Optimization of sampling strategy to determine pathogen removal efficacy of activated sludge treatment plant

Sidhu, Jatinder P. S., Ahmed, Warish, Palmer, Andrew, Smith, Kylie, Hodgers, Leonie and Toze, Simon (2017) Optimization of sampling strategy to determine pathogen removal efficacy of activated sludge treatment plant. Environmental Science and Pollution Research, 24 23: 19001-19010. doi:10.1007/s11356-017-9557-5

Author Sidhu, Jatinder P. S.
Ahmed, Warish
Palmer, Andrew
Smith, Kylie
Hodgers, Leonie
Toze, Simon
Title Optimization of sampling strategy to determine pathogen removal efficacy of activated sludge treatment plant
Journal name Environmental Science and Pollution Research   Check publisher's open access policy
ISSN 1614-7499
Publication date 2017-08-01
Sub-type Article (original research)
DOI 10.1007/s11356-017-9557-5
Open Access Status Not yet assessed
Volume 24
Issue 23
Start page 19001
End page 19010
Total pages 10
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Subject 2304 Environmental Chemistry
2310 Pollution
2307 Health, Toxicology and Mutagenesis
Abstract Large-scale wastewater schemes rely on multi-barrier approach for the production of safe and sustainable recycled water. In multi-barrier wastewater reclamation systems, conventional activated sludge process (ASP) often constitutes a major initial treatment step. The main aim of this research was to determine most appropriate sampling approach to establish pathogen removal efficacy of ASP. The results suggest that ASP is capable of reducing human adenovirus (HAdV) and polyomavirus (HPyV) by up to 3 log10. The virus removal data suggests that HAdV removal is comparable to somatic bacteriophage belonging to Microviridae family. Due to the high removal of Escherichia coli (>3 log10) and very poor correlation with the enteric virus, it is not recommended that E. coli be used as a surrogate for enteric virus removal. The results also demonstrated no statistically significant differences (t test, P > 0.05) in calculated log removal values (LRVs) for HAdV, HPyV, and Microviridae from samples collected on hydraulic retention time (HRT) or simultaneous paired samples collected for influent and effluent. This indicates that a more practical approach of simultaneous sampling for influent and effluent could be used to determine pathogen removal efficiency of ASP. The results also suggest that a minimum of 10, preferably 20 samples, are required to fully capture variability in the removal of virus. In order to cover for the potential seasonal prevalence of viruses such as norovirus and rotavirus, sampling should be spread across all seasons.
Keyword Activated sludge process
Water reuse
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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