Technological wetland bank filtration system for treatment of black and odorous rivers

Abstract

The invention relates to a technological wetland bank filtration system for treatment of black and odorous rivers. The technological wetland bank filtration system is arranged in a black and odorous river and close to a revetment, and comprises a wetland unit, a water distributing unit and a draining unit, wherein the wetland unit comprises a bank filtration wall located in the river and close to the revetment, and constructed wetland located between the bank filtration wall and the revetment; the draining unit is located below the constructed wetland and comprises a water collecting layer formed by supporting of the constructed wetland via a supporting device and draining holes located in the bottom of the bank filtration wall and communicated with the water collecting layer; and the draining holes allow water in the water collecting layer to be discharged into the river. The technological wetland bank filtration system provided by the invention does not occupy the resources of the revetment and is increased in resistance to impact load; the system is mainly applied to treatment of black and odorous rivers and can be used for treatment of combined-system overflow sewage and rainwater; the system is flexible in structure and can be designed according to the water quality and water volume of local rivers and rainfall data; and the process of aeration allows the interior of a filter bed to be in a good aerobic state, and no stink is produced in the process of treatment.

Description

Technical field [0001] The invention relates to the technical field of black and smelly river treatment, in particular to a technological wetland bank filter system for black and smelly river treatment. Background technique [0002] At present, most urban rivers in my country are evolving into black and smelly rivers. In many cities in my country, organic pollution in rivers is widespread and increasingly prominent. Urban sewage is directly discharged into the river, and the rivers flowing through cities and towns are seriously polluted. The water body appears seasonal or perennial black and odor. All of these have become the water that urgently needs to be solved in the current urban river pollution problem in my country. Environmental issues. [0003] The slopes of traditional rivers are basically divided into hard and soft banks. Simple stone-built banks (hard banks) are mostly used for flood control and drainage without ecological restoration. The simple soft banks have serious...

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Problems solved by technology

[0003] The slope banks of traditional rivers are basically divided into hard revetments and soft revetments. Simple stone revetments (hard revetments) are mostly used for flood control and drainage and have no ecological restoration function. Simple soft revetments have serious soil erosion and are difficult to manage; At present, there is a river bank slope design. After the combination of landscape and environment, the wetland is added to the revetment, and the rainwater and river water are diverted into the wetland to complete the purification. However, this kind of design occupies more farmland, greening, and requires sewage Centralized treatment of mud ponds, this way of treatment is not high and the effect is not obvious, it is difficult to clean up mud ponds, and the problem of odor is difficult to solve; while soft revetments are generally dominated by scattered plant communities, which play a better landscape and It has the function of preventing water and soil erosion, but its function of water quality treatment in rivers is relatively weak

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