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<dc:title xml:lang="fr">Valorisation des effluents liquides de l'industrie oléicole pour une oléiculture durable et respectueuse de l'environnement</dc:title>
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<dc:subject xml:lang="fr">Margines</dc:subject>
<dc:subject xml:lang="fr">Polyphénols</dc:subject>
<dc:subject xml:lang="fr">Filtration membranaire</dc:subject>
<dc:subject xml:lang="fr">Caractérisation du colmatage</dc:subject>
<dc:subject xml:lang="fr">Valorisation</dc:subject>
<dc:subject xml:lang="fr">Bioherbicide</dc:subject>
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<dc:subject xml:lang="en">Polyphenols</dc:subject>
<dc:subject xml:lang="en">Membrane filtration</dc:subject>
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<dcterms:abstract xml:lang="fr">Les procédés d’extraction d’huile d’olive génèrent d’énormes quantités de déchets liquides (margines) pendant la saison de l’extraction de l’huile d’olives. Ces déchets représentent un grand défi pour les producteurs d'huile d'olive car ils doivent trouver des solutions techniques, environnementales et économiques pour gérer ces sous-produits. La valorisation des composés biologiques des margines constitue l’une des clés permettant de résoudre la problématique de gestion de ces effluents. Aussi il est plus judicieux de les traiter non pas comme un effluent toxique de l’industrie oléicole mais comme un sous-produit nécessitant l’installation d’une filière structurée offrant un avenir prometteur. Dans ce contexte, l'objectif principal de cette thèse était d'explorer et de proposer un cycle complet de traitement des déchets de l’extraction de l’huile d’olives. Cette démarche s'inscrit dans le cadre d'une approche zéro rejet liquide et déchets et promeut le concept d'économie circulaire. Une approche innovante et durable intégrant un processus complet est mise en place, comportant i) un prétraitement et une concentration des composés phénoliques/fractionnement par des technologies éco-compatibles d’ultra et nanofiltration (UF et NF), ii) une étude de transfert de matière et les phénomènes de colmatage impliqués lors de la de filtration et iii) une stratégie de valorisation agroécologique des fractions générées.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Olive oil extraction processes generate considerable amounts of liquid olive mil wastewater (OMW) during the olive oil extraction season. This waste represents a great challenge for olive oil producers, as it requires technical, environmental and economical solutions to manage these by-products. The valorization of the biological compounds of OMW constitutes one of the keys to solve the problem of the management of these effluents. In this context, the main objective of this thesis was to explore and propose a complete cycle of treatment of olive oil extraction waste. This approach is in the framework of zero liquid discharge and waste and promotes the concept of circular economy. An innovative and sustainable approach integrating a complete process was set up, including i) a pre-treatment and concentration of phenolic compounds/fractionation by eco-compatible technologies of ultra and nanofiltration (UF and NF), ii) a study of material transfer and fouling phenomena involved during the filtration and iii) a strategy of agro-ecological valorisation of the fractions generated.</dcterms:abstract>
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