| abstract |
The utility model relates to a compound ecological ditch for treating surface source sewage in a village. The compound ecological ditch for treating the surface source sewage in the village comprises a grid, a sedimentation adjusting tank, a unit ecological ditch, a plant fence and a recycling device, wherein the unit ecological ditch comprises an ecological ditch unit (1) and a wet land ditch unit (2) which are alternately arranged, an interception water fall dam (3) is respectively arranged at each of the water outlets of the ecological ditch unit (1) and the wet land ditch unit (2), a triangular overflow weir is arranged at the upper end of each interception water fall dam (3), a water outlet is formed in the lower end of the interception water fall dam, and a water control valve (7) is arranged at the lower end of the interception water fall dam. The compound ecological ditch for treating the surface source sewage in the village has the advantages that an underflow type wet land ditch unit, a nitrogen and phosphorus interception box, the water fall overflow weirs, the plant fence and the like are introduced to form a compound ecological ditch system, the defects in the prior art are overcome, COD (chemical oxygen demand) can be stably reduced, removal rate of nitrogen and phosphorous pollutants is increased, and secondary pollution is prevented. |