Development of small-scale models to understand the impact of continuous downstream bioprocessing on integrated virus filtration
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Updated: Jul 1, 2026

Estimating Virus Production Rates in Aquatic Systems
Published on: September 22, 2010
Scott Lute1, Julie Kozaili2, Sarah Johnson1
1U.S. FDA CDER/OPQ/OBP/DBRR 2, Silver Spring, Maryland.
Abstract:
We designed small-scale virus filtration models to investigate the impact of the extended process times and dynamic product streams present in continuous manufacturing. Our data show that the Planova 20N and BioEX virus filters are capable of effectively removing bacteriophage PP7 (>4 log) when run continuously for up to 4 days. Additionally, both Planova 20N and BioEX filters were able to successfully process a mock elution peak of increased protein, salt, and bacteriophage concentrations with only an increase in filtration pressure observed during the higher protein concentration peak. These experiments demonstrated that small-scale viral clearance studies can be designed to model a continuous virus filtration step with specific process parameters.
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