A rainwater bioretention pond for phosphorus removal beside a highway

Abstract

The invention relates to a rainwater bioretention pond for phosphorus removal beside an expressway. The rainwater bioretention pond comprises a low kerb, a water-passing channel, a bioretention pond body, a pervious concrete box body, a phosphorus removal box and a drainage pipe. One end of the water-passing channel is connected with the low kerb, and the other end of the water-passing channel is connected with the bioretention pond body. The pervious concrete box body is arranged in the bioretention pond body, and the bioretention pond body is divided into a left portion and a right portion. The phosphorus removal box is arranged in the pervious concrete box body. The drainage pipe is arranged on the bottom of the bioretention pond body. The rainwater bioretention pond for phosphorus removal beside the expressway removes phosphorus carried in the runoff to some extent in a reinforced mode, and the ability to remove the phosphorus is higher than 80 percent. Meanwhile, the rainwater bioretention pond for phosphorus removal stores, permeates and purifies the rainwater runoff, reduces the downstream rainwater flow and the rainstorm peak flow, reduces direct scouring on a watercourse and the like from rainwater, reduces the erosion phenomenon of the watercourse, and reduces pollution to the water environment from the road.

Description

【Technical field】 [0001] The present invention relates to a rainwater retention pond, in particular to a rainwater biological retention pond for phosphorus removal beside the expressway, which is mainly used beside the expressway, and can also be applied beside other roads if the terrain permits, and belongs to the technology of drainage facilities field. 【Background technique】 [0002] During the rainfall process, rainwater will form runoff along the road surface, and the runoff rainwater is mixed with a large number of surface pollutants, such as organic matter, heavy metals, nitrogen and phosphorus, and so on. If the runoff flows directly into the drainage system at this time, it will increase the load on the drainage system; at the same time, if the runoff flows directly into the river, it will cause river water pollution. When the rainfall is large, the rainwater directly scours the river course, which will also cause the erosion of the river course. How to remove pol...

AI Technical Summary

Problems solved by technology

However, the bioretention tank cannot effectively remove phosphorus in the rainwater, so the concentration of phosphorus in the effluent of the bioretention tank is still relatively high. When the rainwater runoff from the expressway is discharged into the water body, it will still cause eutrophication of the water body and deteriorate the water environment.

So far, no highway bioretention ponds have been found to have a good ability to remove phosphorus from rainwater

Images