Disinfection Using Pressurized Carbon Dioxide Microbubbles to Inactivate <I>Escherichia coli</I>, Bacteriophage MS2 and T4
スポンサーリンク
概要
- 論文の詳細を見る
This study investigated the potential application of pressurized CO<SUB>2</SUB> for water disinfection. Under supporting high pressure, a high volume of CO<SUB>2</SUB> microbubbles were produced in a liquid environment. Specifically, the inactivation effects of CO<SUB>2</SUB> against <I>Escherichia coli</I>, bacteriophage MS2 and T4 were examined at equal pressures (0.3 - 0.9 MPa) and temperatures. The optimum conditions were found to be 0.7 MPa and an exposure time of 25 min. Under identical treatment conditions, a greater than 5.0 log reduction in <I>E. coli</I> was achieved, while over 3.0 log and nearly 4.0 log reductions were observed for phage MS2 and phage T4, respectively. Comparison of the inactivation effect of CO<SUB>2</SUB>, N<SUB>2</SUB>O, a common acid and buffer solution against phage MS2, revealed that the change in pH caused by CO<SUB>2</SUB> plays an important role in its virucidal effects. Moreover, the pumping cycle and depressurization rate contributed to the inhibition of microorganisms. Overall, the results of this study indicate that CO<SUB>2</SUB> has the potential for use as a disinfectant without the formation of by-products.
著者
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Imai Tsuyoshi
Division Of Thermonuclear Fusion Research Japan Atomic Energy Research Institute
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Yamamoto Koichi
Division of Cardiology, Sakurabashi Watanabe Hospital
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HIGUCHI Takaya
Division of Environmental Science and Engineering, Graduate School of Science and Engineering (Engineering), Yamaguchi University
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SEKINE Masahiko
Division of Civil and Environmental Engineering, Graduate School of Science and Engineering, Yamaguchi University, Japan
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KANNO Ariyo
Division of Civil and Environmental Engineering, Graduate School of Science and Engineering, Yamaguchi University, Japan
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LE Tuan
Division of Environmental Science and Engineering, Yamaguchi University, Japan
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KANNO Ariyo
Division of Civil and Environmental Engineering, Yamaguchi University, Japan
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VO Huy
Division of Environmental Science and Engineering, Yamaguchi University, Japan
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YAMAMOTO Hidenori
Division of Environmental Science and Engineering, Yamaguchi University, Japan
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IMAI Tsuyoshi
Division of Environmental Science and Engineering, Yamaguchi University, Japan
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