Combined-flow artificial wetland system for enhanced treatment of eutrophic water body

A constructed wetland system and eutrophication technology, applied in the field of composite flow constructed wetland system, can solve the problems of blockage and shorten the life span of constructed wetland, and achieve the effect of strengthening the denitrification effect and improving the carbon-nitrogen ratio.

Active Publication Date: 2017-08-18
北京国资融资租赁股份有限公司
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Problems solved by technology

[0005] In addition, the bottom surface of existing constructed wetlands is designed as a horizontal surfac

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  • Combined-flow artificial wetland system for enhanced treatment of eutrophic water body
  • Combined-flow artificial wetland system for enhanced treatment of eutrophic water body
  • Combined-flow artificial wetland system for enhanced treatment of eutrophic water body

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[0035] see Figure 1-3 , the purpose of the present invention is to improve the carbon-nitrogen ratio, expand the anoxic zone of the system, and strengthen the nitrogen and phosphorus removal effect of the constructed wetland by optimizing the structure of the constructed wetland, the direction of water flow and the configuration of the filler.

[0036] Through the setting of partitions, the pool body constituting the wetland is divided into three treatment units, that is, the first unit, the second unit and the third unit in sequence along the water flow direction. The optimal volume ratio of each unit is 1:2:1. The body is generally cuboid, and the bottom surface has a certain slope, which is about 1%. The surface elevation of each unit filler decreases by 5-10cm along the water flow direction. The bottom of each unit has a triangular protrusion 20 capable of forming a certain transverse slope, with an angle of 10°-20°, and vent pipes 14 are arranged on both sides of the low...

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Abstract

The invention provides a combined-flow artificial wetland system for enhanced treatment of a eutrophic water body. The bottom surface of a tank body is a longitudinal inclined plane with a high front part and a low rear part; the tank body is divided into a first unit, a second unit and a third unit in sequence along a water flow direction; water distribution layers are arranged at the bottoms of all the units and overflow weirs are arranged at rear ends of all the units; overflowing output water of the former unit is connected with the water distribution layer of the next unit; main filling layers of the first unit and the third unit are made of volcanic rocks and gravels/fly ash; the main filling layer of the second unit is a straw layer and/or a humus soil layer; reeds are planted in the first unit and the third unit and typha orientalis is planted in the second unit. The combined-flow artificial wetland system provided by the invention has a high nitrogen and phosphorus removal capability and is not easy to block.

Description

technical field [0001] The invention relates to a compound flow artificial wetland system for strengthening treatment of eutrophic water bodies, and belongs to the technical field of environmental protection. Background technique [0002] In recent years, due to the development of the economy and the improvement of the living standards of residents, a large amount of sewage without proper treatment has been discharged into rivers, lakes and other water bodies, resulting in the increasingly serious phenomenon of eutrophication in rivers in our country. Eutrophic water bodies generally have the characteristics of low carbon-to-nitrogen ratio (generally less than 3) and low phosphorus concentration (generally less than 1mg / L), and nitrogen mainly exists in the form of nitrate nitrogen, which brings great benefits to water body denitrification and phosphorus removal. difficulty. [0003] Constructed wetland sewage treatment technology is widely used in the field of sewage treat...

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Application Information

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IPC IPC(8): C02F3/30C02F3/32
CPCC02F3/30C02F3/32Y02W10/10
Inventor 李瑞兴
Owner 北京国资融资租赁股份有限公司
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