KINETIC AND PERFORMANCE-CHARACTERISTICS OF WET AIR OXIDATION OF HIGH-CONCENTRATION WASTE-WATER

Treatment of high-concentration wastewater from a chemical company by wet air oxidation (WAO) is studied. Experiments were conducted to inve stigate the effects of the operating pressure and temperature on the c hemical oxygen demand (COD) removal. Both air and oxygen were employed as the oxygen supply for the WAO treatment process. Catalytic effects of copper sulfate, cobalt oxide, and zinc oxide on the WAO efficiency were also examined. It was found that over 50% of COD removal can be easily realized in an hour of WAO oxidation. Two kinetic models (first -order and generalized) were employed to represent the experimental da ta, and their fit to those experimental data was compared. The rate co efficients and the kinetic parameters of the two models were determine d also.