Combined effect of substrate concentration and flow velocity on effective diffusivity in biofilms

Haluk Beyenal; Zbigniew Lewandowski

doi:10.1016/S0043-1354(99)00147-5

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Combined effect of substrate concentration and flow velocity on effective diffusivity in biofilms

Journal article

Open access

Peer reviewed

Combined effect of substrate concentration and flow velocity on effective diffusivity in biofilms

Haluk Beyenal and Zbigniew Lewandowski

Water research (Oxford), Vol.34(2), pp.528-538

2000

DOI: https://doi.org/10.1016/S0043-1354(99)00147-5

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https://hdl.handle.net/2376/107939

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Abstract

effective diffusivity

biofilm structure

biofilms

biofilm modeling

We have evaluated the influence of glucose concentration and flow velocity at which biofilms were grown on the distribution of effective diffusivity in biofilms consisting of Pseudomonas aeruginosa, Pseudomonas fluorescens, and Klebsiella pneumoniae. From the local diffusivity profiles, measured by a novel microelectrode, the surface averaged relative effective diffusivities ( D s) were calculated at different depths in the biofilms. The D s decreased toward the bottom of the biofilms and the D s profiles were affected by growth conditions. The D s was higher in biofilms grown at high glucose concentrations and at low flow velocities; and it was influenced by the glucose concentration to a much larger extent than by the flow velocity.

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Title: Combined effect of substrate concentration and flow velocity on effective diffusivity in biofilms
Creators: Haluk Beyenal
Zbigniew Lewandowski
Publication Details: Water research (Oxford), Vol.34(2), pp.528-538
Academic Unit: Chemical Engineering and Bioengineering, School of
Publisher: Elsevier Ltd
Identifiers: 99900547278501842
Language: English
Resource Type: Journal article