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Modeling Stability of Photoheterotrophic Continuous Cultures in Photobioreactors
Author(s) -
Cornet JeanFrançois,
Favier Lidia,
Dussap ClaudeGilles
Publication year - 2008
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp034041l
Subject(s) - photobioreactor , residence time (fluid dynamics) , rhodospirillaceae , biological system , rhodospirillum rubrum , environmental science , materials science , photosynthesis , chemistry , botany , biology , engineering , ecology , biofuel , biochemistry , geotechnical engineering , enzyme
Continuous cultures of the purple non‐sulfur bacterium Rhodospirillum rubrum were grown in a cylindrical photobioreactor in photoheterotrophic conditions, using acetate as carbon source. A new kinetic and stoichiometric knowledge model was developed, and its ability to simulate experimental results obtained under varying incident light fluxes and residence times is discussed. The model accurately predicts the stable, unstable, or oscillating behavior observed for the reactor productivity. In particular, the values of residence time corresponding to a subcritical bifurcation with a typical hysteresis effect are calculated and analyzed. The robustness of the proposed model allows the engineering operating domain of the photobioreactor function to be set and offers a promising tool for the design and control of such photoheterotrophic processes.