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Key Factors Impacting Viral Retention, Protein Passage & Flow Rates in Ultrafiltration: Poster Presented at PDA

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Ultrafiltration membrane performance for viral removal is key in biomanufacturing. Feed concentration, protein size, and inlet pressure significantly impact flow rates and product recovery, requiring careful process parameter evaluation.

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Membrane Science

Background:

  • Ultrafiltration (UF) membranes are crucial for viral clearance in biomanufacturing.
  • Filtration performance, product quality, and safety are influenced by feed solution properties and operating parameters.
  • Optimizing UF processes requires understanding the interplay between various factors.

Purpose of the Study:

  • To investigate the impact of feed concentration, protein size, and inlet pressure on UF membrane performance.
  • To evaluate how these parameters affect viral retention, flow rates, and downstream product recovery.
  • To provide insights for optimizing UF process development in biomanufacturing.

Main Methods:

  • Studied the effect of varying feed concentrations on UF performance.
  • Compared UF performance for low-molecular-weight (BSA) versus high-molecular-weight (HGG) proteins.
  • Assessed the influence of increasing inlet pressure on UF parameters.
  • Utilized ΦX174 bacteriophage for viral retention studies.

Main Results:

  • Protein concentration affected flow rates but not viral retention at tested levels.
  • Lower molecular weight proteins (BSA) showed higher flow rates and recovery than higher molecular weight proteins (HGG).
  • Increased inlet pressure enhanced flow rates and throughput but reduced downstream protein recovery.

Conclusions:

  • Protein size significantly impacts UF performance and downstream recovery.
  • Inlet pressure presents a trade-off between throughput and product recovery.
  • Careful optimization of UF parameters is essential for efficient biomanufacturing processes.