A study was undertaken to determine the potential inactivation rates of selected enteric microorganisms in captured urban stormwater within a constructed reedbed and in tertiary carbonated aquifer during an Aquifer Storage, Transfer and Recovery (ASTR) scheme. The study was undertaken in-situ in the constructed reedbed and aquifer using diffusion chambers. The results showed that all tested bacteria had one log10 reduction time of less than 6 and 2.5 days respectively in constructed reedbeds and aquifer, which suggests that presence of enteric bacteria in the recovered water is unlikely. However, adenovirus and Cryptosporidium oocysts showed lower inactivation rates with one log10 reduction times of more than 33 days in the constructed reedbeds. This means that the constructed reedbed with a mean residence time 10 days cannot be relied upon as an efficient treatment barrier for virus and protozoa. Storage of stormwater in aquifer with brackish water resulted in slow inactivation of enteric viruses over the 35 day incubation period with adenovirus and rotavirus showing slowest inactivation times (extrapolated T90 of >100 days). Cryptosporidium oocysts showed similar inactivation rate in the constructed reedbed and aquifer.
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Research Article|
September 01 2010
Pathogen inactivation during passage of stormwater through a constructed reedbed and aquifer transfer, storage and recovery
J. P. S. Sidhu
;
1
CSIRO Land and Water, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia QLD 4067, Australia
E-mail: Jatinder.Sidhu@csiro.au
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S. Toze
;
S. Toze
1
CSIRO Land and Water, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia QLD 4067, Australia4
School of Population Health, University of Queensland, Herston Road, Herston, Brisbane QLD 4006, Australia
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L. Hodgers
;
L. Hodgers
1
CSIRO Land and Water, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia QLD 4067, Australia
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M. Shackelton
;
M. Shackelton
2
CSIRO Centre for Environment and Life Sciences, Private Bag No 5, Wembley WA 6913, Australia
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K. Barry
;
K. Barry
3
CSIRO Land and Water, Private Bag 2, Glen Osmond SA 5064, Australia
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D. Page
;
D. Page
3
CSIRO Land and Water, Private Bag 2, Glen Osmond SA 5064, Australia
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P. Dillon
P. Dillon
3
CSIRO Land and Water, Private Bag 2, Glen Osmond SA 5064, Australia
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Water Sci Technol (2010) 62 (5): 1190-1197.
Citation
J. P. S. Sidhu, S. Toze, L. Hodgers, M. Shackelton, K. Barry, D. Page, P. Dillon; Pathogen inactivation during passage of stormwater through a constructed reedbed and aquifer transfer, storage and recovery. Water Sci Technol 1 September 2010; 62 (5): 1190–1197. doi: https://doi.org/10.2166/wst.2010.398
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J. P. S. Sidhu, S. Toze, L. Hodgers, M. Shackelton, K. Barry, D. Page, P. Dillon; Pathogen inactivation during passage of stormwater through a constructed reedbed and aquifer transfer, storage and recovery. Water Sci Technol 1 September 2010; 62 (5): 1190–1197. doi: https://doi.org/10.2166/wst.2010.398
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