摘要
本文研究了游离细胞连续发酵时应用 CO_2气提、活性炭吸附的乙醇发酵和分离动力学,考察了稀释率和进口葡萄糖浓度对发酵速率的影响,提出了包括 CO_2汽提乙醇速率的发酵动力学模型,研究了连续发酵时的稳态和动态过程,结果表明,CO_2气提有助于减少乙醇对酵母的抑制作用,发酵动力学模型可以较好地关联稳态时的发酵动力学数据,从中获得的模型参数可以用于预测动态过程中底物、微生物及产物的变化规律。对于所研究的过程,存在着最佳稀释率和进口糖浓度以获得最大发酵速率。
In this work,fermentation and separation kinetics of in situ separation of ethanol fermentation with CO_2 stripping and activated carbon adsorption process was studied for free cell continuous fermentation.The effects of dilution rate and inlet glucose concentration on fermentation rate were inves- tigated.A fermentation kinetic model including the rate of ethanol stripped by CO_2 was proposed.Both steady-state and dynamic processes were also studied. The results show that CO_2 stripping is beneficial to reduce the yeast in- hibition caused by ethanol.The mathematical model can correlate the steady state fermentation data.The parameters simulated from steady-state experi- mental results can be used to predict the dynamic behaviors of substrate,product and microorganism.A maximum fermentation rate can be achieved at the opti- mized dilution rate and inlet glucose concentration according to experimental results and model prediction.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
1990年第1期34-42,共9页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金
