摘要
采用新型进气装置在反应器中构建了泰勒涡柱流,以提高发酵液中溶氧水平,并与带常规空气进气装置的反应器进行了对比,推导出发酵液中溶氧浓度与反应器中微生物浓度之间的对应关系,考察了泰勒涡柱作用下的微生物生长动力学。结果表明,微生物比生长速率与通入发酵液中的气泡尺寸和气体比表面积成正比;微生物生长过程与气泡吸附过程有关,可通过改变吸附量来改变发酵过程。对于建立吸附发酵生长动力学模型和实现微生物高密度培养具有一定的指导意义。
A new-style air distributor is used to induce the formation of Taylor vortex, which increases dissolved oxygen concentration in broth. Relations between dissolved oxygen and microorganisms concentration in broth are deduced. The kinetics of microorganism growth under the action of Taylor vortex column is studied, and contrastive experiments between bioreactors which use new-style and traditional air distributors are carried out. Data analysis results show that specific growth rate of microorganisms is in direct proportion to the sizes and specific surface areas of bubbles, and characteristics of fermentation process can be enchanced by improving adsorption quantities of bubbles. The experimental results provide guidances on the establishment of adsorptive kinetics model of microorganism growth, and demonstrate a bright prospect on microorganism cultivation of high-density.
出处
《化学与生物工程》
CAS
2009年第10期69-71,共3页
Chemistry & Bioengineering
关键词
泰勒涡柱
溶氧
微生物发酵
反应动力学
Taylor vortex column
dissolved oxygen
microorganism fermentation
kinetics
