Green belt drainage channel artificial wetland device for treating rainfall runoff pollution of road

Abstract

The invention discloses a green belt drainage channel artificial wetland device for treating rainfall runoff pollution of a road. The device comprises a tank body, a packing layer and a wetland plant which is planted on the surface layer of the packing layer, wherein a water collection tank is formed at the bottom of the tank body; the packing layer is arranged on the upper part of the water collection tank in the tank body; the water collection tank and the packing layer are partitioned from each other through a perforated filter board; a gravel layer, a sandy soil layer, a blast furnace slag and lime stone mixing layer, a fine stone layer and a rubble layer are arranged on the packing layer sequentially from top to bottom; a perforated water distribution pipe is arranged on the surface layer of the packing layer; and a filter screen is arranged at a water inlet of the perforated water distribution pipe. The wetland device has multiple functions such as a screen belt landscape function, a grass planting drainage channel drainage and decontamination function, a vertical downstream wetland treating function, a stored water and rain water recycling function and the like; and a wetland tank body is used as a green belt tank body and a drainage channel tank body simultaneously, so that the device saves the floor area of an individual building, reduces construction working amount and has lower economic input.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a green belt drainage ditch artificial wetland device for treating road rainfall runoff pollution. Background technique [0002] In recent years, highways, as a key infrastructure in the national development strategy, have developed rapidly. By the end of 2009, the total mileage of national highways had reached 3.86 million kilometers, ranking second in the world. It has become one of the important issues in the prevention and control of environmental pollution in our country. Highway rainfall runoff refers to the rain (snow) water overflowing on the surface of the road, which can dissolve, wash and transport a large amount of organic and inorganic pollutants accumulated on the surface of the road. It varies with changing conditions and is considered to be an important source of non-point source pollution. Highway run-off pollutants mainly include heavy met...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of existing artificial wetland treatment technologies such as large area occupied by wetland beds, high economic investment, low hydraulic load and pollution load, single substrate, few plant species, and road rainfall runoff pollution characteristics. Insufficienc

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