الفهرس 
Chapter One: IntroductionOnly 14 pages are availabe for public view
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Abstract
Lube oil centers produce a huge quantity of oily wastewaters in Egypt. Compressed natural gas lubricant (CNG) and its stations are the main source of polluted oily wastewater. A huge quantity of oily wastewater formed during the change of the engine lubricant. The treatment of such oily wastewater that contains CNG lubricant by EC with a novel electrode is investigated. The finely dispersed oil removal from oil/water emulsions by EC using electrolytic cell. Electrocoagulation (EG) is effective in breaking oily water emulsions. New anode design in the EG of oily wastewater lube oil emulsion is investigated. In this study, EG using aluminum sacrificial anode was used for the treating of oily emulsion. Two anode design are used for this purpose. First anode is a multi-layers 5 discs rotating Al disc with 7 cm in diameter and each layer is 0.5 cm apart is designed to be used as an anode. Second anode is
single-disc rotating Al disc with 7 cm in diameter.
Variables considered were the disc anode rotational speed (from 250 to 1000 rpm), NaCl amount as electrolyte dose (1, 3, 5, 7, 9g/3litre), pH (ranged from 3 to11), oil emulsion concentration (250 to 1000 ppm). The results obtained are that the percent of oil removal decreased by the increase of rotating speed (> 750 rpm) and NaCl dose (1g/3lit.) while it increases by the increase in pH of the emulsion (>3). The maximum percent removal (87.45 %) is obtained at pH=7, initial oil concentration=1000 ppm, sodium chloride dose=1g/3l and rpm =750 for a single disc anode. A comparison of the obtained results with another values of anodes of different shape is held. Best results are also obtained with pH near 9.