DOI: 10.5593/SGEM2015/B41/S17.042


G. Coara, L. Albu, M. Florescu, R. Mocanu, G. Lazaroiu
Friday 25 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-38-4 / ISSN 1314-2704, June 18-24, 2015, Book4, 323-328 pp

The leather processing industry intended for various applications is a strongly polluting industry generating a significant amount of solid waste containing protein and animal fat. The paper proposes a technical solution for separating fats from animal protein and their energy recovery.
The process and plant for separation of fat from protein used on pelt waste after washing and unhairing raw hides. The resulting animal fat is then washed, purified and filtered.
Animal fat has a high energetic value and is exploited as such or modified by transesterification as fuel for diesel engines. Biodiesel from animal fat is a clean fuel compared to diesel oil, whose use does not require structural modifications of the engine.
Natural leather also has half the calorific value of diesel oil and animal fat can be energetically exploited by burning, gasification or turned into biogas. The latter solution is developed in the paper with its problematic, advantages, risks and disadvantages. The energy resulting from turning protein into a biogas generator is used in thermal processes within the tannery or stored for other applications.

Keywords: renewable energy, biogas, biodiesel