The two-stage DTRO landfill leachate treatment process is mainly based on the following points from the comprehensive investigation of occupation area, civil construction investment, maintenance management, operation cost and system stability.

(1) The two-stage DTRO can operate stably and discharge up to the standard, which is suitable for the leachate treatment in the whole life cycle of the landfill;

(2) Make full use of landfill resources, use landfill as the final pollutant consumption site, save construction investment and land cover, and avoid pollution diffusion;

(3) The two-stage DTRO is easy to operate and maintain, and the maintenance operation is standardized, which is convenient for the management of maintenance personnel, reduces the demand of operation personnel and saves labor costs;