| Effect of aeration rate on the alcoholic fermentation of whey by Kluyveromyces fragilis. | |
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MedLine Citation:
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PMID: 1605917 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this paper, the influence of aeration rate on the alcoholic batch fermentation of whey by Kluyveromyces fragilis NRRL Y-2415 was investigated. Assays in 1.5-L fermentor using concentrated whey permeate containing 100 g/L of lactose were carried out at different oxygen supply rate (KLaC*) from 0 to 82 mmol/Lh. Optimum response was obtained at 14 mmol/Lh: ethanol production rate reached was 3.4 g/Lh yielding 0.46 g of product per gram of initial lactose. An increase of KLaC* from 0 to 14 mmol/Lh improved the ethanol production: maximum specific ethanol production rate (qpm) increased 3.3 times from 0.3 to 1.0 g/gh. For higher aeration levels, ethanol production diminished and biomass formation was stimulated. The declination of qpm and the increase of microns at higher aeration level lead to conclude the importance of a controlled oxygen supply in order to obtain the required balance between yeast biosynthetic needs and ethanol production. |
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Authors:
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H Varela; M D Ferrari; L Loperena; C Lareo |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Microbiología (Madrid, Spain) Volume: 8 ISSN: 0213-4101 ISO Abbreviation: Microbiologia Publication Date: 1992 Apr |
Date Detail:
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Created Date: 1992-07-21 Completed Date: 1992-07-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8904895 Medline TA: Microbiologia Country: SPAIN |
Other Details:
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Languages: eng Pagination: 14-20 Citation Subset: IM |
Affiliation:
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Dep. Bioingeniería, Facultad de Ingeniería, Montevideo, Uruguay. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Dairy Products* Ethanol / metabolism* Fermentation* Industrial Microbiology / methods* Kluyveromyces / drug effects, growth & development, metabolism* Lactose / metabolism* Milk / metabolism* Oxygen / pharmacology* |
| Chemical | |
Reg. No./Substance:
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63-42-3/Lactose; 64-17-5/Ethanol; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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