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Dynamics of a Biological Fixed Film for Phenol Degradation in a Fluidized-bed Bioreactor by Robert Mark Worden; Terrence L. Donaldson is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Dynamics of a Biological Fixed Film for Phenol Degradation in a Fluidized-bed Bioreactor about?

Experimental and modeling studies were conducted to analyze the dynamic response behavior of a phenol-oxidizing fixed film using a differential, fluidized-bed bioreactor in a recycle loop with a well-mixed reservoir. With the bioreactor at steady state, a pulse of phenol was added to perturb the system, and the phenol concentration was monitored continuously until steady state was again achieved. The experimental dynamics were compared with a dynamic mathematical model based on diffusion and reaction within the biofilm, liquid mixing, and biofilm growth. Constant-pH experiments could be adequately described using an unstructured, double-Monod kinetic expression with substrate inhibition by phenol. However, in dynamic experiments without pH control, the pH of the liquid phase dropped, and damped oscillations were observed in the phenol concentration and reaction rate trajectories. Oscillatory solutions could not be induced in the model, even when product inhibition was included, and a linear stability analysis did not reveal tendencies toward instability. The cause of the experimental oscillations remains unknown.

Who reads Dynamics of a Biological Fixed Film for Phenol Degradation in a Fluidized-bed Bioreactor?

Author

Robert Mark Worden; Terrence L. Donaldson

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0006-3592)

Published

1987

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)