Treatment process for acrylic fiber waste water

The invention discloses a treatment process for acrylic fiber waste water. The acrylic fiber waste water is pretreated and then is subjected to first-set electrodialysis separation to obtain organic waste water with low salt content and high-salinity concentrated water containing organic matters with low concentration; the organic waste water with the low salt content is subjected to advanced oxidation treatment to improve the biodegradability, and then is subjected to A/O biological treatment to reach the standard; the high-salinity concentrated water containing the organic matters with the low concentration is subjected to reverse osmosis desalination to obtain purified water and reverse osmosis concentrated water; the purified water is used for production; the reverse osmosis concentrated water is subjected to second-set electrodialysis concentration to produce water. According to the process method provided by the invention, on the basis of an advanced oxidation technology and a biological treatment technology, the degradation of refractory organics and macromolecule organic matters which are difficult to naturally settle is realized relatively fully and effectively by comprehensively utilizing a membrane separation technology; the degraded waste water is recycled; the obtained purified water can be used for production, so the resourceful treatment is really realized.