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Culture method of AOB-ANAMMOX granular sludge

A technology of granular sludge and cultivation method, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problem of unsatisfactory denitrification effect of domestic sewage and insufficient nitrite nitrogen content. Satisfy other problems, achieve good settlement performance, strong resistance to hydraulic shock

Active Publication Date: 2015-01-07
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the content of nitrite nitrogen in the actual domestic sewage in the existing sewage treatment cannot satisfy the autotrophic denitrification of ANAMMOX bacteria, resulting in unsatisfactory denitrification effect of domestic sewage, and provides a kind of AOB-ANAMMOX particles Sludge cultivation method

Method used

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  • Culture method of AOB-ANAMMOX granular sludge
  • Culture method of AOB-ANAMMOX granular sludge
  • Culture method of AOB-ANAMMOX granular sludge

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specific Embodiment approach 1

[0030] Specific implementation mode one: combine figure 1 Describe this embodiment, the AOB-ANAMMOX granular sludge of this embodiment is cultivated according to the following steps:

[0031] 1. Add ANAMMOX granular sludge into the EGSB reactor, and then feed nitrogen-containing simulated wastewater, and aerate the nitrogen-containing simulated wastewater with nitrogen to gradually reduce the dissolved oxygen concentration of the influent to 1.0mg / L within 24 hours; at a temperature of 33±2 ℃, the hydraulic retention time is 2.3h, and the rising flow rate in the EGSB reactor is 7m / h, cultivated for 26-28 days;

[0032] 2. Perform micro-oxygen aeration on nitrogen-containing simulated wastewater entering the EGSB reactor, and control the dissolved oxygen concentration to 1.2±0.3mg / L; at a temperature of 33±2°C and a hydraulic retention time of 2.3h, the rise in the EGSB reactor Cultivate for 41 to 43 days under the condition of a flow rate of 7m / h;

[0033] 3. Perform micro-...

specific Embodiment approach 2

[0044] Specific embodiment two: the difference between this embodiment and specific embodiment one is: NH in nitrogen-containing simulated wastewater 4 The concentration of Cl is 97.5~900mg / L, NaNO 2 The concentration is 127.7~1352mg / L, KHCO 3 The concentration is 1000mg / L, KH 2 PO 4 The concentration is 50mg / L, MgSO 4 ·7H 2 The concentration of O is 200mg / L, CaCl 2 2H 2 The concentration of O is 151mg / L, the concentration of vitamins is 0.25ml / L, and the concentration of trace elements is 0.31ml / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0045] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the effective volume of EGSB reactor 4 in step one is 1.53L, and the volume of reaction zone is 1L, and the volume of precipitation zone is 0.53L, anaerobic ammonia The amount of oxidized granular sludge added is 200-300mL. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a culture method of granular sludge, particularly a culture method of AOB-ANAMMOX granular sludge. The method solves the problem of unideal denitrification effect on domestic sewage since the nitrite nitrogen content in actual domestic sewage can not satisfy the autotrophy denitrification of the ANAMMOX bacteria in the existing sewage treatment. The culture method comprises the following steps: 1. adding ANAMMOX granular sludge, and introducing nitrogenous simulated wastewater; 2. carrying out microaerophillic aeration culture; 3. changing the water inlet condition; and 4. carrying out intermittent microaerophillic aeration culture to obtain the AOB-ANAMMOX granular sludge. The AOB-ANAMMOX granular sludge lowers the aeration quantity, saves the organic carbon source and the like in the use process. The culture method is suitable for the field of sewage treatment.

Description

technical field [0001] The invention relates to a method for cultivating granular sludge. Background technique [0002] Water is an irreplaceable resource necessary for human beings and one of the important pillars for the sustainable development of society. In recent years, my country's urbanization process has developed rapidly, and along with the rapid development of industrialization, people's demand for water has increased. However, water pollution incidents have occurred frequently, such as the outbreak of blue-green algae in Taihu Lake, etc., which has changed the supply of water resources. more tense. Among them, the problem of eutrophication of water body due to excessive discharge of nitrogen and phosphorus is particularly prominent. [0003] The discovery of Anammox bacteria makes autotrophic nitrogen removal technology possible. ANAMMOX bacteria use nitrite as an electron acceptor to oxidize ammonia nitrogen, use inorganic carbon as a carbon source, and do not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 高大文丛岩黄晓丽王小龙
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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