| Modeling and simulation of competition between two microorganisms for a single inhibitory substrate in a biofilm reactor. | |
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MedLine Citation:
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PMID: 10578096 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A simple biofilm model was developed to simulate the competition between two microorganisms for a common inhibitory substrate. The following assumptions were made for the simulations: (1) the biofilm has a uniform thickness and is composed of 5 segments, (2) growth of two microorganisms A and B which utilize the common substrate is expressed by the Haldane kinetics with a spatial limitation term and is independent of the other microorganism in the biofilm reactor, and (3) diffusion of the substrate, movement of the microorganisms, and continuous loss of the biomass by shearing are expressed by Fick's Law-type equations. The qualitative behavior of the biofilm reactor is characterized by five regions, I-V, depending on the operation conditions, the substrate concentration in feed, and the dilution rate. In region I, both microorganisms are washed out of the biofilm reactor. In region II, microorganism B is washed out, and in region III, microorganism A is washed out of the biofilm. In region IV, both microorganisms coexist with one another. In region V, both microorganisms coexist with a sustained oscillatory behavior. Convergence to regions I-V depends on the initial conditions. In regions II-V, washout of either or both microorganisms is also observed with initial conditions too far away. |
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Authors:
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S Soda; E Heinzle; M Fujita |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Biotechnology and bioengineering Volume: 66 ISSN: 0006-3592 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 1999 |
Date Detail:
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Created Date: 2000-02-07 Completed Date: 2000-02-07 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 258-64 Citation Subset: IM; S |
Copyright Information:
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Copyright 1999 John Wiley & Sons, Inc. |
Affiliation:
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Department of Environmental Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka, 565-0871 Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biofilms
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growth & development Bioreactors* Biotechnology Diffusion Microbiology Models, Biological* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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