谷氨酸发酵标准溶解氧水平的确定

Determination of Standard Level of Dissolved Oxygen in Glutamic Acid Fermentation

在谷氨酸发酵过程中,溶氧水平是影响发酵的重要因素之一。文中通过对发酵过程中不同阶段的溶氧水平对发酵指标的影响比较,确定了谷氨酸发酵的标准溶氧水平,产酸达到12.20mg/mL,残糖量为0.62mg/mL,糖酸转化率达到63.73%,因此,可以利用标准溶解氧参数指导工艺,以达到提高产酸率的目的。

In the process of glutamic acid fermentation, dissolved oxygen level was one of the most important factors. The effects of dissolved oxygen level at different phases of the experiments on fermentation were compared based on the standard level of dissolved oxygen determined during the glutamic acid fermentation. In this paper, the concentration of glutamic acid reaches 12.20 mg/mL, and the remains concentration of glucose was 0.62mg/ mL after fermentation, the conversion rate of glucose reaches 60 %. Therefore it was feasible to improve fermentation technique using the level of dissolved oxygen in glutamic acid production.