Performance comparison of suspended bed and batch contactor chromatography

Area of Science:

• Biochemical Engineering
• Separation Science
• Chromatography

Background:

• Traditional biomolecule purification often involves multiple batch adsorption/desorption steps using agitated contactors.
• These methods can be time-consuming and less efficient for large-scale applications.
• There is a need for more efficient and contained separation techniques.

Purpose of the Study:

• To introduce and evaluate suspended bed chromatography as a novel process-scale separation technique.
• To demonstrate the advantages of suspended bed chromatography over traditional agitated contactor methods.
• To validate the performance of suspended bed chromatography using a case study.

Main Methods:

• A hybrid process combining batch adsorption in a stirred tank with elution in an enclosed column system.
• Transferring the adsorbent slurry directly into a specialized column (e.g., IsoPak) to form a packed bed.
• Utilizing standard column chromatography techniques for product elution.
• Performance evaluation through full-scale experimental results and process simulations.

Main Results:

• Suspended bed chromatography proved to be a significantly quicker and fully contained process compared to batch methods.
• The purification of ovalbumin from hen-egg white using anion-exchange chromatography served as a successful proof-of-concept.
• Experimental data and simulations confirmed the efficacy of the suspended bed approach.

Conclusions:

• Suspended bed chromatography is a viable and superior alternative to traditional agitated contactor batch separations for various applications.
• The availability of suitable systems and media makes suspended bed chromatography a practical innovation.
• This technique enhances purification efficiency and containment in biomolecule recovery.