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Review and complementary laboratory investigations on Electrocoagulation for the treatment of Produced Water
Art der Abschlussarbeit
Bachelor
Autoren
- Hamester, Meike
Betreuer
- Prof. Dr. André Lerch
- Chem. Eng. Flávia de Farias Lima
Abstract
The demand of oil and gas on the global market is steadily increasing [2]. Consequently, the production volumes keep on rising as well. As a result, the amount of generated waste water is incrementing, which makes the development of high efficient treatment technology indispensable, since the performance of conventional treatment technology does not comply with current ecological standards anymore. Especially suspended oil droplets that are present in the said waste volumes, are not easily removable due to their small size. Electrocoagulation treatment enhances the separation of oil and water by influencing the surface charges of the contaminant, so that they may agglomerate and form bigger, removable flocs. The results of the laboratory investigation on the performance of Electrocoagulation using an electrolytic cell in continuous flow were evaluated. Different current densities and residence times were applied on an oil in water emulsion, containing 450 mg/l of raw oil, different concentrations of sodium chloride and in some cases carbonate or bicarbonate. The treatment reached TOC concentrations of 0,15-29,7 mg/l in the effluent. The applied charge per volume proved to be the most influential parameter. Depending on the degree of electrode dissolution the generated sludge volume ranged from 2-37,5 % in case the flotation worked. An important observation that was made during this investigation involved a high measurement error that occurred due to the fragile flotation of the flocs and the hydrophobic character of oil.
Schlagwörter
Electrocoagulation, Produced Water, Oil in water emulsion, sludge production during EC, Aluminium electrodes, sodium chloride in EC
Berichtsjahr
2016