The reverse osmosis treatment system and one kind of cold brine treatment method of

The present invention provides a reverse osmosis cold brine processing system and processing method, the order processing system comprising: a plate heat exchanger, a lift pump, nanoscale zero valent iron slag reactor, two lift pump, PH exposure reducing gas tank, three lift pump, integrated denitrification biochemical pool COD removal, coagulation sedimentation tank. After cold RO brine into the plate heat exchanger to cool nanoscale zero valent iron slag heavy metal removal in the reactor, and then integrated into the cell redox regulation denitrifying biochemical pool COD removal and total nitrogen removal organics PH aeration, and finally into the mixing coagulation sedimentation, coagulation precipitation after cold RO brine meeting the emission standard. The processing system, low one-time investment, operation is simple, low cost production process is environmentally friendly green steel waste water treatment.