SEPARATION OF OIL FROM O/W EMULSION BYELECTROFLOTATION TECHNIQUE
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Abstract
Dilute emulsified oil in water (50-500 ppm) was removed by electrocoagulatin and
electroflotation process. Effects of various parameters such as current density, initial pH, sodium
chloride concentration, different electrodes material, gap, temperature, electrodes surface area, and
treatment time on the removal efficiency were studied in batch and continuous mode.It was found
that the higher removal efficiency (99%) achieved at pH of 7.5 for Al/Al electrodes while for iron
electrodes at pH 8 in the batch mode.
The removal efficiency increased and the treatment time decreased with increasing the current
density and decreasing the gap distance between electrodes.
The removal efficiency was (99%) at 10 min for Al/Al electrodes, (98.6%) at 12 min for Al/St.St.
electrodes, and (97.4%) at 12 min for Fe/St.St. electrodes.
The present results showed that the best temperature was 60ºC .The best concentration of sodium
chloride was found to be (400 ppm) when the oil concentration was (500 ppm). Also it was found
that a vertical Al/Al electrode was the best type with an electrical energy consuming (3.36
kWh/m3).
In the continuous experiments, the removal efficiency enhanced with increasing flow rate. A
multiple linear regression model was used in order to relate experimental data to a statistical model
with a correlation coefficient of (0.909) and variance (0.827)
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