Enzymatic saccharification and bioethanol production from Cynara cardunculus pretreated by steam explosion

被引：69

作者：

Fernandes, Maria C. ^{[1
]}

Ferro, Miguel D. ^{[1
]}

Paulino, Ana F. C. ^{[1
]}

Mendes, Joana A. S. ^{[2
]}

Gravitis, Janis ^{[3
]}

Evtuguin, Dmitry V. ^{[2
]}

Xavier, Ana M. R. B. ^{[2
]}

机构：

[1] Inst Politecn Beja IPBeja, Ctr Biotecnol Agr & Agroalimentar Alentejo CEBAL, P-7801908 Beja, Portugal

[2] Univ Aveiro, CICECO, Aveiro Inst Mat, Dept Quim, P-3810193 Aveiro, Portugal

[3] Latvian State Inst Wood Chem, Lab Ecoeffect Convers, Riga, Latvia

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 186卷

关键词：

Steam explosion pretreatment; Cardoon; Lignin; Simultaneous saccharification and fermentation (SSF); Separate hydrolysis and fermentation (SHF); ETHANOL-PRODUCTION; ACID PRETREATMENT; RAW-MATERIAL; HYDROLYSIS; L; BIOMASS; STALKS; SUITABILITY; CARDOON;

D O I：

10.1016/j.biortech.2015.03.037

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The correct choice of the specific lignocellulosic biomass pretreatment allows obtaining high biomass conversions for biorefinery implementations and cellulosic bioethanol production from renewable resources. Cynara cardunculus (cardoon) pretreated by steam explosion (SE) was involved in second-generation bioethanol production using separate hydrolysis and fermentation (SHF) or simultaneous saccharification and fermentation (SSF) processes. Steam explosion pretreatment led to partial solubilisation of hemicelluloses and increased the accessibility of residual polysaccharides towards enzymatic hydrolysis revealing 64% of sugars yield against 11% from untreated plant material. Alkaline extraction after SE pretreatment of cardoon (CSEOH) promoted partial removal of degraded lignin, tannins, extractives and hemicelluloses thus allowing to double glucose concentration upon saccharification step. Bioethanol fermentation in SSF mode was faster than SHF process providing the best results: ethanol concentration 18.7 g L-1, fermentation efficiency of 66.6% and a yield of 26.6 g ethanol/100 g CSEOH or 10.1 g ethanol/100 g untreated cardoon. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：309 / 315

页数：7

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