Recycling Of Liquid Tannery Wastes

Abstract

Over the years, treatment of tannery waste-Water put a considerable burden on the total cost of production, be it pickled, in wet-blue, crust or finished leather. After 1980 a very stringent regulation has been imposed on the quality and purity of the waste waters that go to the drain. The high amount of money charged for effluent tannery waste-water, lead most of the tanneries to close down, With increasingly stringent environmental requipments, it has become necessary to reduce the pollution load in waste-water to a minimum. This has been done by treating tannery waste-water biologically with expensive undertaking as no income or revenue is obtained at the end. For these reasons, recycling of spent solutions from soaking through retannage has been applied in this work with a considerable saving of, chemicals and water, as well as protection of the environment of these polluting chemicals. Hence recycling saves chemicals and reduces the cost of production. The leather that processed using recycled solution that adjusted with a make-up showed a comparatively good physical and chemical properties. The tensile strength obtained is acceptable, the elongation at grain crack is very good, the load at grain burst is also acceptable. In conclusion it is recommended to apply recycling of tannery used solutions from soaking through retanning processes. The total cost will be reduced, then there will be saving in chemicals and clean environment.