Étude de l’hydrolyse chimique de la biomasse lignocellulosique

Abstract: The waste generated by the apricot processing industry represents an interesting source for recovering industrial waste into renewable energy while eliminating this waste in order to contribute to the protection of the environment in the context of sustainable development. This work concerns the study of the apricot hydrolysis for bioethanol production; the residues are generated from the apricot processing industry. Different parameters have been optimized such as: the (mass / water) ratio (5%, 7.5%, 10%), particle size, etc. For such case, chemical pretreatment has been carried out using acid, oxidative and alkaline pretreatments with different concentrations (0.5%, 1%, 4%, 7%) (V/V) at a temperature of 80 °C. It has been found that the hydrolysis of lignocellulosic biomass using sulfuric acid (1%) led to the total sugars extraction of about 93.05 g/L. Resume : Les dechets issus de l’industrie de transformation de l’abricot presentent une source interessante de dechets qui peuvent etre valorises en energies renouvelables et leurs eliminations contribuent grandement a la protection de l’environnement. Ce travail concerne l’etude de l’hydrolyse des residus d’abricot dans le but de produire un biocarburant en particulier, le bioethanol. Differents parametres ont ete optimises a savoir : le rapport (masse/ eau) (5% ; 7,5% ; 10%), la granulometrie des dechets, etc. Pour cela, des traitements chimiques ont ete realises en utilisant des milieux alcalins, acides et oxydes a differentes concentrations (0,5%,1%, 4%, 7%) (V/V) a une temperature de 80°C. A l’issue de notre travail, l’hydrolyse de la biomasse lignocellulosique par l’acide sulfurique a 1% a permis de liberer jusqu’a 93,05 g/L de sucres totaux.