Journal article
The efficiency of ozonated water from a water treatment plant to inactivate Cryptosporidium oocysts during two seasonal temperatures
Journal of water and health, Vol.5(3), pp.433-440
2007
Abstract
We investigated the efficiency of residual ozone from an advanced water treatment plant with an applied dose of 2.5 mg l-1 to inactivate viable Cryptosporidium oocysts during summer (i.e. 24°C) and winter (i.e. 18.9°C) in Queensland, Australia. Containers for sample collection were inoculated with 1,000 oocysts l-1 and filled with ozonated water. Ozone residual concentrations were measured at 0, 5 and 10 min intervals. Viability was determined by excystation. Non-ozonated water from the plant, trip and laboratory controls were also analysed. The applied ozone dose of 2.5 mg l-1 produced an immediate residual concentration of 1.25 mg 1-1 at 24°C and 1.34 mg 1-1 at 18.9°C in unseeded samples. The initial ozone residual in seeded containers was 1.22±0.03 mg 1-1 at 24°C and 1.37±0.04 mg 1-1 at 18.9°C. There was a gradual increase in inactivation of oocysts, with 49% of oocysts inactivated at 0 min to 92% after 10 min at 24°C and 57% at 0 min to 92.8% at 10 min at 18.9°C.
Details
- Title
- The efficiency of ozonated water from a water treatment plant to inactivate Cryptosporidium oocysts during two seasonal temperatures
- Authors
- Tracey D Wohlsen (Author) - University of the Sunshine Coast - Faculty of Science, Health and EducationS Stewart (Author) - Aquagen, Water and Renewable EnergyP Aldridge (Author) - Aquagen, Water and Renewable EnergyJ Bates (Author) - Queensland Health Scientific ServicesB Gray (Author) - Queensland Health Scientific ServicesMohammad Katouli (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
- Publication details
- Journal of water and health, Vol.5(3), pp.433-440
- Publisher
- IWA Publishing
- Date published
- 2007
- DOI
- 10.2166/wh.2007.039
- ISSN
- 1477-8920
- Organisation Unit
- Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Science, Technology and Engineering; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 99449689302621
- Output Type
- Journal article
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