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Mixed purification system and purification method for efficient denitrification of tail water of sewage plant

A technology of purification system and sewage plant, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. And other issues

Pending Publication Date: 2022-04-08
NANJING UNIV ECOLOGICAL RES INST OF CHANGSHU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot effectively utilize the nitrogen and phosphorus in the tail water, and cannot realize the organic combination of sewage treatment and agricultural production

Method used

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  • Mixed purification system and purification method for efficient denitrification of tail water of sewage plant
  • Mixed purification system and purification method for efficient denitrification of tail water of sewage plant
  • Mixed purification system and purification method for efficient denitrification of tail water of sewage plant

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Embodiment 1

[0042] See figure 1 , this embodiment provides a hybrid purification system for highly efficient denitrification of tail water of a sewage plant, including a biofilter enhanced pretreatment area, a crop-type constructed wetland core purification area, and a river purifier pollutant reduction area.

[0043] See figure 2 , the enhanced pretreatment area of ​​the biological filter is equipped with a three-stage biological filter. The design parameters of the filter are: the height of the single-stage packing is 2.5m; the hydraulic retention time of the single-stage empty bed is 18min; the hydraulic load on the surface of the filter is 8.33m 3 / m 2 h; area is 25m 2 .

[0044] Specifically, the three-stage biofilter is a nitrification filter 1 and two denitrification filters (i.e. the first denitrification filter 2 and the second denitrification filter 3), wherein the design parameters of the nitrification filter 1 are : The filter material is ceramsite, with a particle size o...

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Abstract

The invention discloses a mixed purification system for efficient denitrification of tail water of a sewage plant. The mixed purification system comprises a biological filter enhanced pretreatment area, a crop type constructed wetland core purification area and a river purifier pollutant reduction area, the biological filter enhanced pretreatment area is provided with three stages of biological filters, the crop type constructed wetland core purification area comprises a constructed wetland constructed by adopting composite subsurface flow, the constructed wetland is composed of a downstream pool and an upstream pool, and a water guide layer, a transition layer, a first filler layer, a second filler layer, a covering layer and a surface layer are sequentially laid from bottom to top; water is distributed through the water conveying channel; crops are planted on the surface layer; the river channel purifier pollution reduction area comprises a floating wetland arranged at the junction of the river channel and the branch creek, a submerged plant area arranged in the middle of the river channel and emergent floating leaf plant areas arranged on slope banks on the two sides of the river channel. According to the mixed purification system disclosed by the invention, the removal of nitrogen can be enhanced while the ecological function is maintained, and certain economic benefits are provided.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and biological purification, in particular to a hybrid purification system and purification method for efficient denitrification of tail water of a sewage plant. Background technique [0002] At present, the phenomenon of water pollution is still serious, especially the concentration of nitrogen and phosphorus nutrients in the tail water of urban sewage treatment plants is still high. If the tail water is directly discharged into the surrounding water body, it will inevitably affect the eutrophication of the water body and cause water pollution. [0003] At present, artificial wetland technology is mainly used for the treatment of tail water of sewage treatment plants. Although this technology has low cost, stable operation effect, easy maintenance and management, and can effectively improve the water quality of tail water, it has failed to realize the nitrogen and phosphorus resources in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
Inventor 安树青朱正杰傅海峰张轩波史新星
Owner NANJING UNIV ECOLOGICAL RES INST OF CHANGSHU
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