RT info:eu-repo/semantics/article
T1 Subcritical Water as Pretreatment Technique for Bioethanol Production from Brewer’s Spent Grain within a Biorefinery Concept
A1 Alonso Riaño, Patricia
A1 Amândio, Mariana S.T.
A1 Xavier, Ana María Rebelo Barreto
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
K1 Subcritical water pretreatment
K1 Brewer's spent grain
K1 Lignocellulosic biomass
K1 High solids' loading
K1 Simultaneous saccharification and fermentation
K1 Separate hydrolysis and fermentation
K1 Ingeniería química
K1 Chemical engineering
AB Bioeconomy and environmental issues envisage industrial by-products such as Brewer’sspent grain (BSG) as renewable resources for their recycling and reuse within a biorefinery concept.This study aimed to investigate the production of bioethanol from subcritical water (subW) pretreatedBSG, following the conversion of the BSG biopolymers cellulose and hemicelluloses. The subWpretreatment was performed in a batch reactor at 174 ◦C, during 60 min and 5% (w/v) of dry BSGcharge. The behavior of BSG biopolymers under subW pretreatment was monitored by evaluatingthe chemical composition of the liquid and solid streams and the chemical and structural changescaused in the solid residues by scanning electron microscope (SEM), CHNS elemental analysisand water retention value (WRV). The production of bioethanol from subW-pretreated BSG wasassessed by separate hydrolysis and fermentation (SHF) and also by simultaneous saccharificationand fermentation (SSF) by using the enzymatic cocktail Celluclast 1.5 L (40 FPU/gsolids) and the yeastEthanol Red®. The higher bioethanol productivity (1.073 g·L−1·h−1) and concentration (32.18 g/L)were achieved by SSF with higher solids’ loading (25%) and following a fed-batch strategy. Theseresults suggest that subcritical water pretreatment is a promising technology for the valorization ofBSG as a feedstock for second-generation bioethanol production.
PB MDPI
YR 2022
FD 2022-11
LK http://hdl.handle.net/10259/7526
UL http://hdl.handle.net/10259/7526
LA eng
NO This work was supported by the Agencia Estatal de Investigación (ES) [grant numbers PID2019–104950RB-I00/AEI/10.13039/501100011033, TED2021–129311B-I00 and PDC2022–133443-I00] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant number BU050P20]. The P. Alonso-Riaño predoctoral contract was funded by JCyL and the European Social Fund (ESF) by ORDEN EDU/556/2019, de 5 de junio. This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials (PT), UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC).
DS Repositorio Institucional de la Universidad de Burgos
RD 04-may-2024