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A method for improving the impact resistance of anaerobic ammonia oxidation particles

A technology of anaerobic ammonium oxidation and shock capacity, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Particle settling performance becomes worse and other problems, to achieve good stability and settling performance, improve stability and settling capacity, and achieve the effect of good settling performance

Active Publication Date: 2021-09-17
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Normally, the higher the amount of AHLs signal molecules released by the particles, the better for the sludge to maintain a good granulation structure and excellent sedimentation performance. Inhibiting the release of AHLs signal molecules will lead to poor sedimentation performance of the particles, or even disintegration and loss. [6]
Although related reports [1] It has been pointed out that high-concentration total nitrogen shock causes ANAMMOX particles to excessively release loosely bound extracellular polymers (LB-EPS). LB-EPS is a key factor determining particle stability and sedimentation performance. The denitrification performance of the system is unstable, but the mechanism of excessive release of LB-EPS from ANAMMOX particles under matrix impact has not been explored and studied

Method used

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  • A method for improving the impact resistance of anaerobic ammonia oxidation particles
  • A method for improving the impact resistance of anaerobic ammonia oxidation particles
  • A method for improving the impact resistance of anaerobic ammonia oxidation particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Effects of different concentrations of porcine kidney acylase I on particle stability, sedimentation performance and denitrification performance of UASB reactor under impact of matrix

[0046] Two sets of UASB reactors were set up, and after inoculation with low-load ANAMMOX granular sludge, the continuous flow experiment (divided into 5 stages) was carried out. During the stable operation period (stage I and stage II), the concentration of substrate total nitrogen (TN) increased from 122mg / L to 340mg / L, HRT remained unchanged for 2.3h, and the total nitrogen loading rate (NLR) increased from 1.3kg / (m 3 ·d) increased to 3.5kg / (m 3 d), and then perform 24 hours of 1500-2500mg / L high-concentration TN impact, one group of UASB reactors without inhibitors, as a blank control group; Add 0.1mg / L, 0.5mg / L, 1.0mg / L, 1.5mg / L and 1.5g / L porcine kidney acylase I until the end of the shock. Afterwards, the concentration of substrate TN was reduced to 307mg / L (stage III), 143mg / L ...

Embodiment 2

[0048] Embodiment 2 (i.e. comparative example):

[0049] Effects of different concentrations of vanillin on particle stability, settling performance and denitrification performance of UASB reactor under impact of matrix

[0050]Investigate the influence of different concentrations (0.1mg / L, 0.5mg / L, 1.0mg / L, 1.5mg / L, 1.5g / L) of vanillin on particle stability and sedimentation performance under matrix impact, the experimental operation steps are the same as

[0051] Example 1.

Embodiment 3

[0053] Effect of Adding Lower Concentration of Porcine Kidney Acylase I on the Activity of Granules Under Substrate Impact

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Abstract

The invention discloses a method for improving the matrix impact resistance of anaerobic ammonium oxidation particles, which belongs to the field of wastewater treatment. During the matrix shocking period of the ANAMMOX reactor in stable operation, 1500-2500 mg / L total nitrogen shock was performed for 12-48 hours, and 0.1 mg / L-1.5 g / L porcine kidney acylase I was added to the reactor every 1 hour until the matrix The impact is over; AHLs inhibitor porcine kidney acylase I will no longer be added to the reactor after the matrix impact is stopped. The present invention suppresses the activity of the quorum sensing system of the ANAMMOX particles under the impact of the matrix by adding a lower concentration of AHLs inhibitor porcine kidney acylase I, thereby reducing the release amount of the granular AHLs to control the excessive release of LB-EPS, and improving the granule under the impact of the matrix. stability and settling capacity. At the same time, when the inhibitor concentration is low, it will not adversely affect the particle activity.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to an anammox denitrification technology in the waste water treatment process, and in particular to a method for improving the impact resistance of anammox granules. Background technique [0002] Anaerobic ammonium oxidation (ANAMMOX), as a new biological denitrification process, has many advantages such as low energy consumption, low operating cost and high denitrification efficiency. However, the doubling time of ANAMMOX bacteria is long, the cell yield is low, and it is highly sensitive to environmental changes. For example, the impact of the matrix will deteriorate the performance of ANAMMOX particles, and the concentration of suspended solids (SS) in the effluent will increase, resulting in unstable reactor performance, which limits ANAMMOX. Wide application of technology. Research by Zhang et al. [1] It shows that the 24-hour high-concentration total nitrogen shock will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 李军张晶周荣煊张亚超王秀杰梁东博侯连刚
Owner BEIJING UNIV OF TECH
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