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Vertical flow artificial wetland aerobic denitrification system for intermittent operation

A constructed wetland, vertical flow technology, applied in aerobic and anaerobic process treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problems of nitrogen removal, low air transfer efficiency, etc. Achieve the effect of enhancing wetland nitrification and denitrification, enhancing wetland nitrification and denitrification and denitrification processes, and facilitating manufacturing and installation

Inactive Publication Date: 2014-04-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that the air transfer efficiency of the existing oxygen enrichment denitrification system is not high and the nitrogen in the sewage cannot be completely removed from the water body

Method used

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  • Vertical flow artificial wetland aerobic denitrification system for intermittent operation
  • Vertical flow artificial wetland aerobic denitrification system for intermittent operation
  • Vertical flow artificial wetland aerobic denitrification system for intermittent operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The dimensions of the vertical flow constructed wetland 12 are: length×width×height=2m×1m×1m. 6 wetland plants 7 aquatic cannas are planted in the vertical flow constructed wetland 12 . The spray distribution pipe 3 above the vertical flow constructed wetland 12 is provided with 6 branch pipes, the distance between adjacent branch pipes is 20cm, and each branch pipe is provided with 5 atomizing nozzles 6 with a diameter of 15mm, and the adjacent atomizing nozzles The distance between 6 is 15cm, and the atomizing nozzle 6 is a copper 4-point adjustable atomizing nozzle, purchased from Zhuji Lvyin Garden Machinery Factory. The vertical flow artificial wetland 12 is equipped with 4 denitrification exhaust pipes 5 and 4 porous oxygenation pipes 4. The diameter of the air holes on the denitrification exhaust pipe 5 is 5mm, and the distance between the holes is 7mm. The outer wall of the air hole section is wrapped with gauze . A switch is installed on the pipe section expo...

Embodiment 2

[0034] The dimensions of the vertical flow constructed wetland 12 are: length×width×height=6m×3m×2m. 36 wetland plants 7 aquatic cannas are planted in the vertical flow constructed wetland 12 . The spray distribution pipe 3 above the vertical flow constructed wetland 12 is provided with 20 branch pipes, the distance between adjacent branch pipes is 20cm, and each branch pipe is provided with 15 atomizing nozzles 6 with a diameter of 20mm, and the adjacent atomizing nozzles The distance between 6 is 15cm, and the atomizing nozzle 6 is a copper 4-point adjustable atomizing nozzle, purchased from Zhuji Lvyin Garden Machinery Factory. A total of 18 denitrification exhaust pipes 5 and 18 porous oxygenation pipes 4 are installed in the vertical flow constructed wetland 12. The pores on the denitrification exhaust pipe 5 have an aperture diameter of 7mm and a hole spacing of 9mm. The outer wall of the pore segment pipe is wrapped with gauze . A switch is installed on the pipe secti...

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Abstract

The invention discloses a vertical flow artificial wetland aerobic denitrification system for intermittent operation. The system comprises an automatic oxygenation system which is connected with a master intake pipe through a water pump. The automatic oxygenation system is characterized by comprising a spray water distributor, wherein the spray water distributor comprises an atomizer and is connected with a water pump; the spray water distributor is horizontally arranged above the vertical flow artificial wetland; porous gas filled tubes and denitrification exhaust pipes, which are uniformly distributed and vertically arranged, are arranged inside the vertical flow artificial wetland; the bottom of the vertical flow artificial wetland is connected with a master drain pipe. An oxygen-enriched environment is provided for a nitrification region at the middle part and the upper part of the wetland through a group of gas filled tubes which are vertically inserted into the artificial wetland; the contact time and the contact area of inflow water and atmosphere are increased through the spray water distributor so as to form oxygen-enriched inflow water; wetland nitrification and denitrification are enhanced; denitrification gas in the denitrification region can be quickly discharged in the water supply process by controlling a switch at the upper end of each denitrification exhaust pipe; wetland denitrification and nitrogen removal are enhanced, and the denitrification effect of the vertical flow artificial wetland is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to an intermittently operated vertical flow artificial wetland oxygenation and denitrification system, which is suitable for the treatment of domestic sewage, non-point source sewage, polluted surface water and high-concentration ammonia nitrogen wastewater. Background technique [0002] In the context of increasingly serious water eutrophication, water environment nitrogen pollution control and wastewater denitrification treatment have become research hotspots in the field of water treatment. As an ecological and low-cost water treatment technology, constructed wetland has been widely used in the denitrification treatment of sewage and wastewater at home and abroad. There are many denitrification mechanisms in constructed wetlands, among which microbial nitrification / denitrification is generally considered to be the most important deni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
CPCY02W10/10
Inventor 丁怡宋新山王玮王宇晖王俊锋严登明王苏艳何媛
Owner DONGHUA UNIV
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