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Description: Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and...
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects
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Description: Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and...
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects

Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects

Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects

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Description: Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and...
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects
Abstract
Recent studies have indicated that Ascaris ova and enteric viruses may be more rapidly inactivated in thermophilic anaerobic digestion than established by the general time/temperature standards for heat inactivation of pathogens in biosolids, and that bacteria may be inactivated more slowly. Additionally, because the concentrations of Ascaris ova and enteric viruses are often present at such low levels in digester influents, a surrogate measure of their inactivation would be useful for monitoring full-scale processes. In this study, rapid inactivation of Ascaris ova and enteric viruses was observed within 1 hour at 51°C or higher temperatures in 250 mL batch tests of digester solids. Male-specific coliphages were the most promising surrogate organism for enteric viruses. None of the studied organisms were appropriate surrogates for Ascaris ova at all temperatures, but if the process temperature can be established as 51°C or higher, enteric bacteria inactivation may be indicative of Ascaris ova inactivation.
Recent studies have indicated that Ascaris ova and enteric viruses may be more rapidly inactivated in thermophilic anaerobic digestion than established by the general time/temperature standards for heat inactivation of pathogens in biosolids, and that bacteria may be inactivated more slowly. Additionally, because the concentrations of Ascaris ova and enteric...
Author(s)
Zachary S CarrollSharon C Long
SourceProceedings of the Water Environment Federation
SubjectResearch Article
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Sep, 2015
ISSN1938-6478
DOI10.2175/193864715819541404
Volume / Issue2015 / 11
Content sourceWEFTEC
Copyright2015
Word count163

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Description: Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and...
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects
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Description: Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and...
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects
Abstract
Recent studies have indicated that Ascaris ova and enteric viruses may be more rapidly inactivated in thermophilic anaerobic digestion than established by the general time/temperature standards for heat inactivation of pathogens in biosolids, and that bacteria may be inactivated more slowly. Additionally, because the concentrations of Ascaris ova and enteric viruses are often present at such low levels in digester influents, a surrogate measure of their inactivation would be useful for monitoring full-scale processes. In this study, rapid inactivation of Ascaris ova and enteric viruses was observed within 1 hour at 51°C or higher temperatures in 250 mL batch tests of digester solids. Male-specific coliphages were the most promising surrogate organism for enteric viruses. None of the studied organisms were appropriate surrogates for Ascaris ova at all temperatures, but if the process temperature can be established as 51°C or higher, enteric bacteria inactivation may be indicative of Ascaris ova inactivation.
Recent studies have indicated that Ascaris ova and enteric viruses may be more rapidly inactivated in thermophilic anaerobic digestion than established by the general time/temperature standards for heat inactivation of pathogens in biosolids, and that bacteria may be inactivated more slowly. Additionally, because the concentrations of Ascaris ova and enteric...
Author(s)
Zachary S CarrollSharon C Long
SourceProceedings of the Water Environment Federation
SubjectResearch Article
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Sep, 2015
ISSN1938-6478
DOI10.2175/193864715819541404
Volume / Issue2015 / 11
Content sourceWEFTEC
Copyright2015
Word count163

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Zachary S Carroll# Sharon C Long. Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects. Alexandria, VA 22314-1994, USA: Water Environment Federation, 2018. Web. 18 Oct. 2025. <https://www.accesswater.org?id=-277794CITANCHOR>.
Zachary S Carroll# Sharon C Long. Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects. Alexandria, VA 22314-1994, USA: Water Environment Federation, 2018. Accessed October 18, 2025. https://www.accesswater.org/?id=-277794CITANCHOR.
Zachary S Carroll# Sharon C Long
Pathogens and Surrogate Organisms in Anaerobic Digestion - Temperature, Time, and Ammonia Effects
Access Water
Water Environment Federation
December 22, 2018
October 18, 2025
https://www.accesswater.org/?id=-277794CITANCHOR