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Impact of the shear stress on initial bacterial adhesion

Abstract : Hydrodynamic strength plays a key role in microbial adhesion. This first step of biofilm formation constitutes a critical stage in biofilm development and management (Liu & Tay 2002). A better understanding of the impact of shear on microbial adhesion is crucial to prevent detrimental biofilm formation for sanitary or economic reasons - or in contrary develop a beneficial biofilm system such as in environmental engineering. Adhesion involves transport of bacteria to the substratum surface and their attachment. Hydrodynamic conditions can have paradoxical and complicated effects on adhesion (Busscher & Van der Mei 2006). On the one hand, improving mixing and fluid velocity in the liquid phase enhances access of bacteria to the substratum. On the other hand, shear also increases promoting detachment forces. In the literature, many studies devoted to the impact of shear on adhesion were realized in pure culture and under a laminar flow. The novelty of this work lies in that it was done for mixed culture in a turbulent flow which is more relevant for bioprocess engineering. Both qualitative and quantitative aspects of adhesion were characterized to better understand the role of shear on bacterial adhesion.
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Submitted on : Tuesday, June 2, 2020 - 11:57:55 PM
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  • HAL Id : hal-02740827, version 1
  • PRODINRA : 270728


Thibaut Saur, Frédéric Habouzit, Nicolas Bernet, Renaud R. Escudie. Impact of the shear stress on initial bacterial adhesion. Biofilms 6, University of Vienna [Vienna]. AUT., May 2014, Vienne, Austria. ⟨hal-02740827⟩



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