Biofilms in 3D porous media: Delineating the influence of the pore network geometry, flow and mass transfer on biofilm development

Abstract

Please cite this article as: Carrel, M., Morales, Veró.L., Beltran, M.A., Derlon, N., Kaufmann, R., Morgenroth, E., Holzner, M., Biofilms in 3D porous media: Delineating the influence of the pore network geometry, flow and mass transfer on biofilm development, Water Research (2018Research ( ), doi: 10.1016Research ( / j.watres.2018 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. in the considered system, consistent with the excess supply of nutrient and electron acceptors. 50The wall shear stress remained constant in the vicinity of the biofilm but increased 51 substantially elsewhere.

Pore‐Scale Hydrodynamics in a Progressively Bioclogged Three‐Dimensional Porous Medium: 3‐D Particle Tracking Experiments and Stochastic Transport Modeling

“…The structural changes that lead to increased flow heterogeneity also affect the average flow properties through a gradual reduction of permeability, which, however, decreases more sharply than porosity (see Table and compare relative values of k / k ( t = 0) and ). This indicates a gradual reduction of pore connectivity due to bioclogging (Carrel et al, ).…”

Review of the use of microorganisms in geotechnical engineering applications

“…Wiszniewski [155] reported a reduction in the hydraulic conductivity when two different samples of sandy soils were treated with 0.1-1.5% xanthan gum from the bacterial species Xanthomonas campestris; the reductions recorded were from 7.16 × 10 −3 to 5.75 × 10 −5 m/s and from 8.46 × 10 −3 to 2.84 × 10 −11 m/s for the two samples, respectively. Some species of the organisms used in MICP processes have the potential to form a biomass or biofilm: these substances have been reported to be linked with factors responsible for the reduction in the hydraulic conductivity, in addition to blockage of voids in the soil medium by calcite precipitate [152,153,156].…”

Colloid transport through soil and other porous media under transient flow conditions—A review

“…Synchrotron radiation X‐ray fluorescence has been used to measure the in situ colloid concentration and moisture content in soil column experiments (DiCarlo et al, 2006). More recently, X‐ray computed tomography (CT) has been used to extract macropore networks in soil columns (Carrel et al, 2017, 2018; Soto‐Gómez, Pérez‐Rodríguez, Vázquez‐Juiz, López‐Periago, & Paradelo, 2018) allowing to link the characteristics of the extracted macropore networks to the transport characteristics of colloids. Development and wider application of existing as well as new techniques such as the 19‐port sampling system by Mohanty, Bulicek, et al (2015) (Figure 6) to visualize and measure in situ moisture content and colloid concentration in porous media (Crist et al, 2004; DiCarlo et al, 2006; Keller & Auset, 2007; Soto‐Gómez et al, 2018, 2019), and to differentiate different flow pathways and colloid attachment sites (Auset & Keller, 2006; Baumann & Werth, 2004; Lanning & Ford, 2002; Zhang, Hassanizadeh, Liu, Schijven, & Karadimitriou, 2014) offer promising methods and technologies to advance understanding of the fate and transport of colloids in transient flow systems.…”