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

Detalhes bibliográficos
Autor(a) principal: Viegas, Catarina
Data de Publicação: 2021
Outros Autores: Nobre, Catarina, Mota, André, Vilarinho, Cândida, Gouveia, Luisa, Gonçalves, Maria Margarida
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/3615
Resumo: ABSTRACT: 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.
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spelling A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgaeMicroalgaeLandfillWastewater treatmentBioremediationABSTRACT: 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.ElsevierRepositório do LNEGViegas, CatarinaNobre, CatarinaMota, AndréVilarinho, CândidaGouveia, LuisaGonçalves, Maria Margarida2021-11-23T17:34:09Z2021-06-01T00:00:00Z2021-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3615engViegas, 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 10518710.1016/j.jece.2021.1051872213-3437info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T12:29:18Zoai:repositorio.lneg.pt:10400.9/3615Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:36:49.419293Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
title A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
spellingShingle A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
Viegas, Catarina
Microalgae
Landfill
Wastewater treatment
Bioremediation
title_short A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
title_full A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
title_fullStr A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
title_full_unstemmed A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
title_sort A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
author Viegas, Catarina
author_facet Viegas, Catarina
Nobre, Catarina
Mota, André
Vilarinho, Cândida
Gouveia, Luisa
Gonçalves, Maria Margarida
author_role author
author2 Nobre, Catarina
Mota, André
Vilarinho, Cândida
Gouveia, Luisa
Gonçalves, Maria Margarida
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Viegas, Catarina
Nobre, Catarina
Mota, André
Vilarinho, Cândida
Gouveia, Luisa
Gonçalves, Maria Margarida
dc.subject.por.fl_str_mv Microalgae
Landfill
Wastewater treatment
Bioremediation
topic Microalgae
Landfill
Wastewater treatment
Bioremediation
description ABSTRACT: 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.
publishDate 2021
dc.date.none.fl_str_mv 2021-11-23T17:34:09Z
2021-06-01T00:00:00Z
2021-06-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/3615
url http://hdl.handle.net/10400.9/3615
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Viegas, 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 105187
10.1016/j.jece.2021.105187
2213-3437
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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