Combined roundabout flow type constructed wetland structure

Abstract

The invention discloses a combined roundabout flow type constructed wetland structure. The combined roundabout flow type constructed wetland structure comprises an upper circular wetland and a lower circular wetland which are concentrically overlapped; a water feeding pipe which extends into the upper circular wetland is arranged along the bottom part of the lower circular wetland; a plurality of water distributing branch pipes connected with the water feeding pipe are horizontally arranged in the upper circular wetland; a plurality of brick walls through which water flows about the lower circular wetland are arranged in the lower circular wetland. According to the combined roundabout flow type constructed wetland structure, water can flow around the upper and lower circular wetlands through the circular wetlands which are overlapped in the upper part and the lower part, so that the time of water staying in the wetlands can be prolonged, the pollutant treatment load can be effectively reduced, and the water quality indicator of the drained water can be improved; the overlapped concentric circle structure of the constructed wetland structure can improve the landscaping function of the whole structure and beautify the environment. The combined roundabout flow type constructed wetland structure is applied to the field of pond construction of the constructed wetlands.

Description

technical field [0001] The invention relates to the field of pool structure of artificial wetland, in particular to a compound circuitous flow artificial wetland structure. Background technique [0002] Composite constructed wetland technology has more efficient pollutant removal performance than traditional single constructed wetland technology, among which vertical flow and horizontal subsurface flow composite wetland is more prominent, and is widely used to treat urban domestic sewage and some industrial sewage. [0003] This type of wetland combines the characteristics of vertical flow and horizontal subsurface flow. After pretreatment, the sewage is intermittently distributed to the surface of the filter bed in the vertical flow wetland, and then flows vertically and vertically into the horizontal subsurface flow wetland by gravity, combining physical filtration of the substrate and plants. The biochemical reaction with microorganisms effectively treats various types of...

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Problems solved by technology

[0005] In the vertical flow part of the traditional composite constructed wetland with vertical and horizontal subsurface flow, the hydraulic retention time is short, the biochemical reaction takes a long time, and the reaction is not complete. The sewage has flowed into the horizontal subsurface flow part, thus increasing the pollution load of the horizontal subsurface flow part. , and the rectangular composite constructed wetlands have weakened landscape functions, failing to give full play to the maximum economic and environmental functions of constructed wetlands

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