Faculdade de Engenharia Química, Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6066, 13083-970 Campinas, São Paulo, Brazil.
Bioresour Technol. 2013 Feb;130:351-9. doi: 10.1016/j.biortech.2012.12.045. Epub 2012 Dec 20.
In this work, a kinetic model for ethanol fermentation from sugarcane bagasse enzymatic hydrolysate concentrated with molasses was developed. A model previously developed for fermentation of pure molasses was modified by the inclusion of a new term for acetic acid inhibition on microorganism growth rate and the kinetic parameters were estimated as functions of temperature. The influence of the hydrolysate on the kinetic parameters is analyzed by comparing with the parameters from fermentation of pure molasses. The impact of cells recycling in the kinetic parameters is also evaluated, as well as on the ethanol yield and productivity. The model developed described accurately most of the fermentations performed in several successive batches for temperatures from 30 to 38°C.
本工作建立了一个从甘蔗渣酶解液浓缩糖蜜中发酵乙醇的动力学模型。通过在模型中加入一个新的关于乙酸对微生物生长速率抑制的项，对之前开发的用于发酵纯糖蜜的模型进行了修正，并将动力学参数估计为温度的函数。通过与纯糖蜜发酵的参数进行比较，分析了水解液对动力学参数的影响。还评估了细胞循环对动力学参数以及乙醇产率和生产力的影响。所建立的模型准确地描述了在 30 到 38°C 的多个连续批次发酵中的大多数情况。
