oru.sePublikationer
Change search
ReferencesLink to record
Permanent link

Direct link
Airtight storage of moist wheat grain improves bioethanol yields
Uppsala Biocenter, Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden.ORCID iD: 0000-0002-2059-9044
Uppsala Biocenter, Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden; Chematur Engineering, Karlskoga, Sweden.
Uppsala Biocenter, Department of Molecular Biology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Uppsala Biocenter, Department of Molecular Biology, Swedish University of Agricultural Sciences, Uppsala, Sweden.ORCID iD: 0000-0003-4059-8580
Show others and affiliations
2009 (English)In: Biotechnology for Biofuels, ISSN 1754-6834, E-ISSN 1754-6834, Vol. 2, 16Article in journal (Refereed) Published
Abstract [en]

Background: Drying is currently the most frequently used conservation method for cereal grain, which in temperate climates consumes a major part of process energy. Airtight storage of moist feed grain using the biocontrol yeast Pichia anomala as biopreservation agent can substantially reduce the process energy for grain storage. In this study we tested the potential of moist stored grain for bioethanol production.

Results: The ethanol yield from moist wheat was enhanced by 14% compared with the control obtained from traditionally (dry) stored grain. This enhancement was observed independently of whether or not P. anomala was added to the storage system, indicating that P. anomala does not impair ethanol fermentation. Starch and sugar analyses showed that during pre-treatment the starch of moist grain was better degraded by amylase treatment than that of the dry grain. Additional pre-treatment with cellulose and hemicellulose-degrading enzymes did not further increase the total ethanol yield. Sugar analysis after this pre-treatment showed an increased release of sugars not fermentable by Saccharomyces cerevisiae.

Conclusion: The ethanol yield from wheat grain is increased by airtight storage of moist grain, which in addition can save substantial amounts of energy used for drying the grain. This provides a new opportunity to increase the sustainability of bioethanol production.

Place, publisher, year, edition, pages
London, United Kingdom: BioMed Central, 2009. Vol. 2, 16
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:oru:diva-52281DOI: 10.1186/1754-6834-2-16ISI: 000272094600001PubMedID: 19695089ScopusID: 2-s2.0-69549084653OAI: oai:DiVA.org:oru-52281DiVA: diva2:971423
Note

Funding Agency:

Faculty for Natural Resources and Agriculture at the Swedish University of Agricultural Sciences 

Available from: 2016-09-16 Created: 2016-09-16 Last updated: 2016-09-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Passoth, VolkmarStåhlberg, JerrySchnürer, Johan
In the same journal
Biotechnology for Biofuels
Energy Systems

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 38 hits
ReferencesLink to record
Permanent link

Direct link