Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production

Research on new sources of bioenergy is nowadays driving attention to microalgae. Cost-effective biomass harvesting and thickening pose a challenge for massive microalgae production for biofuels. In this study, coagulation-flocculation and sedimentation with natural flocculants (Ecotan and Tanfloc)...

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Autores: Gutiérrez Martínez, Raquel, Passos, Fabiana Lopes del Rei|||0000-0001-7501-988X, Ferrer Martí, Ivet|||0000-0002-4568-4843, Uggetti, Enrica|||0000-0001-6919-485X, García Serrano, Joan|||0000-0003-1258-8174
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/84997
Acceso en línea:https://hdl.handle.net/2117/84997
https://dx.doi.org/10.1016/j.algal.2015.03.010
Access Level:acceso abierto
Palabra clave:Biomass energy
Constructed wetlands
Algae
Coagulation
Flocculation
Photobioreactor
Raceway pond
Wastewater
Biogàs
Algues -- Biotecnologia
Biomassa
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
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spelling Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas productionGutiérrez Martínez, RaquelPassos, Fabiana Lopes del Rei|||0000-0001-7501-988XFerrer Martí, Ivet|||0000-0002-4568-4843Uggetti, Enrica|||0000-0001-6919-485XGarcía Serrano, Joan|||0000-0003-1258-8174Biomass energyConstructed wetlandsAlgaeCoagulationFlocculationPhotobioreactorRaceway pondWastewaterBiogàsAlgues -- BiotecnologiaBiomassaÀrees temàtiques de la UPC::Energies::Recursos energètics renovables::BiogàsResearch on new sources of bioenergy is nowadays driving attention to microalgae. Cost-effective biomass harvesting and thickening pose a challenge for massive microalgae production for biofuels. In this study, coagulation-flocculation and sedimentation with natural flocculants (Ecotan and Tanfloc) was evaluated on microalgae grown in an experimental high rate algal pond treating urban wastewater. Jar tests showed how flocculant doses of 10 and 50mg/L of Ecotan and Tanfloc enabled over 90% biomass recovery. Furthermore, settling column tests showed that both flocculants increased microalgae settling velocity, performing fast and efficient biomass recovery (>90% recovery in 10-20min). Thus, the use of either flocculant would enhance microalgal biomass reducing the HRT and settler volume. Finally, the potential toxicity of flocculants upon biomass production was assessed in biochemical methane potential tests. Results indicated that doses of 10-50mg/L of Ecotan and Tanfloc did not affect anaerobic digestion, leading to the same methane yield (162-166mL CH4/g VS) with the same methane content (70%) as the control without flocculants. This study demonstrates that Ecotan and Tanfloc flocculants would be appropriate for microalgae biomass harvesting and subsequent biogas generation.20152015-05-0120162016-03-31journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/84997https://dx.doi.org/10.1016/j.algal.2015.03.010reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/849972026-05-27T15:37:01Z
dc.title.none.fl_str_mv Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
title Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
spellingShingle Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
Gutiérrez Martínez, Raquel
Biomass energy
Constructed wetlands
Algae
Coagulation
Flocculation
Photobioreactor
Raceway pond
Wastewater
Biogàs
Algues -- Biotecnologia
Biomassa
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
title_short Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
title_full Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
title_fullStr Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
title_full_unstemmed Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
title_sort Harvesting microalgae from wastewater treatment systems with natural flocculants: Effect on biomass settling and biogas production
dc.creator.none.fl_str_mv Gutiérrez Martínez, Raquel
Passos, Fabiana Lopes del Rei|||0000-0001-7501-988X
Ferrer Martí, Ivet|||0000-0002-4568-4843
Uggetti, Enrica|||0000-0001-6919-485X
García Serrano, Joan|||0000-0003-1258-8174
author Gutiérrez Martínez, Raquel
author_facet Gutiérrez Martínez, Raquel
Passos, Fabiana Lopes del Rei|||0000-0001-7501-988X
Ferrer Martí, Ivet|||0000-0002-4568-4843
Uggetti, Enrica|||0000-0001-6919-485X
García Serrano, Joan|||0000-0003-1258-8174
author_role author
author2 Passos, Fabiana Lopes del Rei|||0000-0001-7501-988X
Ferrer Martí, Ivet|||0000-0002-4568-4843
Uggetti, Enrica|||0000-0001-6919-485X
García Serrano, Joan|||0000-0003-1258-8174
author2_role author
author
author
author
dc.subject.none.fl_str_mv Biomass energy
Constructed wetlands
Algae
Coagulation
Flocculation
Photobioreactor
Raceway pond
Wastewater
Biogàs
Algues -- Biotecnologia
Biomassa
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
topic Biomass energy
Constructed wetlands
Algae
Coagulation
Flocculation
Photobioreactor
Raceway pond
Wastewater
Biogàs
Algues -- Biotecnologia
Biomassa
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
description Research on new sources of bioenergy is nowadays driving attention to microalgae. Cost-effective biomass harvesting and thickening pose a challenge for massive microalgae production for biofuels. In this study, coagulation-flocculation and sedimentation with natural flocculants (Ecotan and Tanfloc) was evaluated on microalgae grown in an experimental high rate algal pond treating urban wastewater. Jar tests showed how flocculant doses of 10 and 50mg/L of Ecotan and Tanfloc enabled over 90% biomass recovery. Furthermore, settling column tests showed that both flocculants increased microalgae settling velocity, performing fast and efficient biomass recovery (>90% recovery in 10-20min). Thus, the use of either flocculant would enhance microalgal biomass reducing the HRT and settler volume. Finally, the potential toxicity of flocculants upon biomass production was assessed in biochemical methane potential tests. Results indicated that doses of 10-50mg/L of Ecotan and Tanfloc did not affect anaerobic digestion, leading to the same methane yield (162-166mL CH4/g VS) with the same methane content (70%) as the control without flocculants. This study demonstrates that Ecotan and Tanfloc flocculants would be appropriate for microalgae biomass harvesting and subsequent biogas generation.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-05-01
2016
2016-03-31
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/84997
https://dx.doi.org/10.1016/j.algal.2015.03.010
url https://hdl.handle.net/2117/84997
https://dx.doi.org/10.1016/j.algal.2015.03.010
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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