Treatment method of membrane filtration concentrated solution

The invention relates to a treatment method of a membrane filtration concentrated solution. The method comprises the steps of: permitting the raw water of the membrane filtration concentrated solution enter the reaction container, adding H2O2 and Fe in 1-8 times, with the pH value controlled between 2.0 and 4.0; subjecting the mixed solution to an incomplete Fenton oxidation reaction for 30-360min; adjusting the pH value to a range of 4.0-6.0, stirring for 10-60min for flocculation; adjusting the pH value to a range of 6.0-9.0, leaving the mixed solution to stand and precipitate for 15-45min; putting the supernate into a biochemical treatment unit, and allowing the settled sludge to enter a sludge treatment system. The total adding amount of the Fenton reagent is determined according to the H2O2/COD mass ratio of 0.5-4.5 and the Fe/COD mass ratio of 0.1-4.5. The medicine is added at an interval of 10-150min, and each time the mass added is about 33-100% of the the last time. The method of the inventio