UV Disinfection sensitivity index of spores or protozoa: A model to predict the required fluence of spores or protozoa
Article
Article Title | UV Disinfection sensitivity index of spores or protozoa: A model to predict the required fluence of spores or protozoa |
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ERA Journal ID | 4696 |
Article Category | Article |
Authors | Wang, Zhao, Tang, Walter Z., Sillanpää, Mika and Li, Jinze |
Journal Title | Water Science and Technology |
Journal Citation | 86 (11), pp. 2820-2833 |
Number of Pages | 14 |
Year | 2022 |
Publisher | IWA Publishing |
Place of Publication | United Kingdom |
ISSN | 0273-1223 |
1996-9732 | |
Digital Object Identifier (DOI) | https://doi.org/10.2166/wst.2022.391 |
Web Address (URL) | https://iwaponline.com/wst/article/86/11/2820/92199/UV-Disinfection-sensitivity-index-of-spores-or |
Abstract | During UV disinfection, the required UV dose in terms of fluence depends upon the species of bacteria spore and protozoa. To rank their UV disinfection sensitivity, spore sensitivity index (SPSI) and protozoan sensitivity index (PSI) are defined. For spores, shoulder effect exists, therefore, SPSI is defined as the ratio between the ki of any spores for the linear portion of the dose response curve to the kir of Bacillus subtilis as the reference spore. After statistical analysis, the fluence of any spore can be predicted by SPSI through equation, H = (0.8358 ± 0.126)*LogI*SPSI + H0. PSI is defined as the ratio between the inactivation rate constants of a protozoa in reference to that of Cryptosporidium parvum. The equation predicting the fluence of any protozoa in reference to Cryptosporidium parvum is: H = 107.45*(3.86 ± 2.68)*LogI/PSI. Two regression equations suggest that protozoa require significantly higher UV dose than bacteria spores. |
Keywords | spore; Bacillus subtilis and Cryptosporidium parvum as reference; protozoan; sensitivity index; UV disinfection |
Byline Affiliations | Lappeenranta University of Technology (LUT), Finland |
Florida International University, United States | |
Duy Tan University, Vietnam | |
University of Southern Queensland | |
University of Johannesburg, South Africa |
https://research.usq.edu.au/item/z02y0/uv-disinfection-sensitivity-index-of-spores-or-protozoa-a-model-to-predict-the-required-fluence-of-spores-or-protozoa
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