MBR-12: Computational fluid dynamics applied on MBR systems
KWB |
04/2006 - 03/2008 |
The slow accumulation of particles in MBR filtration systems that are not hydrodynamically optimised is a bottleneck of many new MBR products entering the market. The optimisation of the system geometry (membranes, modules, aeration, implantation in the reactor, etc) can be undertaken with a lengthy try-and-error process, or more efficiently with modern simulation tools such as those offered by Computer Fluid Dynamics (CFD). However, the development and calibration of such hydrodynamic models requires software, expertise and resources that most of the small and medium enterprises (SME) developing MBR filtration systems cannot afford.
A generic CFD model adapted to MBR conditions (di-phasic with a specific sludge rheology) is still to be defined and calibrated with simple pilot plant tests. This model will be then available to undertake optimisation studies of existing filtration technologies (module and reactor geometry, aerator design, operation conditions etc). Such a model would enable a systemic approach and the identification of the optimal design in the shortest delays, therefore improving the competitiveness of MBR technologies on the market.
In a second phase, attempts could be done to bind the CFD model with a biological ASM-type model in order to improve the precision of the process modelling. Within this research project a secondment to Anjou Recherche, partner of AMEDEUS consortium, and an intense interaction with the expert team on CFD developments are foreseen.