基于模糊理论的酵母发酵动力学模型

Study of the Fuzzy Growth Model of Fermentation Based on the Fuzzy Theory

在模糊理论基础上,提出了一种描述菌体生长的模糊动力学模型,将专家对发酵过程的定性经验描述和精确的数学模型联系起来.模型分析发现,对数期隶属度函数就是菌体的相对比生长速率,从而提供了一种划分菌体发酵阶段的方法.最后针对酵母发酵过程,精确地确定了划分对数生长期的开始时间和结束时间.

A fuzzy growth model was constructed based on the fuzzy theory. It combined the qualitative describe of expert and the quantitative mathematic mode into one system. The model showed that the relative specific growth rate curve was the optimal membership function of the exponent growth phase. Thus a method was obtained to divide the phases in fermentation. Finally, the exponential growth phase was marked off in the yeast fermentation.