Gas-Liquid Mass Transfer Characteristics with Microbubble Aeration - I. Standard Stirred Tank

被引:23
作者
Li, Xiangyang [1 ]
Li, Pingping [1 ,2 ]
Zu, Liangzhu [3 ]
Yang, Chao [1 ,2 ]
机构
[1] Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Zongguancun Bei 2 Jie 1, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing, Peoples R China
[3] Nanjing Jiuzhang Chem Technol Co Ltd, Nanjing, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Bubble size distribution; Gas-liquid mass transfer; Microbubble aeration; Stirred tanks; SIZE DISTRIBUTION; AGITATED VESSELS; FERMENTATION; GENERATION; BUBBLES; REACTOR; SYSTEM; FLOW;
D O I
10.1002/ceat.201500644
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
More knowledge has to be acquired on the gas-liquid mass transfer characteristics with microbubble aeration before an efficient bioreactor is designed. Experiments about this subject have been conducted in a stirred reactor. Some valuable conclusions were obtained: the shaft power consumption is little affected by the superficial gas velocity (v(s)) and the power consumption of the microbubble generator is rather high; the dispersion of microbubbles is more uniform compared to sparger aeration; surface aeration leads to a reduced microbubble number and the diameter of the microbubble increases with higher superficial gas velocity; when surface aeration happens, the k(L)a-v(s) curves turn quite abnormally different from that in the case of sparger aeration, and correlation-based calculations fit well with the measurements.
引用
收藏
页码:945 / 952
页数:8
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