Enhancing the Performance of Tangential Flow Microfiltration for Bioreactor Clarification.

Area of Science:

• Bioprocess Engineering
• Separation Science
• Cell Culture Technology

Background:

• Tangential flow filtration (TFF) is a common bioreactor clarification method, but membrane fouling limits its commercial application.
• Membrane fouling compromises TFF performance, necessitating strategies for improved efficiency and longevity.

Purpose of the Study:

• To investigate the integration of a hydrocyclone with microfiltration to mitigate membrane fouling.
• To evaluate the impact of this integrated system on microfiltration performance using Chinese hamster ovary cells.

Main Methods:

• A hydrocyclone was integrated as a primary clarification step before microfiltration.
• Two types of hollow fiber microfiltration membranes (symmetric and reverse asymmetric) were tested.
• Experiments were conducted with Chinese hamster ovary cells at varying viabilities (0-96%) and densities (0.9-10 million cells/mL).

Main Results:

• The reverse asymmetric membrane showed better fouling resistance than the symmetric membrane without hydrocyclone integration.
• Hydrocyclone integration reduced flux decline for the symmetric membrane.
• Hydrocyclone integration did not significantly alter the performance of the reverse asymmetric membrane.

Conclusions:

• Hydrocyclone integration is a viable strategy to reduce microfiltration membrane fouling in bioreactor clarification.
• The choice of membrane morphology and pore size is critical for optimizing integrated hydrocyclone-microfiltration systems.
• This integrated approach offers potential for enhanced bioprocessing efficiency.