By-products of the food industry, currently considered as waste, are sources of molecules of interest and could be valorized by extracting these functional biomolecules. The extracts obtained can be used as food or cosmetic ingredients. To extract these biomolecules, innovative “green” processes are used to obtain better extraction yields using less time, safe solvents, less energy and generating less environmental impacts. However, these processes are studied mainly in batch mode on relatively small volumes at the laboratory scale. In order to prepare the realization of green extractions on higher TRL levels (pilot, industrial), the PhD thesis project aims to study the efficiency of different green extraction processes for the recovery of antioxidants from by-products from regional food industry while working in continuous mode. Three green extraction processes will be studied: ultrasound-assisted extraction, microwave-assisted extraction, and the extraction simultaneously assisted by microwaves and ultrasounds. The performance of these processes (extraction yields, activity of the extracts, energy consumed, and environmental impacts) in batch and continuous modes will be evaluated by seeking the optimal conditions for antioxidants recovery from large volumes of by-products.
Laboratory: UMR-T 1158 BioEcoAgro, Charles Viollette Institute
We are looking for a candidate who has validated an engineering training or a 2R master's degree. The candidate should have training in the fields of biochemical sciences and/or process engineering. The candidate should have skills in experimentation, analytical, writing and communication (in French and English). Knowledge of eco-design and Life cycle assessment of products and processes will be an asset. Excellent interpersonal skills and a good ability to work in a team. The doctoral student will be registered at the SMRE Doctoral School. It will carry out its activities in the research laboratory located in the premises of Polytech Lille (University of Lille).