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A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae

2021-06Journal article Open access
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dc.contributor.authorViegas, Catarina
dc.contributor.authorNobre, Catarina
dc.contributor.authorMota, André
dc.contributor.authorVilarinho, Cândida
dc.contributor.authorGouveia, Luisa
dc.contributor.authorGonçalves, Maria Margarida
dc.date.accessioned2021-11-23T17:34:09Z
dc.date.available2021-11-23T17:34:09Z
dc.date.issued2021-06
dc.description.abstractABSTRACT: The aim of this work was to study an integrated approach for landfill leachate remediation comprising chemical precipitation with biomass bottom ash as a pre-treatment to reduce color and turbidity followed by bioremediation through microalgae treatment for effluent disposal. Optimal pre-treatment conditions were determined through batch experiments and were found to be 160 g L-1 ash dose, 96 h of contact time, overhead agitation at 15 rpm and ash particle size below 500 mu m. These conditions led to removal efficiencies of 74.3% for chemical oxygen demand and 98.5% for color. Large quantities of sludge containing excess biomass ash and precipitated compounds were formed during the pre-treatment. To minimize solid disposal, this sludge was tested as a raw material for cementitious and aggregate substitute in mortar formulations. Following the pre-treatment, the leachate was inoculated with six different microalgae species to evaluate their ability to grow in such a recalcitrant effluent and remediate it. After a period of 27 days biomass concentration from 0.4 to 1.2 g L-1 were achieved for the tested microalgae. Removal efficiencies were in the range of 18-62% for COD, 63-71% for N, and 15-100% for P. At the end of the treatment, algal biomass was characterized regarding protein, lipid, fatty acids, carbohydrate, and ash contents. This approach allows a low-cost remediation of these recalcitrant effluents when compared with the present options that include inverse osmosis, and the valorization of ash-rich precipitates and microalgae biomass improves the sustainability of the overall process.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationViegas, Catarina... [et.al.] - A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae. In: Journal of Environmental Chemical Engineering, 2021, Vol. 9 (3), article nº 105187pt_PT
dc.identifier.doi10.1016/j.jece.2021.105187pt_PT
dc.identifier.eissn2213-3437
dc.identifier.urihttp://hdl.handle.net/10400.9/3615
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationALGAVALOR - Lisboa-01-0247-FEDER-035234pt_PT
dc.relationBiorremediação de efluentes agroindustriais por microalgas e valorização da biomassa algal numa economia circular
dc.relationMechanical Engineering and Resource Sustainability Center
dc.relation.publisherversionhttps://doi.org/10.1016/j.jece.2021.105187pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicroalgaept_PT
dc.subjectLandfillpt_PT
dc.subjectWastewater treatmentpt_PT
dc.subjectBioremediationpt_PT
dc.titleA circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgaept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBiorremediação de efluentes agroindustriais por microalgas e valorização da biomassa algal numa economia circular
oaire.awardTitleMechanical Engineering and Resource Sustainability Center
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F131178%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04077%2F2020/PT
oaire.citation.issue3pt_PT
oaire.citation.titleJournal of Environmental Chemical Engineeringpt_PT
oaire.citation.volume9pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameViegas
person.familyNameNobre
person.familyNameGouveia
person.familyNameGonçalves
person.givenNameCatarina
person.givenNameCatarina
person.givenNameLuisa
person.givenNameMargarida
person.identifierH-4046-2011
person.identifier.ciencia-id0610-8176-4E0A
person.identifier.ciencia-id0319-49E5-08E2
person.identifier.ciencia-id581B-924A-84DD
person.identifier.ciencia-idD21C-B32E-4971
person.identifier.orcid0000-0001-9762-9478
person.identifier.orcid0000-0001-5733-902X
person.identifier.orcid0000-0003-0196-6360
person.identifier.orcid0000-0002-0940-519X
person.identifier.scopus-author-id57002877600
person.identifier.scopus-author-id7004135834
person.identifier.scopus-author-id55421400300
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
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