MODELAGEM E SIMULAÇÃO DE UM BIORREATOR PARA A PRODUÇÃO DE XILITOL A PARTIR DE HIDROLISADOS HEMICELULÓSICOS

Abstract

Lignocellulosic materials from agricultural waste are an abundant source of cheap carbon that can be used as a substrate in the production of various chemical compounds. The structure of the lignocellulosic material is composed of three main components: cellulose, hemicellulose and lignin and for these compounds to be bioconverted, it is necessary to carry out a pretreatment in order to release the fermentable sugars present in the composition of the lignocellulosic residue. Xylitol is a polyol that has been extensively studied for its organoleptic and health-beneficial characteristics, such as: high solubility, low glycemic rates and carcinogenicity. Among the yeasts that convert xylose into xylitol, the ones that stand out according to the literature are the Candida genus due to their greater efficiency in converting these compounds. For the realization of the kinetic model the literature data was used. A simulation of the proposed model resulted in fermentative kinetics with satisfactory data from which the good results experimentally by the reference used. Through the model, it is possible to obtain at the end of the process a xylitol concentration of 35 g / L and a cell concentration of 7 g / L. Using the kinetic data, the CSTR reactor was modeled and the impact of the different dilution rates on the simulation of the process.