Preparation Of Ozone Catalytic Oxidation Catalyst

In recent years, with rapid development of our industry, the water resources and the environment has go through a great damage in the current grim situation, how to protect our water resources and to avoid the destruction of industrial waste water has become our important task.At present, the sewage in most of the factories should be toxic and harmful and the organic is not easy to be degraded. In order to settle this problem, we usually carried out biochemical treatment, membrane treatment, or Fenton oxidation. But biochemical treatment usually does not meet the discharge standards, also it can not meet the standard of waste water reuse; The costs of membrane treatment are higher, and Fenton oxidation will produce additional sludge, no doubt, the sludge is also the environment pollution.In order to solve the low efficiency of traditional sewage technology and the cost of sewage treatment is too high, we adopts advanced oxidation technology in this issue, that is, multi-phase ozone catalytic oxidation technology, using rare earth element(cerium) and transition element(manganese) as active component, aluminum oxide as a carrier,using the method of impregnation to prepare a single active component and composite active component metal catalyst. Considering the effects of the preparation conditions, include the concentration of the impregnated solution, the ratio of the loading in the double active components, the immersion time, the immersion method, the calcination temperature and time on catalyst activity. We use SEM and XPS for test.We set test in Shandong Pharmaceutical Factory, Hebei Coal Comprehensive Utilization Co., Ltd, Heze Sewage Treatment Plant and Yuncheng Chemical Wastewater Treatment Plant, using gas-liquid-solid ozone catalytic oxidation technology to deal with the sewage that is after biochemical treatment. The dosage of ozone and the residence time of the wastewater in the reactor are optimized to meet the criteria of the effluent or the reuse of the treated wastewater. The stability and service life of the catalyst are investigated and the economic cost is calculated.Ozone oxidation is a advanced oxidation technology, not only can meet the factory sewage standards, but does not produce secondary pollution, and the cost of new type technology has a great advantage, also have a good industrial prospects.