Document Detail


Ethanol fermentation with Kluyveromyces marxianus from Jerusalem artichoke grown in salina and irrigated with a mixture of seawater and freshwater.
MedLine Citation:
PMID:  19120653     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: To study fuel ethanol fermentation with Kluyveromyces marxianus ATCC8554 from Jerusalem artichoke (Helianthus tuberosus) grown in salina and irrigated with a mixture of seawater and freshwater. METHODS AND RESULTS: The growth and ethanol fermentation of K. marxianus ATCC8554 were studied using inulin as substrate. The activity of inulinase, which attributes to the hydrolysis of inulin, the main carbohydrate in Jerusalem artichoke, was monitored. The optimum temperatures were 38 degrees C for growth and inulinase production, and 35 degrees C for ethanol fermentation. Aeration was not necessary for ethanol fermentation with the K. marxianus from inulin. Then, the fresh Jerusalem artichoke tubers grown in salina and irrigated with 25% and 50% seawater were further examined for ethanol fermentation with the K. marxianus, and a higher ethanol yield was achieved for the Jerusalem artichoke tuber irrigated with 25% seawater. Furthermore, the dry meal of the Jerusalem artichoke tubers irrigated with 25% seawater was examined for ethanol fermentation at three solid concentrations of 200, 225 and 250 g l(-1), and the highest ethanol yield of 0.467, or 91.5% of the theoretical value of 0.511, was achieved for the slurry with a solid concentration of 200 g l(-1). CONCLUSIONS: Halophilic Jerusalem artichoke can be used for fuel ethanol production. SIGNIFICANCE AND IMPACT OF THE STUDY: Halophilic Jerusalem artichoke, not competing with grain crops for arable land, is a sustainable feedstock for fuel ethanol production.
Authors:
W J Yuan; X Q Zhao; X M Ge; F W Bai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied microbiology     Volume:  105     ISSN:  1365-2672     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2009-01-05     Completed Date:  2009-10-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2076-83     Citation Subset:  IM    
Affiliation:
Department of Bioscience and Bioengineering, Dalian University of Technology, Dalian, China.
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MeSH Terms
Descriptor/Qualifier:
Bioreactors / microbiology
Ethanol / metabolism*
Fresh Water
Glycoside Hydrolases / metabolism*
Helianthus / microbiology*
Inulin / metabolism
Kluyveromyces / enzymology*,  growth & development
Plant Tubers / microbiology*
Seawater
Temperature
Chemical
Reg. No./Substance:
64-17-5/Ethanol; 9005-80-5/Inulin; EC 3.2.1.-/Glycoside Hydrolases; EC 3.2.1.7/inulinase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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