OILY WASTEWATER TREATMENT FOR CATALYTIC OXIDATION WITH K-MnO2/CeO2

Abstract

The search for alternatives for the treatment of industrial effluents, especially high toxicity is one of the main difficulties of the industrial treatment systems. This work aims to use potassium as a promoter of electrons for the oxidation to the catalyst by impregnating it MnO2/CeO2 to degrade the effluent coming from the processing of cashew nuts in the presence of oxygen. The experiments were performed in a slurry bed reactor. In the experiments were kept constant initial concentration in the effluent LCC (0.8 g/L), a major contaminant in the effluent of industrial activity, the stirring speed (900 rpm) and potassium impregnated percentage (1%). The operational parameters were: mass concentration of the catalyst (4.0 and 5.0 g/L), full system pressure (300 to 900 psi) and temperature (80-130°C). The tests showed that the composite K-MnO2/CeO2 demonstrates good activity as a catalyst in the process of wet oxidation of the effluent, reach levels above 90% removal. The best operating conditions found to perform the catalytic reaction of degradation of the effluent were: catalyst concentration of 5.0 g / L and 130ºC, having a pronounced effect on the pressure.