| Enhancing alfalfa conversion efficiencies for sugar recovery and ethanol production by altering lignin composition. | |
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MedLine Citation:
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PMID: 21474304 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Alfalfa (Medicago sativa L.) biomass was evaluated for biochemical conversion into ethanol using dilute-acid and ammonia pretreatments. The two alfalfa lines compared were a reduced S-lignin transgenic cultivar generated through down regulation of the caffeic acid O-methyltransferase gene and a wild-type control. Both were harvested at two maturities. All the samples had similar carbohydrate contents including a mean composition of 316g glucan and 497g total neutral carbohydrates per kg dry biomass, which corresponds to a theoretic ethanol yield of 382l/ton. Ethanol yields for alfalfa stems pretreated with dilute-acid were significantly impacted by harvest maturity and lignin composition, whereas when pretreated with dilute-ammonia, yield was solely affected by lignin composition. Use of a recombinant xylose-fermenting Saccharomyces strain, for converting the ammonia pretreated alfalfa samples, further increased ethanol yields. Ethanol yields for the xylose-fermenting yeast were 232-278l/ton and were significantly enhanced for the reduced S lignin cultivars. |
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Authors:
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Bruce S Dien; David J Miller; Ronald E Hector; Richard A Dixon; Fang Chen; Mark McCaslin; Peter Reisen; Gautam Sarath; Michael A Cotta |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-15 |
Journal Detail:
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Title: Bioresource technology Volume: - ISSN: 1873-2976 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-4-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Published by Elsevier Ltd. |
Affiliation:
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Bioenergy Research Unit, United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL 61604, United States. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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