Treatment method for industrial waste water of methionine

The invention relates to a treatment method for industrial waste water of methionine. The treatment method comprises the following steps that 1, an extraction agent is used for extracting the waste water, and a first organic phase and a first water phase are obtained after separation; 2, the first organic phase is rectified, acrylic acid is drawn from a side line of a stripping section, heavy components are obtained from a tower bottom, and an extraction agent containing light components is obtained from the tower top; 3, a light component removing tower is used for treating the extraction agent containing the light components, and separation is carried out to obtain the light components and the extraction agent; 4, formaldehyde of the first water phase is removed; 5, the first water phase is treated in a biochemical mode. When the method is utilized for treating the industrial waste water of methionine, energy consumption is remarkably reduced compared with that of the prior art, and the substance utilization rate is increased.