Abstract
The hydrogen-oxidizing bacterium, Alcaligenes eutrophus (ATCC 17707), was grown in chemostat culture with gas-phase (hydrogen, oxygen, and carbon dioxide) and liquid-phase (mineral nutrients) feedstreams; data were used to generate an analytical form for the specific growth rate equation. Model parameters obtained include Monod rate parameters for dissolved hydrogen and oxygen gases, yield coefficients, and specific maintenance rates under conditions of hydrogen or oxygen limitations. These values are similar to some obtained previously by Ohi et al. for another hydrogen bacterium. The observed increase in specific maintenance rates under hydrogen-versus-oxygen-limited culture may be associated with hydrogenase deactivation by oxygen.
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