期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 187, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.indcrop.2022.115313
关键词
Biorefinery; Autohydrolysis; Microwave; Conventional heating; Oligosaccharides; Enzymatic hydrolysis
资金
- University of Vigo
- CISUG
- MINECO (Spain) [PID2019-110031RB-I00]
- Conselleria de Cultura, Educacion e Ordenacion Universitaria (Xunta de Galicia) [ED431C 2017/62-GRC]
- ERDF
- Ministry of Science, Innovation and Universities of Spain [FPU16/04077]
- RYC [RYC2018-026177-I]
Microwave hydrothermal treatment (MHT) is a sustainable technology for the valorization of lignocellulosic materials by solubilizing hemicellulosic-derived compounds into oligosaccharides. The spent solids from MHT and conventional hydrothermal treatment (CHT) showed different enzymatic digestibility, with MHT consuming less energy than CHT.
Microwave hydrothermal treatment (MHT) is considered a sustainable technology for the valorization of lignocellulosic materials, enabling the solubilization of hemicellulosic-derived compounds, especially in the form of oligosaccharides that may present potential in the chemical, pharmaceutical or nutraceutical industries. Hence, MHT at 200 and 230 degrees C, at severity (S-0) among 2.92-4.66 were performed. S-0 = 3.98 permitted the recovery of about 80% of the initial xylan as xylooligosaccharides. In order to compare the effectiveness of MHT, conventional hydrothermal treatment (CHT) was performed at conditions leading to the maximum recovery of oligosaccharides (S-0 = 3.98, non-isothermal regime at 203 degrees C). Despite the structural features of oligomers in the three liquors were very similar, the spent solids presented different enzymatic digestibility, which implied a different effect of the treatments, reaching up to 80% of glucan to glucose conversion for the solid after MHT at 230 degrees C for 0.5 min. Additionally, CHT consumed 2.1-2.8-fold greater energy than MHT, reflecting that microwave-assisted autohydrolysis is a sustainable and efficient technology to process PW.
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