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Photoelectric artificial wetland and application thereof

A constructed wetland and photoelectric technology, applied in the direction of sustainable biological treatment, water pollutants, energy wastewater treatment, etc., can solve the problems of poor nitrogen and phosphorus removal treatment effects, so as to avoid secondary pollution, ensure treatment effect, improve The effect of adsorption capacity of nitrogen and phosphorus

Inactive Publication Date: 2015-12-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a photoelectric constructed wetland to solve the problem that the existing constructed wetland has poor effect on nitrogen and phosphorus removal of sewage

Method used

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  • Photoelectric artificial wetland and application thereof
  • Photoelectric artificial wetland and application thereof
  • Photoelectric artificial wetland and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 As shown in the figure, the simulation device of photovoltaic constructed wetland constructed in the laboratory is composed of a subsurface-flow constructed wetland simulation device and a photovoltaic power supply system. A water inlet is arranged on the side wall of the upper part of the water inlet area of ​​the submerged flow constructed wetland bed, and a water outlet is arranged on the other side wall of the water outlet area of ​​the device. The subsurface constructed wetland contains filler, which is crushed stone and biomass charcoal. The biomass charcoal was prepared by heating reed, calamus and Siberian iris at 600℃ for 2h under the condition of isolated air, and the particle size was 3-10mm, accounting for 50% of the total volume of the filler. Siberian iris and round coin grass are planted above the filling at a planting density of 83 plants / m2 2 .

[0042] A cathode plate and an anode plate are arranged in the submerged flow constructed we...

Embodiment 2

[0045] It is the same as the simulation device of the photovoltaic constructed wetland described in Example 1, the difference is that there are two cathode plates and one anode plate in the submerged flow constructed wetland, and the anode plate is located in the middle of the two cathode plates, that is, the cathode plate. Symmetrically distributed on both sides of the anode plate.

Embodiment 3

[0047] The same as the simulation device of the photovoltaic constructed wetland described in Example 2, the difference is that the volume percentage of biomass carbon filled in the photovoltaic constructed wetland is 25%, the main electrode material of electrolysis is iron, and the electrode between the cathode and anode is iron. The plate spacing is 20cm, the effective height of the electrodes in the constructed wetland is 23cm, the voltage of the photovoltaic panel is 17V; the voltage of the lead-acid battery is 12V, and the current density applied to the electrolysis reaction is 0.232mA / cm 2 ; The area ratio of electrode to treated wetland is 1.725. The hydraulic retention time of sewage in the treatment process is 24h. The experiment was repeated 3 times.

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Abstract

The invention discloses a photoelectric artificial wetland which comprises an underflow artificial wetland and a photovoltaic power supply system, wherein wetland plants are grown on the underflow artificial wetland; a negative plate and a positive plate are arranged inside the underflow artificial wetland; electrolysis, modification and electric-biological catalysis coupled reaction regions are arranged between the negative plate and positive plate; the negative plate and positive plate are connected with the photovoltaic power supply system; and a filler in the underflow artificial wetland comprises macadam and biomass carbon. The invention also discloses application of the photoelectric artificial wetland in the aspect of sewage denitrification and dephosphorization. Compared with the prior art, the photoelectric artificial wetland combines the artificial wetland technique and electrochemical technique with the modified biomass carbon technique, and avoids the problem of secondary pollution of electrolytic ions in the water body on the premise of obviously enhancing the denitrification and dephosphorization effects of the artificial wetland, thereby having very high practical application and popularization values.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a photoelectric constructed wetland and its application. Background technique [0002] Low-pollution water is one of the sources of pollution that causes eutrophication of water bodies, and its governance is an important part of the environmental protection of lakes in my country. Because its water quality index is between the discharge standard of sewage treatment plant and the V standard of surface water, its direct discharge without treatment will greatly increase the load of nutrients such as nitrogen and phosphorus in the receiving water body, thereby causing eutrophication of the water body. [0003] There are nearly 200 sewage treatment plants around Taihu Lake. As one of the low-pollution waters, the tail water of the sewage treatment plants contains high nitrate nitrogen, total phosphorus, ammonia nitrogen, etc., and belongs to the inferior five types of water....

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F101/16
CPCY02W10/37Y02W10/10
Inventor 杨柳燕高燕袁俣王可杨建勋
Owner NANJING UNIV
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