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Artificial wetland device for denitrification of low-pollution water and treatment method thereof

A technology for low-pollution water and constructed wetlands, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve rare problems such as real-time monitoring, optimization and integration, etc. Achieve the effects of strengthening importance, increasing quantity and activity, and high nitrogen removal efficiency

Inactive Publication Date: 2014-08-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reasonable control and optimization of parameters such as temperature, light, dissolved oxygen, pH and oxidation-reduction potential (ORP) have an important impact on the treatment efficiency of constructed wetlands. There is not much research on real-time monitoring, optimization and integration of these parameters
At present, there is a lack of constructed wetland devices and treatment methods for denitrification of low-pollution water with high treatment efficiency and good long-term stability

Method used

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  • Artificial wetland device for denitrification of low-pollution water and treatment method thereof
  • Artificial wetland device for denitrification of low-pollution water and treatment method thereof
  • Artificial wetland device for denitrification of low-pollution water and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The emergent plant 1 is selected from the evergreen Siberian Iris, and the submerged plant 2 is selected from the Elodea that grows well in winter; Bacterial composition; the optimization and laying of the filler area are as follows: the bottom layer is paved with pebbles, the particle size of which is 1-2cm, and the height is 5-8cm; the upper part is zeolite for artificial wetlands, and the particle size of said zeolite is 5-8mm Left and right, the laying height is about 25-30cm; then fill the high-grade volcanic rock, the particle size of the high-grade volcanic rock is 5mm, and the filling height is 15-20cm; then add highly active nitrifying sludge, and the height of this layer is controlled at 10 -15cm; the environmental parameters of the constructed wetland device 21 and the physical and chemical parameters in the device are as follows: the light intensity is 4000Lux, controlled by the light intensity sensor 15, the temperature is 20±1°C, realized by the heatable wa...

Embodiment 2

[0068]The emergent plant 1 is selected from the evergreen Siberian Iris, and the submerged plant 2 is selected from the black algae that grows well in winter; the denitrification microbial bacterial solution is composed of ammonifying bacteria, nitrosifying bacteria, nitrifying bacteria and denitrifying bacteria The optimization and laying of the filling area are as follows: the bottom layer is paved with cobblestones, and the particle size of the cobblestones is 1-2cm, and the height is about 5-8cm; The height is about 25-30cm; then the particle size of high-grade volcanic rock is 5mm, and the filling height is 15-20cm; then add uniform fine zeolite with a particle size of 3-5mm, and the layer height is controlled at 10-15cm; artificial wetland The environmental parameters and internal physical and chemical parameters of the device 21 are as follows: the light intensity is 4000Lux, controlled by the light intensity sensor 15, the temperature is 20±1°C, realized by the heatable...

Embodiment 3

[0070] The emergent plant 1 is selected from evergreen cattails in four seasons, and the submerged plant 2 is selected from Elodea that grows well in winter; Bacteria composition; the optimization and laying of the filler area are as follows: the bottom layer is bedding pebbles, and the particle diameter of the pebbles is 1-2cm, and the height is about 5-8cm; 8mm, the laying height is about 25-30cm; then fill with steel slag particles, the particle size of steel slag particles is 5mm, and the filling height is 15-20cm; then fill with shale ceramsite, the particle size of shale ceramsite is 5mm, and the filling height is 15cm -20cm; the environmental parameters of the constructed wetland device 21 and the internal physical and chemical parameters of the device are as follows: the light intensity is 4000Lux, controlled by the light intensity sensor 15, the temperature is 20±1°C, realized by the heatable water reservoir 13 and the temperature sensor, and the pH is stable Between ...

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Abstract

The invention discloses an artificial wetland device for denitrification of low-pollution water and a treatment method thereof. The artificial wetland device for denitrification of low-pollution water comprises a constant-flow pump, an intake zone, a main body reaction zone and an outlet zone, wherein the low-pollution water is pumped into the intake zone through the constant-flow pump; an inlet hole and an intake valve are arranged in the intake zone; an outlet hole and an outlet valve are arranged in the outlet zone; a vertical upward hierarchical packing zone is arranged inside the main body reaction zone; a four-season evergreen aquatic plant is planted above the packing zone; denitrifying microbial liquid and a nutrient solution are arranged inside the main body reaction zone. By adopting the artificial wetland device, the effects of the artificial wetland in the aspect of denitrification treatment and three aspects of the plant, matrix and microorganisms are fully intensified, the denitrifying microbial liquid is prepared by screening denitrification superiority strains in the stable wetland, applied to the artificial wetland device, and matched with preferable winter evergreen aquatic plant, so as to intensify the denitrification efficiency of the low-pollution water by the artificial wetland and keep the stability in autumn and winter.

Description

technical field [0001] The invention belongs to the technical field of water treatment engineering, and in particular relates to an artificial wetland device for denitrification of low-pollution water and a treatment method thereof. Background technique [0002] In recent years, with the development of industrial and agricultural production and the intensification of human activities, some lakes in my country have shown eutrophication, and ammonia nitrogen and total nitrogen have exceeded the standard, seriously affecting the ecological security of the water environment and the health of the population. Therefore, the control of nitrogen pollution in lake water is imminent. Among them, the denitrification treatment of low-pollution water has become a new requirement for lake water pollution control in recent years. [0003] Low-pollution water mainly includes tail water discharged from sewage treatment plants. Although these tail waters can meet the standard of urban sewage...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/32
CPCY02W10/10
Inventor 李正魁张万广王晶晶韩华杨朱倩
Owner NANJING UNIV
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