InterPore2022

Session

MS05

31 May 2022, 16:30

51. Mechanisms driving intermittency in preferential flow paths in porous media biofilms

Dorothee Luise Kurz

31/05/2022, 16:30

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Biofilms, surface-attached bacterial communities, are abundant in many environmental and industrial porous media such as soils or filters. Fluid flow through the porous medium affects the biofilm development through shear stress and nutrient supply while in turn the biofilm affects the fluid flow. This interplay can lead to the formation of preferential flow paths (PFPs) through the...

63. Time evolution of biofilm’ permeability field in porous media and control on fluid flow velocities

Joaquin Jimenez-Martinez (EAWAG-ETHZ)

31/05/2022, 16:45

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

In soil ecology, as well as in environmental and industrial applications such as bioremediation and filters, it is of growing importance to understand the interplay between biogeochemical processes and hydrodynamics in porous media. In the latter, microorganisms can form surface-attached communities, known as biofilms. Biofilms lead to bio-clogged pores, which causes modified pore geometries,...

106. Visualizing biofilms within porous media using contrast-enhancing staining agents

Laurenz Schröer (PProGRess-UGCT, Ghent University, Belgium; Center for Microbial Ecology and Technology (CMET), Ghent University, Belgium)

31/05/2022, 17:00

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Bacteria colonize almost every habitat, including porous media such as rocks, sediments and soils. They are usually attached to the surface and agglomerated in biofilms. The location, extent and composition of the biofilm depend on the environmental conditions and chemical and physical characteristics of the material (Miller et al., 2012). They affect the material properties and influence...

482. A novel platform for monitoring and imaging bacterial biofilm growth in complex structures

Mr Christos Papadopoulos (Institut de Mécanique des Fluides de Toulouse (IMFT), Université de Toulouse, CNRS, 31400 Toulouse, France)

31/05/2022, 17:15

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Biofilms are complex microbial communities that grow primarily on solid surfaces where the microorganisms are nested in a self-secreted polymer matrix. Recent experimental studies have aimed at understanding the mechanisms that control the development of biofilms in porous media, including architectural plasticity [1], ecological interactions in connected structures [2] or bio-clogging [3]....

423. Engineering biofilm hydraulic resistance on the microscale

Sam Charlton (ETH Zurich)

31/05/2022, 17:30

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Bacterial biofilms are amongst the most successful modes of life in the terrestrial environment and ubiquitous within porous systems, such as soils and membrane interfaces (1). The bacteria within a biofilm are bound together by self-secreted extracellular polymeric substances (EPS), yielding a natural gel-like structure (2). EPS provides a protective shield and structural architecture to...

503. Microfluidic study of biomass-growth induced changes on hydraulic properties. Investigation of growth characteristics under varying nutrient gas environments.

Patrick Jasek

31/05/2022, 17:45

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Apart from the bacterial instrumentalization for EOR processes, aspiration in utilizing anaerobe archaea representatives for renewable methane synthesis in geological formation exists. In a previous study, the investigation of biomass accumulation in pore-space under saturated flow conditions has shown that bacteria exert a significant change in the hydraulic properties of porous media...

145. Transport of Sporosarcina Pasteurii in porous saturated sands and applications on soil improvement

Dr Guijie Sang (Department of Civil and Environmental Engineering, University of Strathclyde, Glasgow, UK)

01/06/2022, 14:05

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Microbial-induced calcite precipitation (MICP) has been regarded as a promising bio-grouting technique for soil stabilization, remediation of concrete and subsurface rocks, wellbore sealing, among others. One of the most extensively utilized bacteria for MICP is Sporoscarcina pasteurii (S. pasteurii), which enables to catalyze the hydrolysis of urea to carbonate and ammonia via the production...

285. Optimization of injection strategies for field-scale leakage remediation using microbially induced calcite precipitation

Svenn Tveit

01/06/2022, 14:20

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

In large-scale geological storage of CO2 one of the key factors for effective storage capacity is how much one can inject before reaching critical pressure build-ups. If potential leakage paths in the caprock experience pressure value beyond their critical threshold, sequestrated CO2 might leak out of the storage site. Several sealing technologies have been suggested to close leakage paths in...

264. A quantitative study of the effect of pore-scale heterogeneity on MICP in meter-long microfluidic porous media analogues

Mrs Ariadni Elmaloglou (EPFL, Laboratory of Soil Mechanics, Lausanne, 1015, Switzerland)

01/06/2022, 14:35

(MS05) Biochemical processes and biofilms in porous media

Oral Presentation

Microbially-Induced Calcium Carbonate (CaCO3) precipitation (MICP) has a great potential for soil improvement of granular soils as a more environmentally friendly alternative to traditional grouting technologies. The application of MICP in real geotechnical problems requires better engineering control of the spatiotemporal evolution of MICP. Moreover, the optimization of chemical reaction...