Periodical changes of input air flowrate -: a possible way of improvement of oxygen transfer and liquid circulation in airlift bioreactors

被引：15

作者：

Godó, S ^{[1
]}

Klein, J ^{[1
]}

Polakovic, M ^{[1
]}

Báles, V ^{[1
]}

机构：

[1] Slovak Univ Technol Bratislava, Fac Chem Technol, Dept Chem & Biochem Engn, Bratislava 81237, Slovakia

来源：

CHEMICAL ENGINEERING SCIENCE | 1999年 / 54卷 / 21期

关键词：

airlift; mass transfer; gas hold-up; liquid circulation; non-newtonian broth; bubble;

D O I：

10.1016/S0009-2509(99)00215-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The influence of small bubbles on the behaviour of airlift reactors during citric acid fermentation was studied. The small bubbles formed up to 70% of the total gas hold-up, so their distribution strongly influenced the predicted liquid circulation velocities. A periodically changing air flowrate could be used to significantly improve the oxygen transfer capacity of airlift reactors. This could be achieved by the effective utilisation of the oxygen content of small bubbles, which originated from the foam. A procedure based on the evaluation of transient pO(2) and gas hold-up profiles was suggested for the determination of the period of sparging. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：4937 / 4943

页数：7

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