Application of KHX Impeller in a Low-shear Stirred Bioreactor

doi:10.1016/j.cjche.2014.09.001

›› 2014, Vol. 22 ›› Issue (10): 1072-1077.DOI: 10.1016/j.cjche.2014.09.001

Application of KHX Impeller in a Low-shear Stirred Bioreactor

Shifang Yang, Xiangyang Li, Gang Deng, Chao Yang, Zaisha Mao

Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2013-01-18 修回日期:2013-07-05 出版日期:2014-10-28 发布日期:2014-12-01
通讯作者: Xiangyang Li, Chao Yang
基金资助:
Supported by the National Basic Research Program of China (2010CB630904), the National Natural Science Foundation of China (21276004, 20990224), the National Natural Science Fund for Distinguished Young Scholars (21025627) and the National High Technology Research and Development Program of China (2012AA061503).

Application of KHX Impeller in a Low-shear Stirred Bioreactor

Shifang Yang, Xiangyang Li, Gang Deng, Chao Yang, Zaisha Mao

Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2013-01-18 Revised:2013-07-05 Online:2014-10-28 Published:2014-12-01
Supported by:
Supported by the National Basic Research Program of China (2010CB630904), the National Natural Science Foundation of China (21276004, 20990224), the National Natural Science Fund for Distinguished Young Scholars (21025627) and the National High Technology Research and Development Program of China (2012AA061503).

摘要/Abstract

摘要： In our previous work, a low-shear stirred bioreactor was explored. With a pitched blade turbine impeller downflow (PBTD) used, the shear stress generated is high compared with that in some low shear axial flow impellers. KHX impeller is an efficient axial flow impeller, which provides large onflow diffusivity and low shear force. In thiswork, the KHX impellerwas applied in a lower-shear bioreactor and the performance of this reactor was evaluated and comparedwith that of the PBTD impeller. The experimental results showthat the KHX impeller can disperse gas at lower power consumption and gives greater gas-liquid volumetric mass transfer coefficients than PBTD at the same power consumption. An empirical correlation for evaluating the mass transfer coefficient of the KHX impeller in the bioreactor is presented to provide reference for its industrial application.

关键词: Bioleaching reactor, Draft tube, Mass transfer coefficient, Ore suspension, Shear stress

Abstract: In our previous work, a low-shear stirred bioreactor was explored. With a pitched blade turbine impeller downflow (PBTD) used, the shear stress generated is high compared with that in some low shear axial flow impellers. KHX impeller is an efficient axial flow impeller, which provides large onflow diffusivity and low shear force. In thiswork, the KHX impellerwas applied in a lower-shear bioreactor and the performance of this reactor was evaluated and comparedwith that of the PBTD impeller. The experimental results showthat the KHX impeller can disperse gas at lower power consumption and gives greater gas-liquid volumetric mass transfer coefficients than PBTD at the same power consumption. An empirical correlation for evaluating the mass transfer coefficient of the KHX impeller in the bioreactor is presented to provide reference for its industrial application.

Key words: Bioleaching reactor, Draft tube, Mass transfer coefficient, Ore suspension, Shear stress

Shifang Yang, Xiangyang Li, Gang Deng, Chao Yang, Zaisha Mao. Application of KHX Impeller in a Low-shear Stirred Bioreactor[J]. , 2014, 22(10): 1072-1077.

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Application of KHX Impeller in a Low-shear Stirred Bioreactor

Application of KHX Impeller in a Low-shear Stirred Bioreactor

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