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Wastewater autotrophic denitrification nitrogen removal device and wastewater treatment method

An autotrophic denitrification and denitrification technology, which is applied in the field of wastewater autotrophic denitrification and denitrification devices, can solve the problems of low utilization rate and mass transfer rate of reducing sulfide, low reactor processing capacity, and incomplete denitrification treatment, etc. , to achieve the effect of facilitating microbial film formation, preventing device blockage, and improving corrosion conditions

Pending Publication Date: 2019-02-22
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the fact that the existing heterotrophic denitrification technology requires an external carbon source, the sludge yield in the denitrification process is high; the autotrophic denitrification process is prone to unstable influent water quality, uneven speed, utilization rate of reducing sulfides and mass transfer The rate is low, resulting in low processing capacity per unit volume of the reactor, incomplete denitrification treatment, etc.

Method used

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  • Wastewater autotrophic denitrification nitrogen removal device and wastewater treatment method
  • Wastewater autotrophic denitrification nitrogen removal device and wastewater treatment method
  • Wastewater autotrophic denitrification nitrogen removal device and wastewater treatment method

Examples

Experimental program
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Embodiment 1

[0034] Such as figure 1 As shown, the device mainly includes a pre-settlement filter system, an internal circulating fluidized sulfur sand bed and a radial flow settler 14. 0.5mm) microporous screen microfiltration machine 2, peristaltic pump 4, conical sedimentation concentration tank 5 and supernatant liquid pool 6 at the bottom. Connect to the flow settler 15, the water outlet of the microfilter 2 is connected to the sedimentation concentration tank 5 through a pipeline, the upper outlet of the sedimentation concentration tank 5 is connected to the supernatant pool 6, and the supernatant pool 6 is connected to the internal circulating fluidized sulfur sand bed The bottom water inlet is connected, and the connecting pipe between the microfilter 2 and the sedimentation concentration tank 5 is provided with a peristaltic pump 4, and the microfilter 2 is also provided with a total water outlet 3;

[0035] The internal circulating fluidized sulfur sand bed includes a cylinder b...

Embodiment 2

[0047] In this embodiment, the device is further optimized on the basis of Embodiment 1. The drum of the microfilter 2 is provided with micropores with an aperture ranging from 0.9 to 1.0 mm (the aperture in this embodiment is 1.0 mm). Screens for separating solid waste from aquaculture wastewater.

[0048] The particle size range of the internal circulating fluidized sulfur sand bed cylinder is 0.45-0.82mm sulfur particles, the height of the fixed bed is 1.0m, and the width of the water inlet slit of the annular water inlet chamber 8 can be set within a range of 6-9mm In this embodiment, the width of 8mm is preferably set. After the waste water enters the annular water inlet chamber 8, a strong rotating water flow is generated, and then enters the cylinder 10 through the water inlet slit, and a strongly rotating upward water flow is generated under the action of the reflecting bottom plate 7. The water flow It drives the sulfur particles to rotate and float up, so that the sa...

Embodiment 3

[0059]This embodiment is further optimized on the basis of Embodiment 1. The drum of the microfilter is provided with a microporous screen with an aperture ranging from 1.1 to 1.2 mm (the aperture in this embodiment is 1.2 mm). , for the separation of solid waste in aquaculture wastewater.

[0060] The width range of the water inlet slit of the annular water inlet cavity of the internal circulating fluidized sulfur sand bed is 8 to 10mm, and the width of 10mm is preferably set in this embodiment. After the waste water enters the annular water inlet cavity, a strong rotating water flow is generated. Then it enters the cylinder through the water inlet slit, and under the action of the reflecting bottom plate, a strong rotating upward water flow is generated. The water flow drives the gravel to rotate and float up, making the sand bed expand, and finally flows out from the upper outlet.

[0061] The manufacturing material of the internal circulation fluidized sulfur sand bed is s...

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Abstract

The invention discloses a wastewater autotrophic denitrification nitrogen removal device and wastewater treatment method, and belongs to the field of wastewater treatment. The device comprises a pre-settling filtration system, an internal circulation fluidized sulfur sand bed, and a radial flow depressor. Pre-treatment, deep treatment, and post-treatment are combined, thereby improving the wastewater purification efficiency and reducing the risk of blockage of the device during a wastewater autotrophic denitrification nitrogen removal process; the fluidized sulfur sand bed is provided with aninternal circulation backwater device and combined with external circulation backwater to fully exert a sulfur autotrophic denitrification effect, thereby increasing a contact time of wastewater withsulfur particles, improving a nitrate removal rate, and increasing a water inflow; a biofilm is washed, the corrosion of influent is alleviated, the concentration of poison is reduced, and the biofilmis kept active. The materials selected by the invention have the advantages of low cost and remarkable effect, and is especially suitable for nitrogen-containing aquaculture wastewater treatment, andhas a large market prospect and the value of popularization and application.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to a waste water autotrophic denitrification denitrification device and method. Background technique [0002] In recent years, the aquaculture method has transitioned from the previous extensive and semi-intensive farming to intensive farming. However, due to the one-sided pursuit of economic benefits, the breeding density is too high, the breeding species is single, the balance of the natural ecological system in the breeding water is broken, and self-pollution serious. In addition, as the breeding time increases, the aquaculture water body will contain higher concentrations of organic pollutants such as nitrogen and phosphorus. If these water bodies are continuously discharged into the environment without corresponding purification treatment, it will cause eutrophication of the water body. , seriously affecting the water quality of the environmental water body, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/12C02F11/121C02F103/20C02F101/16
CPCC02F9/00C02F11/12C02F11/121C02F2103/20C02F2001/007C02F2101/163C02F3/28C02F1/001Y02W10/10
Inventor 汪龙眠庞晴晴张爱国张毅敏江赜伟彭福全高月香晁建颖徐斌孔明
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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