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Water treatment method capable of regulating and controlling rapid start of nitrification effect of biological membrane

A nitrification, quick-start technology, applied in biological water/sewage treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problem of long generation period of nitrifying bacteria, the influence of reactor operating efficiency, and the difficulty of biofilm on the surface of packing, etc. problems, to achieve the effect of promoting growth and nitrification, shortening the start-up period, and improving removal efficiency

Active Publication Date: 2016-09-07
HARBIN INST OF TECH
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  • Application Information

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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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  • Water treatment method capable of regulating and controlling rapid start of nitrification effect of biological membrane

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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

The invention provides a water treatment method capable of regulating and controlling rapid start of nitrification effect of a biological membrane, belongs to the technical field of feed water treatment and relates to a method for regulating and controlling rapid start of nitrification effect of a biological membrane by use of N-acyl homoserine lactone (AHLs) signal molecules. The invention aims at providing a method for regulating and controlling rapid start of nitrification effect of a biological membrane by use of N-acyl homoserine lactone (AHLs) signal molecules. During an operation process of a bioreactor, the hydraulic retention time is 0.5-2.5h, the dissolved oxygen concentration is higher than 2mg / L, the operation temperature of the bioreactor is 5-30 DEG C, a fluidized bed light suspended filler is utilized as a feed water treatment filler, the initial concentration of exogenous AHLs at the start-up initial stage of the bioreactor is 0.1 mu mol / L-1.0 mu mol / L, the pollutant ammonia concentration of inlet water is less than or equal to 5mg / L, and the total organic carbon concentration is less than or equal to 10mg / L. According to the method, through quickening formation of a biological membrane, the start period of the reactor is shortened, growth of nitrobacteria is regulated and controlled, nitrobacteria is promoted to become dominant microflora, and thus transfer of nitrogen in water is promoted.

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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IPC IPC(8): C02F3/02C02F3/10
CPCC02F3/02C02F3/105C02F3/1268Y02W10/10
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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