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Persistence of surrogates for high consequence viral and bacterial pathogens in a pilot-scale activated sludge treatment system.
Schupp, Donald A; Burdsall, Adam C; Silva, Rendahandi G; Heckman, John Lee; Krishnan, E Radha; Szabo, Jeffrey G; Magnuson, Matthew.
  • Schupp DA; APTIM Federal Services, Cincinnati, Ohio, United States of America.
  • Burdsall AC; Homeland Security and Materials Management Division, Center for Environmental Solutions and Emergency Response, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio, United States of America.
  • Silva RG; APTIM Federal Services, Cincinnati, Ohio, United States of America.
  • Heckman JL; APTIM Federal Services, Cincinnati, Ohio, United States of America.
  • Krishnan ER; APTIM Federal Services, Cincinnati, Ohio, United States of America.
  • Szabo JG; Homeland Security and Materials Management Division, Center for Environmental Solutions and Emergency Response, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio, United States of America.
  • Magnuson M; Homeland Security and Materials Management Division, Center for Environmental Solutions and Emergency Response, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio, United States of America.
PLoS One ; 17(10): e0275482, 2022.
Article in English | MEDLINE | ID: covidwho-2065138
ABSTRACT
The persistence of high consequence public health pathogens in a wastewater treatment system can significantly impact worker safety, as well as the public and downstream water bodies, particularly if the system is forced to shut down the treatment processes. This study utilizes organism viability to compare the persistence of three pathogen surrogates in wastewater using a pilot-scale activated sludge treatment (AST) system, operated to mimic treatment processes of large-scale plants. Bacillus globigii spores, surrogate for Bacillus anthracis, persisted in the AST system for at least a 50-day observation period leading to a possible steady condition far beyond the solid retention time for sludge particles. MS2 bacteriophage, surrogate for Poliovirus and other non-enveloped enteric viruses, was observed for up to 35 days after introduction, which largely and expectedly correlated to the measured solid retention time. Phi-6 bacteriophage, a surrogate for Ebola virus and other enveloped viruses, was detected for no more than 4 days after introduction, even though the AST system was operated to provide three times slower solids removal than for the other surrogates. This suggests Phi-6 is subject to inactivation under AST conditions rather than physical removal. These results may suggest similar persistence for the surrogated pathogens, leading to appropriate consequence management actions.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Sewage / Water Purification Type of study: Observational study / Prognostic study Language: English Journal: PLoS One Journal subject: Science / Medicine Year: 2022 Document Type: Article Affiliation country: Journal.pone.0275482

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Sewage / Water Purification Type of study: Observational study / Prognostic study Language: English Journal: PLoS One Journal subject: Science / Medicine Year: 2022 Document Type: Article Affiliation country: Journal.pone.0275482