| Titre : |
Unhairing technology involving hair protection adaptation of a recirculation technique |
| Type de document : |
texte imprimé |
| Auteurs : |
Carlos S. Cantera, Auteur ; Victor D. Vera, Auteur ; L. Fernà ndez Crespo, Auteur ; R. Escobar, Auteur |
| Année de publication : |
1995 |
| Article en page(s) : |
p. 12-17 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux
Cuirs et peaux -- Déchets -- Recyclage
Déchets -- Réduction
Déchets industriels -- Recyclage
Epilage
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The application of the hair-saving process has mainly resulted in a reduction of the organic content and suspended-settleable solids in the beamhouse effluent.
Aiming at decreasing the volume of effluents from unhairing and at optimizing the amount of products used in such a process in a tannery producing upholstery leather, a study concerning recycling was made of the effluents from a hair-saving "chemical unhairing" process that is in current use.
By means of trials both at laboratory scale on a pilot plant, the recirculation of an effluent ("mixed liquor") - including unhairing liquid wastes and waste water from the first discontinuous washing - was used at the stages of alkaline conditioning, hair immunization, unhairing and liming.
Fifteen unhairing trials were performed at the CITEC's pilot plant with 7 bovine hides in each cycle ; when the pelt stage was reached, the process was continued at the tannery.
The results obtained led to the following conclusions :
. An adaptation of the recycling technique to a hair-saving process is applicable at the liming, immunization and unhairing stages ;
. The features of the "re-circulated leather" are similar to those of the finished upholstery product made by the tannery ;
. This recycling technique allows for an 88 % reduction in the volume of unhairing wastes and for 43 and 20 % reduction in the consumption of lime and sodium sulphide, respectively. |
| En ligne : |
https://drive.google.com/file/d/1wfqU4Ly8LnaqtRMwBcAENil7q8_14Kle/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8229 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 1 (01-02/1995) . - p. 12-17
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