P-8 Inactivation of poisonous microorganisms by ultrasonic irradiation
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- Tsukamoto I.
- Graduate School of Engineering, Osaka Prefecture University
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- Yim B.
- Graduate School of Engineering, Osaka Prefecture University
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- Furuta M.
- Research Institute for Advanced Science and Technology, Osaka Prefecture University
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- Mukai S.
- Water Quality Control Center, Dept. of Waterworks Osaka Prefecture Government
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- Kimata I.
- University of Osaka City, Dept. of Medical
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- Maeda Y.
- Graduate School of Engineering, Osaka Prefecture University
Bibliographic Information
- Other Title
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- P-8 有害性微生物の超音波による殺菌
Description
We have investigated the inactivation of Saccharomyces cerevisiae and Cryptosporidium parvum by ultrasonic irradiation. Cryptosporidium parvum is one of the most serious poisonous protozoa that causes the waterborne disease and has high resistance to chlorine because of the hard oosyst. After ultrasonic irradiation, the viability of Saccharomyces cerevisiae was observed by the colony counting technique, and that of Cryptosporidium parvum was evaluated by the infectivity test using mice. In this study, the flow ultrasonic reactor with several frequencies (23.7, 44.6, 98.7, 144, 168 kHz) was used for the irradiation of ultrasound. The influence of the height of the reflector on the formation of OH radical and the inactivation of yeast cells was investigated at each frequency in batch system. The sonolytic inactivation of Cryptosporidium parvum was carried out with batch and flow systems at a sound frequency of 23.7 kHz. The addition of NaClO (1 ppm) to the suspension on the infectivity test was found to be effective, suggesting the oosyst might be damaged by the shock wave induced from the cavitation.
Journal
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- Proceedings of the Annual Meeting of the Japan Society of Sonochemistry
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Proceedings of the Annual Meeting of the Japan Society of Sonochemistry 11 (0), 52-54, 2002
Japan Society of Sonochemistry
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Details 詳細情報について
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- CRID
- 1390282681027848576
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- NII Article ID
- 110009710189
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- ISSN
- 24241512
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed
