Enzymatic saccharification and bioethanol production from Cynara cardunculus pretreated by steam explosion
authors Fernandes, MC; Ferro, MD; Paulino, AFC; Mendes, JAS; Gravitis, J; Evtuguin, DV; Xavier, AMRB
nationality International
journal BIORESOURCE TECHNOLOGY
author keywords Steam explosion pretreatment; Cardoon; Lignin; Simultaneous saccharification and fermentation (SSF); Separate hydrolysis and fermentation (SHF)
keywords ETHANOL-PRODUCTION; ACID PRETREATMENT; RAW-MATERIAL; HYDROLYSIS; L.; BIOMASS; STALKS; SUITABILITY; CARDOON
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.
publisher ELSEVIER SCI LTD
issn 0960-8524
year published 2015
volume 186
beginning page 309
ending page 315
digital object identifier (doi) 10.1016/j.biortech.2015.03.037
web of science category Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels
subject category Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
unique article identifier WOS:000353190900040
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