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A study was conducted to characterize Modjo tannery effluent wastewaterand determine its impact on the Modjo River using some physicochemicalparameters. Accordingly, three tannery wastewater samples along wastewaterchannel at different distances have been taken and three river water samplesone upstream and two downstream were collected along the river to determineits impact on the river. The samples have been analyzed for temperature, pH,electrical conductivity EC, total dissolved solids TDS, total suspendedsolid TSS, chlorideCl﹣, biological oxygen demand BOD5,chemical oxygen demand COD, total ammonia asN, total nitrogen, total phosphorus and sulphide. The result of tannery wastewater showed that the values of temperature,pH, EC, TDS, TSS, Cl﹣, BOD5, COD, total ammonia, total nitrogen, total phosphorus and sulphide along thewastewater channel ranged from 26.97℃ to 24.93℃,9.33 to 8.33, 15,670.00 to 14,496.67 mg·L﹣1, 9370.00 to 8723.33 mg·L﹣1, 4979.33 to 2647.67 mg·L﹣1, 6111.67 to 5555.78 mg·L﹣1 , 960.34 to 842.00 mg·L﹣1,2011.00 to 1950.75 mg·L﹣1, 520.44 to 401.23 mg·L﹣1,720.46 to 665.43 mg·L﹣1, 30.12 to 19.55 mg·L﹣1, 35.56 to21.05 mg·L﹣1 respectively. And most of the effluent characteristics except pH and temperature werebeyond the provisional discharge limit of tannery effluent to water body set bythe Ethiopian Environmental Protection Authority EEPA and Federal EnvironmentalProtection Agency FEPA. Analysis of variance ANOVA also showed thatvariation among sampling points was statistically significant p < 0.5. Similarly the levels of allthese physicochemical parameters in the downstream site of the river werehigher as compared to the values obtained from the upstream site control. Thisindicated that the downstream site of the river was polluted as the result ofthe direct discharge of the tannery effluent to it.

KEYWORDS

Modjo Tannery, Modjo River, Wastewater, Physicochemical Parameters, Water Pollution

Cite this paper

Amanial, H. 2016 Physico Chemical Characterization of Tannery Effluent and Its Impact on the Nearby River. Open Access Library Journal, 3, 1-8. doi: 10.4236-oalib.1102427.





Autor: Haile Reda Amanial

Fuente: http://www.scirp.org/



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