A general description of detachment for multidimensional modelling of biofilms Export

@article{citeulike:1297955, abstract = {A general method for describing biomass detachment in multidimensional biofilm modelling is introduced. Biomass losses from processes acting on the entire surface of the biofilm, such as erosion, are modelled using a continuous detachment speed function Fdet. Discrete detachment events, i.e. sloughing, are implicitly derived from simulations. The method is flexible to allow Fdet to take several forms, including expressions dependent on any state variables such as the local biofilm density. This methodology for biomass detachment was integrated with multidimensional (2D and 3D) particle-based multispecies biofilm models by using a novel application of the level set method. Application of the method is illustrated by trends in the dynamics of biofilms structure and activity derived from simulations performed on a simple model considering uniform biomass (case study I) and a model discriminating biomass composition in heterotrophic active mass, extracellular polymeric substances (EPS) and inert mass (case study II). Results from case study I demonstrate the effect of applied detachment forces as a fundamental factor influencing steady-state biofilm activity and structure. Trends from experimental observations reported in literature were correctly described. For example, simulation results indicated that biomass sloughing is reduced when erosion forces are increased. Case study II illustrates the application of the detachment methodology to systems with non-uniform biomass composition. Simulations carried out at different bulk concentrations of substrate show changes in biofilm structure (in terms of shape, density and spatial distribution of biomass components) and activity (in terms of oxygen and substrate consumption) as a consequence of either oxygen-limited or substrate-limited growth. {\copyright} 2005 Wiley Periodicals, Inc.}, address = {Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands; telephone: +31 (0)15 2781551; fax: +31 (0)15 2782355}, author = {Joao and Picioreanu, Cristian and van Loosdrecht, Mark C. M.}, citeulike-article-id = {1297955}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/bit.20544}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/110502750/ABSTRACT}, doi = {10.1002/bit.20544}, journal = {Biotechnology and Bioengineering}, keywords = {biofilm, detachment, model}, number = {6}, pages = {651--669}, posted-at = {2008-03-13 23:25:02}, priority = {5}, title = {A general description of detachment for multidimensional modelling of biofilms}, url = {http://dx.doi.org/10.1002/bit.20544}, volume = {91}, year = {2005} }

TY - JOUR ID - citeulike:1297955 L3 - citeulike-article-id:1297955 N2 - A general method for describing biomass detachment in multidimensional biofilm modelling is introduced. Biomass losses from processes acting on the entire surface of the biofilm, such as erosion, are modelled using a continuous detachment speed function Fdet. Discrete detachment events, i.e. sloughing, are implicitly derived from simulations. The method is flexible to allow Fdet to take several forms, including expressions dependent on any state variables such as the local biofilm density. This methodology for biomass detachment was integrated with multidimensional (2D and 3D) particle-based multispecies biofilm models by using a novel application of the level set method. Application of the method is illustrated by trends in the dynamics of biofilms structure and activity derived from simulations performed on a simple model considering uniform biomass (case study I) and a model discriminating biomass composition in heterotrophic active mass, extracellular polymeric substances (EPS) and inert mass (case study II). Results from case study I demonstrate the effect of applied detachment forces as a fundamental factor influencing steady-state biofilm activity and structure. Trends from experimental observations reported in literature were correctly described. For example, simulation results indicated that biomass sloughing is reduced when erosion forces are increased. Case study II illustrates the application of the detachment methodology to systems with non-uniform biomass composition. Simulations carried out at different bulk concentrations of substrate show changes in biofilm structure (in terms of shape, density and spatial distribution of biomass components) and activity (in terms of oxygen and substrate consumption) as a consequence of either oxygen-limited or substrate-limited growth. © 2005 Wiley Periodicals, Inc. IS - 6 JF - Biotechnology and Bioengineering AD - Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands; telephone: +31 (0)15 2781551; fax: +31 (0)15 2782355 EP - 669 TI - A general description of detachment for multidimensional modelling of biofilms VL - 91 SP - 651 KW - biofilm KW - detachment KW - model AU - Joao AU - Picioreanu, Cristian AU - van Loosdrecht, Mark PY - 2005/// UR - http://dx.doi.org/10.1002/bit.20544 ER -