Modelling biofilm-induced formation damage and biocide treatment in subsurface geosystems.
Bottom Line: Persisters describe small subpopulation of cells which are tolerant to biocide treatment.Biofilm tolerance to biocide treatment is regulated by persister cells and includes 'innate' and 'biocide-induced' factors.Also, a successful application of biological permeability conformance treatment involving geologic layers with flow communication is more complicated than simply engineering the attachment of biofilm-forming cells at desired sites.
Affiliation: Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada. firstname.lastname@example.orgShow MeSH
Related in: MedlinePlus
Mentions: where Y is the yield coefficient (i.e. the ratio of biomass produced per unit of substrate consumed), λ+ is microbial specific growth rate, Es is an affinity constant (i.e. the substrate concentration supporting one-half the maximum growth or nutrient uptake rate), and ϕv is the non-persister cell concentration (mass per unit pore volume). Nutrient consumption results in biofilm growth and accumulation. To avoid instabilities resulting from discretization of the governing equations, the time step is chosen to be equal to Δt = V/qmax; this denotes the global minimum time for flow between nodes in the network. The overall algorithm, presented in Fig. 3, consists of an iterative sequence to simulate biofilm evolution under flow conditions in interconnected porous media.
Affiliation: Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada. email@example.com