Abstract
Rhodococcus sp. P1 utilizes phenol as the sole carbon and energy source via the β-ketoadipate pathway. In batch cultivation, concentrations up to 2.8g · l-1 phenol were degraded. The highest values for the specific growth rate of 0.32 h-1 were obtained at concentrations near 0.25 g · l-1. At higher concentrations, substrate inhibition was observed, characterized by increases in lag phase and decreasing growth rates. A mathematical expression was proposed to fit the kinetic pattern of phenol inhibition on the specific growth rate μ:
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Nomenclature: K — Exponent of the inhibition function, KS — Monod saturation constant, g · l-1, KI — Inhibition constant, g · l-1, S — Substrate concentration in culture broth, g · l-1, So — Initial substrate concentration, g · l-1, Y — Yield constant, g cell dry mass · g substrate-1, μ — Specific growth rate, h-1, μmax —Maximum growth rate, h-1
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Straube, G., Hensel, J., Niedan, C. et al. Kinetic studies of phenol degradation by Rhodococcus sp. P1 I. Batch cultivation. Antonie van Leeuwenhoek 57, 29–32 (1990). https://doi.org/10.1007/BF00400332
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DOI: https://doi.org/10.1007/BF00400332