Abdrie Seid Hassen , Tesfalem Belay Woldeamanuale
International Journal of Rural Development, Environment and Health Research(IJREH), Vol-1,Issue-3, September - October 2017, Pages 17-26,
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The leather industry is suffering from the negative impact generated by the pollutionit causes to the environment. Nearly 70% of the pollution loads of BOD, COD, and Total Dissolved Solids (TDS) are generated from soaking, liming, deliming, pickling and tanning and retanning processes. There is an enormous pressure from the various pollution control bodies to regulate and minimize the amount of pollution generated from the leatherprocessing. The need for use of alternative to chemical methods to combat pollution problem have become necessary to protect the industry and to comply with the environmental norms. In the present study, effluent samples were collected from Batu and Modjoa tannery in Ethiopia. The effluent samples were collected from all stages of processing viz., soaking,liming, deliming, pickling, Chrome tanning and Retaining. The physicochemical parameters of the tannery effluent viz.pH, alkalinity, acidity, biochemicaloxygen demand (BOD5), chemical oxygen demand (COD), totalsolids (TS), total dissolved solids (TDS), suspended solids (SS), chlorides and sulfides were determined. All the parametersincluded in this study are found to be higher than the prescribed discharge limits for tannery industries. The investigation of the tannery wastewater from different tanning processes gave a number of conclusions. The results indicate that the wastewaters from the tanneries do not satisfy the legal ranges of selected parameters discharge to inland water and to sewer.