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An integrated constructed wetland system for enhanced nitrogen and phosphorus removal

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, convenient operation and low cost

Active Publication Date: 2017-04-12
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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  • An integrated constructed wetland system for enhanced nitrogen and phosphorus removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, an integrated constructed 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 sequentially along the water flow direction. The emergent plant wetland 1 includes an enhanced denitrification medium layer and a shallow water layer 3 above it, and the enhanced denitrification medium layer includes a denitrification pre-treatment area and a denitrification post-treatment Zone 7, the denitrification pre-treatment zone includes a plant carbon source filler layer 8 with a thickness of 15cm below and a soil layer 9 with a thickness of 20m above; the denitrification post-treatment zone 7 is filled with soil; the denitrification pre-treatment zone 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 ar...

Embodiment 2

[0035] Such as figure 1 As shown, an integrated constructed wetland system for enhanced denitrification and phosphorus removal is a surface flow wetland, including emergent plant wetland 1 and submerged plant wetland 2 arranged in sequence along the water flow direction, and emergent plant wetland 1 includes enhanced denitrification The medium layer and the shallow water layer 3 above it are planted with emergent plants 4 on the enhanced denitrification medium layer; the submerged plant wetland includes the enhanced phosphorus removal medium layer and the deep water layer 6 above it, and planted on the enhanced phosphorus removal medium layer There are submerged plants5.

[0036] The enhanced denitrification medium layer is provided with a denitrification pre-treatment area and a denitrification post-treatment area 7 sequentially along the water flow direction. The denitrification pre-treatment area is composed of the lower plant carbon source filler layer 8 and the upper soil...

Embodiment 3

[0041] Such as figure 1 As shown, an integrated constructed wetland system for enhanced denitrification and phosphorus removal is a surface flow wetland, including emergent plant wetland 1 and submerged plant wetland 2 arranged in sequence along the water flow direction, and emergent plant wetland 1 includes enhanced denitrification The medium layer and the shallow water layer 3 above it are planted with emergent plants 4 on the enhanced denitrification medium layer; the submerged plant wetland includes the enhanced phosphorus removal medium layer and the deep water layer 6 above it, and planted on the enhanced phosphorus removal medium layer There are submerged plants5.

[0042] The enhanced denitrification medium layer is provided with a denitrification pre-treatment area and a denitrification post-treatment area 7 sequentially along the water flow direction. The denitrification pre-treatment area is composed of the lower plant carbon source filler layer 8 and the upper soil...

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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 fields of water pollution control and ecological restoration, in particular to an integrated constructed wetland system for strengthening denitrification and dephosphorization. Background technique [0002] At present, the eutrophication of water body 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-pollution water discharged up to the standard is becoming more and more serious to the lake water environment. Although most of the nitrogen and phosphorus content in these low-pollution waters can meet the national water quality discharge standards, they are still several times, or even dozens of times, higher than the surface water quality standards. Water bodies pose a greater threat and urgently need to be dealt with. [0003] In low-pollution water, low-pollution water wit...

Claims

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Application Information

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Patent Type & Authority Patents(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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