The Sterilization of Suspensions Contaminated with Microorganisms Using Ultrasound Irradiation
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概要
- 論文の詳細を見る
We investigated the influence of suspended particles on the sterilization efficiency of ultrasound wave applied to microbial suspensions. A microbial solution containing $2.0\times 10^{2}$ cfu/ml of Bacillus bacteria but no suspended particles was sterilized more efficiently by 28 kHz irradiation inducing a strong impact-like physical action compared to 200 kHz irradiation inducing a strong chemical reaction through the generation of radicals and heat. This sterilization effect was enhanced by the suspension of silicon dioxide or green tuff when irradiated at 28 kHz. However, the irradiation of green tuff microbial suspension at 200 kHz resulted in a remarkable decrease in the sterilization efficiency. This reduction was caused by divalent iron in green tuff reacting with radicals generated by 200 kHz irradiation, thus reducing the amount of radicals used for sterilization. Our results suggest that 28 kHz ultrasound irradiation is optimal for the sterilization of microbial suspensions.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2010-07-25
著者
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Nakamura Takashi
Graduate School Of Engineering Osaka University
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Hosokawa Ryouta
Graduate School of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Okawa Hirokazu
Graduate School of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Saito Tomonao
Graduate School of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Kawamura Youhei
Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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Sugawara Katsuyasu
Graduate School of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Kawamura Youhei
Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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