High-load capillary infiltration trench system for treating domestic wastewater

The invention discloses a capillary infiltration ditch system for treating the domestic sewage, consisting of a surface soil layer, a sand-soil layer, an artificial soil layer and a water-guiding layer from the top to bottom in sequence; wherein, plants are planted on the surface soil layer, wherein, the soil layer of the surface is planted with the plants; in the surface soil layer and the artificial soil layer, a surface water distribution pipe and an inner water distribution pipe are respectively provided with surface cloth tube and deep cloth tube communicated with a hydrolysis acidification unit or a septic tank; the periphery of the water distribution pipe is the green pebble encapsulated with an earthwork cloth; the water-guiding layer is provided with a water-discharging pipe communicated with the water-discharging pool and an air-drawing duct for naturally forcing the ventilation with an air-drawing principle. With higher water-force load, the invention has a higher removal efficiency of the COD, BOD5, total phosphorus, NH4 -N, TN in the domestic sewage. The effluent achieves the national sewage comprehensive discharge standard. The invention has the advantages of low cost in the basic construction and an operation management, small impact by the environment, no public health problems as well as vegetables and economic plants- planting. The invention is particularly applied to treat the distribution sewage with a high cost pipe building and a high requirement of the nitrogen and phosphorus removal.