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.
目的：以黄色短杆菌XV0505为生产菌株，探讨发酵培养基和发酵控制条件对L-缬氨酸的产量和糖酸转化率的影响。
Objective:Using Brevibacterium flavum XV0505 as production strain, the influence of fermentation medium and fermentation conditions on the yield and glucose acid invert ratio of L-valine were studied.
目的：利用有机膜过滤和离子交换法分离提取发酵液中的L-缬氨酸。
Objective:Using organic membrane filtration and ion exchange to extract L-valine from the fermentation broth.
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