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

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abstract

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.

keywords

ETHANOL-PRODUCTION; ACID PRETREATMENT; RAW-MATERIAL; HYDROLYSIS; L.; BIOMASS; STALKS; SUITABILITY; CARDOON

subject category

Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels

authors

Fernandes, MC; Ferro, MD; Paulino, AFC; Mendes, JAS; Gravitis, J; Evtuguin, DV; Xavier, AMRB

our authors

foto Ana Maria Rebelo Barreto Xavier

Ana Maria Rebelo Barreto Xavier

Assistant Professor
foto Dmitry Evtyugin

Dmitry Evtyugin

Associate Professor with Aggregation
no photo

Joana Andreia Saraiva Mendes

Groups

G4 - Renewable Materials and Circular Economy

Projects

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)

acknowledgements

This research was co-financed by INALENTEJO 2007.2013/QREN, within the project BioEcos-Valorizacao Integrada de Biomassa and FEDER - Portugal funds through COMPETE (Programa Operacional Factores de Competitividade) and within the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by Portuguese national funds through the FCT/MEC.; The steam explosion treatment of biomass has been supported by the Latvian National Research Programme

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Publication Details

type
Journal Article
year
2015
journal
BIORESOURCE TECHNOLOGY
volume
186
publisher
ELSEVIER SCI LTD
issn
0960-8524
digital object identifier
10.1016/j.biortech.2015.03.037
web of science article identifier
WOS:000353190900040

Journal Metrics (JCR 2019)

Journal Impact Factor
7.539
Journal Impact Factor (5 yrs)
7.27
category normalized journal percentile
92.54

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