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Inactivation of microorganisms in a flow‐through photoreactor with an immobilized TiO 2 layer
Author(s) -
Belháčová Lenka,
Krýsa Josef,
Geryk Josef,
Jirkovský Jaromír
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199902)74:2<149::aid-jctb2>3.0.co;2-q
Subject(s) - chemistry , microorganism , light intensity , volumetric flow rate , escherichia coli , kinetics , irradiation , bacteria , photochemistry , biochemistry , biology , optics , thermodynamics , physics , genetics , quantum mechanics , gene , nuclear physics
A laboratory flow‐through photoreactor with an immobilized layer of TiO 2 (total volume of the liquid 5000 cm 3 , photoactive area 60 cm long and 30 cm wide; irradiation source UV lamps Eversun, Osram, light intensity from 0.9 to 6.2×10 −9 Einstein cm −2 s −1 ) was tested for the inactivation of Escherichia coli (strain DH5α) and bacteriophage λNM1149. The kinetics of the deactivation were approximately first order and the initial reaction rate depended on the light intensity. At maximum intensity, the rate constants of the bacteria and viruses inactivation were 2.3×10 −4 and 7.2×10 −4 s −1 , respectively. Bacterial inactivation was also accomplished with solar excitation. © 1999 Society of Chemical Industry