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Sewage autotrophic nitrogen removal treatment method and device

A technology of autotrophic denitrification and treatment device, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The operation control process is complicated and other problems, so as to improve the effluent quality, reduce the project investment and operation cost, and achieve the effect of flexible control.

Active Publication Date: 2014-12-10
GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Through the above existing process methods, it can be found that the current short-range nitrification / anammox process for denitrification of sewage is mainly concentrated in high ammonia nitrogen wastewater, and there is a lack of research on domestic sewage with low carbon-to-nitrogen ratio; and the operation control process is relatively complicated and practical. It is more difficult, which is not conducive to the smooth progress of the anammox reaction; in addition, no further treatment measures have been taken for the nitrate nitrogen in the effluent of the anammox

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  • Sewage autotrophic nitrogen removal treatment method and device

Examples

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Embodiment 1

[0036] Example 1 Sewage autotrophic denitrification treatment device

[0037] Such as figure 2 As shown, the present invention provides a kind of urban sewage autotrophic denitrification treatment device, which includes a pre-denitration reactor 1, a short-range nitrification reactor 2, a regulating tank 3, anammox reactor 4; the pre-denitration Reactor 1, short-range nitrification reactor 2, regulating tank 3, and anammox reactor 4 are connected sequentially through the main water inlet pipeline. The outlet water of 1 is introduced into the water inlet branch of the regulating tank 3, and the outlet water of the anaerobic ammonium oxidation reactor 4 can be refluxed to the pre-denitration reactor 1 between the anaerobic ammonium oxidation reactor 4 and the pre-denitration reactor 1 the return line.

[0038] In addition, the pre-denitration reactor 1 is provided with a water inlet pipe 11, a return pipe 44 and a first vent pipe 12, and the short-path nitrification reactor...

Embodiment 2

[0043] Example 2 A treatment method for autotrophic denitrification of sewage

[0044] Get the domestic sewage of Guangzhou urban sewage plant and carry out autotrophic denitrification treatment of the present invention, main water quality index is as follows before processing: CODcr=120mg / L, NH 4 + -N=30mg / L, TN=32mg / L, pH=7.2. to combine figure 1 (Schematic diagram of the process flow of sewage autotrophic denitrification treatment method) and figure 2 (Schematic diagram of sewage autotrophic denitrification device) The treatment process is explained as follows.

[0045] 1) Pre-denitration treatment: During operation, the urban sewage is pretreated by slag removal and then enters the pre-denitration reactor 1 through the water inlet pipe 11 (the total amount of sewage treatment is denoted as Q), and at the same time, the 4 parts of the effluent of the anammox reactor are passed through The reflux pipe 44 is introduced into the pre-denitration reactor 1, and the two ar...

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Abstract

The invention discloses a sewage autotrophic nitrogen removal treatment method and device. The sewage is introduced into a pre-denitration reactor to remove dissolved oxygen; a part of the effluent is introduced into a shortcut nitrification reactor to convert NH4<+>-N into NO2<->-N; the other part of the effluent and the effluent from the shortcut nitrification reactor are simultaneously introduced into an anaerobic ammonia oxidation reactor to carry out anaerobic ammonia oxidation to remove nitrogen; a part of the effluent from the anaerobic ammonia oxidation reactor is discharged outside and the other part of the effluent from the anaerobic ammonia oxidation reactor flows back to the pre-denitration reactor to further remove nitrogen. According to the method and device disclosed by the invention, by combining the shortcut nitrification reactor and the anaerobic ammonia oxidation reactor, the urban sewage is treated, an efficient, low-consumption, low-cost and stable sewage treatment device for treating low-ammonia-nitrogen sewage is provided and the quality of the effluent is far superior to the requirements of national standard level A.

Description

technical field [0001] The invention relates to a sewage autotrophic denitrification treatment method and device. Background technique [0002] With the rapid development of the economy and the continuous expansion of urbanization, the situation of water environment pollution has intensified, and the deterioration of water environment quality has seriously affected people's normal life. With the increasing coverage of urban drainage pipe network and sewage collection rate, improving the effluent quality of urban sewage treatment plants has become an urgent problem to be solved. The existing urban sewage treatment plants still use the traditional full-process biological nitrification / denitrification to remove nitrogen from sewage, which has disadvantages such as low efficiency, high energy and material consumption, and large amount of residual sludge; and with the improvement of people's living standards , the ratio of C / N in sewage is getting lower and lower, and the availa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 隋军李捷徐浩
Owner GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
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