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Vertical flow constructed wetland as a green solution for low biodegradable and high nitrogen wastewater: A case study of explosives industry

dc.contributor.authorMadeira, Luís Miguel
dc.contributor.authorCarvalho, Fatima
dc.contributor.authorTeixeira, Margarida Ribau
dc.contributor.authorRibeiro, Carlos
dc.contributor.authorAlmeida, Adelaide
dc.date.accessioned2021-09-08T10:57:52Z
dc.date.available2021-09-08T10:57:52Z
dc.date.issued2021-06
dc.description.abstractThe removal of nitrogen compounds from a pretreated explosives wastewater in vertical flow constructed wetland planted with Vetiveria zizanioides (0.24 m(2) x 0.70 m), filled with light expanded clay aggregates (Leca (R) NR 10/20), was studied. Experiments under constant hydraulic load, 50 +/- 4 Lm(-2) d(-1) and 83 +/- 5 L m(-2) d(-1) without and with flooding level (25%), respectively, were made at different ammonium (3-48 mg NH4+-N L-1), nitrate (56-160 mg NO3--N L-1) and nitrite (0.3-1.1 mg NO2--N L-1) concentrations. Results indicate that without flooding level (unsaturated) the removal efficiencies obtained were 30 +/- 9, 7 +/- 1 and 96 +/- 2%, respectively to NH4+-N, NO3--N and NO2--N. When using flooding level and an external carbon source (C/N ratio from 1.3 +/- 0.19 to 2.5 +/- 0.20), the organic matter (COD) removal efficiencies were above 90%, 75% for NH4+-N and 55% to NO3--N. Increasing the C/N ratio from 2.9 +/- 0.21 to 4 +/- 0.22 did not contributed to upgrade the efficiencies of COD, NH4+-N and NO3--N removal. The denitrification process was occurred in aerobic conditions and nitrite production have ben occurred, probably due to the presence of aerobic conditions that inhibited partially denitrification. (C) 2021 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.chemosphere.2021.129871
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/10400.1/16959
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.subjectExplosives wastewater
dc.subjectVertical flow constructed wetland
dc.subjectFlooding level
dc.subjectNitrogen and organic loads
dc.subjectVetiveria zizanioides
dc.subject.otherEnvironmental Sciences & Ecology
dc.titleVertical flow constructed wetland as a green solution for low biodegradable and high nitrogen wastewater: A case study of explosives industry
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/71415/PT
oaire.citation.startPage129871
oaire.citation.titleChemosphere
oaire.citation.volume272
oaire.fundingStreamOE
person.familyNameMadeira
person.familyNameRibau Teixeira
person.givenNameLuís Miguel Simão
person.givenNameMargarida
person.identifier.ciencia-idA214-0A87-64EC
person.identifier.ciencia-id9111-87FB-26AA
person.identifier.orcid0000-0001-7674-8881
person.identifier.orcid0000-0002-2153-3282
person.identifier.ridB-9012-2012
person.identifier.scopus-author-id55760206500
person.identifier.scopus-author-id8988625600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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