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Thesis Advisor欧阳藩
Degree Grantor中国科学院研究生院
Other AbstractThe cell growth and glycerol metabolism of omsotolerant yeast reponding with osmotic pressure were investigated and the culture media condition was determined. The effects of detergents on glycerol fermentation were investigated and two kinds of detergents, Sodium Oleat and Dodecbenzene Sulfric Sodium Salt were selected. The former detergent can make the residual glucose to be metablized into less enough without glycerol comsumption, the later can increase the glycerol output rate. Referring to the oscillating operation airlift loop reactor which can enhance the mass transfer process to intensify the glycerol, in order to determine the optimum oscillating frequency and investigate the reason why oscillation can enhance mass transfer, the flow model of liquid jet loop reactor with periodical oscillating operation was proposed and the transient flow was simulated first. The flow developing time from steady central liquid lift to steady circumambient liquid lift and the reverse time were determined thus the oscillating frequency was obtained. The effects of different injection rate, the diameter ration of draft tube vs reactor cylinder and the height of draft tube on flow and oscillating frequency were also investigated. Second, the flow model of airlift loop reactor with oscillating operation and the mass transfer coefficient model were proposed and the transient flow was simulated. Tow kinds of developing time, flow developing time and mass transfer coefficient developing time, were proposed to describe the oscillating flow. It is more available to determine the optimum oscillating frequency according to mass transfer coefficient developing time. The effects of aeration rate and the height of draft tube on flow, mass transfer coefficient, gas holdup and oscillating frequency were investigated. Finally, the immobilized fermentation using osmoterlant yeast was studied, a new multi-cells S-G-L reactor was proposed to improve the oxygen transfer for immobilized fermentation and its mass transfer behavior was investigated.
Document Type学位论文
Recommended Citation
GB/T 7714
刘天中. 甘油发酵过程的调控及环流反应器周期振荡操作数值模拟[D]. 中国科学院研究生院,1998.
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甘油发酵过程的调控及环流反应器周期振荡操(7487KB) 限制开放CC BY-NC-SAApplication Full Text
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