A comprehensive purification device for road surface runoff

Abstract

The invention discloses a comprehensive purifying device for road runoff. The comprehensive purifying device comprises a road runoff collecting device and a constructed wetland structure, wherein the road runoff collecting device comprises an ecological side drain for collecting the road runoff; the upper side of the ecological side drain is a water inlet; a water collecting system is arranged at the bottom of the ecological side drain; the constructed wetland structure comprises a subsurface flow wetland and a surface flow wetland; the road runoff collecting device is connected with a runoff flow inlet of the subsurface flow wetland through a draining pipe in the water collecting system; the subsurface flow wetland and the surface flow wetland are connected by a water tank; a runoff flow outlet of the surface flow wetland is connected with a drainage ditch. According to the comprehensive purifying device disclosed by the invention, large-sized pollutants and small-sized pollutants in runoff are effectively separated, and the treatment effect at the later stage of road runoff can be improved; even if the pollutants are directly discharged, the pollution to a water body is avoided; finally, the influence of the runoff pollutants on the water quality of a natural water body is reduced, a water body environment is effectively protected and water resources are saved.

Description

technical field [0001] The invention relates to the fields of highway traffic engineering and environmental pollution control, in particular to a comprehensive purification device for road surface runoff. Background technique [0002] my country is a big country that lacks water resources and is also a big country with extremely serious water pollution. With the development of expressways, it has brought great pressure to the environment around the highway while the development of expressways has brought convenience to people. Highway construction and the environment The contradiction between protection is becoming more and more acute. Numerous studies at home and abroad have shown that during the operation of the expressway, many pollutants will remain on the road surface, such as S, COD, heavy metals, P, N nutrient chlorides, grease, and PAHs, etc. The surrounding water body or soil is polluted, which eventually leads to the continuous deterioration of the environment. At...

AI Technical Summary

Problems solved by technology

At the same time, in the construction of highways, it is inevitable to pass through some important water source protection areas, rivers, lakes, etc. When crossing these water-sensitive areas, if the road surface runoff is not treated and discharged directly, it will cause serious consequences to the surrounding environment

[0003] At present, most areas in my country do not treat road surface runoff or simply treat it. While causing damage to the surrounding environment, the problem of recycling water resources is ignored. The purified runoff can be discharged into the natural environment. Not all water bodies or recharged fields are drained through sewers

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