الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Electrocoagulation (EC) is an electrochemical wastewater treatment technology. In EC, the active coagulant is produced in situ by electrolytic oxidation of appropriate anode material usually aluminum or iron cations into the solution, which means that there is no need to add chemical coagulant inside the solution. Accompanying electrolytic reactions evolve gas (usually hydrogen bubbles) at the cathode that enhances the flotation The present work shows the possibility of using electrocoagulation process to separate oil from refinery waste water using a cell with new anode geometry. The anode and cathode used are made from vertical screen cylinder Aluminum with separation space 2.1 cm. The removal of oil from oil-in-water (O/W) emulsion was investigated through various operating parameters in batch reactor such as current density, pH, beginning oil concentration, diverse concentration of NaCl, distance between electrodes and mesh number of electrodes. The chemical oxygen Demand (COD) was also measured. To appear the economics of this process, Al. consumption and energy consumption of this process were calculated under various conditions. The optimum conditions which achieved (100% removal of oil) after 50 min at current density = 0.192 mA /cm2,pH=7, NaCl concentration =1g/l, initial oil concentration =500 ppm, distance between electrodes=2.1 cm and mesh number of wire=8. The new design of anode gives high efficiency with lower energy consumption than other designs of the cell in previous studies.