[article]
| Titre : |
Characterization of waste materials in tanneries for better ecological uses |
| Type de document : |
texte imprimé |
| Auteurs : |
A. Rangel-Serrano, Auteur ; M. Maldonado V., Auteur ; K. Kösters, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 43-48 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Tanning processes generate significant volumes of by-products and waste materials, among which fleshings represent the major proportion. This material can be obtained either before or after the liming treatment. The liming treatment alters the fat and protein content in the residual lleshings. The principal objective of this project is to develop a method to re-use an ample portion of these pretanned wastes. Among the already identified materials in the laboratory, we have: delimed fleshings, limed fleshings, fatty extraction residues and residual, immunized hair. It is our main concern to recover the proteins from these by-products, which constitute their majority component. Preliminary results show that during liming up to 31 percent of the soluble proteins are lost, as well as 50 percent of its fats, compared to fleshing without calcium hydroxide treatment. At the industrial scale, these differences result in variable fat recovery conditions and high volumes of low valued residual sludge. Residual hair was found to have a high protein content of 82 percent, with nitrogen content of 13 percent. Delimed fleshings have been found to contain 15 percent nitrogen. Here we would like to stress that both delimed fleshings and residual hair might well constitute an important source of protein with interesting uses as biological fertilizers in agriculture or horticulture. A series of fertilization tests have been carried out in a greenhouse. |
| En ligne : |
https://drive.google.com/file/d/1aJ7X1Vu8ErRpzSEaAKGTa1JiduyrqXGf/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4092 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 2 (02/2003) . - p. 43-48
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Characterization of waste materials in tanneries for better ecological uses in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
