Leather shavings treatment - an enzymatic approach
Autor(a) principal: | |
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Data de Publicação: | 2003 |
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/1822/1661 |
Resumo: | The present work is devoted to illustrating the potential application of enzymes for recycling wet-blue shavings. Two approaches were made in parallel. To recycle wet-blue shavings, the classical method uses grinding, followed by agglomeration and drying. In the present work, grinding was not done, instead an acidic protease-pepsin was used followed by a cross-linking with glutaraldehyde. The resultant paste was then pressed and dried. Practically no chromium was released to the aqueous medium. The agglomerate proved to be useful in shoemaking. The second approach made use of an alkaline protease which completely digested the wet-blue shavings and separated the chromium from the leather. The chromium could then be removed and the protein hydrolysate used as a replacement product for hide finishing. Pilot assays demonstrated the viability of this technology for the leather industry. The work follows from that reported in Unhairing with Enzymes-see JSLTC, 2003. 87, p198. |
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spelling |
Leather shavings treatment - an enzymatic approachScience & TechnologyThe present work is devoted to illustrating the potential application of enzymes for recycling wet-blue shavings. Two approaches were made in parallel. To recycle wet-blue shavings, the classical method uses grinding, followed by agglomeration and drying. In the present work, grinding was not done, instead an acidic protease-pepsin was used followed by a cross-linking with glutaraldehyde. The resultant paste was then pressed and dried. Practically no chromium was released to the aqueous medium. The agglomerate proved to be useful in shoemaking. The second approach made use of an alkaline protease which completely digested the wet-blue shavings and separated the chromium from the leather. The chromium could then be removed and the protein hydrolysate used as a replacement product for hide finishing. Pilot assays demonstrated the viability of this technology for the leather industry. The work follows from that reported in Unhairing with Enzymes-see JSLTC, 2003. 87, p198.Society of Leather Technologists and ChemistsUniversidade do MinhoCrispim, A.Mota, M.2003-092003-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/1661eng"Journal of the society of leather technologists and chemists". ISSN 0144-0322. 87:5 (2003) 203-207.0144-0322info: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:RCAAP2023-07-21T12:18:43Zoai:repositorium.sdum.uminho.pt:1822/1661Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:11:34.266789Repositório 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 |
Leather shavings treatment - an enzymatic approach |
title |
Leather shavings treatment - an enzymatic approach |
spellingShingle |
Leather shavings treatment - an enzymatic approach Crispim, A. Science & Technology |
title_short |
Leather shavings treatment - an enzymatic approach |
title_full |
Leather shavings treatment - an enzymatic approach |
title_fullStr |
Leather shavings treatment - an enzymatic approach |
title_full_unstemmed |
Leather shavings treatment - an enzymatic approach |
title_sort |
Leather shavings treatment - an enzymatic approach |
author |
Crispim, A. |
author_facet |
Crispim, A. Mota, M. |
author_role |
author |
author2 |
Mota, M. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Crispim, A. Mota, M. |
dc.subject.por.fl_str_mv |
Science & Technology |
topic |
Science & Technology |
description |
The present work is devoted to illustrating the potential application of enzymes for recycling wet-blue shavings. Two approaches were made in parallel. To recycle wet-blue shavings, the classical method uses grinding, followed by agglomeration and drying. In the present work, grinding was not done, instead an acidic protease-pepsin was used followed by a cross-linking with glutaraldehyde. The resultant paste was then pressed and dried. Practically no chromium was released to the aqueous medium. The agglomerate proved to be useful in shoemaking. The second approach made use of an alkaline protease which completely digested the wet-blue shavings and separated the chromium from the leather. The chromium could then be removed and the protein hydrolysate used as a replacement product for hide finishing. Pilot assays demonstrated the viability of this technology for the leather industry. The work follows from that reported in Unhairing with Enzymes-see JSLTC, 2003. 87, p198. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-09 2003-09-01T00:00:00Z |
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/1822/1661 |
url |
http://hdl.handle.net/1822/1661 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Journal of the society of leather technologists and chemists". ISSN 0144-0322. 87:5 (2003) 203-207. 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 |
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1799132548417191936 |