▎ 摘　　要

NOVELTY - Ultrasonic synergistic zinc oxide/graphene photocatalysis combined pretreatment of aged landfill leachate, comprises taking treatment leachate, adjusting the pH to alkaline into the reactor, adding zinc oxide/graphene composite material, stir to mix well, ultrasonic treatment at the same time aeration, reaction for 10-30 minutes, close ultrasonic equipment and aeration equipment, and opening the high pressure mercury lamp irradiation 1.5-3 hours. USE - The method is useful in ultrasonic synergistic zinc oxide/graphene photocatalysis combined pretreatment of aged landfill leachate (claimed). ADVANTAGE - The method has removal rate of COD increased by 37% ammonia-nitrogen ultrasonic oxidation removal rate increased by 40% to 42%. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device utilized in the above mentioned method.