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A RESEARCH ON INCREASING THE EFFECTIVENESS OF DEGREASING PROCESS BY USING ENZYMES | Tekstil ve Konfeksiyon | ISSN: 1300-3356
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A RESEARCH ON INCREASING THE EFFECTIVENESS OF DEGREASING PROCESS BY USING ENZYMES
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[ Volume: 18 Issue: 4 / OCTOBER-DECEMBER 2008 ]
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Altan AFŞAR (Ege University, Turkey), Fatma ÇETiNKAYA (Usak University, Turkey)
This research has been conducted for the purposes of enhancing the degreasing activity by making use of enzymes in order to remove natural fats in skins and hides, and to decrease the amount of degreasing chemicals used in the degreasing process, thus to minimize the harm of leather industry on the environment. In leather processing, in the processes of soaking, liming, bating and depickling, protease and lipase type enzymes were used that are appropriate for each step of process and then optimum degreasing treatment was realized. At the end of these processes, the amounts of the residual fats in the leathers were determined. After the completion of the studies, a decrease in the amount of fat remained in leathers processed with enzymes and an increase in the effectiveness in degreasing were observed. 0.2 % use of alkaline protease in liming stage was found the most effective. 0.1 % use of the same enzyme gives the similiar result which is more cost friendly. In addition, the remaining fat contents of the leathers after the applications of 0.5 % alkaline protease at soaking; 0.5 % alkaline lipase and combinations of alkaline protease / lipase at liming; 0.025 % and 0.5 % acid lipase in pickle leathers were found effective.
Keywords: Leather, Enzyme, Natural Fat, Degreasing, Environment
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