Modelling of submerged membrane bioreactor: Conceptual study about link between activated slugde biokinetics,aeration and fouling process |
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Authors: | Alain Zarragoitia-Gonzá lez,Sylvie Schetrite,Marion Alliet,Ulises Já uregui-Haza,Claire Albasi |
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Affiliation: | 1. Laboratoire de Génie Chimique, CNRS - UMR 5503, 5 rue Paulin Talabot, BP 1301, 31106 Toulouse, France;2. Departamento de Desarrollo Tecnológico, Centro de Química Farmacéutica (CQF), Calle 200 y 21, Apdo. 16042, Atabey, Playa. La Habana, Cuba |
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Abstract: | A mathematical model was developed to simulate filtration process and aeration influence on submerged membrane bioreactor (SMBR) in aerobic conditions. The biological kinetics and the dynamic effect of the sludge attachment and detachment from the membrane, in relation to the filtration and a strong intermittent aeration, were included in the model. The model was established considering soluble microbial products (SMP) formation-degradation. The fouling components responsible of pore clogging, sludge cake growth, and temporal sludge film coverage were considered during calculation of the total membrane fouling resistance. The influence of SMP, transmembrane pressure, and mixed liquor suspended solids on specific filtration resistance of the sludge cake was also included. With this model, the membrane fouling under different SMBR operational conditions can be simulated. The influence of a larger number of very important process variables on fouling development can be well quantified. The model was developed for evaluating the influence on fouling control of an intermittent aeration of bubbles synchronized or not with the filtration cycles, taking into account the effects of shear intensity on sludge cake removal. |
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Keywords: | Biological wastewater treatment Filtration resistance Submerged membrane bioreactor (SMBR) Membrane fouling MBR modelling |
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