Paving system for removing urban non-point source pollution

Abstract

The invention belongs to the technical field of permeable pavement, and specifically discloses a permeable paving system for removing urban non-point source pollution. The paving system comprises thefollowing structures from top to down: a surface layer, a leveling layer, a decontamination layer, a base layer and a cushion layer, wherein the surface layer is used for rapidly permeating and draining rainwater or accumulated water on a road surface, and is capable of temporarily storing the rainwater which is not discharged by a permeable layer; the leveling layer is a structural layer used forbuffering and permeating and for leveling, reinforcing and strengthening a system structure on the decontamination layer, and has an adsorption effect on pollutants such as nitrogen, phosphorus, heavy metals and the like; the decontamination layer is used for adsorbing pollutants such as heavy metals, nitrogen, phosphorus and the like, and is capable of inhibiting NH3-N nitrification and improving the removal efficiency of N; the base layer is used for adsorbing and removing the pollutants in an infiltration runoff and is capable of permeating and storing water; and the cushion layer is usedfor preventing water or groundwater that penetrates into a roadbed from rising, permeating and storing due to capillary phenomenon. By adopting the paving system provided by the invention, particulatematter in the infiltration runoff can be filtered and purified, the pollutants such as nitrogen, phosphorus, heavy metals and the like in the infiltration runoff can be effectively adsorbed, and thepollutants can be avoided from entering the underground and causing pollution.

Description

technical field [0001] The invention belongs to the field of permeable paving, in particular to a paving system for removing urban non-point source pollution. Background technique [0002] With the rapid development of urbanization in our country, the problem of urban water environment is becoming more and more serious. The sharp increase in the impermeable surface area caused by urban land use has caused a significant increase in urban rainwater runoff. Traditional terminal treatment facilities not only increase the load on pipe networks and sewage treatment plants, but also the urban waterlogging problem caused by overload flow cannot be ignored. . In addition, excessive stormwater runoff into water bodies can cause water hazards. Excessive nutrients will cause algal blooms in water bodies, and pollutants such as metals will harm aquatic organisms. Due to the poor water permeability of hardened pavement, its surface temperature is much higher than that of natural paveme...

AI Technical Summary

Problems solved by technology

[0005] The current permeable pavement system only focuses on the rainwater infiltration function, and does not fully consider the removal of non-point source pollutants, especially the removal of nitrogen, phosphorus and heavy metals in runoff. If nitrogen and phosphorus directly seep into the ground, cause serious environmental pollution

There is no effective solution in the existing technology

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