کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6590232 456855 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micro-bubble aeration in turbulent stirred bioreactors: Coalescence behavior in Pluronic F68 containing cell culture media
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Micro-bubble aeration in turbulent stirred bioreactors: Coalescence behavior in Pluronic F68 containing cell culture media
چکیده انگلیسی
Micro-bubble aeration in stirred bioreactors represents a suitable method that allows sufficient oxygen transfer without the necessity of intense stirring. However, understanding of micro-bubble behavior in real culture media remains a crucial factor in the interpretation of possible cell/bubble interactions and the scale up of bioprocesses. The present study focuses the impact of various stirrer configurations, sparging rates, as well as 2 different bioreactor scales on micro-bubbles in SF-900 II insect culture medium, which represents a suitable example for Pluronic F68 supplemented culture media commonly applied in cell culture processes. Obtained results for the first time demonstrate a coalescence determined increase in bubble Sauter diameter d32 from 187 to 211 µm with increasing stirring intensities. The development of an empirical model reveals d32∝V0.4(P/V)0.4, were P represents the stirrer induced power input and V the medium volume. The results were interpreted a consequence of micro-bubble entrapment in turbulent flow structures. Additional studies on the volumetric oxygen transfer coefficient kLa demonstrate a strong impact of axial flow impellers and indicate that increases in kLa can be attributed to an improvement of the gas-liquid oxygen transfer rather than an increased specific gas surface area due to bubble breakup.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 126, 14 April 2015, Pages 160-168
نویسندگان
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