Hydrolyse enzymatique d'amidon de manioc en réacteur à membrane. Conception et étude d'un nouveau procédé. Modélisation cinétique

MONTPELLIER-BU Sciences (341722106) / SudocSudocFranceF

The effect of enzyme concentration and space time on the performance of a continuous recycle membrane reactor for one-step starch hydrolysis

International audienc

Kinetics of continuous starch hydrolysis in a membrane reactor

International audienc

Potentialities of a Membrane Reactor with Laccase Grafted Membranes for the Enzymatic Degradation of Phenolic Compounds in Water

International audienc

Supercritical fluid extraction of vetiver roots: A study of SFE kinetics

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The volatile oils from the Vetiveria zizanioides oil are particularly appreciated in perfume and cosmetic products but may also be used in the food industry as aroma and flavor agent. The objective of this work was to study the improvement over the conventional process on the quantity and quality of vetiver extracts recovered by supercritical technology (SFE). The pressure effect (100-300 bar) at 40 degrees C, and the influence of amount of ethanol used as cosolvent (0, 5 and 10%, v/v) were studied. Supercritical extraction process was compared to the hydrodistillation, based on vetiver extract quantity and quality; SFE extracts and presented khusimol contents of 14-29% over hydrodistillation and for SFE, the global yields and kinetic parameters obtained using 10% (v/v) of ethanol were statistically different from extraction using 0 and 5% of ethanol. The TLC and GC showed similar chemical profiles for SFE and HID, but were aware some compounds that were observed by TLC just during the t(CER) region. Mathematical modeling was performed for vetiver kinetics obtained by SFE + cosolvent and Sovova model showed the best adjusts for all curves. (C) 2008 Elsevier B.V. All rights reserved.472200208Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CAPES [424/03]CNPq [472512/2004-8

Membrane contactor with hydrophobic metallic membranes: 2. Study of operating parameters in membrane evaporation

International audienc