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Abstract:
Treatment and disposal of wastewater in tanneries is expensive and important. Most tanneries in Europe closed down due to high cost of treatment. Tanneries have to treat their wastewater up to the standard specifications. This requires building of an efficient waste treatment plant with high fixed capital in addition to aworking capital. Once the waste treatment factory starts operating, its operating cost continues without any income. When the total cost is allocated to the product, the price per unit increases and one can hardly get the minimum rates of return. This leads to neglection of the waste treatment plant through irregular maintenanceand financial support, and consequently the treated wastewater will not comply with the standard specifications. On the other hand, application of clean technology through recycling will save chemicals, water and protect the environment; its application is simple, less expensive with less operating cost. In this study a cost-effectiveness comparison between biological treatment, precipitation method, evaporation method for chromium sulphate solution reduction in the discharge effluent and the recycling method will be investigated.
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