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

2022Journal article Restricted access
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dc.contributor.authorSantos, Andreia F.
dc.contributor.authorAlvarenga, Paula
dc.contributor.authorGando-Ferreira, Licínio M.
dc.date.accessioned2023-01-11T18:27:36Z
dc.date.available2023-01-11T18:27:36Z
dc.date.issued2022
dc.description.abstractThis 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSantos, 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, 100646pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.scp.2022.100646pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/26832
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationPOCI-01-0247- FEDER- 033662pt_PT
dc.relationRecyP – Sustainable production of biofertilizers by recycling phosphorus from wastewater treatment plants
dc.relationChemical Process Engineering and Forest Products Research Centre
dc.relationLinking Landscape, Environment, Agriculture and Food
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectsewage sludgept_PT
dc.subjectrespirometric activitypt_PT
dc.subjectfertilizerspt_PT
dc.subjectcircular economypt_PT
dc.titleAgronomic valorization of sewage sludge: The potential of thermal drying to achieve sanitation and biological stabilitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleRecyP – Sustainable production of biofertilizers by recycling phosphorus from wastewater treatment plants
oaire.awardTitleChemical Process Engineering and Forest Products Research Centre
oaire.awardTitleLinking Landscape, Environment, Agriculture and Food
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//2020.08213.BD/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00102%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04129%2F2020/PT
oaire.citation.titleSustainable Chemistry and Pharmacypt_PT
oaire.citation.volume27pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameAlvarenga
person.familyNameGando-Ferreira
person.givenNamePaula
person.givenNameLicínio
person.identifierK-9083-2017
person.identifier.ciencia-idEA16-C2AD-D854
person.identifier.ciencia-id3813-C2B2-C68D
person.identifier.orcid0000-0002-3225-3358
person.identifier.orcid0000-0003-0739-1238
person.identifier.ridA-7085-2012
person.identifier.scopus-author-id16174357800
person.identifier.scopus-author-id35607900900
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7b078a5f-1516-4f32-8a46-334150ab7506
relation.isAuthorOfPublication954b522f-652b-4570-bc52-f09c121d492c
relation.isAuthorOfPublication.latestForDiscovery7b078a5f-1516-4f32-8a46-334150ab7506
relation.isProjectOfPublication67d17ddd-2dec-4733-ac81-9eaff24ed33c
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