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Reducing pathogens in combined sewer overflows using performic acid.
Int J Hyg Environ Health. 2016 10; 219(7 Pt B):700-708.IJ

Abstract

Combined sewer overflows contribute significantly to pathogen loads in surface water. Some chemical disinfectants such as chlorine have proved to reduce the levels of microorganisms even in complex matrices such as wastewater in combined sewer systems; however, some of them release toxic by-products into water bodies and increase costs of plant maintenance and repair. In this study, we determined if performic acid (PFA) disinfection units can be operated at decentralized treatment facilities and reduce bacteria, viruses, and protozoan parasites in combined sewer overflows (CSOs). The PFA dosing unit at the inflow of a CSO storage tank dosed a fixed flow volume into the inflowing stormwater and, thus, concentrations varied between approximately 12-24mgl-1. The results showed a reduction of most hygienically relevant bacteria with mean removal efficiencies of 1.8log10 for Aeromonas spp. and 3.1log10 for E. coli. For viruses, however, reduction was only observed for somatic coliphages with 2.7log10. In this setting, PFA does not seem to be suitable to remove e.g. protozoan parasites such as Giardia lamblia. In terms of operation, dosing the substance is uncritical in decentralized facilities, but the PFA needs too much time to react with pathogens after being dosed into the overflow of CSO storage tanks and before dilution with surface water in most facilities.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Tondera K
Institute of Environmental Engineering of RWTH Aachen University (ISA), 52056 Aachen, Germany. Electronic address: tondera@isa.rwth-aachen.de.
Klaer K
Institute of Environmental Engineering of RWTH Aachen University (ISA), 52056 Aachen, Germany.
Koch C
Institute for Hygiene and Public Health (IHPH), University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany.
Hamza IA
Department of Hygiene, Social and Environmental Medicine, Ruhr-University Bochum (RUB), Universitaetsstr. 150, 44801 Bochum, Germany.
Pinnekamp J
Institute of Environmental Engineering of RWTH Aachen University (ISA), 52056 Aachen, Germany.

MeSH

BacteriaCryptosporidium parvumDNA, ViralDisinfectantsDisinfectionDrainage, SanitaryEnvironmental MonitoringFormatesGiardiaSewageVirusesWater Microbiology

Pub Type(s)

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

Language

eng

PubMed ID

27142128

Citation

Tondera, Katharina, et al. "Reducing Pathogens in Combined Sewer Overflows Using Performic Acid." International Journal of Hygiene and Environmental Health, vol. 219, no. 7 Pt B, 2016, pp. 700-708.
Tondera K, Klaer K, Koch C, et al. Reducing pathogens in combined sewer overflows using performic acid. Int J Hyg Environ Health. 2016;219(7 Pt B):700-708.
Tondera, K., Klaer, K., Koch, C., Hamza, I. A., & Pinnekamp, J. (2016). Reducing pathogens in combined sewer overflows using performic acid. International Journal of Hygiene and Environmental Health, 219(7 Pt B), 700-708. https://doi.org/10.1016/j.ijheh.2016.04.009
Tondera K, et al. Reducing Pathogens in Combined Sewer Overflows Using Performic Acid. Int J Hyg Environ Health. 2016;219(7 Pt B):700-708. PubMed PMID: 27142128.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reducing pathogens in combined sewer overflows using performic acid. AU - Tondera,Katharina, AU - Klaer,Kassandra, AU - Koch,Christoph, AU - Hamza,Ibrahim Ahmed, AU - Pinnekamp,Johannes, Y1 - 2016/04/22/ PY - 2015/12/06/received PY - 2016/04/14/revised PY - 2016/04/17/accepted PY - 2016/5/5/pubmed PY - 2017/6/16/medline PY - 2016/5/5/entrez KW - Bacteria KW - Combined sewer overflows KW - Disinfection KW - Parasites KW - Performic acid KW - Viruses SP - 700 EP - 708 JF - International journal of hygiene and environmental health JO - Int J Hyg Environ Health VL - 219 IS - 7 Pt B N2 - Combined sewer overflows contribute significantly to pathogen loads in surface water. Some chemical disinfectants such as chlorine have proved to reduce the levels of microorganisms even in complex matrices such as wastewater in combined sewer systems; however, some of them release toxic by-products into water bodies and increase costs of plant maintenance and repair. In this study, we determined if performic acid (PFA) disinfection units can be operated at decentralized treatment facilities and reduce bacteria, viruses, and protozoan parasites in combined sewer overflows (CSOs). The PFA dosing unit at the inflow of a CSO storage tank dosed a fixed flow volume into the inflowing stormwater and, thus, concentrations varied between approximately 12-24mgl-1. The results showed a reduction of most hygienically relevant bacteria with mean removal efficiencies of 1.8log10 for Aeromonas spp. and 3.1log10 for E. coli. For viruses, however, reduction was only observed for somatic coliphages with 2.7log10. In this setting, PFA does not seem to be suitable to remove e.g. protozoan parasites such as Giardia lamblia. In terms of operation, dosing the substance is uncritical in decentralized facilities, but the PFA needs too much time to react with pathogens after being dosed into the overflow of CSO storage tanks and before dilution with surface water in most facilities. SN - 1618-131X UR - https://www.unboundmedicine.com/medline/citation/27142128/Reducing_pathogens_in_combined_sewer_overflows_using_performic_acid_ DB - PRIME DP - Unbound Medicine ER -