Combined alkali and hydrothermal pretreatments for oat straw valorization within a biorefinery concept

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논문

Combined alkali and hydrothermal pretreatments for oat straw valorization within a biorefinery concept

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Romani, A.; Tomaz, P.D.; Garrote, G.; Teixeira, J.A.; Domingues, L.

초록

The aim of this work was the evaluation of lime pretreatment combined or not with previous step of autohydrolysis for oat straw valorization. Under selected conditions of lime pretreatment, 96% of glucan and 77% of xylan were recovered and 42% of delignification was achieved. Xylose fermentation to ethanol by metabolic engineered Saccharomyces cerevisiae (MEC1133) strain improved the ethanol production by 22% achieving 41g/L. Alternatively, first step of autohydrolysis (S<SUB>0</SUB>=4.22) allowed a high oligosaccharides recovery (68%) and subsequent lime pretreatment attained a 57% of delignification and 99% of glucan to glucose conversion. Oat straw processed by autohydrolysis and lime pretreatment reached the maximal ethanol concentration (50g/L). Both strategies led to oat straw valorization into bioethanol, oligosaccharides and lignin indicating that these pretreatments are adequate as a first stage within an oat straw biorefinery.

발행연도

2016

발행기관

Elsevier Applied Science

ISSN

0960-8524

권

220

페이지

pp.323-332

DOI

10.1016/j.biortech.2016.08.077