Document Detail

Design, operation, and modeling of a membrane photobioreactor to study the growth of the Cyanobacterium Arthrospira platensis in space conditions.
MedLine Citation:
PMID:  15932251     Owner:  NLM     Status:  MEDLINE    
A membrane photobioreactor was designed, implemented and used to grow the cyanobacterium Arthrospira platensis PCC 8005 in batch mode. Growth was followed directly by monitoring optical density and indirectly by measuring pressure increase due to the oxygen produced and separated from the liquid phase by diffusion through a hydrophobic membrane, and pH increase due to carbon consumption. When the pressure attained an upper limit, valves opened automatically, and the oxygen in the gas chamber was flushed out with nitrogen. As expected, two growth phases were observed, a short exponential phase followed by a linear phase, indicating limitation by light transfer. Growth rate during the second phase was measured easily and accurately, and consistency of optical density, pressure and pH data values was checked using a model of the system. Pressure measurement was found best suited to monitoring and measuring growth rate in space in terms of accuracy, precision and reliability.
Guillaume Cogne; Jean-François Cornet; Jean-Bernard Gros
Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Biotechnology progress     Volume:  21     ISSN:  8756-7938     ISO Abbreviation:  Biotechnol. Prog.     Publication Date:    2005 May-Jun
Date Detail:
Created Date:  2005-06-03     Completed Date:  2005-09-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8506292     Medline TA:  Biotechnol Prog     Country:  United States    
Other Details:
Languages:  eng     Pagination:  741-50     Citation Subset:  IM    
Laboratoire de Génie Chimique et Biochimique, Université Blaise Pascal, CUST, 24 avenue des Landais, BP 206, 63174 Aubière-Cedex, France.
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MeSH Terms
Bioreactors / microbiology*
Cell Culture Techniques / instrumentation*,  methods
Computer Simulation
Computer-Aided Design*
Cyanobacteria / growth & development*,  radiation effects*
Equipment Design / methods
Equipment Failure Analysis
Feedback / physiology
Hydrogen-Ion Concentration
Models, Biological*
Photobiology / instrumentation*,  methods
Space Simulation

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

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