DOI: 10.1016/j.watres.2018.01.059
Scopus记录号: 2-s2.0-85041505830
论文题名: Biofilms in 3D porous media: Delineating the influence of the pore network geometry, flow and mass transfer on biofilm development
作者: Carrel M. ; Morales V.L. ; Beltran M.A. ; Derlon N. ; Kaufmann R. ; Morgenroth E. ; Holzner M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 134 起始页码: 280
结束页码: 291
语种: 英语
英文关键词: Biofilm
; Biofilm morphology
; Concentration boundary layer thickness
; Three-dimensional particle tracking velocimetry
; Three-dimensional porous medium
; Wall shear stress
; X-ray micro computed tomography
Scopus关键词: Blood vessels
; Boundary layer flow
; Boundary layers
; Computerized tomography
; Hydrodynamics
; Mass transfer
; Morphology
; Porous materials
; Shear stress
; Velocimeters
; Velocity measurement
; X rays
; Biofilm morphology
; Concentration boundary layer
; Particle tracking velocimetry
; Porous medium
; Wall shear stress
; X ray micro-computed tomography
; Biofilms
; nitrate
; oxygen
; biofilm
; concentration (composition)
; geometry
; hydrodynamics
; mass transfer
; morphology
; particle image velocimetry
; pore space
; porous medium
; shear stress
; tomography
; X-ray
; Article
; biofilm
; boundary layer
; carbon source
; electron
; geometry
; hydrodynamics
; micro-computed tomography
; nutrient
; oxygen concentration
; priority journal
; shear stress
; thickness
; three dimensional imaging
; water content
; x-ray computed tomography
; biofilm
; flow kinetics
; growth, development and aging
; hydrodynamics
; mechanical stress
; porosity
; Biofilms
; Hydrodynamics
; Porosity
; Rheology
; Stress, Mechanical
; X-Ray Microtomography
英文摘要: This study investigates the functional correspondence between porescale hydrodynamics, mass transfer, pore structure and biofilm morphology during progressive biofilm colonization of a porous medium. Hydrodynamics and the structure of both the porous medium and the biofilm are experimentally measured with 3D particle tracking velocimetry and micro X-ray Computed Tomography, respectively. The analysis focuses on data obtained in a clean porous medium after 36 h of biofilm growth. Registration of the particle tracking and X-ray data sets allows to delineate the interplay between porous medium geometry, hydrodynamic and mass transfer processes on the morphology of the developing biofilm. A local analysis revealed wide distributions of wall shear stresses and concentration boundary layer thicknesses. The spatial distribution of the biofilm patches uncovered that the wall shear stresses controlled the biofilm development. Neither external nor internal mass transfer limitations were noticeable in the considered system, consistent with the excess supply of nutrient and electron acceptors. The wall shear stress remained constant in the vicinity of the biofilm but increased substantially elsewhere. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112917
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Environmental Engineering, ETH Zürich, Stefano-Franscini-Platz 5, Zürich, 8093, Switzerland; Department of Civil and Environmental Engineering, University of California, Davis, CA, United States; School of Science, RMIT, Melbourne, Australia; Empa, Swiss Federal Laboratories for Materials Science and Technology, Center for X-ray Analytics, Dübendorf, Switzerland; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
Recommended Citation:
Carrel M.,Morales V.L.,Beltran M.A.,et al. Biofilms in 3D porous media: Delineating the influence of the pore network geometry, flow and mass transfer on biofilm development[J]. Water Research,2018-01-01,134