2024-03-29T13:48:33Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/470632021-06-27T18:34:32Zcom_10324_35294com_10324_952com_10324_894col_10324_35295
A biorefinery based on brewer`s spent grains: Arabinoxylans recovery by microwave assisted pretreatment integrated with butanol production
López Linares, Juan Carlos
Lucas Yagüe, Susana
García Cubero, María Teresa
Jiménez Sevilla, Juan José
Coca Sanz, Mónica
Producción Científica
This study proposes an integrated biorefinery of brewer's spent grain (BSG) based on the application of a microwave pretreatment to obtain bioproducts, such as arabinoxylans (AX) and an advanced biofuel, such as biobutanol. A prehydrolysate with 17 g/L AX was obtained at 172 °C and 0.38 M NaOH, which were subsequently precipitated using an organosolvent process, recovering 133 kg AX/t BSG. The subsequent enzymatic hydrolysis with endo-xylanases significantly increased the concentration ofoligomers with 2-6 units of xylose. The presence of oligosaccharides with a degree of polymerization (DP) from 3 to 27 was confirmed by MALDI-TOF MS. On the other hand, the pretreated solid residue obtained in the microwave assisted alkaline pretreatment was enzymatically hydrolyzed with cellulases and fermented by Clostridium beijerinckii, producing 9.9 g/L butanol (28 kg butanol/t BSG and 37 kg ABE/t BSG). Thus, the potential for the efficient use of BSG in an integrated biorefinery was demonstrated.
2021-06-25
2021-06-25
2020
info:eu-repo/semantics/article
Industrial Crops and Products, 2020, vol. 158, p. 113044
0926-6690
https://uvadoc.uva.es/handle/10324/47063
10.1016/j.indcrop.2020.113044
113044
Industrial Crops and Products
158
eng
https://www.sciencedirect.com/science/article/pii/S0926669020309614
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2020 Elsevier
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier