A circular approach for landfill leachate treatment: chemical precipitation with biomass ash followed by bioremediation through microalgae
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799130234917748736 |