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Construction method of organic pollution artificial wetland aquatic plant community

A technology for aquatic plants and constructed wetlands, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., to avoid cost increase, improve purification function, and improve plant survival rate.

Active Publication Date: 2017-10-20
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes a method for constructing aquatic plant communities in organically polluted artificial wetlands, and its purpose is to solve the problem of how to construct aquatic plant communities in heavily organically polluted artificial wetlands

Method used

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  • Construction method of organic pollution artificial wetland aquatic plant community
  • Construction method of organic pollution artificial wetland aquatic plant community

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The treatment object is the tail water of a certain urban sewage treatment plant. The annual average concentration of main pollutants is: COD = 113.4mg / L, total nitrogen = 50.6mg / L, total phosphorus = 2.16mg / L, ammonia nitrogen = 12.6mg / L; However, the incoming water of a certain urban sewage treatment plant is the tail water of the local chemical industrial park. In the industrial park, there are many enterprises producing benzene, phenol or cyanide compounds, resulting in the pollution of benzene, phenol or cyanide compounds in the incoming water of this wetland. The content is relatively high. Using a comparative method, the effects of different methods on the survival rate of aquatic plants were studied.

[0040] Table 1. Survival rate of aquatic plants in different methods (%)

[0041]

[0042] It can be seen from Table 1 that the survival rate of aquatic plants in the organic polluted constructed wetland aquatic plant community of the present invention is sign...

Embodiment 2

[0044] A method for constructing aquatic plant communities in organically polluted artificial wetlands, characterized in that the survival rate of aquatic plants is improved by forming aquatic plant root refuges; details are as follows:

[0045] (1) Screening of aquatic plants;

[0046] (2) Screening of constructed wetland matrix;

[0047] (3) Management of subsurface flow wetland water level.

[0048] The aquatic plant is yellow calamus.

[0049] The constructed wetland matrix includes a layer of large-grained stones, a sub-layer of crushed stones, and a layer of loam. The layer of large-grained stones is at the bottom layer, the sub-layer of crushed stones is located above the layer of large-grained stones as the middle layer, and the layer of loam is at the top of the layer of crushed Above the gravel layer, the loam layer is a refuge for the roots of aquatic plants.

[0050] The diameter of the large stones used in the large particle layer is 4cm-6 cm, the overall heigh...

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Abstract

The invention discloses a construction method of an organic pollution artificial wetland aquatic plant community. The method is used for increasing survival rate of aquatic plants by forming an aquatic plant root system shelter and specifically includes following steps: (1), screening aquatic plants; (2), screening artificial wetland matrixes; (3), managing subsurface flow wetland water level. The construction method has the advantages that the survival rate of the aquatic plants at the early growing stage is increased; 2), stress resistance of the aquatic plant community is improved; a virtuous circle is formed; 4), ability of removing eutrophic substances is improved.

Description

technical field [0001] The invention relates to a method for constructing aquatic plant communities in organically polluted constructed wetlands, and belongs to the technical field of advanced treatment of wetlands with tail water structures in sewage treatment plants. Background technique [0002] Tailwater wetlands have various inflows and complex components, especially those used to treat tailwater wetlands in chemical industry parks. Phenols, cyanide organic pollutants, and heavy metals such as mercury, chromium, and arsenic may also have high levels of one or several pollutants; many chemical parks contain benzene, phenol, and cyanide compound manufacturers, resulting in Sewage treatment plants that use tail water from chemical industry parks as incoming water still contain relatively high levels of refractory organics such as benzene, phenols, and cyanide in incoming water and tail water; wetland biological processes (mainly microorganisms and plants) and refractory T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32Y02W10/10
Inventor 赵德华张淼吕丽萍张文娟张慧汪鹏合季军
Owner NANJING UNIV