Coagulation of an Oil-Water Emulsion Waste

Abstract

<p>A small scale continuous unit, jar test unit and zeta. meter were used to study the effects of chemical treatment on a stable emulsion waste from a steel rolling mill.</p> <p>The effect of coagulant dosage and pH of coagulation on colloid mobility and on oil removed was studies. All other system variables were kept constant.</p> <p>Of the 15 combinations of chemicals tried, an effective coagulant for breaking a fresh stable emulsion and a corresponding pH range for effective separation was obtained.</p> <p>Colloid mobility measurements indicated the feasibility of using the zeta potential technique in the waste field to determine and control coagulant dosage. However the zeta meter in its present form has limited use with emulsions.</p>