Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon

Autores
Ferro Orozco, Ana Micaela; Contreras, Edgardo Martín; Bértola, Nora Cristina; Zaritzky, Noemí Elisabet
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.
Centro de Investigación y Desarrollo en Criotecnología de Alimentos
Materia
Química
Activated sludge
Powdered activated carbon
Hexavalent chromium
Trivalent chromium
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/101032

id SEDICI_ab3ea7fb8ff876744b01ffe8cf24ee49
oai_identifier_str oai:sedici.unlp.edu.ar:10915/101032
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbonFerro Orozco, Ana MicaelaContreras, Edgardo MartínBértola, Nora CristinaZaritzky, Noemí ElisabetQuímicaActivated sludgePowdered activated carbonHexavalent chromiumTrivalent chromiumThe addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.Centro de Investigación y Desarrollo en Criotecnología de Alimentos2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf239-244http://sedici.unlp.edu.ar/handle/10915/101032enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/76071info:eu-repo/semantics/altIdentifier/url/https://www.ajol.info/index.php/wsa/article/view/49077info:eu-repo/semantics/altIdentifier/issn/1816-7950info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v33i2.49077info:eu-repo/semantics/altIdentifier/hdl/11336/76071info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:21:00Zoai:sedici.unlp.edu.ar:10915/101032Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:21:00.707SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
title Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
spellingShingle Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
Ferro Orozco, Ana Micaela
Química
Activated sludge
Powdered activated carbon
Hexavalent chromium
Trivalent chromium
title_short Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
title_full Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
title_fullStr Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
title_full_unstemmed Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
title_sort Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
dc.creator.none.fl_str_mv Ferro Orozco, Ana Micaela
Contreras, Edgardo Martín
Bértola, Nora Cristina
Zaritzky, Noemí Elisabet
author Ferro Orozco, Ana Micaela
author_facet Ferro Orozco, Ana Micaela
Contreras, Edgardo Martín
Bértola, Nora Cristina
Zaritzky, Noemí Elisabet
author_role author
author2 Contreras, Edgardo Martín
Bértola, Nora Cristina
Zaritzky, Noemí Elisabet
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Activated sludge
Powdered activated carbon
Hexavalent chromium
Trivalent chromium
topic Química
Activated sludge
Powdered activated carbon
Hexavalent chromium
Trivalent chromium
dc.description.none.fl_txt_mv The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.
Centro de Investigación y Desarrollo en Criotecnología de Alimentos
description The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/101032
url http://sedici.unlp.edu.ar/handle/10915/101032
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/76071
info:eu-repo/semantics/altIdentifier/url/https://www.ajol.info/index.php/wsa/article/view/49077
info:eu-repo/semantics/altIdentifier/issn/1816-7950
info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v33i2.49077
info:eu-repo/semantics/altIdentifier/hdl/11336/76071
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
239-244
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616084987052032
score 13.070432