An ecological restoration device and method for urban black and odorous rivers

Abstract

The invention discloses an ecological restoration device and method for an urban black-odor riverway. The device comprises multi-stage overflow dams arranged at different water level differences of a black-odor river. A plurality of biological floating beds are arranged inside each overflow dam. A nanometer microhole aeration disc is arranged at the bottom of each biological floating bed. Floating plants are arranged inside the biological floating beds. A secondary combined subsurface wetland is arranged at the downstream part of the tail-stage overflow dam and comprises an aeration vertical flow wetland, a bending-flow type horizontal flow wetland and a water pump. Water inside the tail-stage overflow dam is lifted by the water pump and then enters the aeration vertical flow wetland, outflow water of the aeration vertical flow wetland flows into the bending-flow type horizontal flow wetland, and outflow water passing through the bending-flow type horizontal flow wetland flows back to the riverway. The device is simple in structure, low in energy consumption, and capable of efficiently removing nitrogen, phosphorus, sulphur, organic matters, heavy metal and other pollutants in the urban black-odor riverway at the same time.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an ecological restoration device and method for urban black and odorous river courses. Background technique [0002] Urban rivers refer to natural or artificial waterways used in urban areas for flood control, drainage, diversion, water storage, drainage and shipping. At present, while performing the above functions, most urban rivers also take into account the function of pollutant collection. All kinds of urban sewage, especially domestic sewage, are partially discharged into the river, which leads to the imbalance of the original ecological function of the river. Black and odor problems have appeared in many urban rivers one after another, seriously affecting urban development. Eliminating the black and odor of urban rivers and improving the quality of urban water environment has extremely important practical significance for ensuring the health of urban human settle...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a simple-structured, low-energy , and can efficiently remove carbon, nitrogen, sulfur, phosphorus, heavy metals, etc. in urban black and odorous rivers at the same time, and completely solve the problems of black and odorous river sediment silt too deep, water quality deterioration, etc. The ecological restoration device and method of urban black and odorous rivers

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