Journal
TRANSPORT IN POROUS MEDIA
Volume 110, Issue 3, Pages 345-367Publisher
SPRINGER
DOI: 10.1007/s11242-015-0546-1
Keywords
Pore-network (PN) modeling; Biofilm growth and clogging; Permeability reduction; Non-equilibrium mass exchange; Numerical simulation
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Funding
- Dutch Technology Foundation STW
- Netherlands Organisation for Scientific Research (NOW)
- Ministry of Economic Affairs
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In this work, a pore-network (PN) model for solute transport and biofilm growth in porous media was developed. Compared to previous studies of biofilm growth, it has two new features. First, the constructed pore network gives a better representation of a porous medium. Second, instead of using a constant mass exchange coefficient for solute transport between water phase and biofilm, a variable coefficient as a function of biofilm volume fraction and Damkohler number was employed. This PN model was verified against direction simulations. Then, a number of case studies were conducted, in order to illustrate the temporal evolutions of medium permeability and biomass content under different operating conditions. Finally, we explored the effects of biofilm morphology and permeability on biofilm growth, as well as non-unique relationship between medium permeability reduction and its porosity change.
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