Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/105505
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DC Field | Value | Language |
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dc.creator | Vítor J. P. Vilar | |
dc.creator | Tânia F. C. V. Silva | |
dc.creator | Petrick A. Soares | |
dc.creator | Diego R. Manenti | |
dc.creator | Amélia Fonseca | |
dc.creator | Isabel Saraiva | |
dc.creator | Rui A. R. Boaventura | |
dc.date.accessioned | 2019-07-22T23:13:40Z | - |
dc.date.available | 2019-07-22T23:13:40Z | - |
dc.date.issued | 2017 | |
dc.identifier.issn | 0048-9697 | |
dc.identifier.other | sigarra:154585 | |
dc.identifier.uri | https://hdl.handle.net/10216/105505 | - |
dc.description.abstract | In this work, an innovative methodology for the treatment of landfill leachates, after aerobic lagooning, is proposed and adjusted at pilot-scale. This methodology involves an aerobic activated sludge biological pre-oxidation (ASBO), a coagulation/sedimentation step (240 mg Fe3+/L, at pH 4.2) and a photo-oxidation through a photo-Fenton (PF) reaction (60 mg Fe2+, at pH 2.8) combining solar and artificial light. The ASBO process applied to a leachate after aerobic lagooning, with high organic and nitrogen content (1.1-1.5 g C/L; 0.8-3.0 g N/L) and low biodegradability (BOD5/COD = 0.07-0.13), is capable to oxidise 62-99% of the ammonium nitrogen, consuming only the affluent alkalinity (70-100%). The coagulation/sedimentation stage led to the humic acids precipitation, promoting a marked change in leachate colour,from dark-brown to yellowish-brown (related to fulvic acids), accompanied by a reduction of 60%, 58% and 88% on DOC, COD and TSS, respectively. The PF system promoted the degradation of the recalcitrant organic molecules into more easily biodegradable ones. According to Zahn-Wellens biodegradability test, a leachate with 419 mg DOC/L after coagulation, would have to be photo-oxidized until DOC <256 mg/L, consuming 117 mM of H2O2 and 10.4 kJ/L of accumulated UV energy, to achieve an effluent that can be biologically treated in compliance with the COD discharge limit (150 mg O-2/L) into water bodies. The biological process downstream from the photocatalytic system would promote a mineralization >60%. The PF step cost to treat 100 m(3)/day of leachate was 6.41sic/m(3), combining 1339 m(2) of CPCs with lamps. | |
dc.language.iso | eng | |
dc.relation | info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM | |
dc.relation | info:eu-repo/grantAgreement/Agência de Inovação, S.A./Projectos de I&DT em Co-Promoção/ SI IDT - 33960/2012 F2/Tecnologia de tratamento de lixiviados de aterros sanitários através da integração de processos de oxidação biológica e foto oxidação química, combinando radiação solar natural e artificial/AdvancedLFT | |
dc.rights | restrictedAccess | |
dc.subject | Tecnologia ambiental, Engenharia do ambiente | |
dc.subject | Environmental technology, Environmental engineering | |
dc.title | An innovative multistage treatment system for sanitary landfill leachate depuration: Studies at pilot-scale | |
dc.type | Artigo em Revista Científica Internacional | |
dc.contributor.uporto | Faculdade de Engenharia | |
dc.identifier.doi | 10.1016/j.scitotenv.2016.10.058 | |
dc.identifier.authenticus | P-00M-69H | |
dc.subject.fos | Ciências da engenharia e tecnologias::Engenharia do ambiente | |
dc.subject.fos | Engineering and technology::Environmental engineering | |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
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154585.pdf Restricted Access | 3.72 MB | Adobe PDF | Request a copy from the Author(s) |
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