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

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 26.6g ethanol/100 g CSEOH or 10.1 g ethanol/100 g untreated cardoon.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

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

doi

10.1016/j.biortech.2015.03.037

subject

Has Abstract

pub_date

2015-06-01 00:00:00

pages

309-315

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(15)00367-3

journal_volume

186

pub_type

杂志文章

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