Method for increasing matrix impact resistance of ANAMMOX granules

A technology of anaerobic ammonium oxidation and impact capacity, which is applied in anaerobic digestion treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of unexplored and researched, unstable denitrification performance of the system, and particle settlement Problems such as poor performance, achieve good stability and settlement performance, improve stability and settlement ability, and improve stability and settlement performance

Active Publication Date: 2019-05-17
BEIJING UNIV OF TECH
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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 ...

Method used

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  • Method for increasing matrix impact resistance of ANAMMOX granules
  • Method for increasing matrix impact resistance of ANAMMOX granules
  • Method for increasing matrix impact resistance of ANAMMOX granules

Examples

Experimental program
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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 24h 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 (stage I...

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 increasing the matrix impact resistance of ANAMMOX granules, and belongs to the field of wastewater treatment. The method comprises the following steps: carrying out impact of 1500 to 2500 mg/L of total nitrogen for 12 to 48 hours during a matrix impact period of an ANAMMOX reactor which is in stable running, and adding 0.1 mg/L to 1.5 g/L of pig kidney acylaseI into the reactor every hour until finishing the matrix impact; enabling not to add an AHLs (Acylated Homoserine Lactones) inhibitor-the pig kidney acylase I into the reactor any more after finishing the matrix impact. According to the method disclosed by the invention, the activity of an ANAMMOX granule group induction system under the matrix impact can be inhibited by adding the AHLs inhibitor-the pig kidney acylase I in lower concentration, so that the release amount of granular AHLs can be reduced, excessive release of LB-EPS (Loose Binding-Extracellular Polymeric Substance) can be controlled, and the stability and the sedimentation capacity of granules under the matrix impact can be increased; meanwhile, adverse effect to activity of the granules cannot be caused when the concentration of an inhibitor is lower.

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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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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