Bacterial transport in porous media: New aspects of the mathematical model

Sen, Tushar Kanti; Das, Dipankar; Khilar, Kartic C.; Suraishkumar, G. K.

doi:10.1016/j.colsurfa.2005.02.033

Cited by 45 publications

(29 citation statements)

References 36 publications

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“…McCarthy and McKay [18] and Sen et al [122] mentioned in their article that there is a substantial body of published research on microbial transport in the subsurface, much of it focuses on transport in the saturated zone [119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134]. Transport of bacteria in porous media is mainly bounded with small scale batch and column studies.…”

Section: Biocolloids Transportmentioning

confidence: 99%

“…Not only are they subject to same physicochemical phenomena as are colloids [17] but they are also a number of strictly biological processes that affect their transport. Investigators identified several environmental factors such as cell concentration, substrate concentration, captured to and release from the porous medium surfaces, growth and inactivation, chemotaxis and advection and dispersion [122,132] which have strong effects on bacterial fate and transport in porous media.…”

Section: Biocolloids Transportmentioning

confidence: 99%

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Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Sen

Khilar

2006

Advances in Colloid and Interface Science

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383

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Section: Biocolloids Transportmentioning

confidence: 99%

Section: Biocolloids Transportmentioning

confidence: 99%

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Sen

Khilar

2006

Advances in Colloid and Interface Science

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383

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“…Bacteria and substrate are continuously injected into the reservoir with the same rate. In the literature related to both enhanced oil recovery and wastewater treatment, many different injection concentrations are used ranging from 10 −5 to 10 kg of substrate per cubic meter [10,14,56,59,61]. We have chosen a substrate mass fraction from the higher concentration range.…”

Section: Parameters and Initial Conditionsmentioning

confidence: 99%

Microbial enhanced oil recovery—a modeling study of the potential of spore-forming bacteria

2015

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Microbial enhanced oil recovery (MEOR) utilizes microbes for enhancing the recovery by several mechanisms, among which the most studied are the following: (1) reduction of oil-water interfacial tension (IFT) by the produced biosurfactant and (2) selective plugging by microbes and metabolic products. One of the ways of bacterial survival and propagation under harsh reservoir conditions is formation of spores. A model has been developed that accounts for bacterial growth, substrate consumption, surfactant production, attachment/filtering out, sporulation, and reactivation. Application of spore-forming bacteria is an advantageous novelty of the present approach. The mathematical setup is a set of 1D transport equations involving reactions and attachment. Characteristic sigmoidal curves are used to describe sporulation and reactivation in response to substrate concentrations. The role of surfactant is modification of the relative permeabilities by decreasing the interfacial tension. Attachment of bacteria reduces the pore space available for flow, i.e., the effective porosity and permeability. Clogging of specific areas may occur. An extensive study of the MEOR on the basis of the developed model has resulted in the following conclusions. In order to obtain sufficient local concentrations of surfactant, substantial amounts of substrate should be supplied; however, massive growth of bacteria increases the risk for clogging at the well inlet areas, causing injectivity loss. In such areas, starvation may cause sporulation, reducing the risk of clogging. Substrate released during sporulation can be utilized by attached vegetative bacteria and they will continue growing and producing surfactant, which prolongs the effect of the injected substrate. The simulation scenarios show that application of the spore-forming bacteria gives a higher total production of surfactant and the reduced risk of clogging, leading to an increased period of production and a higher oil recovery.

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“…Numerical simulations [3,15,19] demonstrated that the pore surface retention and microbial plugging in the porous media were important to microbial transport processes. Microbial chemotaxis, which was neglected in many works, also plays a significant role in microbial transport, especially under the lower water flow rate [16].…”

Section: Introductionmentioning

confidence: 99%

Modeling of microorganisms transport in a cylindrical pore

Gang

Liu

2008

J Ind Microbiol Biotechnol

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A mathematical model accounting for key parameters as microbial propagation, metabolite formation, dispersion, microbial chemotaxis and water flooding has been proposed to simulate the transport of microorganisms and their metabolites in a cylindrical pore with oil adhered to its inside surface. The model focuses on the transport and the concentration distributions of microorganisms and their metabolites in the cylindrical pore, especially the concentrations that on the oil-water interface. Results from the present model indicate that microorganisms and their metabolites assembled on the oil-water interface during the water flooding process, and the concentration gradients of microorganisms and their metabolites from the pore center region up to the oil-water interface in radial direction of the cylindrical pore were consequently formed. Equilibrium concentrations of microorganisms and their metabolites in the cylindrical pore were obtained when water flow rate within a certain scope, and there existed a critical water flow rate at which the maximum equilibrium concentration of microorganisms on the oil-water interface was developed. Investigations carried out in this study may provide better understanding on the transport mechanism of microorganisms in porous media.

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Bacterial transport in porous media: New aspects of the mathematical model

Cited by 45 publications

References 36 publications

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Review on subsurface colloids and colloid-associated contaminant transport in saturated porous media

Microbial enhanced oil recovery—a modeling study of the potential of spore-forming bacteria

Modeling of microorganisms transport in a cylindrical pore

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