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     <dc:title xml:lang="fr">Étude du couplage en cascade ozonation-nanofiltration ou osmose inverse basse pression : contribution expérimentale et simulation du transport membranaire</dc:title>
     <dcterms:alternative xml:lang="en">Study of ozonation-nanofiltration or low-pressure reverse osmosis cascade coupling process : experimental contribution and simulation of membrane transport</dcterms:alternative>
     <dc:subject xml:lang="fr">Nanofiltration</dc:subject><dc:subject xml:lang="fr">osmose inverse basse pression</dc:subject><dc:subject xml:lang="fr">ozonation</dc:subject><dc:subject xml:lang="fr">colmatage</dc:subject><dc:subject xml:lang="fr">micropolluants</dc:subject><dc:subject xml:lang="fr">simulation</dc:subject>
     <dc:subject xml:lang="en">Nanofiltration</dc:subject><dc:subject xml:lang="en">low-pressure reverse osmosis</dc:subject><dc:subject xml:lang="en">ozonation</dc:subject><dc:subject xml:lang="en">membrane fouling</dc:subject><dc:subject xml:lang="en">micropollutants</dc:subject><dc:subject xml:lang="en">modeling and simulation</dc:subject><tef:sujetRameau><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="084765054">Nanofiltration</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="032021054">Osmose inverse</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027719650">Micropolluants</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Cette thèse est consacré à étudier l’impact de la pré-ozonation sur l’élimination des micropolluants d’intérêt et la réduction du colmatage dans deux filières membranaires pour le traitement de l’eau potable de VEOLIA. Nos résultats ont montré tout d’abord que les micropolluants d’intérêt choisis sont relativement récalcitrants à l’ozone, et que la pré-ozonation n’exerce pas d’impact significatif sur l’amélioration de l’élimination de ces micropolluants par la membrane de NF assez ouverte (1000 Da), ni par la membrane d’OIBP. Cependant l’impact de la matière organique présente dans la matrice étudiée a été remarquée qui pourrait jouer un rôle important sur le passage des micropolluants à travers la membrane.Ensuite, une influence importante a été observée dans l’expérience de l’OIBP, où la pré-ozonation a considérablement modifié le colmatage organique de la membrane. Cela s’est manifesté par une diminution de l’augmentation de la pression transmembranaire à flux constant au cours de l’augmentation du FRV, ainsi que par une réduction de la résistance irréversible observée. D’autre part, le modèle SEDE a montré des performances relativement satisfaisantes sur la prédiction des concentrations des ions et des micropolluants dans le perméat sur un essai de NF de l’eau naturelle. La surestimation de la concentration du perméat de certains micropolluants a suggéré aussi l’impact de la matière organique, ce qui n’est pas pris en compte dans le modèle.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">This thesis is devoted to studying the impact of pre-ozonation on the removal of micropollutants of interest and the mitigation of membrane fouling in two VEOLIA drinking water treatment by membrane systems. Our results showed firstly that the selected micropollutants are relatively recalcitrant to ozone, and that pre-ozonation has no significant impact on improving the removal of these micropollutants by the fairly open NF membrane (1000 Da), nor by the OIBP membrane. However, the impact of the organic matter present in the matrix was noted, which could play an important role in the passage of micropollutants through the membrane. Secondly, a significant influence was observed in the OIBP experiment, where pre-ozonation significantly modified organic membrane fouling. This was manifested by a decrease in the transmembrane pressure increasing at constant flux during FRV increase, as well as a reduction in the observed irreversible resistance. On the other hand, the SEDE model showed relatively satisfactory performance in predicting ion and micropollutant concentrations in the permeate for a natural water NF test. The overestimation of the permeate concentration of some micropollutants also suggested the impact of organic matter, which is not taken into account in the actual model.</dcterms:abstract>
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