Browsing by Author "Soresa, Mekibib"

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    Ayka Addis Textile Wastewater Treatment by the Fenton’s Reagent
    (Addis Ababa University, 2011-06) Soresa, Mekibib; Worku, Teshome (Eng)
    Treatment of wastewater is one of the biggest challenges faced by textile manufacturers. One of the textile industries in Addis Ababa at Alem Gena, Ayka addis textile and investment group plc, is experiencing high concentration of COD and color in the final effluent, due to the absence of appropriate treatment facility, as a result of this the effluent wastewater exceeds the standard discharge limits. The use of conventional textile wastewater treatment processes becomes drastically challenged to environmental engineers with increasing more and more restrictive effluent quality by water authorities. Conventional treatment such as biological treatment discharges will no longer be tolerated as 53 % of 87 colors are identified as non-biodegradable. The purpose of this study was to investigate the suitability of using Fenton’s reagent for treatment of Ayka Addis textile effluent wastewater and reduction of COD and color from the wastewater. The oxidation experiments was carried out using Fenton’s reagent (hydrogen peroxide (H2O2) and ferrous sulphate (FeSO4.7H2O)), and to adjust the pH of the wastewater sample hydrochloric acid (HCl) and sodium hydroxide (NaOH) were used. In this work, optimum conditions such pH, reaction time and stirrer speed on COD and color removal efficiency were examined and after determination of the appropriate experimental conditions, the optimum dosages of Fenton’s reagent were determined, at the optimal treatment conditions and dosages a satisfactory results were obtained. It is found that the tested Ayka Addis textile wastewater revealed high susceptibility to treatment using a combined action of ferrous salts and hydrogen peroxide. The main characters of the wastewater, such as color and chemical oxygen demand (COD) were reduced by considerable amount. The result of this investigation shows a marked increase in degradation of pollutants by Fenton’s reagent oxidation. Keywords: Fenton’s reagent, textile wastewater treatment, advanced oxidation process