Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability

Detalhes bibliográficos
Autor(a) principal: Santos, Andreia F.
Data de Publicação: 2022
Outros Autores: Alvarenga, Paula, Gando-Ferreira, Licínio M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/26832
Resumo: This work aims to contribute to the discussion of using a waste (sewage sludge) to obtain a valuable product (organic-rich fertilizer), based on a circular economy perspective. The compo- sition of sewage sludge (SS) was considered, highlighting important characteristics as raw ma- terial for fertilizer production (e.g., macronutrients, microbiological contamination, phytotoxicity). Particularly, the biological stability of SS was evaluated measuring the oxygen uptake rate (OUR) using the Oxitop® method, and the phytotoxicity using germination tests. The potential of thermal drying to stabilize the SS was evaluated at two temperatures (100 and 130◦C). The results showed that the organic matter (OM), N, and P levels are within the range of interest for agronomic valorization, while the content of some potentially toxic metals (e.g., Zn and Cu) may exceed the legal limits. The phytotoxicity assessment showed that raw SS samples negatively impacted the germination phase. Concerning the biological stability, results showed that raw anaerobic digested samples were characterized by OUR values above 50 mmol O2/kg OM.h (the limit for stable SS). Although thermal treatment of SS at 100 and 130◦C eliminated pathogens and significantly stabilized SS to OUR values below 50 mmol O2/kg OM.h, it was not enough to reach the limit established for a stable fertilizer (25 mmol O2/kg OM.h). Globally, SS has potential for soil application, within the scope of circular economy, but it is essential to control its microbiological contamination and stability.
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spelling Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stabilitysewage sludgerespirometric activityfertilizerscircular economyThis work aims to contribute to the discussion of using a waste (sewage sludge) to obtain a valuable product (organic-rich fertilizer), based on a circular economy perspective. The compo- sition of sewage sludge (SS) was considered, highlighting important characteristics as raw ma- terial for fertilizer production (e.g., macronutrients, microbiological contamination, phytotoxicity). Particularly, the biological stability of SS was evaluated measuring the oxygen uptake rate (OUR) using the Oxitop® method, and the phytotoxicity using germination tests. The potential of thermal drying to stabilize the SS was evaluated at two temperatures (100 and 130◦C). The results showed that the organic matter (OM), N, and P levels are within the range of interest for agronomic valorization, while the content of some potentially toxic metals (e.g., Zn and Cu) may exceed the legal limits. The phytotoxicity assessment showed that raw SS samples negatively impacted the germination phase. Concerning the biological stability, results showed that raw anaerobic digested samples were characterized by OUR values above 50 mmol O2/kg OM.h (the limit for stable SS). Although thermal treatment of SS at 100 and 130◦C eliminated pathogens and significantly stabilized SS to OUR values below 50 mmol O2/kg OM.h, it was not enough to reach the limit established for a stable fertilizer (25 mmol O2/kg OM.h). Globally, SS has potential for soil application, within the scope of circular economy, but it is essential to control its microbiological contamination and stability.ElsevierRepositório da Universidade de LisboaSantos, Andreia F.Alvarenga, PaulaGando-Ferreira, Licínio M.2023-01-11T18:27:36Z20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/26832engSantos, A. F., Alvarenga, P., Gando-Ferreira, L. M., & Quina, M. J. (2022). Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability. Sustainable Chemistry and Pharmacy: 27, 100646https://doi.org/10.1016/j.scp.2022.100646metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:56:15Zoai:www.repository.utl.pt:10400.5/26832Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:10:24.076842Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
title Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
spellingShingle Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
Santos, Andreia F.
sewage sludge
respirometric activity
fertilizers
circular economy
title_short Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
title_full Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
title_fullStr Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
title_full_unstemmed Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
title_sort Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability
author Santos, Andreia F.
author_facet Santos, Andreia F.
Alvarenga, Paula
Gando-Ferreira, Licínio M.
author_role author
author2 Alvarenga, Paula
Gando-Ferreira, Licínio M.
author2_role author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Santos, Andreia F.
Alvarenga, Paula
Gando-Ferreira, Licínio M.
dc.subject.por.fl_str_mv sewage sludge
respirometric activity
fertilizers
circular economy
topic sewage sludge
respirometric activity
fertilizers
circular economy
description This work aims to contribute to the discussion of using a waste (sewage sludge) to obtain a valuable product (organic-rich fertilizer), based on a circular economy perspective. The compo- sition of sewage sludge (SS) was considered, highlighting important characteristics as raw ma- terial for fertilizer production (e.g., macronutrients, microbiological contamination, phytotoxicity). Particularly, the biological stability of SS was evaluated measuring the oxygen uptake rate (OUR) using the Oxitop® method, and the phytotoxicity using germination tests. The potential of thermal drying to stabilize the SS was evaluated at two temperatures (100 and 130◦C). The results showed that the organic matter (OM), N, and P levels are within the range of interest for agronomic valorization, while the content of some potentially toxic metals (e.g., Zn and Cu) may exceed the legal limits. The phytotoxicity assessment showed that raw SS samples negatively impacted the germination phase. Concerning the biological stability, results showed that raw anaerobic digested samples were characterized by OUR values above 50 mmol O2/kg OM.h (the limit for stable SS). Although thermal treatment of SS at 100 and 130◦C eliminated pathogens and significantly stabilized SS to OUR values below 50 mmol O2/kg OM.h, it was not enough to reach the limit established for a stable fertilizer (25 mmol O2/kg OM.h). Globally, SS has potential for soil application, within the scope of circular economy, but it is essential to control its microbiological contamination and stability.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-01-01T00:00:00Z
2023-01-11T18:27:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/26832
url http://hdl.handle.net/10400.5/26832
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Santos, A. F., Alvarenga, P., Gando-Ferreira, L. M., & Quina, M. J. (2022). Agronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stability. Sustainable Chemistry and Pharmacy: 27, 100646
https://doi.org/10.1016/j.scp.2022.100646
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eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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