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Enhanced nitrogen and phosphorus removal integrated constructed wetland system

A constructed wetland system, nitrogen and phosphorus removal technology, applied in the field of water pollution control and ecological restoration, can solve problems such as unfavorable wetland plant growth, and achieve the effect of simple structure, low cost and convenient operation

Active Publication Date: 2015-11-11
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, studies have pointed out that the use of waste sludge from water supply plants alone as filler is not conducive to the growth of wetland plants.

Method used

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  • Enhanced nitrogen and phosphorus removal integrated constructed wetland system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, an integrated artificial wetland system for enhanced nitrogen and phosphorus removal includes emergent plant wetland 1 and submerged plant wetland 2 in sequence along the water flow direction.

[0028] The emergent plant wetland 1 is in sequence along the flow direction. The emergent plant wetland 1 includes an enhanced denitrification medium layer and an upper shallow water layer 3, and the enhanced denitrification medium layer includes a denitrification pre-treatment zone and a denitrification post-treatment zone. Zone 7. The pre-treatment zone for denitrification includes a plant carbon source filler layer 8 with a thickness of 15 cm below and a soil layer 9 with a thickness of 20 m above; the post-denitrification treatment zone 7 is filled with soil; the pre-treatment zone for denitrification and The area ratio of the post-denitrification treatment zone is 1:3. Emergent plants 4 are planted on the enhanced denitrification medium layer, which...

Embodiment 2

[0035] Such as figure 1 As shown, an integrated artificial wetland system for enhanced nitrogen and phosphorus removal is a surface wetland, including emergent plant wetland 1 and submerged plant wetland 2 arranged in sequence along the direction of water flow, emergent plant wetland 1 includes enhanced nitrogen removal The medium layer and the upper shallow water layer 3 are planted on the enhanced denitrification medium layer with emergent plants 4; the submerged plant wetland includes the enhanced phosphorus removal medium layer and the upper deep water layer 6, which are planted on the enhanced phosphorus removal medium layer There are submerged plants 5.

[0036] The enhanced denitrification medium layer is provided with a denitrification pre-treatment zone and a denitrification post-treatment zone 7 in sequence along the water flow direction. The denitrification pre-treatment zone is composed of a lower plant carbon source filler layer 8 and an upper soil layer 9. Zone 7 i...

Embodiment 3

[0041] Such as figure 1 As shown, an integrated artificial wetland system for enhanced nitrogen and phosphorus removal is a surface wetland, including emergent plant wetland 1 and submerged plant wetland 2 arranged in sequence along the direction of water flow, emergent plant wetland 1 includes enhanced nitrogen removal The medium layer and the upper shallow water layer 3 are planted on the enhanced denitrification medium layer with emergent plants 4; the submerged plant wetland includes the enhanced phosphorus removal medium layer and the upper deep water layer 6, which are planted on the enhanced phosphorus removal medium layer There are submerged plants 5.

[0042] The enhanced denitrification medium layer is provided with a denitrification pre-treatment zone and a denitrification post-treatment zone 7 in sequence along the water flow direction. The denitrification pre-treatment zone is composed of a lower plant carbon source filler layer 8 and an upper soil layer 9. Zone 7 i...

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Abstract

The invention discloses an enhanced nitrogen and phosphorous removal integrated constructed wetland system. The system is a surface flow wetland, and comprises an emergent aquatic plant wetland (1) and a submerged plant wetland (2) which are sequentially arranged along the water flow direction, wherein the emergent aquatic plant wetland (1) comprises an enhanced nitrogen removal medium layer and a shallow-water surface (3) arranged at the upper part of the enhanced nitrogen removal medium layer; emergent aquatic plants (4) are planted in the enhanced nitrogen removal medium layer; the submerged plant wetland (4) comprises an enhanced phosphorous removal medium layer and a deep-water layer (6) arranged at the upper part of the enhanced phosphorous removal medium layer; and submerged plants (5) are planted in the enhanced phosphorous removal medium layer. The enhanced nitrogen and phosphorous removal integrated constructed wetland system can be used for realizing sewage treatment synchronously, efficiently and economically.

Description

Technical field [0001] The invention relates to the field of water pollution control and ecological restoration, in particular to an integrated artificial wetland system for strengthening nitrogen and phosphorus removal. Background technique [0002] At present, the eutrophication of water bodies caused by excessive input of nitrogen and phosphorus is one of the main problems of lake water environment. With the improvement of sewage treatment rate and treatment level, the pollution load of low-polluted water discharged up to the standard has become more and more prominent. Although most of the nitrogen and phosphorus content in these low-polluted waters can meet the national water quality standards, they are still several times or even dozens of times higher than the surface water quality standards. Moreover, the amount of such low-polluted water is large, and its direct discharge is natural to the lake. Water bodies pose a greater threat and urgently need to be dealt with. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 储昭升高思佳王海燕叶碧碧庞燕
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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