Treatment method of landfill leachate

The invention discloses a landfill leachate treatment method, which belongs to the technical field of wastewater treatment, and comprises the following steps: 1, adjusting the pH value of landfill leachate MBR effluent to be weakly acidic, sequentially adding a coagulant and a flocculant, stirring and standing, adjusting the pH value to be weakly alkaline, and standing and precipitating to obtain pretreated wastewater; 2, adding sodium alginate into water, stirring and dissolving, adding hydroxyl-terminated hyperbranched modified graphene, stirring and dispersing to obtain a glue solution, dropwise adding a ferrous sulfate solution into the glue solution, mixing, stirring, adding a reducing agent, continuously stirring, dropwise adding into a calcium chloride solution, standing to obtain spherical particles, washing with water, and freeze-drying to obtain a catalyst; and 3, adding a catalyst into the pretreated wastewater, adjusting the pH value to 3-5, adding hydrogen peroxide, carrying out blast stirring, a