LrgpV1, Main, Exploration, bibRecord, 001B75

Enhancing microfiltration through an inorganic tubular membrane by gas sparging

Identifieur interne : 001B75 ( Main/Exploration ); précédent : 001B74; suivant : 001B76

Enhancing microfiltration through an inorganic tubular membrane by gas sparging

Auteurs : L. Vera [Espagne] ; R. Villarroel [Espagne] ; S. Delgado [Espagne] ; S. Elmaleh [France]

Source :

Journal of Membrane Science [ 0376-7388 ] ; 2000.

RBID : ISTEX:E2DC24BC6E4173C7CAB2B962339958851BD66E1E

Descripteurs français

Wicri :
- topic : Eau usée, Traitement de l'eau.

English descriptors

Abstract

Abstract: A novel technique is tested for reducing tubular mineral membrane fouling by injecting gas into a cross-flow stream. The injected gas is thought to form complex hydrodynamic conditions inside the microfiltration module which increase the wall shear stress, preventing the membrane fouling and enhancing the microfiltration mass transfer. The experimental study was carried out with a ferric hydroxide suspension and a biologically treated wastewater, both of them filtered through a tubular inorganic membrane (Carbosep M14). The sparging led to an increase of the permeate flux with a slug flow structure for the two kinds of suspension. New dimensionless quantities of shear stress number and resistance number were developed by generalized dimensional analysis of steady state flux in sparged and unsparged cross-flow filtration. An unique formalism allowed interpretation of the experimental results both in classical diphasic filtration and with gas sparging. The variation in the dimensionless numbers demonstrated the benefit of gas sparging.

Url:

https://api.istex.fr/document/E2DC24BC6E4173C7CAB2B962339958851BD66E1E/fulltext/pdf

DOI: 10.1016/S0376-7388(99)00216-1

Affiliations:

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to stream Main, to step Curation: 001B75

Le document en format XML

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<author><name sortKey="Villarroel, R" sort="Villarroel, R" uniqKey="Villarroel R" first="R." last="Villarroel">R. Villarroel</name>
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<author><name sortKey="Delgado, S" sort="Delgado, S" uniqKey="Delgado S" first="S." last="Delgado">S. Delgado</name>
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<term>Experimental conditions</term>
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<term>Experimental results</term>
<term>Experimental unit</term>
<term>Ferric</term>
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<term>Ferric hydroxide suspension</term>
<term>Fouling</term>
<term>High proportion</term>
<term>Hydrodynamic regime</term>
<term>Hydrodynamics</term>
<term>Hydroxide</term>
<term>Inorganic membranes</term>
<term>Internal diameter</term>
<term>Irreversible fouling</term>
<term>Largest enhancement</term>
<term>Liquid density</term>
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<term>Mass transfer</term>
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<term>Membrane science</term>
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<term>Nitric acid solution</term>
<term>Other hand</term>
<term>Plateau value</term>
<term>Previous works</term>
<term>Regime excepted</term>
<term>Resistance number</term>
<term>Santa cruz</term>
<term>Santa cruz wastewater treatment plant</term>
<term>Shear stress</term>
<term>Shear stress number</term>
<term>Sparging</term>
<term>Standard methods</term>
<term>Steady state</term>
<term>Stefan layer</term>
<term>Straight line</term>
<term>Straight lines</term>
<term>Taylor bubbles</term>
<term>Transmembrane</term>
<term>Transmembrane pressure</term>
<term>Tubular exchanger</term>
<term>Turbulent regime</term>
<term>Velocity ratio</term>
<term>Vera</term>
<term>Viscous layer</term>
<term>Wall shear stress</term>
<term>Wastewater</term>
<term>Wastewater treatment</term>
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<term>Wastewater treatment plant</term>
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<front><div type="abstract" xml:lang="en">Abstract: A novel technique is tested for reducing tubular mineral membrane fouling by injecting gas into a cross-flow stream. The injected gas is thought to form complex hydrodynamic conditions inside the microfiltration module which increase the wall shear stress, preventing the membrane fouling and enhancing the microfiltration mass transfer. The experimental study was carried out with a ferric hydroxide suspension and a biologically treated wastewater, both of them filtered through a tubular inorganic membrane (Carbosep M14). The sparging led to an increase of the permeate flux with a slug flow structure for the two kinds of suspension. New dimensionless quantities of shear stress number and resistance number were developed by generalized dimensional analysis of steady state flux in sparged and unsparged cross-flow filtration. An unique formalism allowed interpretation of the experimental results both in classical diphasic filtration and with gas sparging. The variation in the dimensionless numbers demonstrated the benefit of gas sparging.</div>
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Enhancing microfiltration through an inorganic tubular membrane by gas sparging

Enhancing microfiltration through an inorganic tubular membrane by gas sparging

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri