摘要
One of the main drawbacks in operating solid-state fermentation (SSF) bioreactors is the reduction in moisture content (MC) of the solid phase due to microbiological and physicochemical issues. Therefore, heat and mass transfer models require hygroscopic information concerning the solid substrate. This contribution addresses the study of the sorption isotherms of sugarcane bagasse (SCB) and wheat bran (WB) obtained using the static gravimetric method, with temperature and water activity as the controlled variables. The Oswin model was selected to construct the sorption isotherm for SCB, and the Halsey model, modified in the present study, for WB. The Bates and Watts curvature measurements and the Box parameter bias were used to analyze the nonlinear behavior and assess the goodness of the fitting process. Fermentative assays were carried out in glass flasks for the production of endoglucanase employing the fungus Myceliophthora thermophila I-1D3b, controlling the environmental water activity, in order to assess the influence of the loss of moisture from the solid phase on fungal metabolic activity.
摘要译文
之一，在操作固态发酵（SSF）的生物反应器的主要缺点是，在固相的水分含量（MC）由于微生物和理化问题的减少。因此，传热传质模型需要有关固体基质的吸湿性信息。这种贡献涉及使用静态重量法获得甘蔗渣（SCB）和麦麸（WB）的吸附等温线的研究，随着温度和水活度作为受控变量。该OSWIN模型选择用来构成等温吸附线的SCB，且哈尔西模型，修正在本研究中，对白平衡。贝茨和Watts曲率测量和所述框参数偏压被用来分析的非线性行为，并评估拟合过程的美好。发酵试验，进行了玻璃烧瓶内切葡聚糖酶的生产采用真菌嗜热Ⅰ-1D3b，控制环境水活性，以评估水分从真菌代谢活性固相上的损失的影响。
Fernanda Perpétua Casciatori; Carmem Lúcia Laurentino; Alex Izuka Zanelato; João Cláudio Thoméo. Hygroscopic properties of solid agro-industrial by-products used in solid-state fermentation[J]. Industrial Crops and Products, 2015,64: 114–123