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Variability analysis of pathogen and indicator loads from urban sewer systems along a river.
Water Sci Technol. 2009; 59(2):203-12.WS

Abstract

The pathogen loads within surface waters originating from urban wastewater sources needs to be assessed to support drinking water risk estimations and optimal selection of risk reduction measures. Locally reported discharges from sewer systems (>100,000 persons connected) were used to simulate the potential microbial loads into the Göta älv river, Sweden. Using Monte Carlo simulations, the median and 95% percentile (i.e. worst case) of total microbial load from wastewater treatment plants, sewer network overflows and emergency discharges were assessed and presented for dry and wet weather conditions. Wastewater treatment plants with secondary treatment represented a major source of E. coli, norovirus, Giardia and Cryptosporidium. During wet weather, comparably high microbial loads were found for sewer overflows due to heavy rains. Substantial loads were also associated with an incident of the emergency discharge of untreated wastewater. Simulated river water concentrations of faecal indicators (E. coli, sulfite reducing clostridia, somatic coliphages) and pathogens (norovirus, Giardia, Cryptosporidium) were confirmed by river sampling data, suggesting that urban wastewater is the major microbial source for this river.

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Authors+Show Affiliations

Aström J
Department of Civil and Environmental Engineering, Water Environment Technology, Chalmers University of Technology, SE-412 96, Göteborg, Sweden. johan.l.astrom@chalmers.se
Pettersson TJ
No affiliation info available
Stenström TA
No affiliation info available
Bergstedt O
No affiliation info available

MeSH

AnimalsClostridiumColiphagesCryptosporidiumEscherichia coliGiardiaRiversSewageSwedenWater Supply

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19182329

Citation

Aström, J, et al. "Variability Analysis of Pathogen and Indicator Loads From Urban Sewer Systems Along a River." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 59, no. 2, 2009, pp. 203-12.
Aström J, Pettersson TJ, Stenström TA, et al. Variability analysis of pathogen and indicator loads from urban sewer systems along a river. Water Sci Technol. 2009;59(2):203-12.
Aström, J., Pettersson, T. J., Stenström, T. A., & Bergstedt, O. (2009). Variability analysis of pathogen and indicator loads from urban sewer systems along a river. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 59(2), 203-12. https://doi.org/10.2166/wst.2009.860
Aström J, et al. Variability Analysis of Pathogen and Indicator Loads From Urban Sewer Systems Along a River. Water Sci Technol. 2009;59(2):203-12. PubMed PMID: 19182329.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Variability analysis of pathogen and indicator loads from urban sewer systems along a river. AU - Aström,J, AU - Pettersson,T J R, AU - Stenström,T A, AU - Bergstedt,O, PY - 2009/2/3/entrez PY - 2009/2/3/pubmed PY - 2009/4/1/medline SP - 203 EP - 12 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 59 IS - 2 N2 - The pathogen loads within surface waters originating from urban wastewater sources needs to be assessed to support drinking water risk estimations and optimal selection of risk reduction measures. Locally reported discharges from sewer systems (>100,000 persons connected) were used to simulate the potential microbial loads into the Göta älv river, Sweden. Using Monte Carlo simulations, the median and 95% percentile (i.e. worst case) of total microbial load from wastewater treatment plants, sewer network overflows and emergency discharges were assessed and presented for dry and wet weather conditions. Wastewater treatment plants with secondary treatment represented a major source of E. coli, norovirus, Giardia and Cryptosporidium. During wet weather, comparably high microbial loads were found for sewer overflows due to heavy rains. Substantial loads were also associated with an incident of the emergency discharge of untreated wastewater. Simulated river water concentrations of faecal indicators (E. coli, sulfite reducing clostridia, somatic coliphages) and pathogens (norovirus, Giardia, Cryptosporidium) were confirmed by river sampling data, suggesting that urban wastewater is the major microbial source for this river. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/19182329/Variability_analysis_of_pathogen_and_indicator_loads_from_urban_sewer_systems_along_a_river_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2009.860 DB - PRIME DP - Unbound Medicine ER -