Bühler bubble column reactors use gas injection from the bottom to mix and aerate the fermentation broth without an internal agitator. This simple, robust design is ideal for large-volume, aerobic processes where low mechanical complexity, high uptime, and cost-effective operation are key. Column geometry, gas distribution, and internals are tailored to your organisms and process targets.
No mechanical agitator – fewer moving parts, reduced wear, and high mechanical reliability, especially in large-scale vessels.
Well-suited to high-volume fermentations with moderate oxygen demand, where investment and operating costs must stay low.
Gas-driven mixing with adjustable bubble size and gas rate, suitable for broths with low to medium viscosity and foaming tendencies.
Bubble column reactors achieve mixing and mass transfer by rising gas bubbles rather than mechanical impellers. This eliminates internal agitator shafts and seals, reducing mechanical complexity and maintenance needs. Gas rate, sparger design, and bubble size distribution are engineered to deliver the required oxygen transfer and mixing performance while maintaining gentle shear conditions.
Column diameter, height, and aspect ratio are selected to optimize gas holdup, bubble residence time, and mixing intensity. Gas spargers and optional internals are configured to control bubble dispersion, coalescence, and back-mixing, supporting stable operation across a wide range of gas loads. These proven design rules enable reliable scale-up from pilot to industrial-scale bubble columns.
Bühler bubble column reactors are built in food- and pharma-grade stainless steels with surface finishes adapted to your cleaning strategy. They are fully CIP/SIP-ready, with spray devices and drainability designed for efficient cleaning and sterilization. Integrated instrumentation for gas flow, pressure, temperature, and composition, combined with Bühler automation systems, enables precise control and optimization of your large-scale aerobic processes.
bioprocessing@buhlergroup.com
