الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Oily wastewaters are produced in large volumes every day. Oil and grease for example, are common pollutants found in wastes from a vast range of industries such as petroleum refineries, petrochemical, metal manufacture, machining and finishing, food processors, textile and carwash stations. Reclaimed wastewater is an important water resource and is used for many purposes, such as public and domestic water supply system, irrigation, livestock watering, and for industrial purposes. Reclaimed wastewater reuse is still facing some problems; the common problem is the contamination by oil and grease. The O&G in the wastewater aggregate and foul the sewer system and produce an unpleasant odor. Scope and objectives of this study is the evaluation the electrocoagulation to remove emulsified oil and grease from wastewater. the main objective of this study was to Study the effect of numerous operating conditions such as electrode material (iron or aluminum), initial COD concentration, current intensity, NaCL concentration, and contact time on the removal of COD and O&G to identify the optimum operational conditions and low cost. In order to accomplish the aims of this study three phases were planned. The phase one has three groups and each group of them contained three runs with different calculated O&G concentration (400, 550, 700 mg/L.). The first group was conducted with Al electrodes (AL/AL) under the output current conditions of D.C. power supply. The second and third three groups similarly were conducted with (Fe/Fe) and with combination of (Al / Fe) electrodes. The phase two was conducted for samples of calculated COD concentration of 1500 mg/L. and NaCl of concentration of 0.50, 1.00, 1.50 gm/L. with AL electrodes and with D.C. power supply current output of 1.3 A and 11.6V. The last phase was conducted for carwash station samples at different values of current intensity. It was found that increasing current intensity increased COD and O&G removal efficiency for all phases. Initial COD concentration had a little effect on removal efficiencies. The total costs of cubic meter for each gm COD removal after different interval times were calculated, low cost results were at 11.6 volt and 1.3 Ampere, for initial COD concentration of 1500 mg/L., adding 0.5 gm/L. NaCl using aluminum electrodes. Low cost was 0.84 LE/g COD removal/m^3 ,after 15 min with removal efficiency of 95 %. Under previous condition, total cost of treatment of cubic meter for carwash stations equal 0.32 LE/gm COD removal after 7.5 min. with removal efficiency of 72% (final COD 925).