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Piggery wastewater treatment by solar photo-Fenton coupled with microalgae production

2025-03Journal article Open access
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dc.contributor.authorFerreira, Alice
dc.contributor.authorAttar, Solaima Belachqer-El
dc.contributor.authorVillaro-Cos, Silvia
dc.contributor.authorCiardi, Martina
dc.contributor.authorSoriano-Molina, Paula
dc.contributor.authorLópez, Jose Luis Casas
dc.contributor.authorLafarga, Tomás
dc.contributor.authorSantos, Cláudia Marques dos
dc.contributor.authorAcién, F. Gabriel
dc.contributor.authorGouveia, Luisa
dc.date.accessioned2025-01-13T14:48:07Z
dc.date.available2025-01-13T14:48:07Z
dc.date.issued2025-03
dc.description.abstractABSTRACT: Pig farming generates highly polluted wastewater that requires effective treatment to minimize environmental damage. Microalgae can recover nutrients from piggery wastewater (PWW), but excessive nutrient and turbidity levels inhibit their growth. Solar photo-Fenton (PF) offer a sustainable and cost-effective pretreatment to allow microalgal growth for further PWW treatment. This study optimized the concentrations of PF reagents to minimise water and nutrient inputs while maintaining microalgae-based treatment efficiency. PF trials were conducted in pilot-scale raceway ponds under solar radiation, testing different concentrations of FeSO4 (4.48 and 8.95 mM) and H2O2 (77, 154, and 309 mM). Following PF, Tetradesmus obliquus was used in a biological treatment of PWW to recover the remaining nutrients. PF achieved high removal efficiencies for turbidity (97.6-99.5 %), total organic carbon (59.2-77.1 %), and chemical oxygen demand (83.8-94.7 %), but ammonium was not significantly removed. Phosphorus was almost completely removed through iron precipitation during neutralisation. Lowering the H2O2 concentration from 309 to 77 mM did not compromise removal efficiency but reducing FeSO4 below 8.95 mM negatively affected the process. Consequently, 8.95 mM FeSO4 and 77 mM H2O2 were selected for microalgae production. The pretreated PWW could be recycled at least once for microalgal production, without nutrient supplementation, improving biomass productivity and PWW treatment, especially targeting ammonium. Phosphorus supplementation, however, did not significantly boost biomass productivity or treatment efficiency. Moreover, the iron sludge generated from PF pretreatment contained enough NPK to be repurposed as an organic fertilizer boosting sustainable agricultural practices. These findings encourage further investigation of this emerging combined technology towards wastewater treatment at large-scale.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFerreira, A., Attar, S.B., Villaró-Cos, S., Ciardi, M., Soriano-Molina, P., López, J.L.C., Lafarga, T., Santos, C.M., Acién, G. & Gouveia, L. (2025) Piggery wastewater treatment by solar photo-Fenton coupled with microalgae production. In: Water Research, 2025, vol. 271, article nº122869. https://doi.org/10.1016/j.watres.2024.122869pt_PT
dc.identifier.doi10.1016/j.watres.2024.122869pt_PT
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/10400.9/4424
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationForest Research Centre
dc.relation.publisherversionhttps://doi.org/10.1016/j.watres.2024.122869pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicroalgaept_PT
dc.subjectTetradesmus obliquuspt_PT
dc.subjectWastewater treatmentpt_PT
dc.subjectPiggery effluentpt_PT
dc.subjectAgricultural Wastespt_PT
dc.subjectPhotosynthesispt_PT
dc.titlePiggery wastewater treatment by solar photo-Fenton coupled with microalgae productionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleForest Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00239%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F144122%2F2019/PT
oaire.citation.titleWater Researchpt_PT
oaire.citation.volume271pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamOE
person.familyNameFerreira
person.familyNameGouveia
person.givenNameAlice
person.givenNameLuisa
person.identifierH-4046-2011
person.identifier.ciencia-idD115-8FF3-9097
person.identifier.ciencia-id581B-924A-84DD
person.identifier.orcid0000-0002-2397-3943
person.identifier.orcid0000-0003-0196-6360
person.identifier.scopus-author-id7004135834
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
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd0b70ea9-bb53-452c-ab86-b4bf8aee0249
relation.isAuthorOfPublication63dcbe08-14df-4886-98b7-2945cbe0e062
relation.isAuthorOfPublication.latestForDiscovery63dcbe08-14df-4886-98b7-2945cbe0e062
relation.isProjectOfPublication7e523fcd-9356-4a83-8d2c-3ebf157b35bf
relation.isProjectOfPublication3e8ebe30-eebb-4733-9a61-4d8c130ead4f
relation.isProjectOfPublication.latestForDiscovery7e523fcd-9356-4a83-8d2c-3ebf157b35bf

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