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A pilot study combining ultrafiltration with ozonation for the treatment of secondary urban wastewater: organic micropollutants, microbial load and biological effects

2020-12Journal article Open access
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dc.contributor.authorGraça, Cátia A. L.
dc.contributor.authorRibeirinho-Soares, Sara
dc.contributor.authorAbreu-Silva, Joana
dc.contributor.authorRamos, Inês I.
dc.contributor.authorRibeiro, Ana R.
dc.contributor.authorCastro-Silva, Sérgio M.
dc.contributor.authorSegundo, Marcela A.
dc.contributor.authorManaia, Célia M.
dc.contributor.authorNunes, Olga C.
dc.contributor.authorSilva, Adrián M. T.
dc.date.accessioned2021-05-13T09:23:20Z
dc.date.available2021-05-13T09:23:20Z
dc.date.issued2020-12
dc.description.abstractOzonation followed by ultrafiltration (O3 + UF) was employed at pilot scale for the treatment of secondary urban wastewater, envisaging its safe reuse for crop irrigation. Chemical contaminants of emerging concern (CECs) and priority substances (PSs), microbial load, estrogenic activity, cell viability and cellular metabolic activity were measured before and immediately after O3 + UF treatment. The microbial load was also evaluated after one-week storage of the treated water to assess potential bacteria regrowth. Among the organic micropollutants detected, only citalopram and isoproturon were not removed below the limit of quantification. The treatment was also effective in the reduction in the bacterial loads considering current legislation in water quality for irrigation (i.e., in terms of enterobacteria and nematode eggs). However, after seven days of storage, total heterotrophs regrew to levels close to the initial, with the concomitant increase in the genes 16S rRNA and intI1. The assessment of biological effects revealed similar water quality before and after treatment, meaning that O3 + UF did not produce detectable toxic by-products. Thus, the findings of this study indicate that the wastewater treated with this technology comply with the water quality standards for irrigation, even when stored up to one week, although improvements must be made to minimise microbial overgrowth.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/w12123458pt_PT
dc.identifier.eid85100020622
dc.identifier.issn2073-4441
dc.identifier.urihttp://hdl.handle.net/10400.14/33069
dc.identifier.wos000602966800001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAdvanced oxidationpt_PT
dc.subjectBiological contaminantspt_PT
dc.subjectCytotoxicitypt_PT
dc.subjectMembrane technologypt_PT
dc.subjectMicropollutantspt_PT
dc.subjectWastewater reusept_PT
dc.titleA pilot study combining ultrafiltration with ozonation for the treatment of secondary urban wastewater: organic micropollutants, microbial load and biological effectspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage16pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleWaterpt_PT
oaire.citation.volume12pt_PT
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person.givenNameCátia
person.givenNameInês
person.givenNameAna Rita Lado
person.givenNameSergio
person.givenNameMarcela
person.givenNameCélia
person.givenNameOlga
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rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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