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Raj Krishnan

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Articles


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Scaling down biopharmaceutical operations Part 1: Fermentation

Steve Rausch;Jim Seely;Stephanie Tozer;Raj Krishnan;Dave Smiley;Anurag S. Rathore
April 1st 2006

Creation and qualification of scale-down models are essential for performing several critical activities that support process validation and commercial manufacturing. As shown in Figure 1, these activities include process characterization and production support studies that are performed to evaluate column and membrane lifetimes, demonstrate clearance of host-cell impurities and viruses and troubleshoot manufacturing issues. While the underlying fundamentals are relatively the same as those when scaling up, some unique considerations should be taken when scaling unit operations down.4

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