Journal ArticleDOI
Observation of thick biofilm accumulation and structure in porous media and corresponding hydrodynamic and mass transfer effects
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A series of flat plate, porous media reactor studies was performed to characterize the development and structure of thick biofilms in porous media and the subsequent effects on porous media hydrodynamics and mass transport variables including average pore velocity, hydrodynamic dispersivity, and (dye tracer) breakthrough curve features as mentioned in this paper.About:
This article is published in Water Science and Technology.The article was published on 1999-01-01. It has received 63 citations till now. The article focuses on the topics: Biofilm matrix & Porous medium.read more
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Applications of microorganisms to geotechnical engineering for bioclogging and biocementation of soil in situ
Volodymyr Ivanov,Jian Chu +1 more
TL;DR: The aim of these applications is to improve the mechanical properties of soil so that it will be more suitable for construction or environmental purposes, and two notable applications, bioclogging and biocementation, have been explored.
Journal ArticleDOI
Comparison of bioclogging effects in saturated porous media within one- and two-dimensional flow systems
TL;DR: In this article, the experimental results obtained for one-and two-dimensional flow fields and compared the modeling results obtained using different conceptualizations of the pore space are presented. But, the results of these studies are not straight-forward to extrapolate them to multidimensional flow fields.
Journal ArticleDOI
Interaction between water flow and spatial distribution of microbial growth in a two-dimensional flow field in saturated porous media
TL;DR: The ability of the biomass to change the flow pattern in the flow cell was observed, indicating that the biomass was locally reducing the hydraulic conductivity of the porous medium, which caused the observed bioclogging effects.
Journal ArticleDOI
Hierarchical simulator of biofilm growth and dynamics in granular porous materials
TL;DR: In this article, a new simulator is developed for the prediction of the rate and pattern of growth of biofilms in granular porous media, where the biofilm is considered as a heterogeneous porous material that exhibits a hierarchy of length scales.
Journal ArticleDOI
Use of tracer tests to investigate changes in flow and transport properties due to bioclogging of porous media.
Dorte Seifert,Peter Engesgaard +1 more
TL;DR: Numerical simulations suggest that local dispersivity values may be as much as 40 times higher in the more severe clogged areas inside the column, and the bulk hydraulic conductivity and dispersivity parameters were almost recovered after disinfection of the columns.
References
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Journal ArticleDOI
The involvement of cell-to-cell signals in the development of a bacterial biofilm
David G. Davies,Matthew R. Parsek,Matthew R. Parsek,Matthew R. Parsek,James P. Pearson,James P. Pearson,James P. Pearson,Barbara H. Iglewski,Barbara H. Iglewski,Barbara H. Iglewski,J. W. Costerton,J. W. Costerton,J. W. Costerton,E. P. Greenberg,E. P. Greenberg,E. P. Greenberg +15 more
TL;DR: The involvement of an intercellular signal molecule in the development of Pseudomonas aeruginosa biofilms suggests possible targets to control biofilm growth on catheters, in cystic fibrosis, and in other environments where P. aerug inosaBiofilms are a persistent problem.
Journal ArticleDOI
AQUASIM-a tool for simulation and data analysis of aquatic systems
TL;DR: A survey over the capabilities of a new simulation and data analysis program for laboratory, technical and natural aquatic systems is given that provides methods for system identification (sensitivity analysis and automatic parameter estimation) and allows us to estimate the uncertainty of calculated results.
Journal ArticleDOI
Liquid flow in biofilm systems.
TL;DR: A model biofilm consisting of Pseudomonas aeruginosa, pseudomonas fluorescens, and Klebsiella pneumoniae was developed to study the relationships between structural heterogeneity and hydrodynamics.
Journal ArticleDOI
Influence of Biofilm Accumulation on Porous Media Hydrodynamics
TL;DR: Observations of permeability in the biofilm-media matrix indicate that a minimum permeability persisted after biofilm thickness has reached a maximum value, which indicates substantial interaction between mass transport, hydrodynamics, and biofilm accumulation at the fluid-biofilm interface in porous media.
Journal ArticleDOI
Biofilm growth and the related changes in the physical properties of a porous medium: 1. Experimental investigation
Stewart W. Taylor,Peter R. Jaffé +1 more
TL;DR: In this article, an experimental investigation was conducted to quantify the permeability reduction caused by enhanced biological growth in a porous medium, and the results showed that a limit on the amount of porosity reduction exists, having a magnitude of 5 × 10−4 in the present study.
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Biofilm growth and the related changes in the physical properties of a porous medium: 1. Experimental investigation
Stewart W. Taylor,Peter R. Jaffé +1 more