模拟和优化由Schizochytrium sp.产生的多可萨赫萨酸的生产. 基于动态建模和遗传算法优化的人工神经网络
Zi-Lei Chen1, Hui Lian1, Lin-Hui Yang1
1School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210023, People's Republic of China.
Bioresource technology
|February 24, 2025
概括
这项研究优化了Schizochytrium sp.中的多可萨赫萨酸 (DHA) 生产. 使用动态建模和机器学习,实现了10.4%的DHA产量增加. 综合框架提高了生物工艺的效率,降低了成本.
科学领域:
- 生物技术是生物技术.
- 微生物发酵 微生物发酵
- 生物化学工程 生物化学工程
背景情况:
- 作为一种必需的欧米茄-3脂肪酸,多可萨赫萨酸 (DHA) 对人类健康至关重要.
- 精神分裂 (Schizochytrium sp.) 是一种疾病. 是DHA的关键微生物生产者,但由于复杂的参数相互依赖,其生物过程优化面临挑战.
- 目前优化DHA生产的方法通常受到动态代谢转变和种植参数相互作用的限制.
研究的目的:
- 开发一个综合框架,结合动态建模和机器学习,以增强Schizochytrium sp.中的DHA生产.
- 优化生物过程参数,以最大限度地提高DHA产量和生产力.
- 为工业DHA生物合成建立一个可扩展和具有成本效益的方法.
主要方法:
- 利用运动模型 (物流和卢德金-皮雷特方程) 来描述生物质,脂质和DHA生产动态.
- 使用人工神经网络 (ANN) 训练发酵数据来预测生物质和DHA产量.
- 将基因算法 (GA) 与ANN (ANN-GA) 集成,以优化预测准确性 (R2 = 0.988) 并克服局部最佳情况.
- 通过实验验证了从ANN-GA模型获得的最佳三阶段控制策略.
主要成果:
- 该ANN-GA模型实现了高预测准确度 (R2 = 0.988) 的DHA产量.
- 确定了一种最佳的三阶段控制策略,导致DHA生产大幅增加.
- 实验验证表明,与最佳训练数据相比,DHA产量有10.4%的改善,达到45.13g/L.
- 综合方法成功地平衡了种植参数和代谢转变,以增强DHA生物合成.
结论:
- 联合的动力建模和ANN-GA框架为优化微生物DHA生产提供了一个强大而可扩展的策略.
- 这种方法有效地解决了生物过程中的动态相互依存,从而提高了产量和降低了实验成本.
- 这项研究提供了一种有价值的工具,可以提高像DHA这样的必需欧米茄-3脂肪酸的工业生产.
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