Evaluation of correlation between glucan conversion and degree of delignification depending on pretreatment strategies using Jabon Merah

•Glucan conversion was evaluated using highly recalcitrant biomass, Jabon Merah.•86.0% of hemicellulose was removed via liquid hot water treatment (1st step).•Three types of 2nd step treatment were effective to improve glucan conversion.•Delignification and glucose conversion rate were highly correl...

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Bibliographic Details
Published in:Bioresource technology 2017-07, Vol.236, p.111-118
Main Authors: Jang, Soo-Kyeong, Jeong, Hanseob, Kim, Ho-Yong, Choi, June-Ho, Kim, Jong-Hwa, Koo, Bon-Wook, Choi, In-Gyu
Format: Article
Language:English
Subjects:
Biomass
Biomass recalcitrance
Cellulose - chemistry
Delignification
Glucan conversion
Glucans - chemistry
Hydrolysis
Jabon Merah
Lignin - chemistry
Pretreatment
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Summary:•Glucan conversion was evaluated using highly recalcitrant biomass, Jabon Merah.•86.0% of hemicellulose was removed via liquid hot water treatment (1st step).•Three types of 2nd step treatment were effective to improve glucan conversion.•Delignification and glucose conversion rate were highly correlated (R2=0.84).•Other factors also contributed the high recalcitrance of Jabon Merah. The main purpose of this study was to investigate the glucan conversion rate after enzymatic hydrolysis depending on the treatment methods and conditions with changes in the chemical composition of treated solid fraction of Jabon Merah. The glucan conversion rate (17.4%) was not significantly improved after liquid hot water treatment (1st step) even though most of the hemicellulose was dissolved into liquid hydrolysate. Subsequently, dilute acid, organosolv, and peracetic acid treatment (2nd step) was conducted under various conditions to enhance glucan conversion. Among the 2nd step treatment, the glucan conversion rate of organosolv (max. 46.0%) and peracetic acid treatment (max. 65.9%) was increased remarkably through decomposition of acid-insoluble lignin (AIL). Finally, the glucan conversion rate and AIL content were highly correlated, which was revealed by the R-squared value (0.84), but inhibitory factors including cellulose crystallinity must be considered for advanced glucan conversion from highly recalcitrant biomasses, such as Jabon Merah.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2017.03.154