Reduction of waste chrome levels in tannery wastewater: Optimized direct recycling
Autor(a) principal: | |
---|---|
Data de Publicação: | 2006 |
Outros Autores: | |
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 |