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Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki

Journal Article:

Abstract

To study the utilization of the photochemical sterilization of thermoduric bacterial spores B. stearothermophilus with photocatalysis of TiO2 particles, light irradiation experiments are conducted under various operational conditions. TiO2 particles and dissolved oxygen resulting from aeration must coexist to accelerate the rate of spore sterilization under light irradiation of a high pressure mercury lamp. The sterilization rate increases with larger average light intensity in the reactor, and it is estimated that the dissolved oxygen contributes to the formation of oxidative radicals which become the attacking species. The maximal rate of spore sterilization is obtained under the condition of TiO2 concentration of 5[times]10[sup -2]kg[center dot]m[sup -3]. By combining a second-order rate equation, wherein the spores' death caused by the oxidative radicals formed by TiO2 photocatalysis is taken into consideration, and single-hit multitarget model, wherein the target damaged by the oxidizer in the spores is assumed, the sterilization velocity can be described well, and the effect of light intensity and the obtained rate parameters are correlated well. 13 refs., 7 figs., 3 tabs.
Authors:
Tone, S; Taya, M; Kato, S; Horie, Y; Ashikaga, Y; [1]  Joo, Hyunkyu [2] 
  1. Osaka Univ., Osaka (Japan). Faculty of Engineering and Science
  2. Konkuk Univ., Seoul (Korea, Republic of)
Publication Date:
Nov 10, 1993
Product Type:
Journal Article
Reference Number:
NEDO-93-914014; EDB-94-147171
Resource Relation:
Journal Name: Kagaku Kogaku Ronbunshu; (Japan); Journal Volume: 19:6
Subject:
59 BASIC BIOLOGICAL SCIENCES; BACILLUS; STERILIZATION; SPORES; KINETICS; TITANIUM OXIDES; SLURRIES; BUBBLES; DISSOLVED GASES; NUMERICAL ANALYSIS; OXYGEN; PHOTOCHEMICAL REACTIONS; BACTERIA; CHALCOGENIDES; CHEMICAL REACTIONS; DISPERSIONS; ELEMENTS; FLUIDS; GASES; MATHEMATICS; MICROORGANISMS; MIXTURES; NONMETALS; OXIDES; OXYGEN COMPOUNDS; SOLUTES; SUSPENSIONS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 550200* - Biochemistry
OSTI ID:
7009805
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0386-216X; CODEN: KKRBAW
Submitting Site:
NEDO
Size:
Pages: 1149-1156
Announcement Date:

Journal Article:

Citation Formats

Tone, S, Taya, M, Kato, S, Horie, Y, Ashikaga, Y, and Joo, Hyunkyu. Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki. Japan: N. p., 1993. Web.
Tone, S, Taya, M, Kato, S, Horie, Y, Ashikaga, Y, & Joo, Hyunkyu. Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki. Japan.
Tone, S, Taya, M, Kato, S, Horie, Y, Ashikaga, Y, and Joo, Hyunkyu. 1993. "Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki." Japan.
@misc{etde_7009805,
title = {Kinetic analysis of photochemical sterilization of thermoduric bacterial spores in slurry of semiconductor catalyst particles with aeration. Handotai shokubai ryushi no tsuki kendakukei ni okeru tainetsusei saikin hoshi no hikari sakkin to sono sokudoronteki kaiseki}
author = {Tone, S, Taya, M, Kato, S, Horie, Y, Ashikaga, Y, and Joo, Hyunkyu}
abstractNote = {To study the utilization of the photochemical sterilization of thermoduric bacterial spores B. stearothermophilus with photocatalysis of TiO2 particles, light irradiation experiments are conducted under various operational conditions. TiO2 particles and dissolved oxygen resulting from aeration must coexist to accelerate the rate of spore sterilization under light irradiation of a high pressure mercury lamp. The sterilization rate increases with larger average light intensity in the reactor, and it is estimated that the dissolved oxygen contributes to the formation of oxidative radicals which become the attacking species. The maximal rate of spore sterilization is obtained under the condition of TiO2 concentration of 5[times]10[sup -2]kg[center dot]m[sup -3]. By combining a second-order rate equation, wherein the spores' death caused by the oxidative radicals formed by TiO2 photocatalysis is taken into consideration, and single-hit multitarget model, wherein the target damaged by the oxidizer in the spores is assumed, the sterilization velocity can be described well, and the effect of light intensity and the obtained rate parameters are correlated well. 13 refs., 7 figs., 3 tabs.}
journal = {Kagaku Kogaku Ronbunshu; (Japan)}
volume = {19:6}
journal type = {AC}
place = {Japan}
year = {1993}
month = {Nov}
}