Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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/10400.9/3763 |
Resumo: | ABSTRACT: Electrocoagulation is a promising technology to harvest microalgal biomass. However, the commonly used aluminum electrodes release undesired salts that decrease biomass value. In this study, alternative iron, zinc, and magnesium electrodes and operational parameters pH, time and current density were studied to harvest Nannochloropsis oceanica. For recovery efficiency and concentration factor the initial pH was most important using iron electrodes, while time and current density were more relevant using zinc and magnesium electrodes. Optimal parameters resulted in biomass recovery efficiencies > 95%, biomass was concentrated 2.8-7.2 times and contained 15.7-29.1% ashes. Elemental analysis revealed metal salts in harvested biomass resulting from electrode corrosion. Finally, ash contents could be reduced by 65% using EDTA as a chelating agent. The electrocoagulation harvested microalgal biomass enriched in essential metals may be a promising bioresource for agricultural growth inducers, or functional ingredients for feed. |
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Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applicationsMicroalgaeElectrocoagulationHarvestingBiomass valorisationMetal recoveryABSTRACT: Electrocoagulation is a promising technology to harvest microalgal biomass. However, the commonly used aluminum electrodes release undesired salts that decrease biomass value. In this study, alternative iron, zinc, and magnesium electrodes and operational parameters pH, time and current density were studied to harvest Nannochloropsis oceanica. For recovery efficiency and concentration factor the initial pH was most important using iron electrodes, while time and current density were more relevant using zinc and magnesium electrodes. Optimal parameters resulted in biomass recovery efficiencies > 95%, biomass was concentrated 2.8-7.2 times and contained 15.7-29.1% ashes. Elemental analysis revealed metal salts in harvested biomass resulting from electrode corrosion. Finally, ash contents could be reduced by 65% using EDTA as a chelating agent. The electrocoagulation harvested microalgal biomass enriched in essential metals may be a promising bioresource for agricultural growth inducers, or functional ingredients for feed.ElsevierRepositório do LNEGFigueiredo, DanielFerreira, AliceQuelhas, P.Schulze, PeterGouveia, Luisa2022-02-23T11:38:51Z2022-01-01T00:00:00Z2022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3763engFigueiredo, Daniel... [et.al.] - Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications. In: Bioresource Technology, 2022, Vol. 344, part B, article nº 1262220960-852410.1016/j.biortech.2021.1262221873-2976info: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:RCAAP2022-09-06T12:29:32Zoai:repositorio.lneg.pt:10400.9/3763Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:37:01.517795Repositório 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 |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
title |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
spellingShingle |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications Figueiredo, Daniel Microalgae Electrocoagulation Harvesting Biomass valorisation Metal recovery |
title_short |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
title_full |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
title_fullStr |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
title_full_unstemmed |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
title_sort |
Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications |
author |
Figueiredo, Daniel |
author_facet |
Figueiredo, Daniel Ferreira, Alice Quelhas, P. Schulze, Peter Gouveia, Luisa |
author_role |
author |
author2 |
Ferreira, Alice Quelhas, P. Schulze, Peter Gouveia, Luisa |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Figueiredo, Daniel Ferreira, Alice Quelhas, P. Schulze, Peter Gouveia, Luisa |
dc.subject.por.fl_str_mv |
Microalgae Electrocoagulation Harvesting Biomass valorisation Metal recovery |
topic |
Microalgae Electrocoagulation Harvesting Biomass valorisation Metal recovery |
description |
ABSTRACT: Electrocoagulation is a promising technology to harvest microalgal biomass. However, the commonly used aluminum electrodes release undesired salts that decrease biomass value. In this study, alternative iron, zinc, and magnesium electrodes and operational parameters pH, time and current density were studied to harvest Nannochloropsis oceanica. For recovery efficiency and concentration factor the initial pH was most important using iron electrodes, while time and current density were more relevant using zinc and magnesium electrodes. Optimal parameters resulted in biomass recovery efficiencies > 95%, biomass was concentrated 2.8-7.2 times and contained 15.7-29.1% ashes. Elemental analysis revealed metal salts in harvested biomass resulting from electrode corrosion. Finally, ash contents could be reduced by 65% using EDTA as a chelating agent. The electrocoagulation harvested microalgal biomass enriched in essential metals may be a promising bioresource for agricultural growth inducers, or functional ingredients for feed. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-02-23T11:38:51Z 2022-01-01T00:00:00Z 2022-01-01T00:00:00Z |
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/10400.9/3763 |
url |
http://hdl.handle.net/10400.9/3763 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Figueiredo, Daniel... [et.al.] - Nannochloropsis oceanica harvested using electrocoagulation with alternative electrodes: an innovative approach on potential biomass applications. In: Bioresource Technology, 2022, Vol. 344, part B, article nº 126222 0960-8524 10.1016/j.biortech.2021.126222 1873-2976 |
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 |
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RCAAP |
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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) |
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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1799130236767436800 |