Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.scitotenv.2021.150776 http://hdl.handle.net/11449/233642 |
Resumo: | Tannin-based coagulants (TBCs) have the potential to be used to harvest microalgae cultivated at wastewater treatment plants. Their use would address the circular economy associated with the production of low-toxicity biomass and supernatant. Studies in this field are still scarce, and substantial gaps exist in the definitions of the flocculation process parameters. In this context, the objective of this work was to evaluate TBC performance as a natural coagulant for harvesting microalgae biomass grown in sanitary effluent digested in an up flow biofilter, as well establishing a path to enable recovery and reuse of wastewater nutrients. Classical removal techniques combined with image analysis and light scattering-based equipment were used to evaluate the coagulant performance, recovery efficiency, floc strength, and floc recovery compared to aluminum sulfate (AS). The results showed that TBC was able to efficiently harvest algal biomass from the effluent, achieving color, turbidity, and optical density (OD) removal efficiencies greater than 90% with only 5 min of sedimentation. The optimal harvesting dosage was 100 mg·L−1 for TBC and 75 mg·L−1 for AS. TBC presented the advantage of harvesting biomass without changing the pH of the medium and was also able to present satisfactory removal of the analyzed parameters (color, turbidity and OD) at pH values of 5.0, 7.0, and 8.5. In addition, TBC produced stronger flocs than AS, showing a better ability to resist breakage upon sudden shear rate variations. TBC produced macronutrient-rich biomass and supernatant that was similar to that produced with AS. |
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Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterizationHarvestingMicroalgaeNatural coagulantTannin-based coagulantWastewater treatmentTannin-based coagulants (TBCs) have the potential to be used to harvest microalgae cultivated at wastewater treatment plants. Their use would address the circular economy associated with the production of low-toxicity biomass and supernatant. Studies in this field are still scarce, and substantial gaps exist in the definitions of the flocculation process parameters. In this context, the objective of this work was to evaluate TBC performance as a natural coagulant for harvesting microalgae biomass grown in sanitary effluent digested in an up flow biofilter, as well establishing a path to enable recovery and reuse of wastewater nutrients. Classical removal techniques combined with image analysis and light scattering-based equipment were used to evaluate the coagulant performance, recovery efficiency, floc strength, and floc recovery compared to aluminum sulfate (AS). The results showed that TBC was able to efficiently harvest algal biomass from the effluent, achieving color, turbidity, and optical density (OD) removal efficiencies greater than 90% with only 5 min of sedimentation. The optimal harvesting dosage was 100 mg·L−1 for TBC and 75 mg·L−1 for AS. TBC presented the advantage of harvesting biomass without changing the pH of the medium and was also able to present satisfactory removal of the analyzed parameters (color, turbidity and OD) at pH values of 5.0, 7.0, and 8.5. In addition, TBC produced stronger flocs than AS, showing a better ability to resist breakage upon sudden shear rate variations. TBC produced macronutrient-rich biomass and supernatant that was similar to that produced with AS.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidade Estadual de São Paulo Júlio de Mesquita Filho (UNESP), Campus de Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01, Vargem LimpaAssociação Oceano Verde (GreenCoLab) Universidade do Algarve, Campus de Gambelas, Pavilhão B1, Gabinete H8Universidade Estadual de São Paulo Júlio de Mesquita Filho (UNESP), Campus de Rio Claro, Avenida 24 A,1515, Bela VistaUniversidade Estadual de São Paulo Júlio de Mesquita Filho (UNESP), Campus de Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01, Vargem LimpaUniversidade Estadual de São Paulo Júlio de Mesquita Filho (UNESP), Campus de Rio Claro, Avenida 24 A,1515, Bela VistaFAPESP: 2018/18367-1CNPq: 301210/2018-7CNPq: 309064/2018-0CNPq: 427936/2018-7CAPES: 88887.310463/2018-00CAPES: 88887.468868/2019-00Universidade Estadual Paulista (UNESP)Teixeira, Mariana Souza [UNESP]Speranza, Lais Galileu [UNESP]da Silva, Isabel Costacurta [UNESP]Moruzzi, Rodrigo Braga [UNESP]Silva, Gustavo Henrique Ribeiro [UNESP]2022-05-01T09:31:05Z2022-05-01T09:31:05Z2022-02-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.scitotenv.2021.150776Science of the Total Environment, v. 807.1879-10260048-9697http://hdl.handle.net/11449/23364210.1016/j.scitotenv.2021.1507762-s2.0-85116770794Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScience of the Total Environmentinfo:eu-repo/semantics/openAccess2022-05-01T09:31:05Zoai:repositorio.unesp.br:11449/233642Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:01:57.546098Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
title |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
spellingShingle |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization Teixeira, Mariana Souza [UNESP] Harvesting Microalgae Natural coagulant Tannin-based coagulant Wastewater treatment |
title_short |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
title_full |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
title_fullStr |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
title_full_unstemmed |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
title_sort |
Tannin-based coagulant for harvesting microalgae cultivated in wastewater: Efficiency, floc morphology and products characterization |
author |
Teixeira, Mariana Souza [UNESP] |
author_facet |
Teixeira, Mariana Souza [UNESP] Speranza, Lais Galileu [UNESP] da Silva, Isabel Costacurta [UNESP] Moruzzi, Rodrigo Braga [UNESP] Silva, Gustavo Henrique Ribeiro [UNESP] |
author_role |
author |
author2 |
Speranza, Lais Galileu [UNESP] da Silva, Isabel Costacurta [UNESP] Moruzzi, Rodrigo Braga [UNESP] Silva, Gustavo Henrique Ribeiro [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Teixeira, Mariana Souza [UNESP] Speranza, Lais Galileu [UNESP] da Silva, Isabel Costacurta [UNESP] Moruzzi, Rodrigo Braga [UNESP] Silva, Gustavo Henrique Ribeiro [UNESP] |
dc.subject.por.fl_str_mv |
Harvesting Microalgae Natural coagulant Tannin-based coagulant Wastewater treatment |
topic |
Harvesting Microalgae Natural coagulant Tannin-based coagulant Wastewater treatment |
description |
Tannin-based coagulants (TBCs) have the potential to be used to harvest microalgae cultivated at wastewater treatment plants. Their use would address the circular economy associated with the production of low-toxicity biomass and supernatant. Studies in this field are still scarce, and substantial gaps exist in the definitions of the flocculation process parameters. In this context, the objective of this work was to evaluate TBC performance as a natural coagulant for harvesting microalgae biomass grown in sanitary effluent digested in an up flow biofilter, as well establishing a path to enable recovery and reuse of wastewater nutrients. Classical removal techniques combined with image analysis and light scattering-based equipment were used to evaluate the coagulant performance, recovery efficiency, floc strength, and floc recovery compared to aluminum sulfate (AS). The results showed that TBC was able to efficiently harvest algal biomass from the effluent, achieving color, turbidity, and optical density (OD) removal efficiencies greater than 90% with only 5 min of sedimentation. The optimal harvesting dosage was 100 mg·L−1 for TBC and 75 mg·L−1 for AS. TBC presented the advantage of harvesting biomass without changing the pH of the medium and was also able to present satisfactory removal of the analyzed parameters (color, turbidity and OD) at pH values of 5.0, 7.0, and 8.5. In addition, TBC produced stronger flocs than AS, showing a better ability to resist breakage upon sudden shear rate variations. TBC produced macronutrient-rich biomass and supernatant that was similar to that produced with AS. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-01T09:31:05Z 2022-05-01T09:31:05Z 2022-02-10 |
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://dx.doi.org/10.1016/j.scitotenv.2021.150776 Science of the Total Environment, v. 807. 1879-1026 0048-9697 http://hdl.handle.net/11449/233642 10.1016/j.scitotenv.2021.150776 2-s2.0-85116770794 |
url |
http://dx.doi.org/10.1016/j.scitotenv.2021.150776 http://hdl.handle.net/11449/233642 |
identifier_str_mv |
Science of the Total Environment, v. 807. 1879-1026 0048-9697 10.1016/j.scitotenv.2021.150776 2-s2.0-85116770794 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Science of the Total Environment |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808128596024229888 |