Evaluation of Photocatalytic Sterilization Rates of Escherichia coli Cells in Titanium Dioxide with Various Light Sources

• Horie Yasuhiko

  Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University

• Taya Masahito

  Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University

• Tone Setsuji

  Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University

書誌事項

タイトル別名

• Evaluation of Photocatalytic Sterilization Rates of Escherichia coliCells in Titanium Dioxide Slurry Irradiated with Various Light Sources.
• Evaluation of Photocatalytic Sterilizat

抄録

Photocatalytic sterilization of Escherichia coli cells with TiO₂ particles is examined using a rectangular bubble-column reactor irradiated with three kinds of artificial light sources. The three types of used lamps were a black light fluorescent (BL-F) lamp, a blue actinic fluorescent (BA-F) lamp and a daylight fluorescent (DL-F) lamp. Under the conditions of TiO₂ concentration of 1 × 10^–2 kg/m³ and initial cell concentration of 1 × 10¹¹ cells/m³, average light intensities in the reactor were varied in the range of 0 to 22 W/m², 0 to 14 W/m² and 0 to 1.1 W/m² with the BL-F, BA-F and DL-F lamps, respectively. The apparent sterilization rate constants of E. coli cells for these lamps are determined on the basis of a series-event model, and are compared with those obtained in experiments with a high pressure mercury lamp. Irrespective of the examined lamps, the rate constants can be correlated with the light quantities absorbed by TiO₂ slurry, which are evaluated by taking into account both the dependency of absorbance of TiO₂ slurry on light wavelengths and the spectral distributions of light rays from the respective lamps. From the results obtained in experiments using the artificial light sources, the sterilization rate constants of E. coli under the sunlight can be predicted. The experimental data are in good agreement with the predicted results in the reactor illuminated with sunlight at average light intensities of 14 and 23 W/m².

収録刊行物

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 31 (4), 577-584, 1998

  公益社団法人 化学工学会

キーワード

• Biochemical Engineering
• Photocatalytic Sterilization
• <I>Escherichia coli</I>
• Titanium Dioxide
• Spectral Distribution

詳細情報

• CRID: 1390001204564296960
• NII論文ID: 10002066002
• NII書誌ID: AA00709658
• DOI: 10.1252/jcej.31.577
• COI: 1:CAS:528:DyaK1cXls1Kjsb8%3D
• ISSN: 18811299
• ISSN: 00219592
• NDL書誌ID: 4541601
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4541601
• Web Site: http://www.jstage.jst.go.jp/article/jcej/31/4/31_4_577/_pdf
• 本文言語コード: en
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• 抄録ライセンスフラグ: 使用不可