REMOVAL OF COD AND TURBIDITY OF WASTE STABILIZATION POND ELECTROCOAGULATION/FLOCULATION

Abstract

The paper investigated the application of electrocoagulation/electroflotation with two sets of electrodes, carbon steel and aluminum, in the treatment of the effluent from the stabilization pond wastewater treatment Set New Metropolis, located in Caucaia, Ceará station. Studies applying the technique of electrocoagulation/electroflotation for wastewater treatment are made, mostly at the level of Countertop. In order to assess the technical and economic feasibility of implementing the electrolytic polishing of wastewater stabilization ponds, tests were carried out in electrolytic cells operating 4L batch, varying some settings, such as pH , mechanical agitation and electrolyte concentration . Based on the removal efficiency of turbidity and COD were determined optimal settings for electrodes of aluminum and carbon steel. It was noted that the optimal settings for aluminum electrodes were pH = 8.95, 0.078 = rpm mechanical agitation and electrolyte concentration = 0.8405 mg / l of NaCl and HDT = 20 min, while for carbon steel electrodes were pH = 8.12, mechanical stirring = 193.04 rpm and electrolyte concentration = 0.4865 mg / L NaCl and HRT = 10 min. In both conditions effluent to values lower than 50 NTU turbidity of less than 50 mg / L, COD pH of 9 was obtained.

Keywords: Electrocoagulation, wastewater, wastewater treatment, stabilization pond.