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

2025-03Journal article Restricted access
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dc.contributor.authorFerreira, Alice
dc.contributor.authorBelachqer-El Attar, Solaima
dc.contributor.authorVillaró-Cos, Silvia
dc.contributor.authorCiardi, Martina
dc.contributor.authorSoriano-Molina, Paula
dc.contributor.authorLópez, José Luis Casas
dc.contributor.authorLafarga, Tomás
dc.contributor.authorMarques-dos-Santos, Cláudia
dc.contributor.authorAcién, Gabriel
dc.contributor.authorGouveia, Luisa
dc.date.accessioned2025-01-10T12:08:30Z
dc.date.available2025-01-10T12:08:30Z
dc.date.issued2025-03
dc.description.abstractPig 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.eng
dc.description.sponsorshipLA/P/0092/2020; CPRE2023-007; CPRE2023-076; SFRH/BD/144.122/2019
dc.identifier.doi10.1016/j.watres.2024.122869
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/10400.1/26606
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationCombination of Constructed Vertical flow Wetlands, Microalgae Photobioreactor and Microbial Fuel Cell (KIT) for wastewater treatment in small pig production farms
dc.relationForest Research Centre
dc.relationDevelopment of agricultural bioproducts biofertilizers, biostimulants and biopesticides from piggery wastewater treatment-based microalgae
dc.relation.ispartofWater Research
dc.rights.uriN/A
dc.subjectAgricultural waste
dc.subjectPig slurry
dc.subjectPhotosynthesis
dc.subjectRaceway
dc.subjectTetradesmus obliquus
dc.titlePiggery wastewater treatment by solar photo-Fenton coupled with microalgae productioneng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCombination of Constructed Vertical flow Wetlands, Microalgae Photobioreactor and Microbial Fuel Cell (KIT) for wastewater treatment in small pig production farms
oaire.awardTitleForest Research Centre
oaire.awardTitleDevelopment of agricultural bioproducts biofertilizers, biostimulants and biopesticides from piggery wastewater treatment-based microalgae
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/DRI%2FIndia%2F0609%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00239%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F144122%2F2019/PT
oaire.citation.startPage122869
oaire.citation.titleWater Research
oaire.citation.volume271
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameGouveia
person.givenNameLuisa
person.identifierH-4046-2011
person.identifier.ciencia-id581B-924A-84DD
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.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
relation.isAuthorOfPublicationf559d57b-b659-4d65-bf6c-698bf99e729b
relation.isAuthorOfPublication.latestForDiscoveryf559d57b-b659-4d65-bf6c-698bf99e729b
relation.isProjectOfPublication5b9ae94b-c9c5-4af0-8f47-a25deb141081
relation.isProjectOfPublicationb00d764b-2e73-46d8-bc7d-c692775d75f5
relation.isProjectOfPublicationf20303e7-db30-48d5-a3be-2a502d408046
relation.isProjectOfPublication.latestForDiscovery5b9ae94b-c9c5-4af0-8f47-a25deb141081

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