Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 2 (03-04/2013) . - p. 62-67 Titre : Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; A. Crispim, Auteur ; A. Sampaio, Auteur ; E. Ramalho, Auteur ; F. Crispim, Auteur ; N. S. Caetano, Auteur ; P. C. Silva, Auteur Année de publication : 2013 Article en page(s) : p. 62-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Propriétés mécaniques Déchets -- Valorisation Echarnage Extraction (chimie) Glutaraldéhyde Huiles et graisses Hydrolysats de protéines Hydrolyse Produits de nourriture du cuir Protéines Sulfates Le sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-. Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The present work had as its main objective creating added value by production of fat and hydrolyzed protein. To this end, fleshings were treated by hydrolysis with regard to the influence of various factors. The best result was found for a temperature of 60°C, 4 hours of hydrolysis, 2% of enzyme and 100% of water, with a fat extraction yield of 93%. The fat obtained through the hydrolysis process was used to produce sulphated oils. The protein hydrolysate was concentrated to about 40% of solids content and used to prepare co-products of protein hydrolysage and glutaraldehyde. Sulphated oils were applied in leather fatliquoring and the different protein hydrolysates were tested in leather retannage. The leather samples obtained were evaluated by physical-mechanical tests and the results were compared to those obtained through a standard process. the results were very satisfactory and, in some cases better than the specified standard. The process of adding value to this waste results in a double advantage for the leather industry, reducing the environmental impact and allowing production of alternative products for leather fatliquoring and retannage. Note de contenu : - MATERIALS AND METHODS : Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation - Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation En ligne : https://drive.google.com/file/d/1L81N_8EBYtQFg4_VzHytHtl0U2zipgd1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18143 [article]

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Biodiesel from fleshings / A. Crispim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 1 (01-02/2010)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 1 (01-02/2010) . - p. 39-41 Titre : Biodiesel from fleshings Type de document : texte imprimé Auteurs : A. Crispim, Auteur ; R. Fernandes, Auteur ; P. C. Silva, Auteur ; N. S. Caetano, Auteur ; L. Ramos, Auteur ; E. Ramalho, Auteur ; A. Sampaio, Auteur Année de publication : 2010 Article en page(s) : p. 39-41 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Tanneries  Déchets  solides  Graisse  écharnage  Valorisation  Production  biocarburant  Biodiésel Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanneries generate a large amount of solid wastes. Lime fleshings, one of those solid wastes, are a very important fat source although normally they are not used and are disposed off representing a high cost for tanners. A process to recover fat from such fleshings was developed, introducing a new value-adding route through the use of fat for biodiesel production. Biodiesel obtained from this fat material was characterized by parameters according to EN 14214 standard, showing good accordace in almost all of the evaluated specifications. However, we still needed to adjust the process in order to improve parameters, like moisture and ester content, that are close we still needed to adjust the process in order to improvve parameters, like moisture and ester content, that are c lose to the limits. An economic evaluation of the fat recovery and usage as raw material for biodiesel production was done, showing an economic potential when compared to vegetable oils. It was demonstrated that a fat selling price of 350 E/ton, with some margin for reduction, is possible. This price is better than the normal price of vegetable oils, which lies between 500 and 700 E/ton. En ligne : https://drive.google.com/file/d/1MqQY5Lwlz_VNNBxY0BJhijsQbXs706Tb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8314 [article]

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