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。
In the process of glutamic acid fermentation, dissolved oxygen level was one of the most important factors.
磷酸盐。它是谷氨酸发酵过程中必需的，但浓度不能过高，否则会转向缬氨酸发酵。
Phosphate. It is essential glutamic acid fermentation process, but the concentration can not be too high, otherwise they will be to valine fermentation.
针对微生物发酵生产谷氨酸过程中存在的问题，提出了一种固定化微生物发酵生产谷氨酸的新方法。
Considering the problem of glutamic acid production in microbial culture, a new method of glutamic acid production by Brevibacterium flavum immobilized in microcapsules was put forward.
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