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Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores

A technology of low carbon-to-nitrogen ratio and constructed wetland, applied in the field of water treatment, can solve the problems of poor microbial denitrification effect, easy to reach adsorption saturation, and decline in treatment efficiency, and achieve the effects of convenient management, low investment and operation costs, and stable operation

Active Publication Date: 2013-02-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For the treatment of low C / N sewage in existing constructed wetlands, the microbial denitrification effect is poor, the seasonal adaptability is poor, the treatment effect is poor under low temperature conditions, the adsorption capacity of fillers for phosphorus is low, and it is easy to reach adsorption saturation due to insufficient carbon sources. Blocking the filling area, resulting in a decrease in treatment efficiency, the invention provides a constructed wetland that utilizes minerals to treat sewage with a low carbon-to-nitrogen ratio

Method used

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  • Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores
  • Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores
  • Constructed wetland for treating sewage with low carbon nitrogen ratio by utilizing ores

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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a constructed wetland using minerals to treat sewage with a low carbon-nitrogen ratio first establishes a constructed wetland pool with a size of 5.64m×1.48m×1m (L×W×H). The body of the wetland pool is built with bricks, and a layer of concrete is laid on the bottom to prevent leakage. The constructed wetland pool includes a water inlet pipe 1, a water inlet area 2, a water outlet area 7 and an outlet pipe 8. The water inlet pipe 1 is connected to the water inlet area 2; there can be 2-5 outlet pipes 8, and 3 are preferably selected in this embodiment. The heights of the three water outlet pipes 8 are different, and they are arranged sequentially from high to low. The height of the water level can be adjusted, and the submerged depth of the filler can be changed, so as to adjust the ratio of the aerobic zone and the anoxic zone, and improve the denitrification efficiency. The water outlet pipe 8 is connected to the water outlet area 7; the ...

Embodiment 2

[0040] Same as embodiment 1, the difference is that the backwashing pipe 5 is also included inside the packing area 6, and the backwashing pipe 5 is arranged in the horizontal direction and the vertical direction of the packing area 6, and the backwashing pipe 5 is equidistantly provided with outlet holes. The thickness of the limestone inside the water intake area 2 is 0.7m; the volume ratio of pyrite and limestone filled in the filling area 6 is 5:1, and the height of the filling area is 0.8m; the reed planting density is 10 plants / m 2 ; Outlet pipe 8 has 5. When the packing area 6 is blocked, the backwash pipe 5 can be opened to flush the inside of the packing area 6 . The heights of the five water outlet pipes 8 are different, and they are arranged in order from high to low. The height of the water level can be adjusted, and the submerged depth of the filler can be changed, so as to adjust the ratio of the aerobic zone and the anoxic zone, and improve the denitrification ...

Embodiment 3

[0042] Same as Example 1, the difference is that the inside of the filling area 6 also includes a backwash pipe 5; the thickness of the limestone inside the water inlet area 2 is 0.4m; the volume ratio of pyrite and limestone filled inside the filling area 6 is 1:1 , the height of filling area 6 is 0.5m; the planting density of reeds is 8 plants / m 2 ; Outlet pipe 8 has 2.

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Abstract

The invention discloses a constructed wetland for treating sewage with a low carbon nitrogen ratio by utilizing ores, and belongs to the technical field of water treatment. The constructed wetland comprises a water charging pipe, a water charging region, a water discharging region and a water discharging pipe, wherein the water charging pipe is connected with the water charging region; and the water discharging pipe is connected with the water discharging region. The constructed wetland further comprises a water distributing region, a soil layer and a filler region, wherein the water charging region, the water distributing region, the filler region and the water discharging region are sequentially connected; limestone is filled in the water charging region; pyrite and limestone are filled in the filler region; and the soil layer is arranged at the upper part of the filler region. The constructed wetland for treating the sewage with the low carbon nitrogen ratio by utilizing the ores, disclosed by the invention, has the advantages of high treatment efficiency, stable operation, low investment cost, convenience in management, attractive appearance and practicability and the like, the pyrite is used as a filler to carry out nitrogen and phosphorus removal, the resource utilization of the ores is realized, and the development prospect is good; and the constructed wetland is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and more specifically relates to an artificial wetland for treating sewage with a low carbon-to-nitrogen ratio by using minerals. Background technique [0002] Constructed Wetlands is a treatment system similar to swamps that is artificially built, supervised and controlled. It uses the triple synergy of physics, chemistry and biology in the natural ecosystem to purify sewage. Constructed wetland belongs to a method of ecological sewage treatment, which can be used as an effective alternative to traditional sewage treatment technology. The attention and attention of countries all over the world. [0003] Constructed wetlands can be built into free surface flow wetlands, subsurface flow wetlands and vertical flow wetlands according to the form of water flow. Among them, subsurface wetlands can make full use of the biofilm on the surface of fillers and plant roots to treat sewage. The tre...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 李睿华张菁李杰胡俊松孙茜茜
Owner NANJING UNIV
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