Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling

Detalhes bibliográficos
Autor(a) principal: Crispim, A.
Data de Publicação: 2006
Outros Autores: Mota, Manuel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/74302
Resumo: The chrome tanning process is the most popular tanning method but it results a considerable discharge of chromium to the wastewater. Various processes have been developed to increase the up-take of chromium by the hide with success, but there remains a major chromium discharge to the wastewater. The wastewater from the tanning process can be reused directly or indirectly but these recycling processes can present problems related to the accumulation of undesirable substances (salts, fat, protein, etc.) and irregularities from batch to batch. The present work is devoted to the development of a direct recycling process that associates a high chromium up-take process with recycling to the pickling bath and then disposal of this bath after pickling. A reduction of the chromium offer to between 4.5% and 5.5% is achieved, against typical values of between 7% and 8%. Good results are obtained for chromium discharge to the wastewater especially when the splitting is done in the lime state where values of chromium about 50 mg/L are obtained.
id RCAP_172445441dd657a693c366d912b80725
oai_identifier_str oai:repositorium.sdum.uminho.pt:1822/74302
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Reduction of waste chrome levels in tannery wastewater: Optimized direct recyclingEngenharia e Tecnologia::Biotecnologia AmbientalScience & TechnologyThe chrome tanning process is the most popular tanning method but it results a considerable discharge of chromium to the wastewater. Various processes have been developed to increase the up-take of chromium by the hide with success, but there remains a major chromium discharge to the wastewater. The wastewater from the tanning process can be reused directly or indirectly but these recycling processes can present problems related to the accumulation of undesirable substances (salts, fat, protein, etc.) and irregularities from batch to batch. The present work is devoted to the development of a direct recycling process that associates a high chromium up-take process with recycling to the pickling bath and then disposal of this bath after pickling. A reduction of the chromium offer to between 4.5% and 5.5% is achieved, against typical values of between 7% and 8%. Good results are obtained for chromium discharge to the wastewater especially when the splitting is done in the lime state where values of chromium about 50 mg/L are obtained.info:eu-repo/semantics/publishedVersionSociety of Leather Technologists and ChemistsUniversidade do MinhoCrispim, A.Mota, Manuel20062006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/74302engRibeiro, A.; Mota, Manuel, Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling. Journal of the Society of Leather Technologists and Chemists, 90(6), 239-242, 20060144-0322info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:09:12Zoai:repositorium.sdum.uminho.pt:1822/74302Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:00:33.801452Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
title Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
spellingShingle Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
Crispim, A.
Engenharia e Tecnologia::Biotecnologia Ambiental
Science & Technology
title_short Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
title_full Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
title_fullStr Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
title_full_unstemmed Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
title_sort Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
author Crispim, A.
author_facet Crispim, A.
Mota, Manuel
author_role author
author2 Mota, Manuel
author2_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Crispim, A.
Mota, Manuel
dc.subject.por.fl_str_mv Engenharia e Tecnologia::Biotecnologia Ambiental
Science & Technology
topic Engenharia e Tecnologia::Biotecnologia Ambiental
Science & Technology
description The chrome tanning process is the most popular tanning method but it results a considerable discharge of chromium to the wastewater. Various processes have been developed to increase the up-take of chromium by the hide with success, but there remains a major chromium discharge to the wastewater. The wastewater from the tanning process can be reused directly or indirectly but these recycling processes can present problems related to the accumulation of undesirable substances (salts, fat, protein, etc.) and irregularities from batch to batch. The present work is devoted to the development of a direct recycling process that associates a high chromium up-take process with recycling to the pickling bath and then disposal of this bath after pickling. A reduction of the chromium offer to between 4.5% and 5.5% is achieved, against typical values of between 7% and 8%. Good results are obtained for chromium discharge to the wastewater especially when the splitting is done in the lime state where values of chromium about 50 mg/L are obtained.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-01-01T00:00:00Z
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://hdl.handle.net/1822/74302
url http://hdl.handle.net/1822/74302
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ribeiro, A.; Mota, Manuel, Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling. Journal of the Society of Leather Technologists and Chemists, 90(6), 239-242, 2006
0144-0322
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 Society of Leather Technologists and Chemists
publisher.none.fl_str_mv Society of Leather Technologists and Chemists
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799132401800052736