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Method for promoting wall-adhering growth of anaerobic ammonia oxidation sludge

A technology of anaerobic ammonium oxidation and sludge, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as easy shedding, instability, poor effect, etc. The time is fast, the solution is difficult to hang the film, and the effect of maintaining long-term high efficiency and stability

Pending Publication Date: 2022-05-13
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of Anammox sludge film-hanging process, such as poor effect, instability, and easy shedding, and provides a method for promoting the growth of anaerobic ammonium oxidation sludge.

Method used

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  • Method for promoting wall-adhering growth of anaerobic ammonia oxidation sludge
  • Method for promoting wall-adhering growth of anaerobic ammonia oxidation sludge
  • Method for promoting wall-adhering growth of anaerobic ammonia oxidation sludge

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0016] Specific implementation mode one: the method for promoting the adherent growth of anaerobic ammox sludge in this implementation mode is as follows:

[0017] Reduce the operating temperature of Anammox-EGSB that has been operating normally to 20±1°C, and run at a constant temperature for ≥10 days; then reduce the operating temperature to 12±1°C, and run at a constant temperature for ≥10 days; then increase the operating temperature to the normal operating Anammox- The operating temperature of EGSB, when the total nitrogen removal effect of the effluent returns to normal, the growth of anaerobic ammonium oxidation sludge will be completed.

[0018] In this embodiment, the constant temperature operation of Anammox-EGSB is controlled through the circulation of cold water or hot water in the water bath layer and connection with the constant temperature water tank.

[0019] In this embodiment, the pH value of Anammox-EGSB influent is regulated with 0.1M hydrochloric acid.

...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the operating temperature of the Anammox-EGSB that has been in normal operation is 30-35°C. Other parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that: Anammox-EGSB influent NH 4 + -N and NO 2 - The molar ratio of -N is 1:1.15. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for promoting adherent growth of anaerobic ammonia oxidation sludge, and relates to an adherent growth method of anaerobic ammonia oxidation granular sludge. The method comprises the following steps: reducing the operating temperature of the Anammox-EGSB which is normally operated to 20 + / -1 DEG C, and operating at constant temperature for more than or equal to 10 days; then reducing the operating temperature to 12 + / -1 DEG C, and operating at constant temperature for more than or equal to 10 days; then the operating temperature is increased to the operating temperature of the Anammox-EGSB in normal operation, and when the total nitrogen removal effect of the effluent returns to normal, the wall-adhering growth of the anaerobic ammonia oxidation sludge is completed. According to the method, no other chemical reagent needs to be added, the problem that anaerobic ammonium oxidation bacteria are difficult to form a film can be effectively solved only through low-temperature stimulation, and long-term high efficiency and stability of a denitrification system are maintained. According to the method, the membrane forming time is short, the whole process can be completed within one month, the treatment effect is stable and efficient, the formed membrane system is high in hydraulic shear force resistance, and the removal rate of ammonia nitrogen and nitrite reaches 95% or above.

Description

technical field [0001] The invention relates to a wall-attached growth method of anaerobic ammonia oxidation granular sludge. Background technique [0002] Controlling the discharge of nitrogen and phosphorus in sewage is an effective means to control water eutrophication. The nitrification-denitrification biological denitrification system with a long history has many problems, such as long process, low denitrification efficiency, high infrastructure investment, high energy consumption for oxygen supply, and the need to add additional organic carbon sources, which is increasingly incompatible with the new century. The development trend of energy saving and emission reduction. The new biological denitrification technology is developing rapidly. Among them, the anammox (anaerobic ammonia oxidation) process is a biological denitrification process in which nitrite nitrogen is used as an electron acceptor, and ammonia is oxidized under anaerobic conditions to produce nitrogen a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F101/16
CPCC02F3/2853C02F1/66C02F2101/16
Inventor 王小龙黄佳路齐志强马赛赵欣语康瑞琴王春艳
Owner ANYANG INST OF TECH
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