Please use this identifier to cite or link to this item: http://hdl.handle.net/11189/3405
Title: The effect of Streptomyces coelicolor development on the hydrodynamics of a vertically orientated capillary membrane gradostat reactor
Authors: Godongwana, Buntu 
De Jager, Debbie 
Sheldon, Marshall S 
Edwards, W 
Keywords: Biofilm hydraulic permeability;Biofilm growth kinetics;Capillary membrane;Membrane gradostat reactor;Modelling;Secondary metabolites;Streptomyces coelicolor
Issue Date: 2009
Publisher: Elsevier
Source: Godongwana, B., De Jager, D., Sheldon, M. S., & Edwards, W. (2009). The effect of Streptomyces coelicolor development on the hydrodynamics of a vertically orientated capillary membrane gradostat reactor. Journal of Membrane Science, 333(1), 79-87.
Abstract: An empirical correlation for the effect of a Streptomyces coelicolor biofilm on hydraulic permeability is presented. This relation was based on a two-phase logistic fit of the biofilm growth kinetics, taking into account uneven growth of the biofilm. The model was applied to a vertically orientated, pressure-controlled, membrane gradostat reactor (MGR) operated in the dead-end mode. The permeability correlation developed was further used in the investigation of the effect of bacterial growth on velocity and pressure profiles of the nutrient solution in the lumen of the MGR. The velocity profiles emanating from the application of the model were in correspondence with the observed flux decline in the pressure-controlled MGRs. The hydrostatic pressure profiles pointed to the existence of a critical hydraulic permeability of the biofilm, below which there is recirculation of the nutrient solution back to the membrane lumen. Even at hydraulic permeabilities much higher than the predicted crit, this recirculation was marked by the existence of the secondary metabolite, actinorhodin, in the lumen of the MGR.
Description: Godongwana. B., de Jager. D., Sheldon. M. S., & Edwards. W., (2009). The effect of Streptomyces coelicolor development on the hydrodynamics of a vertically orientated capillary membrane gradostat reactor. Journal of Membrane Science, 333(1), 79-87. DOI: http://dx.doi.org/10.1016/j.memsci.2009.01.051
URI: http://dx.doi.org/10.1016/j.memsci.2009.01.051
http://hdl.handle.net/11189/3405
Appears in Collections:Eng - Journal articles (DHET subsidised)

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