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Denitrification method of ammonia-nitrogen wastewater and microbial desalination tank

A technology for ammonia nitrogen wastewater and microorganisms, which is applied in the fields of water pollutants, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of adding a large number of chemical agents, and achieve the effect of efficient removal

Inactive Publication Date: 2017-05-10
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, according to the existing technical solutions, although the breakpoint chlorination method and the magnesium ammonium phosphate crystallization method can recover the ammonia nitrogen in the ammonia nitrogen wastewater to a certain extent, they need to add a large amount of chemical agents

Method used

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  • Denitrification method of ammonia-nitrogen wastewater and microbial desalination tank

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Effect test

Embodiment 1

[0057] Take 1L of fertilizer wastewater with an ammonia nitrogen concentration of 289mg / L as the experimental sample, and enter the desalination chamber of the microbial desalination tank; add crushed human feces and water to the anode chamber of the microbial desalination tank according to the volume ratio of 1:1 as fuel; 0.066mol / L of KH 2 PO 4 and K of 0.035mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination cell as a buffer. When the hydraulic retention time is 6h, the concentration of ammonia nitrogen in the effluent water of the final desalination chamber is 20.2 mg / L, corresponding to a recovery rate of 93%, and the daily production capacity of the microbial desalination tank is about 3×10 -6 Spend.

Embodiment 2

[0059] Take 1L of aquaculture wastewater with an ammonia nitrogen concentration of 582mg / L as the experimental sample, and enter the desalination chamber of the microbial desalination tank; add the crushed human feces and water to the anode chamber of the microbial desalination tank according to the volume ratio of 0.9:1 as fuel; 0.036mol / L of KH 2 PO 4 and K of 0.025mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination cell as a buffer. When the hydraulic retention time is 6 hours, the concentration of ammonia nitrogen in the effluent of the final desalination chamber is 58.2mg / L, the corresponding recovery rate is 90%, and the daily production capacity of the microbial desalination pond is about 4×10 -6 Spend.

Embodiment 3

[0061] Take 1L of human urine with an ammonia nitrogen concentration of 375mg / L as the experimental sample, and enter the desalination chamber of the microbial desalination pool; add the crushed human feces and water to the anode chamber of the microbial desalination pool according to the volume ratio of 1.1:1 as fuel ; The KH of 0.05mol / L 2 PO 4 and K of 0.05mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination chamber as a buffer. When the hydraulic retention time is 6h, the concentration of ammonia nitrogen in the effluent of the final desalination chamber is 39 mg / L, the corresponding recovery rate is 92%, and the daily production capacity of the microbial desalination tank is about 4×10 -6 Spend.

[0062] It can be known from the above examples that the present invention provides a method for denitrification of ammonia nitrogen wastewater and a microbial desalination tank. The microbial desalination pool provided by the present inv...

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Abstract

The invention provides a denitrification method of ammonia-nitrogen wastewater and a microbial desalination tank. The microbial desalination tank comprises a shell, an outer circuit, an anode chamber, a cathode chamber and a desalination chamber, wherein the anode chamber, the cathode chamber and the desalination chamber are arranged in the shell. The denitrification method includes: adding human manure liquid into the anode chamber inoculated with anaerobic sludge; adding phosphate buffer into the cathode chamber; allowing the ammonia-nitrogen wastewater to enter the microbial desalination tank from the desalination chamber so as to remove ammonia and nitrogen. The denitrification method using the ammonia-nitrogen wastewater has the advantages that the ammonia and the nitrogen can be removed efficiently by adding a small amount of phosphate buffer, electric energy generated in an electrochemical system can also be recycled during denitrification, and the removing rate of the ammonia and the nitrogen in the ammonia-nitrogen wastewater reaches up to 93%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for denitrification of ammonia nitrogen wastewater and a microbial desalination pool. Background technique [0002] Ammonia nitrogen refers to the free ammonia (NH 3 ) and ammonium ions (NH 4 + ) in the form of nitrogen. Ammonia nitrogen is a nutrient in water, which can lead to eutrophication. It is the main oxygen-consuming pollutant in water and is poisonous to fish and some aquatic organisms. Ammonia nitrogen in water can be converted into nitrite under certain conditions. If consumed for a long time, nitrite in water will combine with protein to form nitrosamine, which is a strong carcinogen and extremely harmful to human health. Therefore, before the wastewater is discharged, it is generally necessary to denitrify the wastewater. [0003] Breakpoint chlorination method and ammonium magnesium phosphate crystallization method are relatively commonly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/28C02F101/16
CPCC02F3/005C02F3/2813C02F3/2866C02F2101/16C02F2303/10
Inventor 张宝刚杨盟李家欣李云龙
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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