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Studies on the effect of concentration of a self-inhibitory substrate on biofilm reaction rate under co-diffusion and counter diffusion configurations
Author(s)
Date Issued
2009-06-15
Date Available
2011-02-15T12:36:57Z
Abstract
A simple mathematical model was developed to investigate the utilization rate of a self-inhibitory substrate in idealised biofilm reactors operating with either counter-diffusion or co-diffusion of oxygen and phenol. This study has implications for the development of membrane-supported biofilm technologies, such as the membrane-aerated biofilm reactor. An unsteady-state formulation of the model was used to investigate the effect of shock loads of phenol on biofilm performance. It was found that the counter-diffusion configuration may be advantageous under high phenol concentrations provided the biofilm thickness is above a critical value. The performance advantage of the counter-diffusion configuration is gained by the presence of an oxygen depleted layer, adjacent to the liquid–biofilm interface which acts as a diffusive barrier to phenol transport to the region of respiratory activity.
Sponsorship
Not applicable
Type of Material
Journal Article
Publisher
Elsevier
Journal
Journal of Membrane Science
Volume
335
Issue
1-2
Start Page
76
End Page
82
Copyright (Published Version)
2009 Elsevier B.V.
Subject – LCSH
Biofilms
Phenol
Bioreactors
Membranes (Technology)
Web versions
Language
English
Status of Item
Peer reviewed
ISSN
0376-7388
This item is made available under a Creative Commons License
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