Applications of Biotechnology in Leather
There are any definitions for biotechnology, in according with the convention about biology diversity of ONU: Biotechnology is the use of knowledge about biologic processes and about living beings proprieties, with the end to resolve problems and create utility products. In recent years the industries have seen a growth in the use of biotechnology, using processes like biocatalyst and biotransformation. The use of biotechnology presents a lot of advantage for industries. Some advantages are: commonly the reaction or biotechnological processes occur at low temperatures and at atmospheric pressure, the process has a high space-time yield, renewable ingredients and in many cases there is reduction of environment impact. In leather production, biotechnology, mostly using enzymes, can be applied in different steps of process: soaking, unhairing, bating, dyeing, degreasing or in effluent and proteinaceous solid wastes treatment. In the present study, two processes of soaking and liming were tested, an enzyme-assisted test, using chemicals and enzymes, and a conventional test using only chemicals. From the analysis of chloride removal and fat removal from the hide and of SEM images, it was possible to realize that the enzyme-assisted is better when the variable in question is the time in the soaking, as well as it is more efficient for the unhairing stage. In other studies, the experiments to remove chromium from leather wastes through enzymatic action, showed reduction of 53.7％ of residues mass. Experiments of waste treatment with bacterial Pseudomonas aeruginosas obtained reduction of 57.40％ of chromium quantity present initially. So, biotechnology can be used in leather production and it will contribute for the reduction of pollution, principally, of soil and water.
biotechnology leather enzymes
Mariliz Gutterres Aline Dettmer Luciani A.Amaral Franck R.Souza Marcelo F.de Sousa
Federal University of Rio Grande do Sul (UFRGS), Department of Chemical Engineering, Laboratory for Buckman Laboratories Ltda Rod.Anhanguera km 1075, Sumare-SP, Brazil
国际会议
北京
英文
93-102
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）