Valorization of steam-exploded wheat straw through a biorefinery approach: Bioethanol and bio-oil co-production

The potential of co-producing two different biofuels from a lignocellulosic substrate (wheat straw), according to a biorefinery concept, has been investigated. For such a purpose, simultaneous saccharification and fermentation (SSF) from the hemicellulosic and cellulosic fractions was performed for maximizing bioethanol production. The non-washed water-insoluble solid (WIS) fraction from the pretreated wheat straw totally inhibited the production of ethanol by Kluyveromyces marxianus independently of the inoculum size. In contrast, when using washed-WIS, higher ethanol productivities at 24h of SSF were attained when increasing the inoculum size from 1g/L to 3g/L. The residual lignin from the bioethanol process was transformed by fast-pyrolysis into bio-oil that can be further converted into other biofuels or biochemicals.

» Author: E. Tomás-Pejó, J. Fermoso, E. Herrador, H. Hernando, S. Jiménez-Sánchez, M. Ballesteros, C. González-Fernández, D.P. Serrano

» Reference: Fuel, Volume 199

» Publication Date: 01/07/2017

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This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement N° 690103