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Effects of biofilm structures on oxygen distribution and mass transport

Effects of biofilm structures on oxygen distribution and mass transport
Effects of biofilm structures on oxygen distribution and mass transport
Aerobic biofilms were found to have a complex structure consisting of microbial cell clusters (discrete aggregates of densely packed cells) and interstitial voids. The oxygen distribution was strongly correlated with these strutures. The voids facilitated oxygen transport from the bulk liquid through the biofilm, supplying approximately 50% of the total oxygen consumed by the cells. The mass transport rate from the bulk liquid is influenced by the biofilm structure; the observed exchange surface of the biofilm is twice that calculated for a simple planar geometry. The oxygen diffusion occurred in the direction normal to the cluster surfaces, the horizontal and vertical components of the oxygen gradients were of equal importance. Consequently, for calculations of mass transfer rates a three-dimensional model is necessary. These findings imply that to accurately describe biofilm activity, the relation between the arrangement of structural components and mass transfer must be undrstood. (c) 1994 John Wiley & Sons, Inc.
confocal microscopy, microelectrodes, cell clusters, pores
0006-3592
1131-1138
de Beer, Dirk
cb8d8130-86eb-4ecb-9496-41543e1fe536
Stoodley, Paul
08614665-92a9-4466-806e-20c6daeb483f
Roe, Frank
06914d67-6bed-4c47-94f2-45c71402dcbb
Lewandowski, Zbigniew
4d5421d3-f3aa-4f94-bbdf-9c5e898d20f7
de Beer, Dirk
cb8d8130-86eb-4ecb-9496-41543e1fe536
Stoodley, Paul
08614665-92a9-4466-806e-20c6daeb483f
Roe, Frank
06914d67-6bed-4c47-94f2-45c71402dcbb
Lewandowski, Zbigniew
4d5421d3-f3aa-4f94-bbdf-9c5e898d20f7

de Beer, Dirk, Stoodley, Paul, Roe, Frank and Lewandowski, Zbigniew (1994) Effects of biofilm structures on oxygen distribution and mass transport. Biotechnology and Bioengineering, 43 (11), 1131-1138. (doi:10.1002/bit.260431118).

Record type: Article

Abstract

Aerobic biofilms were found to have a complex structure consisting of microbial cell clusters (discrete aggregates of densely packed cells) and interstitial voids. The oxygen distribution was strongly correlated with these strutures. The voids facilitated oxygen transport from the bulk liquid through the biofilm, supplying approximately 50% of the total oxygen consumed by the cells. The mass transport rate from the bulk liquid is influenced by the biofilm structure; the observed exchange surface of the biofilm is twice that calculated for a simple planar geometry. The oxygen diffusion occurred in the direction normal to the cluster surfaces, the horizontal and vertical components of the oxygen gradients were of equal importance. Consequently, for calculations of mass transfer rates a three-dimensional model is necessary. These findings imply that to accurately describe biofilm activity, the relation between the arrangement of structural components and mass transfer must be undrstood. (c) 1994 John Wiley & Sons, Inc.

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More information

Published date: May 1994
Keywords: confocal microscopy, microelectrodes, cell clusters, pores
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 157475
URI: https://eprints.soton.ac.uk/id/eprint/157475
ISSN: 0006-3592
PURE UUID: fb98f0d4-f956-4556-874d-42f0f057c6b8
ORCID for Paul Stoodley: ORCID iD orcid.org/0000-0001-6069-273X

Catalogue record

Date deposited: 15 Jun 2010 13:35
Last modified: 19 Jun 2019 00:33

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