文献类型：期刊文献

英文题名：Computational Fluid Dynamics Modeling of an Inverted Frusto-conical Shaking Bioreactor for Mammalian Cell Suspension Culture

作者：Hang, Haifeng[1];Guo, Yuanxin[1];Liu, Jian[1];Bai, Li[1];Xia, Jianye[1];Guo, Meijin[1];Hui, Matthew[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China

年份：2011

卷号：16

期号：3

起止页码：567

外文期刊名：BIOTECHNOLOGY AND BIOPROCESS ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000292204700025)】；

基金：This study was supported by the National High Technology Research & Development Program (863 Program) of China (No. 2007AA02Z216), the National Special Fund for State Key Laboratory of Bioreactor Engineering (No. 2060204), and the Qianjiang Scholarship of Hangzhou.

语种：英文

外文关键词：inverted frusto-conical shaking bioreactor; mammalian cell suspension culture; mixing time; volumetric oxygen transfer coefficient; computational fluid dynamics simulation

摘要：We previously developed an inverted frusto-conical shaking bioreactor (IFSB) which had high mammalian cell culture performance when compared with a mechanically stirred tank reactor (STR) or a flat-bottom shaking bioreactor (FBSB). Here, we determined the mixing time (t) and volumetric oxygen transfer coefficient (k(L)a) of this IFSB at various speeds, and simulated the fluid hydrodynamics, including the shear stress and specific surface area, by computational fluid dynamics. The shortest mixing time was observed in a STR. The maximum k(L)a value of 12/h was achieved in the IFSB at an aeration rate of 4 L/h, demonstrating that our IFSB has enhanced oxygen transfer capabilities needed to meet the demands of mammalian cells. Simulation studies revealed a 3% greater specific surface area and a 21% lower shear strain in the IFSB compared to an FBSB under the same conditions. Additionally, the conical angle of the vessel, which significantly affected cell growth and recombinant protein production, was tested here. We conclude that, compared to the STR and FBSB, the IFSB has an increased liquid surface area for oxygen uptake and exhaust CO2 stripping, an enhanced k(L)a for cell robust growth to a high cell density, and a lower shear stress to alleviate cell damage.