Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations
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/10400.1/18189 |
Resumo: | The valorization of microalgal biomass produced during wastewater treatment has the potential to mitigate treatment costs. As contaminated biomass (e.g., with pharmaceuticals, toxic metals, etc.) is often generated, biogas production is considered an effective valorization option. The biomass was obtained from a pilot facility of photobioreactors for tertiary wastewater treatment. The pilots were run for one year with naturally formed microalgal consortia. The biogas was generated in 70 mL crimp-top vials at 35 °C, quantified with a manometer and the methane yield measured by gas chromatography. A maximum biogas production of 311 mL/g volatile solids (VS) with a methane yield of 252 mL/g VS was obtained with the spring samples. These rather low values were not improved using previous thermo-acidic hydrolysis, suggesting that the low intrinsic biodegradable organic matter content of the consortia might be the cause for low yield. Considering the total volume of wastewater treated by this plant and the average amount of methane produced in this study, the substitution of the current tertiary treatment with the one here proposed would reduce the energy consumption of the plant by 20% and create an energy surplus of 2.8%. The implementation of this system would therefore contribute towards meeting the ambitious decarbonization targets established by the EU. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variationsBomethaneThermo-acidic hydrolysisMicroalgal compositionEnergy potentialThe valorization of microalgal biomass produced during wastewater treatment has the potential to mitigate treatment costs. As contaminated biomass (e.g., with pharmaceuticals, toxic metals, etc.) is often generated, biogas production is considered an effective valorization option. The biomass was obtained from a pilot facility of photobioreactors for tertiary wastewater treatment. The pilots were run for one year with naturally formed microalgal consortia. The biogas was generated in 70 mL crimp-top vials at 35 °C, quantified with a manometer and the methane yield measured by gas chromatography. A maximum biogas production of 311 mL/g volatile solids (VS) with a methane yield of 252 mL/g VS was obtained with the spring samples. These rather low values were not improved using previous thermo-acidic hydrolysis, suggesting that the low intrinsic biodegradable organic matter content of the consortia might be the cause for low yield. Considering the total volume of wastewater treated by this plant and the average amount of methane produced in this study, the substitution of the current tertiary treatment with the one here proposed would reduce the energy consumption of the plant by 20% and create an energy surplus of 2.8%. The implementation of this system would therefore contribute towards meeting the ambitious decarbonization targets established by the EU.ALG-01-0247-FEDER-035234MDPISapientiaBarros, RaúlRaposo, SaraMorais, EtieleRodrigues, BrígidaLourenço Afonso, ValdemiraGonçalves, PedroMarques, JoséCerqueira, RicardoVarela, JoãoRibau Teixeira, MargaridaBarreira, Luísa2022-08-30T10:41:16Z2022-08-052022-08-11T11:50:01Z2022-08-05T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/18189engEnergies 15 (15): 5713 (2022)doi: 10.3390/en1515571310.3390/en151557131996-1073info: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:RCAAP2024-03-06T02:03:17Zoai:sapientia.ualg.pt:10400.1/18189Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:07:57.295669Repositório 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 |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
title |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
spellingShingle |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations Barros, Raúl Bomethane Thermo-acidic hydrolysis Microalgal composition Energy potential |
title_short |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
title_full |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
title_fullStr |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
title_full_unstemmed |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
title_sort |
Biogas production from microalgal biomass produced in the tertiary treatment of urban wastewater: assessment of seasonal variations |
author |
Barros, Raúl |
author_facet |
Barros, Raúl Raposo, Sara Morais, Etiele Rodrigues, Brígida Lourenço Afonso, Valdemira Gonçalves, Pedro Marques, José Cerqueira, Ricardo Varela, João Ribau Teixeira, Margarida Barreira, Luísa |
author_role |
author |
author2 |
Raposo, Sara Morais, Etiele Rodrigues, Brígida Lourenço Afonso, Valdemira Gonçalves, Pedro Marques, José Cerqueira, Ricardo Varela, João Ribau Teixeira, Margarida Barreira, Luísa |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Barros, Raúl Raposo, Sara Morais, Etiele Rodrigues, Brígida Lourenço Afonso, Valdemira Gonçalves, Pedro Marques, José Cerqueira, Ricardo Varela, João Ribau Teixeira, Margarida Barreira, Luísa |
dc.subject.por.fl_str_mv |
Bomethane Thermo-acidic hydrolysis Microalgal composition Energy potential |
topic |
Bomethane Thermo-acidic hydrolysis Microalgal composition Energy potential |
description |
The valorization of microalgal biomass produced during wastewater treatment has the potential to mitigate treatment costs. As contaminated biomass (e.g., with pharmaceuticals, toxic metals, etc.) is often generated, biogas production is considered an effective valorization option. The biomass was obtained from a pilot facility of photobioreactors for tertiary wastewater treatment. The pilots were run for one year with naturally formed microalgal consortia. The biogas was generated in 70 mL crimp-top vials at 35 °C, quantified with a manometer and the methane yield measured by gas chromatography. A maximum biogas production of 311 mL/g volatile solids (VS) with a methane yield of 252 mL/g VS was obtained with the spring samples. These rather low values were not improved using previous thermo-acidic hydrolysis, suggesting that the low intrinsic biodegradable organic matter content of the consortia might be the cause for low yield. Considering the total volume of wastewater treated by this plant and the average amount of methane produced in this study, the substitution of the current tertiary treatment with the one here proposed would reduce the energy consumption of the plant by 20% and create an energy surplus of 2.8%. The implementation of this system would therefore contribute towards meeting the ambitious decarbonization targets established by the EU. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-30T10:41:16Z 2022-08-05 2022-08-11T11:50:01Z 2022-08-05T00:00:00Z |
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/10400.1/18189 |
url |
http://hdl.handle.net/10400.1/18189 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Energies 15 (15): 5713 (2022) doi: 10.3390/en15155713 10.3390/en15155713 1996-1073 |
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 |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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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1799133325516865536 |