Adding Value to Tannery Fleshings: Part I - Oils and Protein Hydrolysates Production and Application

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Braganca, I (Author) Other; Crispim, A (Author) Other; Sampaio, A (Author) Other; Ramalho, E (Author) Other; Crispim, F (Author) Other; Nídia de Sá Caetano (Author) FEUP; Silva, PC (Author) Other

Journal

Title: Journal of the Society of Leather Technologies and Chemists

Vol. 97

Pages: 62-67

ISSN: 0144-0322

Publisher: Society of Leather Technologists and Chemists

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 3 Citations

Associated Projects

UI0511 - PROJECTO ESTRATÉGICO - UI 511 - 2013-2014

Other information

Authenticus ID: P-005-2MS

Abstract (EN): 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 degrees 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 hydrolysate 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6