Printing and dyeing wastewater deep recycling treatment system

The invention discloses a printing and dyeing wastewater deep recycling treatment system. The system comprises a UF ultrafiltration device, an ozone reactor, an ozone generator, a reverse osmosis device, a water production tank, a built-in MBR device and a discharge water tank. Effluent of a printing and dyeing wastewater biochemical system enters the UF ultrafiltration device; the water outlet ofthe UF ultrafiltration device is connected with the water inlet of the ozone reactor; the water outlet of the ozone reactor is connected with the water inlet of the reverse osmosis device, a producedwater outlet filtered by the reverse osmosis device is connected with the produced water tank, a concentrated water outlet of the reverse osmosis device is connected with the water inlet of the built-in MBR device, and the water outlet of the built-in MBR device is connected with the discharge water tank. The ozone generator is respectively connected with the UF ultrafiltration device, the ozonereactor and the built-in MB