Method and system for treating polyvinylpyrrolidone wastewater

The invention provides a polyvinylpyrrolidone wastewater treatment method which comprises the following steps: S1, preliminarily filtering wastewater containing polyvinylpyrrolidone to obtain a coarse filtration solution; s2, the coarse filtrate is concentrated and filtered through a molecular sieve membrane system, and pretreatment liquid meeting the biochemical treatment standard is obtained after multiple times of circulation; and S3, carrying out biochemical treatment on the pretreatment liquid to obtain a recyclable treatment liquid. The invention also provides a polyvinylpyrrolidone wastewater treatment system, which adopts the method for wastewater treatment, and comprises a wastewater pool, a filtering device, a molecular sieve concentration device and a post-treatment pool which are sequentially arranged along the liquid flowing direction and are communicated with one another. According to the method, more than 99% of polyvinylpyrrolidone can be removed, so that the solution can conform to the subseq