Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges

The objectives of this work were: (a) to analyze the effect of alkalinity, pH and initial Fe:P molar ratio (Fe0:P0) on the precipitation of orthophosphate using ferric chloride in the presence of activated sludge in order to represent conditions of simultaneous precipitation, and in exhausted wastew...

ver descrição completa

Detalhes bibliográficos
Autores: Caravelli, Alejandro Horacio, Contreras, Edgardo Martin, Zaritzky, Noemi Elisabet
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2010
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositório:CONICET Digital (CONICET)
Idioma:inglês
OAI Identifier:oai:ri.conicet.gov.ar:11336/23005
Acesso em linha:http://hdl.handle.net/11336/23005
Access Level:Acceso aberto
Palavra-chave:Activated Sludge
Ferric Chloride
Phosphorous Removal
Precipitation Kinetics
Simultaneous Precipitation
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
id AR_842b47e5e83fe2c24efc4d21db420adf
oai_identifier_str oai:ri.conicet.gov.ar:11336/23005
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
title Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
spellingShingle Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
Caravelli, Alejandro Horacio
Activated Sludge
Ferric Chloride
Phosphorous Removal
Precipitation Kinetics
Simultaneous Precipitation
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
title_short Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
title_full Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
title_fullStr Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
title_full_unstemmed Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
title_sort Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges
dc.creator.none.fl_str_mv Caravelli, Alejandro Horacio
Contreras, Edgardo Martin
Zaritzky, Noemi Elisabet
author Caravelli, Alejandro Horacio
author_facet Caravelli, Alejandro Horacio
Contreras, Edgardo Martin
Zaritzky, Noemi Elisabet
author_role author
author2 Contreras, Edgardo Martin
Zaritzky, Noemi Elisabet
author2_role author
author
dc.subject.none.fl_str_mv Activated Sludge
Ferric Chloride
Phosphorous Removal
Precipitation Kinetics
Simultaneous Precipitation
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
topic Activated Sludge
Ferric Chloride
Phosphorous Removal
Precipitation Kinetics
Simultaneous Precipitation
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
description The objectives of this work were: (a) to analyze the effect of alkalinity, pH and initial Fe:P molar ratio (Fe0:P0) on the precipitation of orthophosphate using ferric chloride in the presence of activated sludge in order to represent conditions of simultaneous precipitation, and in exhausted wastewater to simulate conditions of post-precipitation, (b) to compare the experimental results with predictions obtained from a chemical equilibrium model, and (c) to propose a mechanistic model to determine the dose of coagulant required to achieve a given orthophosphate removal degree at constant pH. Results showed that the presence of biomass did not affect the orthophosphate precipitation; however, addition of ferric chloride caused a drop of pH to values not compatible with the normal activity of activated sludges. For this reason, the wastewater was supplemented with NaHCO3; when 1gL-1 NaHCO3 was added, orthophosphate removals higher than 97% and pH above 6.2 were obtained using Fe0:P0=1.9. Precipitation assays at constant pH showed that Fe(III) hydrolysis and FePO4 precipitation reaction compete with each other.Calculations using a chemical equilibrium model (CHEAQS) predicted that ferric phosphate precipitation should not take place if pH is higher than about 7.8. However, experimental results showed that ferric phosphate precipitation occurred even at pH 9. For this reason, a mechanistic model was proposed to predict orthophosphate concentrations as a function of Fe0:P0 at constant pH. The model can be applied to calculate the minimum Fe(III) concentration required to achieve a given discharge limit for orthophosphate as a function of its initial concentration and pH.
publishDate 2010
dc.date.none.fl_str_mv 2010-05-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/23005
Caravelli, Alejandro Horacio; Contreras, Edgardo Martin; Zaritzky, Noemi Elisabet; Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges; Elsevier Science; Journal of Hazardous Materials; 177; 1-3; 11-5-2010; 199-208
0304-3894
CONICET Digital
CONICET
url http://hdl.handle.net/11336/23005
identifier_str_mv Caravelli, Alejandro Horacio; Contreras, Edgardo Martin; Zaritzky, Noemi Elisabet; Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges; Elsevier Science; Journal of Hazardous Materials; 177; 1-3; 11-5-2010; 199-208
0304-3894
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S030438940901989X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jhazmat.2009.12.018
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799195427156787200
spelling Phosphorous removal in batch systems using ferric chloride in the presence of activated sludgesCaravelli, Alejandro HoracioContreras, Edgardo MartinZaritzky, Noemi ElisabetActivated SludgeFerric ChloridePhosphorous RemovalPrecipitation KineticsSimultaneous Precipitationhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2The objectives of this work were: (a) to analyze the effect of alkalinity, pH and initial Fe:P molar ratio (Fe0:P0) on the precipitation of orthophosphate using ferric chloride in the presence of activated sludge in order to represent conditions of simultaneous precipitation, and in exhausted wastewater to simulate conditions of post-precipitation, (b) to compare the experimental results with predictions obtained from a chemical equilibrium model, and (c) to propose a mechanistic model to determine the dose of coagulant required to achieve a given orthophosphate removal degree at constant pH. Results showed that the presence of biomass did not affect the orthophosphate precipitation; however, addition of ferric chloride caused a drop of pH to values not compatible with the normal activity of activated sludges. For this reason, the wastewater was supplemented with NaHCO3; when 1gL-1 NaHCO3 was added, orthophosphate removals higher than 97% and pH above 6.2 were obtained using Fe0:P0=1.9. Precipitation assays at constant pH showed that Fe(III) hydrolysis and FePO4 precipitation reaction compete with each other.Calculations using a chemical equilibrium model (CHEAQS) predicted that ferric phosphate precipitation should not take place if pH is higher than about 7.8. However, experimental results showed that ferric phosphate precipitation occurred even at pH 9. For this reason, a mechanistic model was proposed to predict orthophosphate concentrations as a function of Fe0:P0 at constant pH. The model can be applied to calculate the minimum Fe(III) concentration required to achieve a given discharge limit for orthophosphate as a function of its initial concentration and pH.Fil: Caravelli, Alejandro Horacio. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Contreras, Edgardo Martin. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería; ArgentinaFil: Zaritzky, Noemi Elisabet. Universidad Nacional de La Plata. Facultad de Ingeniería; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaElsevier Science2010-05-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/23005Caravelli, Alejandro Horacio; Contreras, Edgardo Martin; Zaritzky, Noemi Elisabet; Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges; Elsevier Science; Journal of Hazardous Materials; 177; 1-3; 11-5-2010; 199-2080304-3894CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S030438940901989Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jhazmat.2009.12.018info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:52:11Zoai:ri.conicet.gov.ar:11336/23005instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:52:11.624CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
score 15.198674

Registros relacionados