Device and method for treating aged landfill leachate

The invention belongs to the technical field of garbage treatment, and particularly relates to an aged garbage leachate treatment device and method.The aged garbage leachate treatment device comprises a separating and filtering device, an eduction pipe, a mixing barrel and an oxidation strengthening treatment device.The separating and filtering device comprises a middle barrel and transition barrels arranged on the outer wall of the middle barrel in an annular array mode; a nanofiltration membrane for separating ammonia nitrogen-containing filtrate is mounted between the middle cylinder and the transition cylinder in an embedded manner; one end of the bottom ring pipe is connected with a liquid separation pipe connected with an inlet of an anaerobic ammonia oxidation treatment device; the output end of the anaerobic ammonia oxidation treatment device is connected with a leading-out pipe used for leading filtrate subjected to anaerobic ammonia oxidation treatment into the mixing barrel, and one side of the bot