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Artificial wetland system and method for treating wastewater containing nitrogen and phosphor with artificial wetland system

A constructed wetland system and wastewater technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as difficult regeneration, difficult nitrogen and phosphorus to be used by plants, easy saturation of treated wastewater, etc., to achieve Reduce the content of eutrophic substances, achieve environmental protection requirements and rational use of resources, and achieve high efficiency in nitrogen and phosphorus removal

Inactive Publication Date: 2016-08-31
ELION SHOUJIAN ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a constructed wetland system, which can solve the problem that the existing constructed wetland system is easy to saturate and difficult to regenerate wastewater, and the absorbed nitrogen and phosphorus are difficult to be used by plants

Method used

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  • Artificial wetland system and method for treating wastewater containing nitrogen and phosphor with artificial wetland system
  • Artificial wetland system and method for treating wastewater containing nitrogen and phosphor with artificial wetland system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment adopts as figure 1 The constructed wetland system shown above treats the above-mentioned nitrogen and phosphorus wastewater, and the treatment method includes the following steps:

[0064] (1) The mass fraction of 31% HCl solution and MgCl are respectively adopted in the influent pool 1 2 The solution adjusts the pH value and ion molar ratio of the wastewater respectively, so that the pH value of the prepared wastewater is 8.5, and the NH 4 + : PO 4 3- : Mg 2+ The molar ratio is 1:1:2.

[0065] (2) Close the water outlet 8 of the system, open the water inlet 3, and let the prepared wastewater enter the artificial wetland through the water distributor 2, stop the water intake after the filler matrix is ​​completely submerged, and soak for 72 hours.

[0066] (3) Open the system water inlet 3 and the system water outlet 8 to make the constructed wetland system operate normally: nitrogen and phosphorus wastewater enters the constructed wetland system, ...

Embodiment 2

[0068] This embodiment adopts as figure 1 The constructed wetland system shown above treats the above-mentioned nitrogen and phosphorus wastewater, and the treatment method includes the following steps:

[0069] (1) adopting mass fraction to be 20% H 3 PO 4 The solution and seawater adjust the pH value and ion molar ratio of the wastewater, respectively, so that the pH value of the prepared wastewater is 9, and the NH 4 + : PO 4 3- : Mg 2+ The molar ratio is 1:0.9:5.

[0070] (2) Close the water outlet 8 of the system, open the water inlet 3, let the prepared wastewater enter the artificial wetland through the water distributor 2, stop the water intake after the filler matrix is ​​completely submerged, and soak for 80 hours.

[0071] (3) Open the system water inlet 3 and the system water outlet 8 to make the constructed wetland system operate normally: nitrogen and phosphorus wastewater enters the constructed wetland system, enters the functional area through the water ...

Embodiment 3

[0073] This embodiment adopts as figure 1 The constructed wetland system shown above treats the above-mentioned nitrogen and phosphorus wastewater, and the treatment method includes the following steps:

[0074] (1) The mass fraction of 31% H is respectively adopted in the influent pool 1 3 PO4 solution and MgCl 2 The solution adjusts the pH value and ion molar ratio of the wastewater respectively, so that the pH value of the prepared wastewater is 8, and the NH 4 + : PO 4 3- : Mg 2+ The molar ratio is 1:1.1:3.

[0075] (2) Close the water outlet 8 of the system, open the water inlet 3, and let the prepared waste water enter the artificial wetland through the water distributor 2. After the filler matrix is ​​completely submerged, stop the water intake, and soak for 70 hours.

[0076] (3) Open the system water inlet 3 and the system water outlet 8 to make the constructed wetland system operate normally: nitrogen and phosphorus wastewater enters the constructed wetland sy...

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Abstract

The invention discloses an artificial wetland system and a method for treating wastewater containing nitrogen and phosphor with the artificial wetland system. The system comprises a water distribution region which is used for introducing the wastewater containing nitrogen and phosphor into the artificial wetland system, a functional region which is used for removing nitrogen and phosphor elements in the wastewater and a drainage region which is used for draining nitrogen and phosphor removed wastewater out of the artificial wetland system, which are arranged from top to bottom sequentially. According to the artificial wetland system, the proportion of ion content in the wastewater containing nitrogen and phosphor can be regulated, so that a struvite seed crystal can be formed by the wastewater containing nitrogen and phosphor in the functional region, struvite fertilizer can be effectively formed by nitrogen and phosphor elements and deposited on the filler surface, entrapment, adsorption and enrichment of the system on nitrogen and phosphor elements in the wastewater can be promoted, and the wetland plant roots can constantly decompose and absorb nitrogen and phosphorous substances and constantly generate struvite to achieve dynamic balance. The artificial wetland system can stably run for a long time, has high denitrification and dephosphorization efficiency, can sustainably supply fertilizer to plants, and can meet environment protection requirement and realize resource reasonable utilization.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a constructed wetland system and a method for treating nitrogen and phosphorus wastewater using the constructed wetland system. Background technique [0002] With the development of the economy, the eutrophication of water bodies in our country has increased sharply, and algal blooms in rivers and lakes have occurred from time to time. Nitrogen and phosphorus elements are the main factors causing eutrophication of water bodies, and constructed wetlands have been widely used as an advanced treatment method for ecological wastewater. The principle of removing nitrogen, phosphorus and organic pollution in constructed wetlands is to use the triple synergistic effect of the system's internal filler matrix, physical precipitation of plants and microorganisms, chemical adsorption, biological absorption, decomposition and transformation. Nitrogen and phosphorus elements are the main ...

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 甘平冯嵩赵晋灵周广福王宝驹
Owner ELION SHOUJIAN ECOLOGICAL TECH CO LTD
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