解脂耶氏酵母生产赤藓糖醇的发酵工艺优化及其动力学模型构建Optimization of Fermentation Process and Construction of Kinetic Model for Erythritol Production by Yarrowia lipolytica
黎奇伟,刘晓兰,郑喜群,姜彩霞,褚佳盈
摘要(Abstract):
为提高解脂耶氏酵母(Yarrowia lipolytica)发酵生产赤藓糖醇的产量与过程可控性,该研究以高产菌株DX-UV-39为研究对象,综合采用多参数工艺优化与动力学模型构建相结合的策略,有效提升了赤藓糖醇产量并强化了过程控制能力。通过单因素试验和Box-Behnken响应面法系统优化发酵条件,确定最佳工艺为温度33.3℃、pH值6.3、发酵时间216.7 h、接种量10.3%。在该条件下,赤藓糖醇产量达到96.91 g/L。进一步建立的菌体生长、产物合成与底物消耗动力学模型拟合效果良好,结果显示,菌体生长呈典型S形曲线,赤藓糖醇合成属于部分生长耦联型,葡萄糖消耗与菌体生长和维持代谢密切相关。该研究通过工艺优化与动力学建模相结合,显著提高了赤藓糖醇产量,为发酵过程的精准调控与工业化放大提供了理论支持。
关键词(KeyWords): 赤藓糖醇;解脂耶氏酵母;发酵工艺优化;动力学模型
基金项目(Foundation): 黑龙江省重点研发计划项目(2022ZX02B15-2)
作者(Author): 黎奇伟,刘晓兰,郑喜群,姜彩霞,褚佳盈
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