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2015-06-03 - Colloque/Présentation - poster - Anglais - 1 page(s)

Castro Cristiana , Nobre Clarisse, Duprez Marie-Eve , Hantson Anne-Lise , De Weireld Guy , "Evaluation of synthetic and agro-industrial carriers for immobilization of Aureobasidium pullulans cells for fructo-oligosaccharides production" in 11th International Conference on Renewable Resources and Biorefineries, York, United Kingdom, 2015

  • Codes CREF : Biochimie (DI3112), Biotechnologie (DI3800), Fermentation biosynthèse (DI3810), Génie chimique (DI2721)
  • Unités de recherche UMONS : FPMs - Service du Doyen (F100), Génie des Procédés chimiques et biochimiques (F505), Thermodynamique, Physique mathématique (F506)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
Texte intégral :

Abstract(s) :

(Anglais) Fructooligosaccharides (FOS) are prebiotic oligosaccharides with increased commercial interest [1]. FOS can be produced from sucrose by free or immobilized microorganisms with transfructosylating enzymes [2]. Cells immobilization can be applied to improve FOS yields and percentage in the medium as it increases cells stability and concentration in the medium [3]. Nevertheless, a good performance of the system depends on the right selection of the suitable carrier to adhere cells [4]. In this work, selected agro-industrial carriers to immobilize Aureobasidium pullulans fungi cells were compared to synthetic and mineral materials. Agro- industrial carriers include mandarin and banana peels, and nut, almond, pistachio and chestnut shells; synthetic carriers include foams, vegetal and synthetic fibers, porous clay and glass wool; and mineral carriers include pumice and porous stone. Cells were immobilized in situ by adhesion, through direct contact to the carrier at the beginning of the batch fermentations. The cells immobilization capacity was evaluated based on the biomass amount free and adhered to the carrier and by the water absorption index (WAI) and the critical humidity point (CHP) values determined for each carrier.