| Titre : |
Recycling in goat skin lime unhairing |
| Type de document : |
texte imprimé |
| Auteurs : |
A. Crispim, Auteur ; A. Sampaio, Auteur ; N. S. Caetano, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 59-62 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bain de trempe
Centrifugation
Chaulage
Cuirs et peaux de chèvres
Eau -- Consommation -- Réduction
Eaux usées
Filtration
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The environment is a factor of concern in our lives that forces society to search for an implement technologies that enable cleaner processes in industry. The leather industry is known to be a polluting activity that needs large amounts of water and at the same lime, produces a large flow of alkaline effluents rich in sulphide. The work in this study aims to minimize water and chemical consumption by recycing the liming bath used in goat skin unhairing.
Two systems were tested for recycing of the liming bath from a hair-burning process (centrifugation and ultrafiltration) but for recycling the liming bath from a hair-saving process the only system tested was ultrafiltration. These recycling systems provided a good reduction in COD with better results when ultrafiltration was applied.
The chemical reduction were 33 % of sodium sulphide. 40 % of anti-wrinkle and sodium sulphydrate and 25 % lime for the hair-burning liming process with recycling. The chemical reductions were 32 % and 25 % lime with an additional consumption of enzyme sodium sulpide, 25 % sodium sulphydrate and 25 % lime, with an aditional consumption of enzyme for the hair-saving liming process with recycling. A reduction in water used of 80 % and 50 % respectively in the hair-burning and hair-saving process was achieved. A brief economic analysis of the recycling systems used for the hair-burning process permitted us to conclude that both options are economically viable. The payback time in the recycling system using centrifugation is 3 years while for the recycling system with ultrafiltration the payback time is 4 years. |
| En ligne : |
https://drive.google.com/file/d/1F7XdVDElJRImTIXYEYw7ZGvbMBsIb7U0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11593 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 2 (03-04/2011) . - p. 59-62
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Recycling in goat skin lime unhairing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 2 (03-04/2011)
