Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment

Soil Aquifer Treatment (SAT) is used to increase groundwater resources and enhance the water quality of wastewater treatment plant (WWTP) effluents. The resulting water quality needs to be assessed. In this study, we investigate attenuation pathways of nitrogen (N) compounds (predominantly NH4+) fro...

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Autores: Abu, Alex, Carrey, Raúl, Valhondo, Cristina, Domènech, Cristina, Soler, Albert, Martínez-Landa, Lurdes, Diaz-Cruz, Silvia, Carrera, Jesús, Otero, Neus
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/278815
Acesso em linha:http://hdl.handle.net/10261/278815
https://api.elsevier.com/content/abstract/scopus_id/85136634839
Access Level:acceso abierto
Palavra-chave:Soil aquifer treatment
Denitrification
Enhanced biological denitrification
Isotopic fractionation
Nitrification
Permeable reactive barriers
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spelling Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatmentAbu, AlexCarrey, RaúlValhondo, CristinaDomènech, CristinaSoler, AlbertMartínez-Landa, LurdesDiaz-Cruz, SilviaCarrera, JesúsOtero, NeusSoil aquifer treatmentDenitrificationEnhanced biological denitrificationIsotopic fractionationNitrificationPermeable reactive barriersSoil Aquifer Treatment (SAT) is used to increase groundwater resources and enhance the water quality of wastewater treatment plant (WWTP) effluents. The resulting water quality needs to be assessed. In this study, we investigate attenuation pathways of nitrogen (N) compounds (predominantly NH4+) from a secondary treatment effluent in pilot SAT systems: both a conventional one (SAT-Control system) and one operating with a permeable reactive barrier (PRB) to provide extra dissolved organic carbon to the recharged water. The goal is to evaluate the effectiveness of the two systems regarding N compounds by means of chemical and isotopic tools. Water chemistry (NO3-, NH4+, Non-Purgeable Dissolved Organic Carbon (NPDOC), and O2) and isotopic composition of NO3- (ẟ15N-NO3- and ẟ18O-NO3-) and NH4+ (ẟ15N-NH4+) were monitored in the inflow and at three different sections and depths along the aquifer flow path. Chemical and isotopic results suggest that coupled nitrification-denitrification were the principal mechanisms responsible for the migration and distribution of inorganic N in the systems and that nitrification rate decreased with depth. At the end of the study period, 66% of the total N in the solution was removed in the SAT-PRB system and 69% in the SAT-Control system, measured at the outlet of the systems. The residual N in solution in the SAT-PRB system had an approximately equal proportion of N-NH4+ and N-NO3- while in the SAT-Control system, the residual N in solution was primarily N-NO3-. Isotopic data also confirmed complete NO3- degradation in the systems from July to September with the possibility of mixing newly generated NO3- with the residual NO3- in the substrate pool.The authors are grateful to Consorci de la Costa Brava Girona (CCBGi), the staff of the Palamós WWTP for their unconditional help, and the AGAUR-SGR2017-1485 research group. Abu Alex would like to thank the The Agency for Management of University and Research Grants of the Generalitat de Catalunya for the Ph.D. grant (2019 FI_B 01059) and the CCiT of University of Barcelona for the analytical support.Peer reviewedElsevier0000-0002-8639-82290000-0002-4009-54760000-0003-3331-4076Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/278815https://api.elsevier.com/content/abstract/scopus_id/85136634839reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésJournal of environmental managementhttps://doi.org/10.1016/j.jenvman.2022.115927Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2788152026-05-22T06:33:51Z
dc.title.none.fl_str_mv Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
title Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
spellingShingle Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
Abu, Alex
Soil aquifer treatment
Denitrification
Enhanced biological denitrification
Isotopic fractionation
Nitrification
Permeable reactive barriers
title_short Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
title_full Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
title_fullStr Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
title_full_unstemmed Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
title_sort Pathways and efficiency of nitrogen attenuation in wastewater effluent through soil aquifer treatment
dc.creator.none.fl_str_mv Abu, Alex
Carrey, Raúl
Valhondo, Cristina
Domènech, Cristina
Soler, Albert
Martínez-Landa, Lurdes
Diaz-Cruz, Silvia
Carrera, Jesús
Otero, Neus
author Abu, Alex
author_facet Abu, Alex
Carrey, Raúl
Valhondo, Cristina
Domènech, Cristina
Soler, Albert
Martínez-Landa, Lurdes
Diaz-Cruz, Silvia
Carrera, Jesús
Otero, Neus
author_role author
author2 Carrey, Raúl
Valhondo, Cristina
Domènech, Cristina
Soler, Albert
Martínez-Landa, Lurdes
Diaz-Cruz, Silvia
Carrera, Jesús
Otero, Neus
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv 0000-0002-8639-8229
0000-0002-4009-5476
0000-0003-3331-4076
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Soil aquifer treatment
Denitrification
Enhanced biological denitrification
Isotopic fractionation
Nitrification
Permeable reactive barriers
topic Soil aquifer treatment
Denitrification
Enhanced biological denitrification
Isotopic fractionation
Nitrification
Permeable reactive barriers
description Soil Aquifer Treatment (SAT) is used to increase groundwater resources and enhance the water quality of wastewater treatment plant (WWTP) effluents. The resulting water quality needs to be assessed. In this study, we investigate attenuation pathways of nitrogen (N) compounds (predominantly NH4+) from a secondary treatment effluent in pilot SAT systems: both a conventional one (SAT-Control system) and one operating with a permeable reactive barrier (PRB) to provide extra dissolved organic carbon to the recharged water. The goal is to evaluate the effectiveness of the two systems regarding N compounds by means of chemical and isotopic tools. Water chemistry (NO3-, NH4+, Non-Purgeable Dissolved Organic Carbon (NPDOC), and O2) and isotopic composition of NO3- (ẟ15N-NO3- and ẟ18O-NO3-) and NH4+ (ẟ15N-NH4+) were monitored in the inflow and at three different sections and depths along the aquifer flow path. Chemical and isotopic results suggest that coupled nitrification-denitrification were the principal mechanisms responsible for the migration and distribution of inorganic N in the systems and that nitrification rate decreased with depth. At the end of the study period, 66% of the total N in the solution was removed in the SAT-PRB system and 69% in the SAT-Control system, measured at the outlet of the systems. The residual N in solution in the SAT-PRB system had an approximately equal proportion of N-NH4+ and N-NO3- while in the SAT-Control system, the residual N in solution was primarily N-NO3-. Isotopic data also confirmed complete NO3- degradation in the systems from July to September with the possibility of mixing newly generated NO3- with the residual NO3- in the substrate pool.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/278815
https://api.elsevier.com/content/abstract/scopus_id/85136634839
url http://hdl.handle.net/10261/278815
https://api.elsevier.com/content/abstract/scopus_id/85136634839
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of environmental management
https://doi.org/10.1016/j.jenvman.2022.115927
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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