Use of ash from sewage sludge in the preparation of desulfurant sorbents

This work aims to develop new uses for sewage sludge, which is a byproduct of municipal wastewater treatment plants, by examining the calcination of this waste, the characterization of ashes is obtained, and its use to prepare desulfurant sorbents. Samples of sewage sludge were obtained from a local...

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Detalhes bibliográficos
Autores: Fernández Ferreras, Josefa|||0000-0003-0250-3130, García Posadas, Hipólito, Rico Gutiérrez, José Luis|||0000-0002-0026-7130, Renedo Omaechevarría, Josefina
Formato: artículo
Fecha de publicación:2010
País:España
Recursos:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/1880
Acesso em linha:http://hdl.handle.net/10902/1880
Access Level:acceso abierto
Palavra-chave:Sewage sludge
Calcination
Desulfurization sorbent
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spelling Use of ash from sewage sludge in the preparation of desulfurant sorbentsFernández Ferreras, Josefa|||0000-0003-0250-3130García Posadas, HipólitoRico Gutiérrez, José Luis|||0000-0002-0026-7130Renedo Omaechevarría, JosefinaSewage sludgeCalcinationDesulfurization sorbentThis work aims to develop new uses for sewage sludge, which is a byproduct of municipal wastewater treatment plants, by examining the calcination of this waste, the characterization of ashes is obtained, and its use to prepare desulfurant sorbents. Samples of sewage sludge were obtained from a local municipal wastewater treatment plant. This plant applies a pre-treatment followed by a biological treatment, where anaerobic digestion and centrifugation reduces the sludge. Three samples were characterized (in humidity, volatile and fixed solids content), dried, and ignited at two temperatures, 550 and 750 C. The composition of the ash obtained at both ignition temperatures was studied by x-ray fluorescent spectroscopy and the BET specific surface area of the two ashes and of the prepared sorbents was measured. Ash composition was similar for the two temperatures tested, where the components were Si, Ca, Al, Fe, P, S, Mg, K, Cl, Zn and Ti. BET specific surface area values indicate that the lower temperature of calcination produces ash with the highest SSA values (18 m2/g against near 10 m2/g). Preparation of desulfurant sorbents was carried out by mixing the ash with CaO or Ca(OH)2 at room temperature and different experimental conditions. The BET SSA of the prepared desulfurant sorbents showed higher values for the sorbents prepared with the ashes obtained at the lowest temperature. The behaviour of the ash and the prepared sorbents was tested in a fixed bed reactor at 58 C with a flue gas containing 5000 ppm of SO2 with a relative humidity of 55%. Results in the desulfurization process show that the calcium from the sludge seems more efficient than the calcium added as CaO or Ca(OH)2 to prepare the sorbents.Our acknowledgment to D.G.I. of M.C. y T. for financial support of this work under project: MAT2006-03683.Berkeley Electronic PressUniversidad de Cantabria20102010-01-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/1880International Journal of Chemical Reactor Engineering, 2010, 8(1), 67reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/18802026-06-02T12:39:31Z
dc.title.none.fl_str_mv Use of ash from sewage sludge in the preparation of desulfurant sorbents
title Use of ash from sewage sludge in the preparation of desulfurant sorbents
spellingShingle Use of ash from sewage sludge in the preparation of desulfurant sorbents
Fernández Ferreras, Josefa|||0000-0003-0250-3130
Sewage sludge
Calcination
Desulfurization sorbent
title_short Use of ash from sewage sludge in the preparation of desulfurant sorbents
title_full Use of ash from sewage sludge in the preparation of desulfurant sorbents
title_fullStr Use of ash from sewage sludge in the preparation of desulfurant sorbents
title_full_unstemmed Use of ash from sewage sludge in the preparation of desulfurant sorbents
title_sort Use of ash from sewage sludge in the preparation of desulfurant sorbents
dc.creator.none.fl_str_mv Fernández Ferreras, Josefa|||0000-0003-0250-3130
García Posadas, Hipólito
Rico Gutiérrez, José Luis|||0000-0002-0026-7130
Renedo Omaechevarría, Josefina
author Fernández Ferreras, Josefa|||0000-0003-0250-3130
author_facet Fernández Ferreras, Josefa|||0000-0003-0250-3130
García Posadas, Hipólito
Rico Gutiérrez, José Luis|||0000-0002-0026-7130
Renedo Omaechevarría, Josefina
author_role author
author2 García Posadas, Hipólito
Rico Gutiérrez, José Luis|||0000-0002-0026-7130
Renedo Omaechevarría, Josefina
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Sewage sludge
Calcination
Desulfurization sorbent
topic Sewage sludge
Calcination
Desulfurization sorbent
description This work aims to develop new uses for sewage sludge, which is a byproduct of municipal wastewater treatment plants, by examining the calcination of this waste, the characterization of ashes is obtained, and its use to prepare desulfurant sorbents. Samples of sewage sludge were obtained from a local municipal wastewater treatment plant. This plant applies a pre-treatment followed by a biological treatment, where anaerobic digestion and centrifugation reduces the sludge. Three samples were characterized (in humidity, volatile and fixed solids content), dried, and ignited at two temperatures, 550 and 750 C. The composition of the ash obtained at both ignition temperatures was studied by x-ray fluorescent spectroscopy and the BET specific surface area of the two ashes and of the prepared sorbents was measured. Ash composition was similar for the two temperatures tested, where the components were Si, Ca, Al, Fe, P, S, Mg, K, Cl, Zn and Ti. BET specific surface area values indicate that the lower temperature of calcination produces ash with the highest SSA values (18 m2/g against near 10 m2/g). Preparation of desulfurant sorbents was carried out by mixing the ash with CaO or Ca(OH)2 at room temperature and different experimental conditions. The BET SSA of the prepared desulfurant sorbents showed higher values for the sorbents prepared with the ashes obtained at the lowest temperature. The behaviour of the ash and the prepared sorbents was tested in a fixed bed reactor at 58 C with a flue gas containing 5000 ppm of SO2 with a relative humidity of 55%. Results in the desulfurization process show that the calcium from the sludge seems more efficient than the calcium added as CaO or Ca(OH)2 to prepare the sorbents.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/1880
url http://hdl.handle.net/10902/1880
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Berkeley Electronic Press
publisher.none.fl_str_mv Berkeley Electronic Press
dc.source.none.fl_str_mv International Journal of Chemical Reactor Engineering, 2010, 8(1), 67
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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