Treatment method for reactive dye printing and dyeing wastewater

The invention discloses a treatment method for reactive dye printing and dyeing wastewater. The method includes the steps of: firstly discharging printing and dyeing wastewater into a heat preservation precipitator in order, and adjusting the pH to 8-11; then adding a coagulant, discharging the supernatant obtained by coagulation sedimentation and the filter pressed wastewater of precipitate intoa heating and heat preservation reactor lined with a porous ceramic carrier, the surface of which is immobilized with a catalyst, and adjusting the pH of the wastewater to 5.5-6.5; then adding an oxidant, heating the wastewater to 80-95DEG C, and carrying out reaction to a COD of less than 80mg/L. The method firstly uses alkaline coagulation sedimentation technique to substantially remove easily precipitated slurry and macromolecular assistants from the wastewater, and then employs catalytic oxidation technique to remove difficultly precipitated components (including reactive dyes), lowers thecost and improves the oxi