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A method for controlling the flotation of anaerobic ammonium oxidation granular sludge in a high-load reactor

An anammox and granular sludge technology is applied in the control of anammox granular sludge floating in high-load reactors and anammox denitrification. Complex operation and other problems, to achieve the effect of strong applicability, improved activity, and simple operation process

Active Publication Date: 2021-02-26
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods cannot fundamentally regulate the physiological behavior of ANAMMOX microorganisms to spontaneously aggregate into denser particles with better sedimentation properties, so they have relatively large limitations.
For example, crushing the floating sludge particles and adding them to the reactor requires continuous collection of the floating sludge particles, breaking them up and feeding them back into the reactor, which requires a large amount of engineering and is only suitable for small-scale devices; and Controlling the appropriate shear rate This method requires corresponding experiments to explore the shear rate suitable for this type of reactor for different types of reactors. Therefore, the above method is complicated to operate in practical applications and is prone to various restrictions.

Method used

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  • A method for controlling the flotation of anaerobic ammonium oxidation granular sludge in a high-load reactor
  • A method for controlling the flotation of anaerobic ammonium oxidation granular sludge in a high-load reactor
  • A method for controlling the flotation of anaerobic ammonium oxidation granular sludge in a high-load reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Effects of signal molecule type and concentration on the settling performance and activity of anammox granular sludge in a high-load reactor

[0040] Four groups of UASB reactors were set up, respectively for the groups without adding signal molecules (R 1 ), C8-HSL group (R 2 ), C6-HSL group (R 3 ), C12-HSL group (R 4 ). Among them, adding C8-HSL group (R 2 ), adding C6-HSL group (R 3 ) and adding C12-HSL group (R 4 ), four parallel UASB reactors were set up in each group, and the dosing concentration of signal molecules in the influent water of each reactor was set to 0.5mg / L, 5mg / L, 15mg / L and 30mg / L respectively. Among them, the four parallel UASB reactors in each group of C8-HSL group, C6-HSL group and C12-HSL group are numbered R according to the signal molecule dosage concentration from small to large. 2-1 , R 2-2 , R 2-3 , R 2-4 , R 3-1 , R 3-2 , R 3-3 , R 3-4 , R 4-1 , R 4-2 , R 4-3 , R 4-4 .

[0041] The same amount of inoculated sludge was ...

Embodiment 2

[0044] Example 2: Effects of Signal Molecule Mixed Solution on Settling Performance and Activity of Anammox Granular Sludge in High Load Reactor

[0045]Example 1 optimizes the type of signal molecule that can effectively control the floating of granular sludge as C8-HSL, and its optimal dosage concentration is 5mg / L; the type of signal molecule that can effectively improve the activity of granular sludge is C6-HSL, and its The optimum dosage concentration is 15mg / L. C8-HSL and C6-HSL mixed solution group (R e ), R e The concentrations of C8-HSL and C6-HSL were 5mg / L and 15mg / L respectively. Set the group without adding signal molecules (R a ), adding 5mg / L C8-HSL group (R b ), adding 15mg / LC6-HSL group (R c ), adding 30mg / L C12-HSL group (R d ). The operation and operating conditions of each group of reactors are the same as in Example 1. At the end of the high-load operating phase, the R a , R b , R c , R d and R e Take an appropriate amount of granular sludge a...

Embodiment 3

[0047] Mechanism of different types of signaling molecules affecting the settling performance of anaerobic ammonium oxidation granular sludge in a high-load reactor

[0048] In order to explore the mechanism by which different types of signal molecules affect the settling performance of anammox granular sludge in high-load reactors, the reactor R was analyzed at the end of the high-load phase in Example 2. a , R b , R c , R d and R e EPS components and content, PN / PS value and surface hydrophobicity of medium granular sludge.

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Abstract

The invention provides a method for controlling anaerobic ammonia oxidized granular sludge in a high-load reactor to float, and belongs to the field of waste water treatment. In the days from 0 to 20days, namely the early stage of a high-load operation state, a mixed solution, with a certain concentration, of two kinds of AHLs (N-acyl-homoserinelactones) signal molecules is added into the external source of feed water of the reactor everyday, and the AHLs signal molecules are not added any longer after the early stage; and the AHLs signal molecules are C8-HSL (hormone-sensitive lipase) and C6-HSL. The method can control running off caused by floating of granular sludge in the high-load anaerobic ammonia oxidation reactor as well as improve the activity of the granular sludge, so that thehigh-load reactor can maintain stable and higher denitrification efficiency.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular to an anammox denitrification technology in the wastewater treatment process, and in particular to a method for controlling the floating of anammox granular sludge in a high-load reactor. 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, ANAMMOX bacteria increase slowly and are difficult to persist, which limits the application and development of ANAMMOX technology in actual wastewater treatment. ANAMMOX granular sludge has good settling performance and can effectively retain biomass. However, in high-load reactors, ANAMMOX sludge particles are easy to float and lose, resulting in unstable operation of the reactor. Some scholars have conducted related research and proposed corresponding control strat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/006C02F3/2846C02F2101/16
Inventor 李军张晶张亚超王秀杰
Owner BEIJING UNIV OF TECH
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