Treatment of wastewater from vitamin C production with reinforcement, catalysis and ozonization of physical means

The invention discloses a physical method for treating vitamin C production wastewater by strengthening and catalyzing ozonization. Ultrasonic radiation, ultraviolet irradiation and hydrodynamic cavitation methods are adopted to be combined with a chemical method for heterogeneously catalyzing the oxidation of ozone respectively to ensure that organic matters in vitamin C wastewater are oxidized and degraded into CO2, and the generated CO2 makes Ca ions in the wastewater precipitated. Compared with single heterogeneous catalysis to the oxidation of the ozone, the utilization rate of the ozone of the method is improved by 1.3 to 4 times, and oxygen consumption and operating cost are remarkably reduced; the COD value of output water can be less than 80mg/L, the decolorization ratio reaches 100 percent, the output water has no peculiar smell, the total hardness removal rate is more than 90 percent, and the removal rate of the organic matters is more than 95 percent; and the method has no secondary pollution, and the treated VC wastewater can reach the national grade one discharge standard or is used as process water for recycling.