Effect of Initial PH And Applied Current Density On Removal Efficiency of Cod of Coking Wastewater From Gasifier Plants

The production of a coal gas through a gasification process produces a large volume of waste water that contains high amount of Chemical Oxygen Demand (COD), Total Suspended Solids (TSS) and Total Dissolve Solids (TDS), Phenol, and Oil and Grease (O&G) contents. This study comprises a possibility of Electro-Coagulation (EC) process to treat coking waste water. The effect of initial pH of waste water and applied current density on EC process for the removal of COD were investigated using one factor at a time method. A quadratic regression models with estimated coefficients were developed to describe the pollutant removal. The experimental results shows that EC could effectively reduce COD by 85 %, at optimum condition of pH 7.01, and applied current density 30 mA/cm^2. The experimental observations were in reasonable agreement with the modelled and previously done work