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  5. Mechanical properties of a mature biofilm from a wastewater system: from microscale to macroscale level
 
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Mechanical properties of a mature biofilm from a wastewater system: from microscale to macroscale level

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Author(s)
Safari, Ashkan 
Tuković, Željko 
Walter, Maik 
Casey, Eoin 
Ivankovic, Alojz 
Uri
http://hdl.handle.net/10197/24163
Date Issued
15 September 2015
Date Available
08T16:06:24Z February 2023
Abstract
A fundamental understanding of biofilm mechanical stability is critical in order to describe detachment and develop biofouling control strategies. It is thus important to characterise the elastic deformation and flow behaviour of the biofilm under different modes of applied force. In this study, the mechanical properties of a mature wastewater biofilm were investigated with methods including macroscale compression and microscale indentation using atomic force microscopy (AFM). The mature biofilm was found to be mechanically isotropic at the macroscale level as its mechanical properties did not depend on the scales and modes of loading. However, the biofilm showed a tendency for mechanical inhomogeneity at the microscale level as indentation progressed deeper into the matrix. Moreover, it was observed that the adhesion force had a significant influence on the elastic properties of the biofilm at the surface, subjected to microscale tensile loading. These results are expected to inform a damage-based model for biofilm detachment.
Sponsorship
Science Foundation Ireland
Type of Material
Journal Article
Publisher
Taylor and Francis
Journal
Biofouling: The Journal of Bioadhesion and Biofilm Research
Volume
31
Issue
8
Start Page
651
End Page
664
Copyright (Published Version)
2015 Taylor and Francis
Keywords
  • Biofilm

  • Elastic modulus

  • Viscoelastic properti...

  • Macroscale mechanical...

  • Atomic force spectros...

DOI
10.1080/08927014.2015.1075981
Language
English
Status of Item
Peer reviewed
ISSN
0892-7014
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by/3.0/ie/
Owning collection
Chemical and Bioprocess Engineering Research Collection
Scopus© citations
21
Acquisition Date
Mar 26, 2023
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Mar 26, 2023
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