System and method for ecological treatment and utilization of urban rainwater

Abstract

The invention discloses a system and a method for ecological treatment and utilization of urban rainwater. The system comprises a water collecting well, a vertical ecological filter tank and a reservoir which are communicated with one another in sequence through pipelines, wherein the water collecting well is used for precipitation and pre-treatment of collected rainwater, so as to remove part of suspended particles; a grill for removing suspended matter, not easy to precipitate, in the rainwater is arranged on the communication pipeline between the water collecting well and the vertical ecological filter tank; the vertical ecological filter tank comprises a tank body; a support layer, a ceramsite layer, a zeolite layer and a gravel layer are arranged in the tank body in sequence from the bottom up; gravel areas are arranged on the two sides of the zeolite layer and those of the gravel layer; aquatic plants are planted in the zeolite layer; a water distributor is arranged at the upper part of the tank body; a drain pipe is arranged at the bottom of the tank body; the reservoir comprises a reservoir body; a water inlet communicated with the drain pipe is formed in the reservoir body; aeration devices are arranged in the reservoir body.

Description

technical field [0001] The invention relates to a sewage treatment technology and method, in particular to a system and method for urban rainwater ecological treatment and utilization, and belongs to the technical field of environmental protection. Background technique [0002] Rainfall is the main source of surface runoff, an important part of the water cycle in the urban ecosystem, and plays a very important role in regulating and replenishing regional water resources and improving the urban ecological environment. However, the expansion of the urban construction area in recent years has led to an increase in the surface hardening area, which greatly reduces the chance of rainwater seeping down to form soil water and groundwater. Most of the rainwater is directly collected to form surface runoff, causing urban rainwater runoff velocity, The increase in flow and runoff peaks has brought great pressure on urban flood control and drainage. At the same time, due to atmospheri...

AI Technical Summary

Problems solved by technology

The above two published patents have proposed certain solutions for rainwater collection and utilization, but neither mentioned the treatment facilities and methods for rainwater, and the utilization of collected rainwater is limited.

[0005] At present, the utilization of urban rainwater in my country is in the exploratory stage, and there is a big gap in rainwater collection and mature treatment technologies

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