METHOD FOR TREATING METHIONINE PRODUCTION WASTE WATER

摘要

The present invention relates to a method for treating methionine production waste water, comprising the following steps: 1) using an extraction agent to extract the waste water, and performing separation to obtain a first organic phase and a first water phase; 2) rectifying the first organic phase to obtain acrylic acid from a side line of a stripping section, obtain heavy components from the bottom of the column, and obtain the extraction agent containing light components from the top of the column; 3) treating the extraction agent containing the light components with a light component removal column, and performing separation to obtain the light components and the extraction agent; 4) removing formaldehyde in the first water phase; and 5) performing biochemical treatment to the first water phase. By using the method of the present invention to treat the methionine production waste water, compared with the prior art, the energy consumption is remarkably reduced and the substance utilization ratio is improved.