Method for treating high-concentration organic wastewater by multi-stage oxidation method

The invention discloses a method for treating high-concentration organic wastewater by a multi-stage oxidation process, which comprises the steps of primary oxidation, secondary oxidation, ultrafiltration and reverse osmosis, in the primary oxidation, a homogeneous catalyst and a heterogeneous catalyst act synergistically, the temperature and pressure required by reaction are reduced, compared with the traditional wet oxidation technology, the conditions are milder, and the efficiency is higher. Therefore, the energy consumption and the equipment investment cost are reduced; in the secondary oxidation process, peroxymonosulfate is activated in two modes of binary metal ions and heat, so that the activation efficiency is greatly improved, the medicament failure is avoided, and the operation cost is saved. Multi-stage oxidation is adopted, the advantages of each stage of oxidation can be exerted to the maximum extent, the oxidation efficiency is greatly improved, an excellent treatment effect on high-concentrat