Inactivation of Bacillus stearothermophilus and Bacillus coagulans spores as indicators of sterilization by reciprocal pressurization
2000
Furukawa, S. (Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture) | Saita, K. | Kato, T. | Shimoda, M. | Hayakawa, I.
The effects of the reciprocal pressurization (six reciprocal cycles of 5 min pressurization) (RP) and the continuous pressurization (30-min pressurization) (CP) on the inactivation of spores of Bacillus coagulans and Bacillus stearothermophilus were studied. The combined parameters used were hydrostatic pressure (100, 200, 300 and 400MPa), temperature (45, 55, 65 and 75degC) and total pressurization period (30 min). RP was more effective than CP on inactivating bacterial spores. However, the effectiveness of RP on increasing the inactivation power was observed in hydrostatic pressure over 200MPa.
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