Wall pressure fluctuations and bubble size distributions at several positions in an airlift fermentor

Measurements of bubble size distribution using direct photographic methods and image analysis have been made on a cylindrical split-column airlift fermentor. Wall pressure fluctuation measurements have also been collected at several vertical positions for a number of systems with different viscosities operated over a range of air flow rates. Tap water, salt water, and CMC in water solutions have been used in the investigation.