Abstract:prises, high temperature and high pressure reaction kettle was used to treat DMF distillation residuewith the supercritical water oxidation technology and subcritical water oxidation technology, and the ox⁃idized effluent was treated by MBBR process. The results show that optimizing temperature, reactiontime and peroxide coefficient can significantly improve the degradation rate of residual, and the trend isfast firstly and then slow. The effect of solid-liquid ratio on the degradation rate is relatively small, andthey are negatively correlated. The optimal conditions are at 400 ℃ for 10 min with a solid-liquid ratioof 1 ∶ 14 and peroxide coefficient of 175%. The degradation rates of TOC and COD in liquid productsare 98.7% and 99.5%. Moving bed biofilm reactor (MBBR) process has obvious removal effects onCOD, TN, NH+4-N and TP, with highest removal rates of 71.3%,92.9%,99.5% and 55.6%, respec⁃tively. Close-