In the current industrial process of producing L-tyrosine by microbial fermentation method, the basic culture medium is generally added into the fermentation tank in the early stage, and then various nutrients are fed in the middle and later stages. Although in the entire fermentation process, the operations of taking and releasing materials are reduced, ensuring that materials are not wasted during the fermentation, with the continuous increase of fed-in materials, the fermentation liquid system continues to expand. The fermentation parameters need to be continuously regulated and controlled artificially in the later stage of fermentation. However, it is difficult to avoid the fluctuation of the regulation parameters in the artificial regulation and control, and eventually affecting the fermentation results. Therefore, efficient continuous fermentation is adopted in this experiment, which can greatly improve the cell vitality and effectively prolong the peak period of acid production. In order to optimize the high-density continuous...

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