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Aeration for fouling control in Submerged Membrane Bioreactors for wastewater treatment: shear simulation and experimental validations

Braak, Etienne and Schetrite, Sylvie and Anne-Archard, Dominique and Albasi, Claire and Alliet-Gaubert, Marion Aeration for fouling control in Submerged Membrane Bioreactors for wastewater treatment: shear simulation and experimental validations. (2012) In: EuroMembrane Conference 2012, 23 September 2012 - 27 September 2012 (London, United Kingdom).

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Official URL: http://dx.doi.org/10.1016/j.proeng.2012.08.526

Abstract

Aeration for fouling prevention in SMBRs represents a great part of energy consumption of the process. To decrease it a better understanding of the impact of aeration on filtration performances is required. In spite of its beneficial effect (shear stress on membrane surface, turbulences...), the aeration has an impact on a potential destructuration of mixed liquor that could be detrimental to filtration. Our study aims at estimating this impact for SADm and SADp close to those used in full scale plants. To do so work was separated in two main parts: 1) Hydrodynamics characterisation to quantify shear stresses imposed to mixed liquor through Computational Fluid Dynamics (CFD) simulations 2) A pilot campaign to assess experimentally the impact of aeration on mixed liquor parameters. The aim is to link air flowrate (operational parameter) to fouling through local mechanism induced by aeration: shear stresses imposed to mixed liquor and the induced variations of floc size and Extracellular Polymeric Substances (EPS) concentrations.

Item Type:Conference or Workshop Item (Poster)
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF can be found at Procedia Engineering website : http://www.sciencedirect.com/science/article/pii/S1877705812035382 Procedia Engineering. 2012 (44). pp. 674-677. ISSN: 1877-7058
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
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Deposited By: Dominique ANNE ARCHARD
Deposited On:18 Oct 2013 07:24

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