Mixing & mass transfer
Mixing & Mass Transfer
Mass transfer and mixing time in an aerated production vessel
Mixing time and kL a evaluated across operating points to locate the actual limiting mechanism instead of over-agitating the whole window.
Reactor optimization
Reactor Optimization – Sandoz Kundl
Impeller reconfiguration in a 160 m³ bioreactor
Alternating radial and axial impellers, evaluated experimentally and by CFD, improved mixing while cutting power demand at production scale.
30% Shorter mixing time 20% Lower energy demand 3,740 MWh saved per year
Hydrodynamics
Free Surface
Vortex and free-surface behavior in stirred tanks
Free-surface simulation of the gas–liquid interface to assess vortex formation, surface aeration and their impact on process performance.
Digital twin
ECOnti – Digital Twin for Continuous Bioproduction
A digital twin for continuous bioproduction
A collaborative project combining mechanistic models and process data into a digital twin supporting stable continuous operation.
30 Days of stable continuous production
Scale-up
Scale-up with Hybrid Models
Hybrid modeling for scale-consistent process transfer
Mechanistic reactor models combined with data-driven elements to predict scale-dependent behavior where correlations alone fall short.
Scale-up
From Shake Flask to Stirred Tank
Morphology-consistent scale-up of filamentous cultivations
Scale-up based on the maximum energy dissipation rate, quantified by CFD, kept Streptomyces morphology comparable from shake flask to stirred-tank reactor.