title: Impact of ultrasound on solid-liquid extraction of phenolic compounds from maritime pine sawdust waste. Kinetics, optimization and large scale experiments.
abstract: Maritime pine sawdust, a by-product from industry of wood transformation, has been investigated as a potential source of polyphenols which were extracted by ultrasound-assisted maceration (UAM). UAM was optimized for enhancing extraction efficiency of polyphenols and reducing time-consuming. In a first time, a preliminary study was carried out to optimize the solid/liquid ratio (6g of dry material per mL) and the particle size (0.26 cm(2)) by conventional maceration (CVM). Under these conditions, the optimum conditions for polyphenols extraction by UAM, obtained by response surface methodology, were 0.67 W/cm(2) for the ultrasonic intensity (UI), 40°C for the processing temperature (T) and 43 min for the sonication time (t). UAM was compared with CVM, the results showed that the quantity of polyphenols was improved by 40% (342.4 and 233.5mg of catechin equivalent per 100g of dry basis, respectively for UAM and CVM). A multistage cross-current extraction procedure allowed evaluating the real impact of UAM on the solid-liquid extraction enhancement. The potential industrialization of this procedure was implemented through a transition from a lab sonicated reactor (3 L) to a large scale one with 30 L volume.
authors.affiliation: Université de La Rochelle, LaSIE, UMR-CNRS 7356, Pôles Sciences et Technologie, Avenue Michel Crépeau, 17042 La Rochelle, France; Université d'Avignon et des Pays de Vaucluse, INRA, UMR408, Sécurité et Qualité des Produits d'Origine Végétale, 84000 Avignon, France.
authors.forename: A
authors.initials: A
authors.lastname: Meullemiestre
authors.affiliation: Université d'Avignon et des Pays de Vaucluse, INRA, UMR408, Sécurité et Qualité des Produits d'Origine Végétale, 84000 Avignon, France.
authors.forename: E
authors.initials: E
authors.lastname: Petitcolas
authors.affiliation: Université de La Rochelle, LaSIE, UMR-CNRS 7356, Pôles Sciences et Technologie, Avenue Michel Crépeau, 17042 La Rochelle, France.
authors.forename: Z
authors.initials: Z
authors.lastname: Maache-Rezzoug
authors.affiliation: Université d'Avignon et des Pays de Vaucluse, INRA, UMR408, Sécurité et Qualité des Produits d'Origine Végétale, 84000 Avignon, France.
authors.forename: F
authors.initials: F
authors.lastname: Chemat
authors.affiliation: Université de La Rochelle, LaSIE, UMR-CNRS 7356, Pôles Sciences et Technologie, Avenue Michel Crépeau, 17042 La Rochelle, France. Electronic address: sarezzou@univ-lr.fr.
authors.forename: S A
authors.initials: SA
authors.lastname: Rezzoug
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D007220:Industrial Waste; D007700:Kinetics; D010316:Particle Size; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D028223:Pinus / Q000737:chemistry*; D000069453:Ultrasonic Waves; D014934:Wood / Q000737:chemistry*
chemical_list: D007220:Industrial Waste; D010636:Phenols
keywords: Cross current extraction; Extraction kinetics; Maceration; Maritime pine wood; Phenolic compounds; Response surface methodology; Ultrasonic extraction