Experiments were carried out in a batch reactor to treat the oily effluent by electro-coagulation. The influence of operating parameters such as applied current, type of electrode and electrolysis time on electro-coagulation efficiency has been critically examined. The maximum percentage removal of chemical oxygen demand (COD) was 94% under optimum experimental conditions of pH 6.7, current density 6 mA/cm2, electrolysis time 40 min, and using mild steel as anode. The remaining sludge in the reactor was analyzed by energy disperse analysis of X-rays (EDAX) and scanning electron microscope (SEM) analysis. The analysis confirms that the oily pollutant was removed by electroflotation and adsorption of the oily particles of precipitate during the electro-coagulation process. Electro-coagulation can be used as an efficient treatment technique for oily wastewater.
Electro-coagulation treatment of oily wastewater with sludge analysis
Dhorgham Skban Ibrahim, N. Sakthipriya, N. Balasubramanian; Electro-coagulation treatment of oily wastewater with sludge analysis. Water Sci Technol 1 December 2012; 66 (12): 2533–2538. doi: https://doi.org/10.2166/wst.2012.481
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