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Heterotrophic nitrification-aerobic denitrification biological treatment method of nitrogen-containing wastewater and device thereof

A technology of aerobic denitrification and aerobic denitrifying bacteria, which is applied in the field of environmental engineering, can solve the problems of inability to heterotrophic nitrification and efficient denitrification of aerobic denitrifying bacteria, and achieve strong load impact resistance and high denitrification efficiency Effect

Pending Publication Date: 2017-09-26
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the above-mentioned prior art that heterotrophic nitrification-aerobic denitrification bacteria cannot be used for efficient denitrification, and to provide a kind of heterotrophic nitrification-aerobic denitrification biological treatment of nitrogen-containing wastewater method

Method used

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  • Heterotrophic nitrification-aerobic denitrification biological treatment method of nitrogen-containing wastewater and device thereof
  • Heterotrophic nitrification-aerobic denitrification biological treatment method of nitrogen-containing wastewater and device thereof
  • Heterotrophic nitrification-aerobic denitrification biological treatment method of nitrogen-containing wastewater and device thereof

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Embodiment 1

[0035] A heterotrophic nitrification-aerobic denitrification biological treatment device for nitrogen-containing wastewater, comprising a first reaction pool 1 and a second reaction pool 2 connected to each other; the lower part of the first reaction pool 1 is provided with a water inlet 11, the second A first membrane filtration unit 3 is arranged at the place where the first reaction tank 1 and the second reaction tank 2 communicate with each other; the second reaction tank 2 is separated by a baffle plate 4 into a baffle area 5 and heterotrophic nitrification-aerobic denitrification Zone 6; the bottom of the heterotrophic nitrification-aerobic denitrification zone 6 is provided with an aeration system 61, and the upper part is provided with a three-phase separator 62 and a water outlet 63, and the position of the water outlet 63 is higher than the three-phase separator 62; The heterotrophic nitrification-aerobic denitrification zone 6 is also provided with a second membrane ...

Embodiment 2

[0048] A heterotrophic nitrification-aerobic denitrification biological treatment device for nitrogenous waste water, its structure is basically the same as that of Example 1; wherein:

[0049] The membrane pore diameter of the first membrane filtration unit 3 is 0.6 μm, and the membrane pore diameter of the second membrane filtration unit 64 is 0.5 μm.

[0050] The MLSS of the sequencing batch bioreactor 1 is 3310mg / L, a cycle is 24h, the operating temperature is 25°C, the MLSS of the heterotrophic nitrification-aerobic denitrification zone 6 is 2120mg / L, the operating temperature is 25°C, and the dissolved oxygen is at 5.0~7.0mg / L, C / N ratio 8, pH range 7~10, surface loading rate 0.85m 3 / m 2 .h.

[0051] For livestock and poultry breeding wastewater, the scale is 50m 3 / d, the processing result is as follows:

[0052]

[0053] It can be seen that the above-mentioned heterotrophic nitrification-aerobic denitrification biological treatment device and reaction condition...

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Abstract

The invention discloses a heterotrophic nitrification-aerobic denitrification biological treatment method of nitrogen-containing wastewater and a device thereof. The method comprises the following steps: firstly filtering microorganisms in the nitrogen-containing wastewater, carrying out biological denitrification of the filtered wastewater by using heterotrophic nitrification-aerobic denitrification bacteria, filtering the treated wastewater again and then discharging the wastewater. The device comprises a first reaction tank and a second reaction tank which are interconnected with each other, wherein a water inlet is formed in the lower part of the first reaction tank; a first membrane filtration unit is arranged at an interconnection part between the first reaction tank and the second reaction tank; the second reaction tank is isolated into a baffling area and a heterotrophic nitrification-aerobic denitrification area by a baffling plate; an aeration system is arranged at the bottom of the heterotrophic nitrification-aerobic denitrification area; a three-phase separator and a water outlet are arranged at the upper part of the heterotrophic nitrification-aerobic denitrification area; the position of the water outlet is higher than that of the three-phase separator. Through the device, the efficient denitrification performance of the heterotrophic nitrification-aerobic denitrification bacteria is fully exerted; the device has the advantages of small occupied area, high denitrification efficiency, high resistance to load impact and no sludge expansion.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering. More specifically, it relates to a heterotrophic nitrification-aerobic denitrification biological treatment method and device for nitrogenous wastewater. Background technique [0002] With the increase of population and the rapid development of industry and agriculture, nitrogen pollution in water is becoming more and more serious. On the one hand, nitrogen pollution causes water eutrophication, on the other hand, it also has serious harm to aquatic organisms and human health. Therefore, the treatment of nitrogen pollution in wastewater has become an urgent requirement. [0003] At present, there are mainly physical, chemical and biological methods for the treatment of nitrogen pollution in wastewater at home and abroad. Since biological nitrogen removal can convert inorganic nitrogen into N 2 , and the feasibility and economy are better than other denitrification methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F2209/08C02F2209/10C02F2209/14C02F2209/16C02F3/00C02F3/301C02F1/44
Inventor 曹刚陈海升莫测辉张迪黄郑郑
Owner JINAN UNIVERSITY
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