Aeration and hydrodynamics in submerged membrane bioreactors
| Autor: | Sylvie Schetrite, Marion Alliet, Claire Albasi, Etienne Braak |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Engineering
Fouling Submerged membrane bioreactor business.industry Membrane fouling Environmental engineering Filtration and Separation Membrane bioreactor Biochemistry law.invention Activated sludge law Energy saving Bioreactor Hydrodynamics Génie chimique Aeration General Materials Science Sewage treatment Physical and Theoretical Chemistry Process engineering business Filtration |
| Popis: | Membrane bioreactor (MBR) is already a well-developed wastewater treatment process for both municipal and industrial applications. Nonetheless, membrane fouling remains a significant problem for its wider development. In the case of submerged membrane bioreactors (SMBRs), one of the most efficient strategies to limit fouling is the use of a gas/liquid two-phase flow to enhance the mass transfer. However, the effect of aeration still remains incompletely understood. The complexity of flows and of the nature of activated sludge makes a theoretical approach difficult. Aeration is the source of a large part of the operating costs in most industrial scale plants and its optimization is a necessity to make the process really efficient. This paper first deals with hydrodynamics in MBRs, then it reviews the parameters of aeration and their impact on filtration performance. Finally, the effects of aeration mechanisms on biological media are described. |
| Databáze: | OpenAIRE |
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