title: Kinetics of ultrasound-assisted extraction of antioxidant polyphenols from food by-products: Extraction and energy consumption optimization.
abstract: Ultrasound-assisted extraction (UAE) of antioxidant polyphenols from chicory grounds was studied in order to propose a suitable valorization of this food industry by-product. The main parameters influencing the extraction process were identified. A new mathematical model for multi-criteria optimization of UAE was proposed. This kinetic model permitted the following and the prediction of the yield of extracted polyphenols, the antioxidant activity of the obtained extracts and the energy consumption during the extraction process in wide ranges of temperature (20-60°C), ethanol content in the solvent (0-60% (vol.) in ethanol-water mixtures) and ultrasound power (0-100W). After experimental validation of the model, several simulations at different technological restrictions were performed to illustrate the potentiality of the model to find the optimal conditions for obtaining a given yield within minimal process duration or with minimal energy consumption. The advantage of ultrasound assistance was clearly demonstrated both for the reduction of extraction duration and for the reduction of energy consumption.
authors.affiliation: ICAM site de Lille, 6 rue Auber, 59016 Lille Cedex, France; Univ. Lille, INRA, ISA, Univ. Artois, Univ. Littoral Côte d'Opale, EA 7394 - ICV - Institut Charles Viollette, F-59000 Lille, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Pradal
authors.affiliation: Univ. Lille, INRA, ISA, Univ. Artois, Univ. Littoral Côte d'Opale, EA 7394 - ICV - Institut Charles Viollette, F-59000 Lille, France.
authors.forename: Peggy
authors.initials: P
authors.lastname: Vauchel
authors.affiliation: ICAM site de Lille, 6 rue Auber, 59016 Lille Cedex, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Decossin
authors.affiliation: Univ. Lille, INRA, ISA, Univ. Artois, Univ. Littoral Côte d'Opale, EA 7394 - ICV - Institut Charles Viollette, F-59000 Lille, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Dhulster
authors.affiliation: Univ. Lille, INRA, ISA, Univ. Artois, Univ. Littoral Côte d'Opale, EA 7394 - ICV - Institut Charles Viollette, F-59000 Lille, France. Electronic address: krasimir.dimitrov@polytech-lille.fr.
authors.forename: Krasimir
authors.initials: K
authors.lastname: Dimitrov
mesh_terms: D000975:Antioxidants; D000431:Ethanol; D007700:Kinetics; D010936:Plant Extracts; D059808:Polyphenols / Q000737:chemistry*; D014465:Ultrasonics
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D059808:Polyphenols; D000431:Ethanol
keywords: Cichorium intybus; Energy consumption; Extraction kinetics; Mathematical model; Polyphenols; Ultrasound-assisted extraction