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Artificial wetland module and application thereof

A Constructed Wetland, Electron Donor Technology

Pending Publication Date: 2021-01-05
SHANGHAI WATERWAY ENG DESIGN & CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon source delivery pipe is located at the bottom of the wetland, and it will be difficult to repair once it is damaged or blocked; the wetland must be emptied when replenishing the carbon source, which will affect the normal operation of the constructed wetland; since the carbon source delivery pipe is located at the bottom of the wetland, there is no light, it is difficult to observe the depletion of the slow-release carbon source in the tube

Method used

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  • Artificial wetland module and application thereof
  • Artificial wetland module and application thereof
  • Artificial wetland module and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Constructed Wetland Module

[0042] see Figure 1 to Figure 4 , an assembled constructed wetland module capable of replenishing solid-state electron donors, comprising a frame 1 and a solid-state electron donor supplementary unit, the solid-state electron donor supplementary unit is accommodated in the frame 1; the solid-state electron donor supplementary unit consists of a hollowed-out isolation tube 2 and the groove 3 on the frame chassis, the isolation tube 2 is supported and fixed by the groove 3 provided on the frame chassis.

[0043] In the present embodiment, the frame 1 is a regular hexagonal prism of galvanized steel wire, with a side length of 0.3m, a column height of 1m, and an aperture of 3-8mm. The corners at the top of the frame are provided with suspension rings 4. In the present embodiment, a total of Three lifting rings are set to facilitate hoisting during construction.

[0044] The isolation tube 2 of the solid-state electron donor supplementary uni...

Embodiment 2

[0052] Constructed Wetland Module

[0053]The difference from Example 1 is that the solid-state electron donor supplementary unit also includes a hollow basket ( Figure 5 ), the solid-state electron donor is accommodated in the basket; the basket is placed in the solid-state electron donor supplementary unit, that is, in the isolation tube. The basket is cylindrical with a diameter of 0.18m and a column height of 1m. It is made of polyethylene. The column wall and bottom are hollowed out with a hole diameter of 2-10mm. There is a handle on the top of the basket.

[0054] Other structures are the same as embodiment 1, and the application method is the same as embodiment 1.

[0055] When the influent water is the first-class A standard tail water of the sewage treatment plant, the concentration of nitrate nitrogen is 5-15mg / L, and the hydraulic load of the constructed wetland is set to 1m 3 / (m 2 When d), the average concentration of nitrate nitrogen in the effluent is 0.75m...

Embodiment 3

[0057] Constructed Wetland Module

[0058] The difference between this embodiment and Embodiment 1 is: this embodiment uses the entire frame as a solid-state electron donor supplementary unit, without isolation tubes, and the interior is completely filled with solid-state electron donors; the frame of this embodiment is a square quadrilateral A prism with a side length of 0.5m and a height of 1m, made of reinforced concrete, the hole diameter on the wall is 5mm, the hole spacing is 25mm, and there is a lifting ring at each of the four corners of the top.

[0059] Application of the constructed wetland module

[0060] In this embodiment, a horizontal subsurface flow wetland is constructed by an assembled artificial wetland module that can supplement solid-state electron donors, which is used to strengthen the denitrification of tail water of sewage treatment plants. The structure of the wetland is as follows Figure 8 with Figure 9 As shown, the details are as follows:

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Abstract

An artificial wetland module comprises a solid-state electron donor supplementing unit and a frame, and the solid-state electron donor supplementing unit is contained in the frame; the frame is a hollow cylinder, and the cylinder wall is of a hollow structure. The solid-state electron donor supplementing unit is a solid-state electron donor and is filled in the frame. The solid-state electron donor supplementing unit further comprises a hollowed-out isolation tube, and a solid-state electron donor is contained in the isolation tube. According to the application of the constructed wetland module in the water treatment technology, the constructed wetland comprises a water inlet end, a treatment area and a water outlet end, and the treatment area is formed by assembling a plurality of constructed wetland modules. The artificial wetland is simple in structure and convenient to construct, the wetland filler laying quality can be guaranteed, the construction efficiency of the artificial wetland is improved, solid electron donors can be supplemented conveniently, and the denitrification function of the wetland is enhanced. The artificial wetland is convenient to clean, blockage is eliminated, the wetland structure cannot be greatly damaged, the wetland function cannot be damaged, and the wetland function can be recovered in a short time.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to an assembled constructed wetland module capable of supplementing solid-state electron donors, especially a type suitable for water treatment with a low carbon-to-nitrogen ratio. Background technique [0002] Constructed wetland is an organic system composed of three elements: plants, microorganisms and fillers. Fillers play a central role in the water purification process of constructed wetlands. Studies have shown that the filler plays a major role in the removal of phosphorus, and the biofilm on the surface of the filler plays a leading role in the removal of organic matter and nitrogen. Therefore, the design and construction of constructed wetland filler is one of the keys in the application of constructed wetland engineering. [0003] With the application of new investment and financing construction models such as EPC and PPP in water environment treatment projects, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32
Inventor 赵东华岳冬梅葛俊吴耀
Owner SHANGHAI WATERWAY ENG DESIGN & CONSULTING
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