Comparative study in using natural and commercial organic coagulants for the treatment of petroleum refining unit waste water

Abstract

An environmental friendly biodegradable cationic rice starch and corncobs polymer was prepared from the broken rice and corncobs. These natural polymers were assessed and applied in the treatment of the oil refinery wastewater where it showed a noticeable improvement in the values of organic matter, turbidity, colloidal silica and chloride ions to lowest levels by applying 10 mg/l of cationic rice starch polymer alone. Also, by using (0.6) mg/l of that polymer together with (25) mg/l of ferric chloride, in the clarification of the wastewater, showed very good clarity. Details, of scenario, methodology, and the obtained results discussed briefly and presented in this study. In addition to the same trend recorded when using aminated corncobs. Also wastewater treatment monitored via analysis of discharge plant streams conditions and understanding operation variables by comparing the natural materials applied in this thesis with some other commercial material that widely used in such treatment processes. Key word: cationic starch, corncobs, flocculants, clarification, commercial flocculants, water treatment.