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Mild alkali-pretreatment effectively extracts guaiacyl-rich lignin for high lignocellulose digestibility coupled with largely diminishing yeast fermentation inhibitors in Miscanthus.
- Source :
-
Bioresource Technology . Oct2014, Vol. 169, p447-454. 8p. - Publication Year :
- 2014
-
Abstract
- In this study, various alkali-pretreated lignocellulose enzymatic hydrolyses were evaluated by using three standard pairs of Miscanthus accessions that showed three distinct monolignol (G, S, H) compositions. Mfl26 samples with elevated G-levels exhibited significantly increased hexose yields of up to 1.61-fold compared to paired samples derived from enzymatic hydrolysis, whereas Msa29 samples with high H-levels displayed increased hexose yields of only up to 1.32-fold. In contrast, Mfl30 samples with elevated S-levels showed reduced hexose yields compared to the paired sample of 0.89–0.98 folds at p < 0.01. Notably, only the G-rich biomass samples exhibited complete enzymatic hydrolysis under 4% NaOH pretreatment. Furthermore, the G-rich samples showed more effective extraction of lignin–hemicellulose complexes than the S- and H-rich samples upon NaOH pretreatment, resulting in large removal of lignin inhibitors to yeast fermentation. Therefore, this study proposes an optimal approach for minor genetic lignin modification towards cost-effective biomass process in Miscanthus . [ABSTRACT FROM AUTHOR]
- Subjects :
- *ALKALI metals
*LIGNINS
*LIGNOCELLULOSE
*YEAST
*FERMENTATION
*MISCANTHUS
*HYDROLYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 09608524
- Volume :
- 169
- Database :
- Academic Search Index
- Journal :
- Bioresource Technology
- Publication Type :
- Academic Journal
- Accession number :
- 97656802
- Full Text :
- https://doi.org/10.1016/j.biortech.2014.07.017