الفهرس 
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Abstract
The present study investigate the application of the Induced Air Flotation (LA.F) for removal of a highly stabilized Oil in Water (OIW) emulsion. The study is performed experimentally in a batch column, 10 Cm. in diameter and 150 Cm. in
height.
The study is performed in three phases. During the initial phase, a very strong synthetic emulsion was prepared to be similar to those emulsions that originate from oil & gas production and processing plants. The second phase test results determined parameters that significantly influence oil removal efficiency, during this phase the optimum value for each parameter was determined to get the maximum oil removal efficiency. The obtained results were used at the final phase. to build a mathematical model.
The OIW emulsion was prepared using a very strong emulsifier which gave an emulsion stability over than 160 hours, that’s achieved by subjecting the crude oil and distilled water to a series of mixing processes, including; strong mixing, pump circulation and valve throttling.
The emulsion was prepared with an average oil concentration of about 400 mg/1. and oil droplet mean diameter of about 4.5 JlIl1 in order to match the highly stabilized oily water specifications which resulting from the primary treatment of the oily water.
Flotation is carried out at the optimum condition that obtained to be; 1525 ml/min. of air flow rate, 0.3 mm air bubble diameter, 50 Cm liquid height in the column and sample point position at 5 Cm above the air bubble disperser (sintered glass). These variables can employ to give high percentage oil removal of about 83% of the initial oil concentration.
The experimental results indicated that the mechanism of flotation is not so simple and it may more compounds. A mathematical equation was developed, in very agreement with experiments, to express the relationship between the different