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Ensiling - Wet-storage method for lignocellulosic biomass for bioethanol production

Oleskowicz-Popiel, Piotr; Thomsen , Anne Belinda and Schmidt, Jens Ejbye (2011) Ensiling - Wet-storage method for lignocellulosic biomass for bioethanol production. Biomass and Bioenergy, 35, pp. 2087-2092.

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Summary

Ensiling of humid biomass samples wrapped in plastic bales has been investigated as a wet-storage for bioethanol production from three lignocellulosic biomass samples i.e. maize, rye, and clover grass. During the silage process, lactic acid bacteria fermented free sugars to lactic acid, and consequently by lowing pH, inhibiting other microbes to degrade the polysaccharides. Following silage treatment, enzymatic convertibility tests showed that 51.5%, 36.5%, and 41.9% of the cellulose was converted by cellulytic enzymes in ensiled maize, rye, and clover grass, respectively. In addition, tests of SSF (simultaneous saccharification and fermentation) were carried out using combined enzymatic hydrolysis and fermentation with two different microorganisms Saccharomyces cerevisiae and Kluyveromyces marxianus. The ethanol production was 33.0%, 27.5%, 36.9% (by K. marxianus) and 29.0%, 28.1%, 34.5% (by S. cerevisiae); the yields significantly increased after hydrothermal pretreatment: 77.7%, 72.8%, 79.5% (by K. marxianus) and 72.0%, 80.7%, 75.7% (by S. cerevisiae)
of the theoretical based on the C6 sugar contents in maize, rye, and clover grass, respectively.


EPrint Type:Journal paper
Subjects: Crop husbandry > Post harvest management and techniques
Research affiliation: Denmark > DARCOF III (2005-2010) > BIOCONCENS - Biomass and bio-energy production in organic agriculture
Deposited By: Kádár, Zsófia
ID Code:19013
Deposited On:30 Jun 2011 10:34
Last Modified:26 Jul 2011 08:53
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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