The effect of two different metallic anodes on the electrocoagulation of synthetic oily wastewater
DOI:
https://doi.org/10.4013/4616Abstract
In the present work, electrocoagulation process (EC) aluminum and iron were comparing as materials for anode and stainless steel as cathode, under different operational parameters, such as: initial concentration of oil, area-volume relation (SA/V), pH, electrodes geometry, current density and sludge production. Chemical oxygen demand (COD) and turbidity removals were selected as performance criteria. The current density, SA/V and electrode geometry were found to be the most significant parameters. The results have shown that electrocoagulation, using both kind of anodes materials (Fe/Al), successfully removes the COD and turbidity in experimental conditions such as: the current density, 9.4 mA/cm2, distance between electrodes, 10 mm; SA/V, 30.35 m2/m3 and 30 minutes of operation. Removal efficiencies over 99% and 98% were measured for COD and turbidity, using anodes of aluminum. Likewise 94.8% of COD and 98.5% of turbidity were removed from synthetic wastewater, using anode of iron. The sludge produced after electrocoagulation treatment was 2.2 kg/m3 for aluminum and 2.76 kg/m3 for iron.
Key words: electrocoagulation, emulsions, wastewaters.Downloads
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