球孢白僵菌催化苯甲酸合成对羟基苯甲酸液体发酵优化Optimization of Liquid Fermentation for Synthesis of p-Hydroxybenzoic Acid from Benzoic Acid Catalyzed by Beauveria bassiana
刘宗求,刘雨,彭继兰,王金华,王永泽,高娃
摘要(Abstract):
为提高球孢白僵菌液体发酵产对羟基苯甲酸的能力,该研究确定了液体发酵过程中最适苯甲酸添加量为5 g/L,最优碳、氮源组合为玉米淀粉20 g/L和蛋白胨10 g/L,发酵温度为28℃,初始pH值为7.5,转速为200 r/min,接种量为17.5%。按照此条件进行验证实验,对羟基苯甲酸的产量可达3.85 g/L,产率为76.69%,与理论数据(产量为3.80 g/L,产率为75.72%)较吻合,说明此次优化方案可行。相较于优化前对羟基苯甲酸产量提升了12倍。该研究为对羟基苯甲酸的微生物合成提供了技术参考。
关键词(KeyWords): 球孢白僵菌;液体发酵;对羟基苯甲酸;发酵条件优化
基金项目(Foundation): 国家自然科学基金(青年项目)(31501677);; 企业合作项目(2020240)
作者(Author): 刘宗求,刘雨,彭继兰,王金华,王永泽,高娃
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