Applicability of microaerobic technology to enhance BTEX removal from contaminated waters
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
Texto Completo: | http://www.repositorio.ufc.br/handle/riufc/71418 |
Resumo: | As the addition of low concentrations of oxygen can favor the initial degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds, this work verified the applicability of the microaerobic technology to enhance BTEX removal in an anaerobic bioreactor supplemented with high and low co-substrate (ethanol) concentrations. Additionally, structural alterations on the bioreactor microbiota were assessed throughout the experiment. The bioreactor was fed with a synthetic BTEX-contaminated water (~ 3 mg L−1 of each compound) and operated at a hydraulic retention time of 48 h. The addition of low concentrations of oxygen (1.0 mL min−1 of atmospheric air at 27 °C and 1 atm) assured high removal efficiencies (> 80%) for all compounds under microaerobic conditions. In fact, the applicability of this technology showed to be viable to enhance BTEX removal from contaminated waters, especially concerning benzene (with a 30% removal increase), which is a very recalcitrant compound under anaerobic conditions. However, high concentrations of ethanol adversely affected BTEX removal, especially benzene, under anaerobic and microaerobic conditions. Finally, although bacterial community richness decreased at low concentrations of ethanol, in general, the bioreactor microbiota could deal with the different operational conditions and preserved its functionality during the whole experiment. |
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Applicability of microaerobic technology to enhance BTEX removal from contaminated watersMonoaromaticsContaminated waterAnaerobic treatmentMicroaerobic treatmentMicroaerationAs the addition of low concentrations of oxygen can favor the initial degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds, this work verified the applicability of the microaerobic technology to enhance BTEX removal in an anaerobic bioreactor supplemented with high and low co-substrate (ethanol) concentrations. Additionally, structural alterations on the bioreactor microbiota were assessed throughout the experiment. The bioreactor was fed with a synthetic BTEX-contaminated water (~ 3 mg L−1 of each compound) and operated at a hydraulic retention time of 48 h. The addition of low concentrations of oxygen (1.0 mL min−1 of atmospheric air at 27 °C and 1 atm) assured high removal efficiencies (> 80%) for all compounds under microaerobic conditions. In fact, the applicability of this technology showed to be viable to enhance BTEX removal from contaminated waters, especially concerning benzene (with a 30% removal increase), which is a very recalcitrant compound under anaerobic conditions. However, high concentrations of ethanol adversely affected BTEX removal, especially benzene, under anaerobic and microaerobic conditions. Finally, although bacterial community richness decreased at low concentrations of ethanol, in general, the bioreactor microbiota could deal with the different operational conditions and preserved its functionality during the whole experiment.Applied Biochemistry and Biotechnology2023-03-24T14:22:37Z2023-03-24T14:22:37Z2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfFIRMINO, Paulo Igor Milen; FARIAS, Raquel Studart de; BARROS, Amanda Nascimento de; LANDIM, Patrícia Gadelha de Castro; HOLANDA, Gervina Brady Moreira; RODRÍGUEZ, Elisa Rodríguez; LOPES, Alexandre Colzi; SANTOS, André Bezerra dos. Applicability of microaerobic technology to enhance BTEX removal from contaminated waters. Applied Biochemistry and Biotechnology, [S. l.], v. 184, p. 1187-1199, 2018.1559-0291http://www.repositorio.ufc.br/handle/riufc/71418Firmino, Paulo Igor MilenFarias, Raquel Studart deBarros, Amanda Nascimento deLandim, Patrícia Gadelha de CastroHolanda, Gervina Brady MoreiraRodríguez, Elisa RodríguezLopes, Alexandre ColziSantos, André Bezerra dosinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFC2023-12-07T17:00:54Zoai:repositorio.ufc.br:riufc/71418Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2023-12-07T17:00:54Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false |
dc.title.none.fl_str_mv |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
title |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
spellingShingle |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters Firmino, Paulo Igor Milen Monoaromatics Contaminated water Anaerobic treatment Microaerobic treatment Microaeration |
title_short |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
title_full |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
title_fullStr |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
title_full_unstemmed |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
title_sort |
Applicability of microaerobic technology to enhance BTEX removal from contaminated waters |
author |
Firmino, Paulo Igor Milen |
author_facet |
Firmino, Paulo Igor Milen Farias, Raquel Studart de Barros, Amanda Nascimento de Landim, Patrícia Gadelha de Castro Holanda, Gervina Brady Moreira Rodríguez, Elisa Rodríguez Lopes, Alexandre Colzi Santos, André Bezerra dos |
author_role |
author |
author2 |
Farias, Raquel Studart de Barros, Amanda Nascimento de Landim, Patrícia Gadelha de Castro Holanda, Gervina Brady Moreira Rodríguez, Elisa Rodríguez Lopes, Alexandre Colzi Santos, André Bezerra dos |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Firmino, Paulo Igor Milen Farias, Raquel Studart de Barros, Amanda Nascimento de Landim, Patrícia Gadelha de Castro Holanda, Gervina Brady Moreira Rodríguez, Elisa Rodríguez Lopes, Alexandre Colzi Santos, André Bezerra dos |
dc.subject.por.fl_str_mv |
Monoaromatics Contaminated water Anaerobic treatment Microaerobic treatment Microaeration |
topic |
Monoaromatics Contaminated water Anaerobic treatment Microaerobic treatment Microaeration |
description |
As the addition of low concentrations of oxygen can favor the initial degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds, this work verified the applicability of the microaerobic technology to enhance BTEX removal in an anaerobic bioreactor supplemented with high and low co-substrate (ethanol) concentrations. Additionally, structural alterations on the bioreactor microbiota were assessed throughout the experiment. The bioreactor was fed with a synthetic BTEX-contaminated water (~ 3 mg L−1 of each compound) and operated at a hydraulic retention time of 48 h. The addition of low concentrations of oxygen (1.0 mL min−1 of atmospheric air at 27 °C and 1 atm) assured high removal efficiencies (> 80%) for all compounds under microaerobic conditions. In fact, the applicability of this technology showed to be viable to enhance BTEX removal from contaminated waters, especially concerning benzene (with a 30% removal increase), which is a very recalcitrant compound under anaerobic conditions. However, high concentrations of ethanol adversely affected BTEX removal, especially benzene, under anaerobic and microaerobic conditions. Finally, although bacterial community richness decreased at low concentrations of ethanol, in general, the bioreactor microbiota could deal with the different operational conditions and preserved its functionality during the whole experiment. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018 2023-03-24T14:22:37Z 2023-03-24T14:22:37Z |
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 |
FIRMINO, Paulo Igor Milen; FARIAS, Raquel Studart de; BARROS, Amanda Nascimento de; LANDIM, Patrícia Gadelha de Castro; HOLANDA, Gervina Brady Moreira; RODRÍGUEZ, Elisa Rodríguez; LOPES, Alexandre Colzi; SANTOS, André Bezerra dos. Applicability of microaerobic technology to enhance BTEX removal from contaminated waters. Applied Biochemistry and Biotechnology, [S. l.], v. 184, p. 1187-1199, 2018. 1559-0291 http://www.repositorio.ufc.br/handle/riufc/71418 |
identifier_str_mv |
FIRMINO, Paulo Igor Milen; FARIAS, Raquel Studart de; BARROS, Amanda Nascimento de; LANDIM, Patrícia Gadelha de Castro; HOLANDA, Gervina Brady Moreira; RODRÍGUEZ, Elisa Rodríguez; LOPES, Alexandre Colzi; SANTOS, André Bezerra dos. Applicability of microaerobic technology to enhance BTEX removal from contaminated waters. Applied Biochemistry and Biotechnology, [S. l.], v. 184, p. 1187-1199, 2018. 1559-0291 |
url |
http://www.repositorio.ufc.br/handle/riufc/71418 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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 |
Applied Biochemistry and Biotechnology |
publisher.none.fl_str_mv |
Applied Biochemistry and Biotechnology |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da Universidade Federal do Ceará (UFC) instname:Universidade Federal do Ceará (UFC) instacron:UFC |
instname_str |
Universidade Federal do Ceará (UFC) |
instacron_str |
UFC |
institution |
UFC |
reponame_str |
Repositório Institucional da Universidade Federal do Ceará (UFC) |
collection |
Repositório Institucional da Universidade Federal do Ceará (UFC) |
repository.name.fl_str_mv |
Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC) |
repository.mail.fl_str_mv |
bu@ufc.br || repositorio@ufc.br |
_version_ |
1809935804779200512 |