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Application of an alkaline protease in leather processing: an ecofriendly approach
Institution:1. Central Leather Research Institute, Microbiology Division, 600 020 Chennai, India;2. Central Leather Research Institute, Leather Processing Division, 600 020 Chennai, India;1. College of Resources & Environment, Shaanxi University of Science & Technology, Xi''an 710021, Shaanxi Province, PR China;2. Key Laboratory of Amxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi''an 710021, Shaanxi Province, PR China;3. College of Foreign Languages and Communications, Shaanxi University of Science and Technology, Xi''an 710021, Shaanxi Province, PR China;1. Key Laboratory of Leather Chemistry and Engineering, Ministry of Education and College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, PR China;2. Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education and College of Life Sciences, Sichuan University, Chengdu 610065, PR China;1. University of Sfax, National Engineering School of Sfax, Laboratory of Biochemistry and Enzymatic Engineering of Lipases, 3038 Sfax, Tunisia;2. Univ Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5, rue de la Doua, F-69100 Villeurbanne, France;3. National Center for Leather and Footwear, 2033 Megrine, Tunisia;4. SO.SA.CUIR Tanning Company, 4070 M’Saken, Tunisia;5. University of Sfax, Higher Institute of Biotechnology of Sfax, 3038 Sfax, Tunisia;6. Aix Marseille Univ, CNRS, UMR 7281, Bioénergétique et Ingénierie des Protéines, 13009 Marseille, France;1. The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, PR China;2. National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, PR China;3. School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, PR China
Abstract:Proteolytic enzyme isolated from Aspergillus tamarii prepared by solid state fermentation was studied for dehairing of goat skins in the tannery. The stability of the enzyme for dehairing was optimized at different environmental parameters. Unhairing of goat skins could be obtained at pH 9–11 and temperatures 30–37°C with enzyme concentration of 1% w/v and incubation periods of 18–24 h. The physical properties of the experimental leathers in comparison with the control sets gave better results with respect to tensile strength and elongation at break.
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