2007
DOI: 10.1002/bit.21456
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Tracer measurements reveal experimental evidence of biofilm consolidation

Abstract: SummaryThe ability to simultaneously measure both biofilm thickness and the mass transfer coefficient of an inert tracer through it provides a powerful method to study biofilm development. In this communication previously published data has been collated to interpret global trends in biofilm structure during the transition towards steady-state. It appears that sudden changes in biofilm structure (directly related to the rate of change of biofilm mass transfer resistance) may occur following transitions in rate… Show more

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Cited by 16 publications
(11 citation statements)
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References 40 publications
(30 reference statements)
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“…In cases where the normal stresses are great enough, the biofilm undergoes compression because of its porous structure. This compression actually refers to biofilm consolidation, phenomenon that has been previously described by Laspidou and Rittmann (2004a); Alpkvist et al, 2006;Casey, 2007. It increases the internal strength, possibly explaining why this basal layer is much more resistant to high shear stress.…”
Section: 2mentioning
confidence: 89%
“…In cases where the normal stresses are great enough, the biofilm undergoes compression because of its porous structure. This compression actually refers to biofilm consolidation, phenomenon that has been previously described by Laspidou and Rittmann (2004a); Alpkvist et al, 2006;Casey, 2007. It increases the internal strength, possibly explaining why this basal layer is much more resistant to high shear stress.…”
Section: 2mentioning
confidence: 89%
“…biofilm thickness) should be carried out under shear stress in order to produce representative results. Casey [6] proposed compaction as a mechanism contributing to the structural realignment of the biofilm under high shear force. Compaction is defined as the increase in density and the decrease in porosity of a biofilm, resulting in a thickness decrease of the biofilm.…”
Section: Introductionmentioning
confidence: 99%
“…While de‐levelling of microbial mats has yet to be studied in detail, the observation of biofilm compression and density increase without complete detachment from solid surfaces, under laboratory conditions, is consistent with field observations post‐TC Olwyn. Hydrodynamic compression of biofilms resulted in permanent structural changes, including density changes (Casey, 2007) which decrease porosity and increased hydraulic resistance (Picioreanu et al, 2018).…”
Section: Discussion: Impacts Of Tc Olwynmentioning
confidence: 99%