ELECTROCOAGULATION TREATMENT OF ABATTOIRWASTEWATER USING ALUMINIUM ELECTRODE PAIRS
This work investigated the effectiveness of Electrocoagulation (EC) technique in Abattoir Wastewater (AWW) treatment using aluminum electrode pairs.The effluent was characterized before and after treatment and the performance of the treatment process was assessed by the percentage removal of turbidity of the effluent. The experimental data were used to carry out the reaction kinetics studies. The modeling and optimization of the process weredone using the Central Composite Design (CCD) of the Response Surface Methodology (RSM). The results of the experiments showed that the removal efficiency of turbidity fromabattoir wastewater increases with a decrease in pH and an increase in current intensity, electrolysis time, settling time and temperature. The reaction kinetics study showed that there is a good a correlation between the experimental data and a pseudo-second-order kinetic model with R2 values greater 0.9700. The result of the modeling process showed that a quadratic model fitted the experimental data appropriately with a correlation coefficient (R2) of 0.9975. The optimum conditions were initial pH of 2; thecurrent intensity of 1.9A; electrolysis time of 20 minutes; settling time of 50 minutes and operating temperature of 40oC at an optimal turbidity removal of 96.78% and 0.28kWh/L energy consumption. The results showed that EC technique using aluminum electrode pairs is suitable for turbidity removal from abattoir wastewater.