Biorefinery of brewery spent grain to obtain bioproducts with high value-added in the market.

Autor: Outeiriño D; Industrial Biotechnology and Environmental Engineering Group 'BiotecnIA', Chemical Engineering Department, University of Vigo (Campus Ourense), 32004 Ourense, Spain., Costa-Trigo I; Industrial Biotechnology and Environmental Engineering Group 'BiotecnIA', Chemical Engineering Department, University of Vigo (Campus Ourense), 32004 Ourense, Spain., Ochogavias A; Industrial Biotechnology and Environmental Engineering Group 'BiotecnIA', Chemical Engineering Department, University of Vigo (Campus Ourense), 32004 Ourense, Spain., Pinheiro de Souza Oliveira R; Biochemical and Pharmaceutical Technology Department, Faculty of Pharmaceutical Sciences, São Paulo University, Av. Prof Lineu Prestes, 580, Bl 16, São Paulo 05508-900, Brazil., Pérez Guerra N; Department of Analytical and Food Chemistry, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, Spain., Salgado JM; Industrial Biotechnology and Environmental Engineering Group 'BiotecnIA', Chemical Engineering Department, University of Vigo (Campus Ourense), 32004 Ourense, Spain., Domínguez JM; Industrial Biotechnology and Environmental Engineering Group 'BiotecnIA', Chemical Engineering Department, University of Vigo (Campus Ourense), 32004 Ourense, Spain. Electronic address: jmanuel@uvigo.es.
Jazyk: angličtina
Zdroj: New biotechnology [N Biotechnol] 2024 Mar 25; Vol. 79, pp. 111-119. Date of Electronic Publication: 2023 Dec 28.
DOI: 10.1016/j.nbt.2023.12.010
Abstrakt: The brewery industry is under economic and environmental pressure to minimize residual management costs, particularly brewery spent grain (BSG), which accounts for 80-85% (w/w) of the total by-products generated. BSG is a lignocellulosic material primarily composed of carbohydrates, proteins and lipids. Developing a biorefinery model for conversion of BSG into value-added products is a plausible idea. Previous work optimized the pretreatment of BSG with the ionic liquid [N 1112OH ][Gly] and further release of fermentable sugar-containing solutions by enzymatic hydrolysis, using an enzymatic cocktail obtained by solid-state fermentation of BSG with Aspergillus brasiliensis CECT 2700 and Trichoderma reesei CECT 2414. The current work ends the biorefinery process, studying the fermentation of these culture media with two LAB strains, Lactobacillus pentosus CECT 4023 and Lactobacillus plantarum CECT 221, from which the production of organic acids, bacteriocins, and microbial biosurfactants (mBS) was obtained. In addition to the bacteriocin activity observed, a mass balance of the whole biorefinery process quantified the production of 106.4 g lactic acid and 6.76 g mBS with L. plantarum and 116.1 g lactic acid and 4.65 g mBS with L. pentosus from 1 kg of dry BSG. Thus, BSG shows a great potential for waste valorization, playing a major role in the implementation of biomass biorefineries in circular bioeconomy.
Competing Interests: Declaration of Competing Interest Authors declare that they have no conflict of interest.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
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