Industrial Wastewater Treatment By Electrocoagulation And Conventional Coagulation

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libro Industrial Wastewater Treatment By Electrocoagulation And Conventional Coagulation

It has been found that in the electrochemical cell, the aluminium added to the electrolyte comes from both chemical (corrosion) and electrochemical dissolution processes. As well, it was observed that the speciation of aluminium in an aqueous solution does not depend directly on the dosing technology, but on the total concentration of aluminium and pH. The studies of electrocoagulation of wastewaters with aluminium electrodes have shown that this process can be successfully applied in the treatment of wastes polluted with kaolin, EBT and O/W emulsions. Regarding the comparison, there are not significant differences between the efficiencies obtained by the conventional and the electrochemical technologies, when the same values of pH and aluminium concentration are attained in the reaction system. Finally, the economical evaluation showed lower operating costs for the electrochemical process for low and intermediate aluminium doses.


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