The effect of oscillatory flow on crossflow microfiltration of beer in a tubular mineral membrane system - membrane fouling resistance decrease and energetic considerations
| Autor: | N. Doubrovine, C. Lafforgue, Pascal Blanpain-Avet, M. Lalande |
|---|---|
| Přispěvatelé: | Laboratoire de Génie des Procédés et Technologie Alimentaires (LGPTA), Institut National de la Recherche Agronomique (INRA), Unité mixte de recherche biotechnologies bioprocédés, Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Microfiltration
Flow (psychology) Filtration and Separation 02 engineering and technology 7. Clean energy Biochemistry law.invention Cross-flow filtration Physics::Fluid Dynamics 020401 chemical engineering law General Materials Science 0204 chemical engineering Physical and Theoretical Chemistry Filtration ComputingMilieux_MISCELLANEOUS Chromatography Fouling Chemistry Membrane fouling Mechanics 021001 nanoscience & nanotechnology 6. Clean water Volumetric flow rate [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry Molecular Biology/Biophysics Membrane 13. Climate action 0210 nano-technology |
| Zdroj: | Journal of Membrane Science Journal of Membrane Science, Elsevier, 1999, 152 (2), pp.151-174 Journal of Membrane Science, 1999, 152 (2), pp.151-174 |
| ISSN: | 0376-7388 |
| Popis: | We have investigated the consequences due to the changes in hydrodynamics above the membrane surface brought about by an oscillatory flow in the crossflow microfiltration (CFMF) of beer on a tubular mineral membrane. Experimental results in oscillatory flow filtration were analysed in terms of membrane resistance to filtration and energy consumption and compared with steady flow filtration. Two types of beers were used: a clarified beer composed of colloids and macromolecular material and a rough beer containing in addition yeast cells. Oscillatory flow was found to decrease membrane fouling resistance (up to 100%) in rough beer filtration in the presence of a yeast cell cake layer on the membrane surface, whereas it has no effect in clarified beer filtration in the presence of membrane clogging. The detrimental effect of transmembrane pressure on membrane resistance (at ΔP>1 bar) has been emphasized in both oscillatory and steady flows. The time-average hydraulic power dissipated by friction in the filtration module, in relation with the absolute value of the time-average flow rate in oscillatory flow, was found to be systematically higher than for steady flow filtration. However, the hydraulic energy per unit volume of permeate in the microfiltration of rough beer under oscillatory flow was close to that in steady flow at a time-average tangential velocity of 3 m/s. By considering the specific energy (per m3 of permeate) related to the kinetic energy applied to fluid in oscillatory and steady flow modes, the system by gas compression in oscillatory flow led to a reduction of specific energy ranging from 15% to 40%. Finally the ratio of hydraulic power consumed in oscillatory and steady flow was compared with a theoretical calculation based on the assumption that the oscillating flow regime is quasi-steady. |
| Databáze: | OpenAIRE |
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