Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge

Medium-sized wastewater treatment plants are considered too small to implement anaerobic digestion technologies and too large for extensive treatments. A promising option as a sewage sludge reduction method is the inclusion of anoxic time exposures. In the present study, three different anoxic time...

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Autores: Rodríguez Pérez, S., González Fermoso, Fernando, Arnáiz Franco, Carmen
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/166790
Acceso en línea:https://hdl.handle.net/11441/166790
https://doi.org/10.2166/wst.2016.247
Access Level:acceso abierto
Palabra clave:Active biomass
Anoxic periods
Biomass activity
Biomass production
Filamentous bacteria
Protozoa population
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spelling Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludgeRodríguez Pérez, S.González Fermoso, FernandoArnáiz Franco, CarmenActive biomassAnoxic periodsBiomass activityBiomass productionFilamentous bacteriaProtozoa populationMedium-sized wastewater treatment plants are considered too small to implement anaerobic digestion technologies and too large for extensive treatments. A promising option as a sewage sludge reduction method is the inclusion of anoxic time exposures. In the present study, three different anoxic time exposures of 12, 6 and 4 hours have been studied to reduce sewage sludge production. The best anoxic time exposure was observed under anoxic/oxic cycles of 6 hours, which reduced 29.63% of the biomass production compared with the oxic control conditions. The sludge under different anoxic time exposures, even with a lower active biomass concentration than the oxic control conditions, showed a much higher metabolic activity than the oxic control conditions. Microbiological results suggested that both protozoa density and abundance of filamentous bacteria decrease under anoxic time exposures compared to oxic control conditions. The anoxic time exposures 6/6 showed the highest reduction in both protozoa density, 37.5%, and abundance of filamentous bacteria, 41.1%, in comparison to the oxic control conditions. The groups of crawling ciliates, carnivorous ciliates and filamentous bacteria were highly influenced by the anoxic time exposures. Protozoa density and abundance of filamentous bacteria have been shown as promising bioindicators of biomass production reduction.IWA PublishingIngeniería Química y Ambiental2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/166790https://doi.org/10.2166/wst.2016.247reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésWater Science and Technology, 74 (3), 595-605.https://iwaponline.com/wst/article-abstract/74/3/595/19410/Influence-of-different-anoxic-time-exposures-oninfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1667902026-06-17T12:51:07Z
dc.title.none.fl_str_mv Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
title Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
spellingShingle Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
Rodríguez Pérez, S.
Active biomass
Anoxic periods
Biomass activity
Biomass production
Filamentous bacteria
Protozoa population
title_short Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
title_full Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
title_fullStr Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
title_full_unstemmed Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
title_sort Influence of different anoxic time exposures on active biomass, protozoa and filamentous bacteria in activated sludge
dc.creator.none.fl_str_mv Rodríguez Pérez, S.
González Fermoso, Fernando
Arnáiz Franco, Carmen
author Rodríguez Pérez, S.
author_facet Rodríguez Pérez, S.
González Fermoso, Fernando
Arnáiz Franco, Carmen
author_role author
author2 González Fermoso, Fernando
Arnáiz Franco, Carmen
author2_role author
author
dc.contributor.none.fl_str_mv Ingeniería Química y Ambiental
dc.subject.none.fl_str_mv Active biomass
Anoxic periods
Biomass activity
Biomass production
Filamentous bacteria
Protozoa population
topic Active biomass
Anoxic periods
Biomass activity
Biomass production
Filamentous bacteria
Protozoa population
description Medium-sized wastewater treatment plants are considered too small to implement anaerobic digestion technologies and too large for extensive treatments. A promising option as a sewage sludge reduction method is the inclusion of anoxic time exposures. In the present study, three different anoxic time exposures of 12, 6 and 4 hours have been studied to reduce sewage sludge production. The best anoxic time exposure was observed under anoxic/oxic cycles of 6 hours, which reduced 29.63% of the biomass production compared with the oxic control conditions. The sludge under different anoxic time exposures, even with a lower active biomass concentration than the oxic control conditions, showed a much higher metabolic activity than the oxic control conditions. Microbiological results suggested that both protozoa density and abundance of filamentous bacteria decrease under anoxic time exposures compared to oxic control conditions. The anoxic time exposures 6/6 showed the highest reduction in both protozoa density, 37.5%, and abundance of filamentous bacteria, 41.1%, in comparison to the oxic control conditions. The groups of crawling ciliates, carnivorous ciliates and filamentous bacteria were highly influenced by the anoxic time exposures. Protozoa density and abundance of filamentous bacteria have been shown as promising bioindicators of biomass production reduction.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/166790
https://doi.org/10.2166/wst.2016.247
url https://hdl.handle.net/11441/166790
https://doi.org/10.2166/wst.2016.247
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Water Science and Technology, 74 (3), 595-605.
https://iwaponline.com/wst/article-abstract/74/3/595/19410/Influence-of-different-anoxic-time-exposures-on
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IWA Publishing
publisher.none.fl_str_mv IWA Publishing
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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