Effect of Cell Adsorption on Photosterilization of Escherichia coli over Titanium Dioxide-Activated Charcoal Granules

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yasuhiko Horie¹  Seiji Tone¹  Masahito Taya¹ 

[1] Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University

关键词: Biochemical Engineering;    Photocatalytic Sterilization;    Escherichia coli;    Titanium Dioxide Immobilization;    Activated Charcoal;    Cell Adsorption;   

DOI  :  10.1252/jcej.31.922

来源: Maruzen Company Ltd

【 摘 要 】

References(14)Cited-By(16)TiO2 particles were immobilized on activated charcoal granules by means of a sol-gel method to use as a photosterilization catalyst capable of adsorbing microbial cells. The amounts of Escherichia coli cells adsorbed to the TiO2-immobilized activated charcoal (T/AC) granules were determined at temperatures of 288 to 303 K, and the maximum and minimum amounts of adsorbed cells were obtained at 288 and 293 K, respectively. At a temperature of 298 K, the relation between the amounts of adsorbed and suspended cells can be expressed by the Freundlich adsorption isotherm in the range of T/AC concentrations of 0.1 to 1.0 kg/m3. Under light irradiation with a black light fluorescent lamp, sterilization of E. coli cells was carried out in the slurry of T/AC granules at temperatures of 288 to 303 K and T/AC concentrations of 0 to 0.4 kg/m3. The sterilization rates changes depending on the temperatures, and the highest and lowest rates are obtained at 288 and 293 K, respectively. The apparent sterilization rate constants are determined on the basis of a series-event model under various sterilization conditions. The rate constants can be correlated with the concentration of T/AC granules by taking into account the adsorption of cells to the T/AC granules.

【 授权许可】

Unknown