids, sugars, cations, anions as well as metals. Hence, the competition of these mentioned compounds for the active sites of the calcium alginate-based biopolymers was high. However, they showed a good adsorption capacity for biosurfactants, recovering around 55 ± 2% and 47 ± 1%, of biosurfactants from CSW using both calcium alginate-based biopolymers, with and without biodegraded grape marc. Regarding adsorption capacity, it was 54.8 ± 0.6 mg biosurfactant/g bioadsorbent for the biopolymer containing grape marc, and 46.8 ± 0.4 mg biosurfactant/g bioadsorbent for the calcium alginate-based biopolymer alone. Based on these results, it could be postulated that the formulation of green membranes, based on calcium alginate-based polymers, could be an interesting alternative for the recovery of biosurfactants from aqueous streams including CSW. View Full-Text
Keywords: corn stream; surface-active compounds; eco-adsorbents; green membranes; resource recovery corn stream; surface-active compounds; eco-adsorbents; green membranes; resource recovery
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MDPI and ACS Style

Martínez-Arcos, A.; Reig, M.; Cruz, J.M.; Cortina, J.L.; Moldes, A.B.; Vecino, X. Evaluation of Calcium Alginate-Based Biopolymers as Potential Component of Membranes for Recovering Biosurfactants from Corn Steep Water. Water 2021, 13, 2396. https://doi.org/10.3390/w13172396

AMA Style

Martínez-Arcos A, Reig M, Cruz JM, Cortina JL, Moldes AB, Vecino X. Evaluation of Calcium Alginate-Based Biopolymers as Potential Component of Membranes for Recovering Biosurfactants from Corn Steep Water. Water. 2021; 13(17):2396. https://doi.org/10.3390/w13172396

Chicago/Turabian Style

Martínez-Arcos, Andrea, Mònica Reig, José M. Cruz, José L. Cortina, Ana B. Moldes, and Xanel Vecino. 2021. "Evaluation of Calcium Alginate-Based Biopolymers as Potential Component of Membranes for Recovering Biosurfactants from Corn Steep Water" Water 13, no. 17: 2396. https://doi.org/10.3390/w13172396

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