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Titolo:
The effect of oscillatory flow on crossflow microfiltration of beer in a tubular mineral membrane system - Membrane fouling resistance decrease and energetic considerations
Autore:
Blanpain-Avet, P; Doubrovine, N; Lafforgue, C; Lalande, M;
Indirizzi:
InsteneuveSci Appl, Lab Genie Procedes & Technol Alimentaires, F-59651 Vill Inst Natl Sci Appl Villeneuve Dascq France F-59651 ntaires, F-59651 Vill INRA,F-31077atl Sci Appl, Dept Genie Biochim & Alimentaire, UMR CNRS 5504,INRA Toulouse France 4 Dept Genie Biochim & Alimentaire, UMR CNRS 5504,
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 2, volume: 152, anno: 1999,
pagine: 151 - 174
SICI:
0376-7388(19990120)152:2<151:TEOOFO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUX ENHANCEMENT; CONCENTRATION-POLARIZATION; PULSATILE FLOW; PERMEATE FLUX; FILTRATION; ULTRAFILTRATION; PRESSURE; MECHANISMS; BLOOD;
Keywords:
oscillatory flow; beer microfiltration; tubular mineral membrane; membrane fouling resistance; energy consumption;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Blanpain-Avet, P InstsNatl Sci Appl, Lab Genie Procedes & Technol Alimentaires, 369 Rue Jule Inst Natl Sci Appl 369 Rue Jules Guesde,BP 39 VilleneuveDascq France F-59651
Citazione:
P. Blanpain-Avet et al., "The effect of oscillatory flow on crossflow microfiltration of beer in a tubular mineral membrane system - Membrane fouling resistance decrease and energetic considerations", J MEMBR SCI, 152(2), 1999, pp. 151-174

Abstract

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 composedof 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 yeastcell 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 Delta P>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 m(3) of permeate) related to the kinetic energy applied to fluid in oscillatory and steady flow modes, the system by gas compression in oscillatory how 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. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 08/07/20 alle ore 07:33:50