Development of microwave-assisted dynamic extraction by combination with centrifugal force for polyphenols extraction from lettuce - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles LWT - Food Science and Technology Year : 2018

Development of microwave-assisted dynamic extraction by combination with centrifugal force for polyphenols extraction from lettuce

Abstract

A new process design and operation for the extraction of polyphenols from fresh lettuce was developed. Microwave assisted centrifugation (MW/C) is a combination of microwave heating to explode the internal cells of biological material containing secondary metabolites, and centrifugation to intensify diffusion, collection and separation. MW/C is performed at atmospheric pressure without adding any solvent or water. A detailed study concerning optimization of different operating parameters like microwave power, centrifugal force and extraction time, was performed. MW/C has been compared not only to the reference conventional solvent extraction (CSE) technique but also to microwave extraction assisted by low rotational speed (MW/R) to assess the synergy between centrifugation force and microwave heating. Extracts obtained by MW/C, MW/R and CSE method were compared for the recovery of polyphenols at different time of the process in optimized operating conditions. The new combined MW/C process provided reduction in the extraction time compared to MW/R process, with an enhancement in recovery of target compounds. Energetic and environmental impacts using this combined process were evaluated in a scale up perspective.
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Dates and versions

hal-02622211 , version 1 (26-05-2020)

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Alice Angoy, Marc Valat, Pascal Ginisty, Alain Sommier, Pascale Goupy, et al.. Development of microwave-assisted dynamic extraction by combination with centrifugal force for polyphenols extraction from lettuce. LWT - Food Science and Technology, 2018, 98, pp.283-290. ⟨10.1016/j.lwt.2018.08.059⟩. ⟨hal-02622211⟩
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