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Apparatus for treating municipal sewage by using partial nitrosation-anaerobic ammonia oxidation process, and method thereof

A technology of anammox and anammox bacteria, applied in aerobic and anaerobic process treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve unstable, slow, anammox operation Difficulty in the process of enrichment and cultivation of bacteria, etc., to achieve the effect of high-efficiency whole-process autotrophic biological denitrification

Pending Publication Date: 2020-02-11
NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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AI Technical Summary

Problems solved by technology

For the case where there is no side stream process system to provide anammox bacteria species, due to the competitive growth of NOB, the enrichment and cultivation process of anammox bacteria is very difficult and slow, and it is difficult to start PN / System A, resulting in problems such as high concentration of nitrate nitrogen in the system effluent and unstable operation

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  • Apparatus for treating municipal sewage by using partial nitrosation-anaerobic ammonia oxidation process, and method thereof

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specific Embodiment approach

[0029] A device for treating urban sewage by partial nitritation-anammox process, which is composed of an anammox bacteria enrichment and cultivation device and a continuous flow PN / A autotrophic biological denitrification device. In the anaerobic ammox bacteria enrichment and cultivation device, the material is obtained locally, and the effluent of the urban sewage treatment plant is used to enrich and cultivate the carrier biofilm with anammox activity; in the PN / A autotrophic biological denitrification device, the common nitrification Sludge, after gradually increasing the AOB activity through appropriate control strategies, put the anaerobic ammonium oxidation carrier biofilm with high activity in the enrichment cultivation device into the PN / A biological denitrification device, through "sludge first, membrane later" The startup method quickly establishes a stable partial nitritation / anammox autotrophic nitrogen removal system.

[0030] 1. The anammox bacteria enrichment c...

specific Embodiment 1

[0047] Specific embodiment one: adopt the secondary treatment effluent of Tianjin Economic and Technological Development Zone West District Sewage Treatment Plant as the influent of the enrichment cultivation device, add ammonium chloride and sodium nitrite in the influent, and the initial ammonia nitrogen and nitrite nitrogen concentration is 20 -30mg / L. The effective volume of the enrichment cultivation device is 600L, loaded with 300L plastic carrier, and inoculated with 10L of anammox bacteria sludge cultivated in the laboratory. According to steps b, c, and d, after 120 days, the concentration of ammonia nitrogen and nitrite nitrogen in the influent gradually increased to 100-120mg / L, the total nitrogen in the influent was 216.3±30.5mg / L, and the total nitrogen removal rate was 82.3%. The nitrogen removal rate on the carrier membrane surface reaches 1.56gN / m 2 / d.

specific Embodiment 2

[0048]Specific embodiment two: adopt Tianjin Economic and Technological Development Zone Beitang Sewage Treatment Plant secondary treatment effluent as enrichment cultivation device feed water, add ammonium chloride and sodium nitrite in feed water, initial ammonia nitrogen and nitrite nitrogen concentration are 20-30mg / L. The effective volume of the enrichment cultivation device is 1.6m 3 , load a 700L plastic carrier, and inoculate the mature 70L anammox bacteria carrier cultivated in the enrichment and cultivation device of the West District Sewage Treatment Plant described in Example 1. According to steps b, c, and d, after 90 days, the total nitrogen in the influent increased to 417.5±29.0mg / L, the total nitrogen removal rate was 81.8%, and the carrier membrane surface nitrogen removal rate reached 2.00gN / m 2 / d.

[0049] The effective volume of the test PN / A reactor is 160L. The test influent is the effluent from the aeration grit chamber of the Beitang sewage treatmen...

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Abstract

An apparatus for treating municipal sewage by using a partial nitrosation-anaerobic ammonia oxidation process is composed of an anaerobic ammonia-oxidizing bacterium enriching and culturing device anda continuous flow PN / A autotrophic biological denitrification device. The anaerobic ammonia-oxidizing bacterium enriching and culturing device comprises a water distribution tank, a liquid medicine barrel, an enriching and culturing reactor and a control system, the continuous flow PN / A autotrophic biological denitrification device comprises a water inlet pump, a PN / A reactor, a sedimentation tank, a sludge reflux pump and a sludge discharge pump, the water inlet pump pumps municipal sewage subjected to carbon removal pretreatment, an aeration device is arranged at the bottom of the PN / A reactor, the air pipe of the aeration device is connected with an air blower, the inlet of the PN / A reactor is connected with the water inlet pump, the outlet of the PN / A reactor is connected with the inlet of the sedimentation tank, a sludge discharge pipe at the bottom of the sedimentation tank is respectively connected with the sludge discharge pump and the sludge reflux pump, and a pipeline for connecting the sludge discharge pipe with the sludge reflux pump is connected to a pipeline for connecting the water inlet pump with the PN / A reactor. The apparatus has the advantages of high starting speed, low effluent nitrate concentration, stability in operation, and suitableness for biological denitrification of municipal sewage.

Description

technical field [0001] The invention relates to the technical field of urban sewage treatment, in particular to a device and method for treating urban sewage by using a partial nitrosation-anammox process for biological denitrification of urban sewage. Background technique [0002] Anaerobic ammonium oxidation is known as one of the most amazing environmental biotechnologies. Since the discovery of anaerobic ammonium oxidation in the 1990s, the research on its application in sewage treatment has increasingly become a hot spot. Anammox bacteria are a type of autotrophic plantain fungi that can oxidize ammonia to nitrogen using nitrite as an electron acceptor. The effective combination of the functions of aerobic ammonia oxidizing bacteria (AOB) and anammox bacteria can realize the whole process of autotrophic biological denitrification of sewage. This process is called partial nitrosation-anammox (PN / A) Biological denitrification process. Compared with the traditional nitri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/301C02F2101/16
Inventor 陶润先吴凡松郑兴灿郭兴芳李劢
Owner NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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