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Photocatalytic disinfection of E coli in a UV/TiO 2 ‐immobilised optical‐fibre reactor
Author(s) -
Choi YongSuk,
Kim ByungWoo
Publication year - 2000
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 - 10.1002/1097-4660(200012)75:12<1145::aid-jctb341>3.0.co;2-x
Subject(s) - photocatalysis , slurry , optical fiber , residence time (fluid dynamics) , chemistry , light scattering , materials science , plug flow , chemical engineering , scattering , composite material , optics , catalysis , organic chemistry , physics , engineering , geotechnical engineering , thermodynamics
Photocatalytic disinfection using TiO 2 particles suspended in a reactor involves two major problems; the exponential decrease of light availability due to the scattering of UV light by particles themselves and the difficulty of recycling particles. To resolve these problems, scratched optical‐fibres, inserted in glass tubes were used to diffuse UV light uniformly in a reactor. Comparative disinfection studies using these optical‐fibres were done in both cases of suspended and immobilised photocatalysts. Disinfection capability with the immobilised photocatalysts at 4.9 µE s −1 dm −3 was twice that of the slurry reactor. Survival ratios of less than 0.2 were obtained with a residence time of 50 min and an initial cell concentration of 10000 cfu cm −3 in the 6 dm 3 plug‐flow type reactor. © 2000 Society of Chemical Industry