Patent ID: 9540268
Date: 2017-01-10
CPC Classifications: C02F,Y02W

Claim:
1. A method for treating a highly concentrated resin-desorption liquid generated from a wastewater deep purification biochemical system, comprising: a) channeling the highly concentrated resin-desorption liquid generated from an anion exchange resin treatment of wastewater through a nanofiltration membrane and separating the highly concentrated resin-desorption liquid into a highly concentrated nanofiltration retentate and a nanofiltration permeate, wherein the nanofiltration permeate is reused as an desorption agent after oxidation; b) inducing a first coagulation-precipitation process by adding a coagulating agent to the highly concentrated nanofiltration retentate obtained in step a); c) subjecting a supernatant formed after the first coagulation-precipitation process to 1-5 hours of Fenton oxidation or ozone oxidation to obtain a solution; d) inducing a second coagulation-precipitation process by adding an alkali solution to the solution obtained in step c) for adjusting its pH value at 8.5-10.5; e) channeling a liquid obtained after the second coagulation-precipitation process of step d) to an activated sludge for further biodegradation; and f) channeling a liquid resulting from further biodegradation of the liquid obtained after the second coagulation-precipitation process of step d) with the activated sludge back to the wastewater deep purification biochemical system for further use in biodegradation, wherein the wastewater deep purification biochemical system uses an anion exchange resin.