Stitting as foam disruption (SAFD) technique in fermentation processes

摘要

Foam reduction through stirring was studied in 20 L bioreactors with artificial media and with an actual biotransforma- tion process. For a given stirrer configuration and within a certain range of the broth mass, the foam height was corre- lated with the broth mass, i.e. the distance between upper stirrer and dispersion surface, and with the superficial gas velocity. Increasing the stirrer speed often resulted in reducing the foam height.