Printing and dyeing wastewater treatment recycling device based on nano-catalysis electrolysis and membrane technology

The utility model discloses a printing and dyeing wastewater treatment recycling device based on nano-catalysis electrolysis and membrane technology, relates to printing and dyeing wastewater treatment, and provides a printing and dyeing wastewater treatment recycling device based on nano-catalysis electrolysis and membrane technology with high CODXr removal rate, little chemical consumption, little produced sludge, thorough treatment and high water recycling rate, and a method thereof. The device is provided with a coarse grid filtering machine, a regulating pool, a hydraulic screen, a desulfurization reaction tank, a nano-catalysis electrolysis machine, a flocculation reaction tank, a sedimentation tank, an air flotation device, a biochemical pond, a secondary sedimentation tank, a secondary nano-catalysis electrolysis machine, a filter, a filter press, a membrane system and a circulation water tank. The method comprises the following detailed steps: desulphurization, nano-catalysis electrolysis, flocculati