Assessment of the Status of Industrial Waste Water Effluent for Selected Industries in Addis Ababa, Ethiopia

Abstract

Environmental pollution constitutes a great health hazard to human, animals and plants or abiotic and biotic components with local, regional and global implications. Effluents from industries are normally considered as the main environmental pollutants containing organic and inorganic compounds. The Objective of this assessment is to know the Status of the selected industrial waste water effluent in Addis Ababa city. For this assessment parameters like (pH, temperature, suspended solid (SS), chemical oxygen demand (COD), biological oxygen demand (BOD), , SO₄^2-, total NO₃^-, total PO₄^3-, total  NH₃ , Cd, Cr, Pb, total coliform bacteria) have been determined to assess the pollutant status and pollution levels of the selected industrial waste water effluent. The analyses results of bacteriological and physico-chemical characteristics of selected industrial waste water were evaluated with the acceptable standard limits for surface water. As the result reveals Temperature and acidity were not the problem for effluents discharge, but the COD, BOD, suspended solids, total nitrogen, total phosphorus, total ammonia and heavy metal concentration should be controlled to prevent pollution caused by effluent discharge. Generally, the results indicate the effluent of all selected industry were physically, bacteriological, and chemically polluted the surrounding environment.

Keywords: pollutant, parameters, effluent,