AN AEROBIC-BACTERIA CULTURE APPARATUS EMPLOYING A NEW FOAMBREAKER.
NAVAL RESEARCH LAB WASHINGTON D C
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An aerobic-bacteria culture apparatus incorporating a novel mechanical foambreaker was developed. The culture vessel consists of a 30-in. length of glass pipe four inches in diameter oriented vertically and closed at each end with a stainless steel plate. The bottom plate holds air spargers, and the top is bored to admit an air outlet and, in the center, the foambreaker. The foambreaker consists of a vertical stainless steel tube closed at its lower end with a cap which leaves a one-mil slip between it and the bottom edge of the tube. When the tube is pressurized with compressed air, a high-velocity sheet of air emerges 360 degrees around the tube and effectively breaks foam rising from the aerated medium. The addition of chemical antifoaming agents is thus obviated. Relatively high yields of such bacteria as Bacillus megaterium, Escherichia coli and Serratia marcesens were obtained. Author
- Medical Facilities, Equipment and Supplies