A water treatment method that regulates the rapid start of biofilm nitrification

A technology of nitrification and rapid start-up, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the impact of reactor operating efficiency, long generation cycle of nitrifying bacteria, which is not conducive to water Nitrogen transfer and other issues, to achieve the effect of promoting growth and nitrification, improving removal efficiency, and shortening the start-up period

Active Publication Date: 2019-07-16
HARBIN INST OF TECH
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Problems solved by technology

However, when the target pollutant concentration is relatively low, it is difficult to form a biofilm on the surface of the filler in a short time, and the operating efficiency of the reactor is affected.
In addition, the generation cycle of nitrifying bacteria in water treatment is long, which limits the process of nitrification and is not conducive to the transfer of nitrogen in water

Method used

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  • A water treatment method that regulates the rapid start of biofilm nitrification
  • A water treatment method that regulates the rapid start of biofilm nitrification
  • A water treatment method that regulates the rapid start of biofilm nitrification

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Experimental program
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Effect test

specific Embodiment approach 1

[0021] Specific implementation mode one: in this implementation mode, a water treatment method that regulates the rapid start of biofilm nitrification:

[0022] During the operation of the bioreactor, the hydraulic retention time is 0.5-2.5h, the dissolved oxygen concentration is higher than 2mg / L, the operating temperature of the bioreactor is 5-30°C, and the feed water treatment filler is a fluidized bed light suspension filler, of which biological The initial concentration of exogenous AHLs at the initial stage of reactor start-up is 0.1 μmol / L-1.0 μmol / L, and the method of adding the exogenous AHLs is directly adding to the bioreactor or loading exogenous AHLs on the surface of the carrier and then adding the carrier Dosing into the bioreactor, the concentration of ammonia nitrogen in the influent water is ≤5mg / L, and the concentration of total organic carbon is ≤10mg / L;

[0023] The exogenous AHLs are N-butyryl homoserine lactone (C 4 -HSL), N-hexanoyl homoserine lactone...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the light suspension filler carrier of the fluidized bed is polyethylene plastic filler or polypropylene plastic filler. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the dissolved oxygen concentration is 5-7 mg / L. Others are the same as those in the first or second embodiment.

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Abstract

A water treatment method for regulating the quick start of biofilm nitrification, the invention belongs to the technical field of water supply treatment, and relates to a method for regulating the rapid start of biofilm nitrification by N-acyl homoserine lactone (AHLs) signal molecules. The purpose of the present invention is in order to provide a kind of method that utilizes N-acyl homoserine lactone (AHLs) class signal molecule to regulate and control biofilm nitrification quick-starting method, the hydraulic retention time is 0.5-2.5h in the operation process of bioreactor, dissolving The oxygen concentration is higher than 2mg / L, the operating temperature of the bioreactor is 5-30°C, and the feedwater treatment filler is a fluidized bed light suspension filler, and the initial concentration of exogenous AHLs at the beginning of the bioreactor startup is 0.1μmol / L-1.0 μmol / L, pollutant ammonia nitrogen concentration in the influent ≤ 5mg / L, total organic carbon concentration ≤ 10mg / L; the method of the present invention shortens the start-up period of the reactor by accelerating the formation of biofilm, regulates the growth of nitrifying bacteria, and promotes its Become the dominant bacterial group, thereby promoting the transfer of nitrogen in water.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment, and relates to a method for rapidly starting biofilm nitrification controlled by N-acyl homoserine lactone (AHLs) signal molecules. Background technique [0002] Biofilm treatment of target pollutants has many significant advantages, including large biomass, rich biophase, high removal rate, and stable reactor operation, so it has been widely used in water treatment. However, when the target pollutant concentration is relatively low, it is difficult to form a biofilm on the surface of the filler in a short time, and the operating efficiency of the reactor is affected. In addition, the long generation cycle of nitrifying bacteria in water treatment limits the process of nitrification, which is not conducive to the transfer of nitrogen in water. Therefore, how to realize the rapid formation of biofilm and the rapid and efficient operation of water treatment reactors, especially nitr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02C02F3/10
Inventor 冯惠王威崔福义杜茂安张欣桐刘元仁
Owner HARBIN INST OF TECH
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