Enhanced denitrification artificial wetland system using solar energy
A constructed wetland system and constructed wetland technology, applied in the field of sewage treatment, can solve the problems of insufficient electron donors, inability to meet microorganisms, affecting the total nitrogen in effluent, etc., and achieve the effect of overcoming the shortage of electron donors and reducing energy consumption.
Inactive Publication Date: 2019-02-01
TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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Problems solved by technology
The latter two effects are relatively obvious, but sufficient oxygen supply is a necessary condition for microorganisms to carry out nitrification. However, the oxygen in constructed wetlands mainly depends on plant transport and atmospheric reoxygenation, which cannot meet the needs of microorganisms in actual operation.
In addition, low carbon-to-nitrogen ratios are common in domestic sewage, which can easily lead to insufficient electron donors required for the denitrification process, affecting the total nitrogen in the effluent.
Method used
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[0021] Example: The sewage enters from the water inlet 2, enters the artificial wetland 1 in the aeration section through the water distribution system 3, and the ammonia nitrogen in the sewage is quickly fixed on the matrix of the first packing layer 4 through ion exchange and adsorption, and then attached to the The nitrifying bacteria on the matrix in the first packing layer 4 are converted into nitrate nitrogen, and the aeration equipment 7 delivers air to the water through the main air supply pipe 8 and the air supply branch pipe 9, which can provide sufficient oxygen for the nitrifying bacteria to make them more efficient. Efficiently oxidize ammonia nitrogen into nitrate nitrogen. During operation, the gas supply of each gas supply branch pipe 9 can be controlled through the valve 10 according to the concentration of ammonia nitrogen in the sewage. In the wetland 11, the solar energy is converted into electric energy by the solar panel 13 and the solar controller 14 and ...
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The invention discloses an enhanced denitrification artificial wetland system using solar energy. The system comprises an aeration section artificial wetland and an electrode enhancement section artificial wetland. The aeration section artificial wetland is provided with a water inlet, a water distribution system, an aeration system and a first filler layer; and the water inlet is disposed at oneside of the water distribution system far away from the electrode enhancement section artificial wetland. The electrode enhancement section artificial wetland is provided with a second filler layer and a water collecting area; and the water collecting area is located at one side of the second filler layer far away from the aeration section artificial wetland. A cathode plate and an anode plate areinstalled inside the second filler layer, and the cathode plate and the anode plate are symmetrically disposed. A storage battery is connected to the top of the cathode plate and the anode plate, andan electrode column of the storage battery is connected with a solar panel. A solar controller is installed between the solar panel and the storage battery. The system has good removal rate of ammonia nitrogen and total nitrogen, and can help improve the control rate of ammonia nitrogen and total nitrogen of the effluent especially in the treatment of sewage with low carbon nitrogen ratio.
Description
technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an enhanced denitrification constructed wetland system utilizing solar energy. Background technique [0002] Constructed wetlands are man-made ecosystems that treat sewage by simulating natural wetland systems. The system is mainly composed of substrates, aquatic plants, and microorganisms. The sewage is filtered through substrates, adsorbed, precipitated, ion exchanged, absorbed by plants, and decomposed by microorganisms to achieve the removal and decomposition of pollutants. Constructed wetland has the advantages of low investment, low operation, easy management, and good landscape compatibility. It has been widely used in domestic sewage treatment, lake and river treatment, advanced wastewater treatment and other fields. Electrode biofilm denitrification technology combines electrochemical and biological methods. The basic principle is that autotrophic denitrifying ...
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Login to View More IPC IPC(8): C02F3/32C02F3/34C02F101/16C02F101/38
CPCC02F3/005C02F3/32C02F3/34C02F2101/16C02F2101/38C02F2201/009C02F2301/08
Inventor 张磊许丹宇石岩
Owner TIANJIN ACADEMY OF ENVIRONMENTAL SCI