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Journal of Environmental Science and Technology

Year: 2008 | Volume: 1 | Issue: 2 | Page No.: 56-64
Research Article

An Assessment of the Impact of Abattoir Effluents on River Illo, Ota, Nigeria

D.O. Omole
Department of Civil Engineering, College of Science and Technology, Covenant University, Canaanland, Km 10 Idiroko Road, Ota, Nigeria
E.O. Longe
Department of Civil and Environmental Engineering, University of Lagos, Akoka, Yaba, Lagos, Nigeria
The aim of this research was to assess the impact of abattoir effluents on River Illo in Ota, Nigeria. In order to achieve this set objective seven sampling locations were chosen along the river course. The choice of locations was to reflect the variations in concentrations of the following important parameters of water quality issue: pH, conductivity, total dissolved solids, total suspended solids, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia and nitrate among others. The choice of these parameters was based on their relative importance in abattoir effluents composition. Results of analyses revealed impairment in the quality of River Illo by the wash down from the abattoir activities. Dissolved oxygen concentrations ranged between 0.01 and 4.6 mg L-1 while the highest concentrations of TSS and TS of 1026 and 1071.5 mg L-1, respectively were obtained at the point of abattoir effluents discharge. The BOD mean value of 312.9 mg L-1 obtained for the river water is far above the highest permissible value of 30 mg L-1 allowed by the Federal Environmental Protection Agency for discharge into receiving water bodies in Nigeria. The mean value of 783 mg L-1 obtained for the COD of the river body corroborates the pollution of the water body. The current water quality status of River Illo from the discharge of abattoir effluents therefore poses both environmental and health hazards to users. In order to redress this and ensure public health safety, River Illo needs adequate treatment before use.
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