A COMPARATIVE-STUDY OF WASTE-WATER TREATMENT BY CHEMICAL WET OXIDATION

A leachate from a municipal landfill and an industrial wastewater from an emulsion-breaking unit have been treated by chemical wet oxidation using ozone and hydrogen peroxide as oxidants. The best results were obtained with UV radiation resulting in the formation of OH. radicals. If ozone is used, mass transfer will be the limiting step in the degr adation reactions. The specific consumption of hydrogen peroxide is dr astically reduced if pure oxygen or air is dispersed into the wastewat er. Under optimum conditions, the COD of the leachate and of the indus trial wastewater could be reduced by 90% in c. 3 and 5 h, respectively .