Removal of bacterial cells from liquid media using a Foerst continuous-type centrifuge.

The removal of bacterial populations from large volumes of liquid culture media may be accomplished readily using a centrifuge, but the usual efficient continuous-feed type of centrifuge is often large and expensive. In this laboratory, during the past 2 years, bacterial cells have been removed from liquid culture with considerable success, using a small, inexpensive, continuously fed centrifuge. The Foerst centrifuge2 (Figure 1) has been used by aquatic biologists to remove phytoplankton from water (Chandler, Ohio J. Sci., 40, 291, 1940). The centrifuge is well suited