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Nitrosation-anaerobic ammonia oxidation treatment device for city sewage and method

A technology for anaerobic ammonium oxidation and urban sewage, which is applied in the field of trickling filter nitrification-anaerobic nitrification urban sewage high-efficiency denitrification device, can solve the problems of inability to achieve biomass accumulation and stable denitrification, reduced denitrification efficiency, and inability to Realize the discharge of urban sewage up to standard and achieve the effects of ensuring continuous and stable operation, saving operating costs and being easy to control

Inactive Publication Date: 2019-09-10
SHENZHEN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] It can be found from the existing research that no matter the cultivation method of biofilm or granular sludge is adopted, the denitrification efficiency of the nitrification-Anammox system decreases significantly with the decrease of the concentration of ammonia nitrogen in the influent. Optimizing the operating conditions of the process can only reduce the Nitrogen efficiency is increased from 50% to 60% to 70% to 80%, and the discharge of urban sewage cannot be achieved; and under long-term operating conditions, both biofilm and granular sludge will gradually disintegrate, and biomass accumulation cannot be achieved and stable denitrification

Method used

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  • Nitrosation-anaerobic ammonia oxidation treatment device for city sewage and method
  • Nitrosation-anaerobic ammonia oxidation treatment device for city sewage and method
  • Nitrosation-anaerobic ammonia oxidation treatment device for city sewage and method

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Embodiment 1

[0033] This embodiment relates to a nitrosation-ANAMMOX treatment device for urban sewage, and its structural schematic diagram is as follows figure 1 As shown, its cross-section is shown in figure 2 Shown:

[0034] Including the nitrosation reaction pool 2 and the anammox reaction pool 3 stacked up and down, the nitrosation reaction pool 2 and the anammox reaction pool 3 are connected by setting a baffle plate with a small hole (aperture 1.0mm), so The top of the nitrosation reaction tank is provided with a water inlet 1 and an air outlet 12, the wall of the nitrosation reaction tank is provided with an online DO monitoring device 6, and the bottom of the nitrosation reaction tank is provided with an aeration ring 7, The aeration ring 7 is connected to the gas flow meter 9 and the air pump 10, and the nitrosation reaction tank is filled with vermiculite, and the surface of the vermiculite has nitrosative bacteria growing in a film shape;

[0035] The wall of the anammox re...

Embodiment 2

[0038] Compared with Example 1, the difference is that the particle size of the vermiculite in the nitrosation reaction tank is 2.0-5.0 mm, and the particle size of the vermiculite in the anammox reaction tank is 2.0-5.0 mm. The amount of vermiculite added in the nitrosation reaction pool is 75% to 80% of the volume of the reaction pool, and the amount of vermiculite added in the anaerobic oxidation reaction pool is 75% to 80% of the volume of the reaction pool.

Embodiment 3

[0040] This embodiment relates to a treatment method for urban sewage. The concentration of ammonia nitrogen in the treated sewage is (30 ± 10) mg / L, and the concentration of COD in the influent is (30 ± 10) mg / L, including the following steps:

[0041] Select the device described in Example 2 to treat the sewage, control the dissolved oxygen in the nitrosation reaction tank to be 0.5 to 1.0 mg / L, and pass the treated sewage into the anammox reaction after the nitrosation reaction is completed. tank, adjust the pH in the anaerobic ammonium oxidation reaction tank to 7.0-7.8, the purified water obtained after the reaction is completed is discharged from the anaerobic ammonium oxidation reaction tank, and the hydraulic retention time of the sewage in the system is controlled to be 3-6h. The device and method of the invention can realize stable treatment of more than 180 days, the ammonia nitrogen in the effluent is 2.55-6.25 mg / L, and the COD is 28.5-37.5 mg / L.

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Abstract

The invention relates to a nitrosation-anaerobic ammonia oxidation treatment device for city sewage and a method. The device comprises a nitrosation reaction tank and an anaerobic ammonia oxidation reaction tank, wherein the nitrosation reaction tank is filled with vermiculite; nitrifying bacteria are in biofilm culturing growth on the surface of the vermiculite; the anaerobic ammonia oxidation reaction tank is filled with vermiculite; and anaerobic ammonium oxidation bacteria are in biofilm culturing growth on the surface of the vermiculite. By adopting the device provided by the invention, the vermiculite on which microorganisms are in biofilm culturing growth is arranged in the reaction tanks, so that treatment activity of the microorganisms upon wastewater can be effectively improved,and the denitrification performance of a nitrosation-Anammox process upon low ammonia nitrogen city sewage can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of urban wastewater treatment, and in particular relates to a trickle filter type nitritation-anaerobic nitriding urban sewage efficient denitrification device and method using vermiculite as a microbial growth carrier. Background technique [0002] Nitrosation-anammox (Anammox) process has the advantages of saving 25% aeration energy consumption, 100% organic carbon source, and less residual sludge compared with traditional biological denitrification process. Low energy consumption and sustainable denitrification are possible. [0003] The nitrosation-Anammox process is more suitable for the treatment of high ammonia nitrogen wastewater such as chemical fertilizers and monosodium glutamate processing because the main functional bacteria (nitrosative bacteria AOB and anaerobic ammox bacteria AnAOB) have high requirements for ammonia nitrogen concentration, but it is more suitable for the treatment of low amm...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/28C02F101/16
CPCC02F3/28C02F3/302C02F3/307C02F2101/16C02F2209/06C02F2209/22
Inventor 孙世昌马睿林俊豪张培新
Owner SHENZHEN UNIV
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