不同搅拌体系下黄原胶发酵的研究

Xanthan Gum Fermentation Production in Different Mixing Systems

本实验通过对三种不同搅拌体系下黄原胶发酵动力学参数:野油菜黄单细胞菌XG-101菌体浓度、黄原胶浓度、黏度、平均分子质量、丙酮酸功能基团以及残糖的测定,验证了冷模条件下组合桨(上层下压式双折叶圆盘涡轮,下层六叶布鲁马金)体系和最大叶片式桨体系具有高气含率和优良传质性能的结论,更重要的是为工业上提高黄原胶发酵产量和发酵质量(黄原胶平均分子质量和丙酮酸功能基团的含量)提供理论指导,具有一定的实际意义。

The kinetic parameters of xanthan gum fermentation production such as cell density of Xanthomonas campestris XG-101 (OD650 nm), xanthan gum concentration, viscosity, average molecular weight, pyruvic acid functional groups and residual sugar, were determined in three different mixing systems. This study proved that in cold model test, the systems of combined impellers (above: double-folded blade downflow disc turbine; below: six-blade Brumajin) and maxblend impeller have high gas hold-up and superior mass t...