Abstract
Finely dispersed oil was separated from oil-water emulsions in an electroflotation cell equipped with a lead anode and stainless steel screen cathode. The effect of operating parameters such as current, oil concentration, flotation time, and height, on the performance of the electroflotation cell was examined. Oil removal reached 60% at optimum conditions; 70% in the presence of NaCl (3.5% by wt); and 88% in the presence of both NACl and an optimum concentration of a flocculant. Electrical energy consumption varied from 0.46 to 10.63 kWh/m 3 according to experimental conditions. The performance of the oil removal process was also represented as a first order kinetic rate model. The constants obtained fit the experimental data well, with their values varying from 1.305 × 10 −5 to 9.94 × 10 −5 m/s. Good correlation was found for the change in percentage oil removal with a wide range of operating parameters.
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