246: Why Your Shake Flask Culture Doesn't Scale: OTR, Shaking Diameter, and How to Fix It with Tibor Anderlei - Part 2

Shear sensitivity is the silent challenge behind many advanced biomanufacturing modalities. Orbital-shaken bioreactors—often underestimated—may be a key enabler your CMC development is missing.Tibor Anderlei, CSO at Kühner Shaker, joined David Brühlmann on the Smart Biotech Scientist Podcast to unpack the hidden physics behind bioprocess reproducibility and next-generation shaking technology. He has seen firsthand how overlooking fundamental parameters can derail scale-up and delay development timelines. In his role, Tibor is responsible for the customer interface—spanning sales, service, support, GMP topics, troubleshooting, marketing, and applied technology—with a focus on orbital shaking technology and small-scale cultivation support.Topics discussed:The importance of measuring oxygen transfer rate (OTR) and carbon dioxide transfer rate (CTR) for reproducible bioprocesses—why DO is not sufficient (02:55)Real-time process analytical technology (PAT) for small-scale bioreactors, including microtiter plates and shake flasks (06:47)Pre-culture reproducibility: transferring at the right OTR and its impact on main cultures (07:56)Price sensitivity and scale-up challenges in cultivated meat—implications for media and equipment selection (10:36)Expansion of shaking technology to fields such as mixing, storage, and thawing, including applications in liquid crystal production (12:10)Leadership lessons from competing with bigger players: how smaller companies stay innovative, agile, and close to their customers (14:20)The significance of strong business partner relationships and trusting gut feeling in decision-making (16:32)Key advice for smart biotech scientists: careful definition of screening conditions and the use of online measurement tools at small scale (18:09)Accessible resources for mastering shaken bioreactor techniques, including webinars and direct contact with Tibor Anderlei (19:38)Smart insight:Treat small-scale shaken systems as real bioreactors and define screening conditions carefully from the start. Using online measurement tools even at early stages provides critical visibility and helps ensure that results are reproducible and scalable.Building a robust scale-up strategy requires looking at the process from multiple angles—regulatory, digital, and operational. Listen to those previous episodes:Episode 03 - 04: How to Master Biotech Scale-up Without Guesswork with Leonardo SibilioEpisode 25 - 26: 9 Critical Steps for a Seamless Transition to Large-Scale ProductionEpisode 231-232: From IND to BLA: The Biologics CMC Decisions That Determine Regulatory Success with Henri KornmannEpisode 233-234: Why Most Bioprocess Automation Projects Fail with Anthony CatacchioEpisode 237-238: High-Throughput Microbial Screening with Sebastian BlumConnect with Tibor Anderlei:LinkedIn: www.linkedin.com/in/tibor-anderlei-66342411/Kühner Shaker website: www.kuhner.comShaking Technology Forum: www.shakingtechnology.comSupport the show