Cristin-resultat-ID: 1938443
Sist endret: 27. september 2021, 18:38
Resultat
Poster
2018

Mathematical modelling of bacterial growth at different scales: numerical simulations and laboratory experiments

Bidragsytere:
  • David Landa-Marbán
  • Na Liu
  • Sorin Iuliu Pop
  • Kundan Kumar
  • Per Pettersson
  • Gunhild Bødtker
  • mfl.

Presentasjon

Navn på arrangementet: 2018 Annual Meeting of the Society for Mathematical Biology & the Japanese Society for Mathematical Biology
Sted: Sydney
Dato fra: 8. juli 2018
Dato til: 12. juli 2018

Arrangør:

Arrangørnavn: Society for Mathematical Biology/The Japanese Society for

Om resultatet

Poster
Publiseringsår: 2018

Klassifisering

Vitenskapsdisipliner

Anvendt matematikk

Emneord

Matematisk moellering og numeriske metoder

Beskrivelse Beskrivelse

Tittel

Mathematical modelling of bacterial growth at different scales: numerical simulations and laboratory experiments

Sammendrag

Biofilms are sessile communities of bacteria housed in a self-produced adhesive matrix consisting of extracellular polymeric substances (EPS), including polysaccharides, proteins, lipids, and DNA. [1]. Biofilm provokes chronic bacterial infection, infection on medical devices, deterioration of water quality, and the contamination of food [2]. On the other hand, biofilm can be used for wastewater treatment and bioenergy production [3]. In microbial enhanced oil recovery (MEOR), one of the strategies is selective plugging, where bacteria are used to form biofilm in the high permeable zones to diverge the water flow and extract the oil located in the low permeable zones [4]. Therefore, it is necessary to build mathematical models that better describe the biofilm mechanisms. One of the motivations to derive upscaled models is to describe the averaged behaviour of the system in an accurate manner with relatively low computational effort compared to fully detailed calculations starting at the microscale [5]. In the laboratory, biofilm is growth in a T-shape micro-channel. We built a mathematical model including water flux inside the biofilm and different biofilm components (EPS, water, active bacteria, and dead bacteria). Using the best estimate of physical parameters from the existing experiments, we perform numerical simulations. The stress coefficient is selected to match the experimental results. A sensitivity analysis is performed to identify the critical model parameters. A reduction of the biofilm coverage area as the water flux velocity increases is observed. Homogenization techniques are applied in a strip and a tube geometry. Numerical simulations are performed to compare both upscaled mathematical models. [1] Aggarwal, S., Stewart, P. S., Hozalski, R. M. (2015). Biofilm Cohesive Strength as a Basis for Biofilm Recalcitrance: Are Bacterial Biofilms Overdesigned? Microbiology Insights. 8s2, MBI.S31444. [2] Kokare, C. R., Chakraborty, S., Khopade, A. N., Mahadik, K. R (2009). Biofillm: Importance and applications. Indian J. Biotechnol. 8, 159-168. [3] Miranda, A. F. et al. (2017). Applications of microalgal biofilms for wastewater treatment and bioenergy production. Biotechnol. Biofuels. 10, 120. [4] Raiders, R. A., Knapp, R. M., McInerney, M. J. (1989). Microbial selective plugging and enhanced oil recovery. J. Ind. Microbiol. 4(3), 215-229. [5] van Noorden, T. L., Pop, I. S., Ebigbo, A., Helmig, R. (2010). An upscaled model for biofilm growth in a thin strip. Water Resour. Res. 46, W06505.

Bidragsytere

Aktiv cristin-person

David Landa Marban

Bidragsyterens navn vises på dette resultatet som David Landa-Marbán
  • Tilknyttet:
    Forfatter
    ved Universitetet i Bergen

Na Liu

  • Tilknyttet:
    Forfatter
    ved NORCE Energi og teknologi ved NORCE Norwegian Research Centre AS

Sorin Iuliu Pop

  • Tilknyttet:
    Forfatter
    ved Universiteit Hasselt

Kundan Kumar

  • Tilknyttet:
    Forfatter
    ved Matematisk institutt ved Universitetet i Bergen

Per Pettersson

  • Tilknyttet:
    Forfatter
    ved NORCE Energi og teknologi ved NORCE Norwegian Research Centre AS
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