Harmless treatment system for high-ammonia-nitrogen landfill leachate

The harmless treatment system comprises a pretreatment device, a deamination device, a coagulation treatment device, a central sedimentation tank, a three-dimensional electro-catalysis device, a biochemical treatment device, a biochemical sedimentation tank and a clean water tank which are connected in sequence, the pretreatment device, the coagulation treatment device, the three-dimensional electro-catalysis device and the biochemical sedimentation tank are respectively provided with a sludge discharge port, and the sludge discharge ports are connected with a sludge tank; the pretreatment device and the coagulation treatment device are respectively provided with a dosing port; and the deamination device is provided with a gas collection unit. According to the utility model, stable water quality is provided for biochemical treatment through pretreatment, deamination treatment, coagulation and electro-catalysis treatment, biochemical effluent is ensured to be discharged up to the standard, any membrane treatme