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Doctorant (M/F) Material/Process/Food Technology

This offer is available in the following languages:
- Français-- Anglais

Date Limite Candidature : lundi 3 novembre 2025 23:59:00 heure de Paris

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Informations générales

Intitulé de l'offre : Doctorant (M/F) Material/Process/Food Technology (H/F)
Référence : UMR5635-CELPOC-001
Nombre de Postes : 1
Lieu de travail : MONTPELLIER
Date de publication : lundi 13 octobre 2025
Type de contrat : CDD Doctorant
Durée du contrat : 36 mois
Date de début de la thèse : 15 décembre 2025
Quotité de travail : Complet
Rémunération : 2200 € gross monthly
Section(s) CN : 15 - Chimie des matériaux, nanomatériaux et procédés

Description du sujet de thèse

Development of an eco-friendly micro- and ultrafiltration process
for wine clarification and stabilization, based on the synthesis of new eco-friendly membranes and the identification of low-energy filtration conditions.

Context and overall objective of the MIMOeno Project
The wine industry faces many challenges in terms of consumer preferences, international regulations, and climate change, which is causing significant changes in wine. A rethinking of traditional wine stabilization practices is now inevitable. This project aims to offer winegrowers a solution to ensure effective wine stability as early as possible in the winemaking process. Although microfiltration is used for wine clarification and stabilization, the operating conditions (tangential and pressure filtration) have disadvantages, and winemakers remain reluctant to use this overly empirical and non-optimized separation method. MIMOeno is based on the assumption that a membrane configuration that is easier to use and less energy-intensive, but which guarantees the physical and biochemical properties of the wine, could meet winemakers' expectations in terms of clarification and stabilization.
Specific objectives of the MIMOeno project
MIMOeno aims to optimize wine microfiltration by developing hollow fiber membranes immersed in an external-internal suction filtration system, an innovative concept in the agri-food industry. The aim of the project is to demonstrate the feasibility of such a configuration through (i) the synthesis of membranes suitable for wine clarification and stabilization, (ii) the identification and control of clogging mechanisms, and (iii) the evaluation of the biochemical, organoleptic, and microbiological properties of filtered wine. The activities carried out in this thesis work will specifically concern the synthesis and characterization of membranes and the study of the performance of wine filtration using hollow fibers, immersed, in external-internal filtration mode. The preparation of membranes in the form of hollow fibers will incorporate the use of new solvents and bio-based polymers in order to reduce the environmental impact of this chemistry. The discharge into aqueous effluents of intermediate products used for membrane structuring (solvent, porogen agents) will be evaluated and selected based on their toxicity in order to limit their impact. This change in formulation will require the development of a membrane manufacturing process.Filtration tests on real solutions and the study of clogging mechanisms will enable the performance of the synthesized membranes to be evaluated in terms of selectivity and permeability. The lifespan of the membranes and their resistance to washing will also be studied. This stage will be decisive in validating the proposed process, as it will enable its effectiveness to be assessed in terms of membrane separation, durability, and energy consumption.

Contexte de travail

The PhD will be conducted at the European Membrane Institute (IEM, UMR5635, ENSCM, UM, CNRS) under the supervision of Dr. Céline Pochat in collaboration with UMR QualiSud (Sustainable Products and Processes Engineering Team) and co-supervised by Professor Christelle Wisniewski. The IEM is a world-renowned institute in the field of membrane science, with excellent technical support and in-house facilities for membrane manufacturing and characterization. The institute is affiliated with the University of Montpellier, the École Nationale Supérieure d'Ingénieurs de Montpellier, and the CNRS, and is a member of the Pôle Chimie Balard. The PhD is funded by an ANR program (MIMOeno), coordinated by the UMR OEnologie de Bordeaux and involves the IEM, the UMR QualiSud, an industrial equipment manufacturer (SIEBEC), and the Bordeaux Ducourt vineyard.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.