Journal
BIORESOURCE TECHNOLOGY
Volume 144, Issue -, Pages 652-657Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.07.034
Keywords
Sewage sludge; Electron beam; Inactivation; Pathogens; Indicator organisms
Funding
- Water Environment Research Foundation
- Texas A&M AgriLife Research Hatch grant [H8708]
- IAEA
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Microbial pathogens in municipal sewage sludges need to be inactivated prior to environmental disposal. The efficacy of high energy (10 MeV) e-beam irradiation to inactivate a variety of selected microbial pathogens and indicator organisms in aerobically and anaerobically digested sewage sludge was evaluated. Both bacterial and viral pathogens and indicator organisms are susceptible to e-beam irradiation. However, as expected there was a significant difference in their respective e-beam irradiation sensitivity. Somatic coliphages, bacterial endospores and enteric viruses were more resistant compared to bacterial pathogens. The current US EPA mandated 10 kGy minimum dose was capable of achieving significant reduction of both bacterial and viral pathogens. Somatic coliphages can be used as a microbial indicator for monitoring e-beam processes in terms of pathogen inactivation in sewage sludges. (C) 2013 Elsevier Ltd. All rights reserved.
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