Kinetic studies of phenol degradation by Rhodococcus sp. P1. I. Batch cultivation.
Rhodococcus sp. P1 utilizes phenol as the sole carbon and energy source via the beta-ketoadipate pathway. In batch cultivation, concentrations up to 2.8 g.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 mu: [formula: see text] 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, mu- Specific growth rate, h-1, mu max- Maximum growth rate, h-1.
Straube
G
G
Technical University Carl Schorlemmer Leuna-Merseburg, Merseburg, GDR.
Hensel
J
J
Niedan
C
C
Straube
E
E
D003470:Culture Media; D007700:Kinetics; D010636:Phenols / Q000378:metabolism*; D012240:Rhodococcus / Q000254:growth & development / Q000378:metabolism*
D003470:Culture Media; D010636:Phenols