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Method for monitoring growth process of organic pollutant on membrane surface of MBR in real time

A technology for organic pollutants and growth process, which is applied in the field of real-time monitoring of the growth process of organic pollutants on the MBR membrane surface, can solve the problems of inability to monitor the pollution on the membrane surface, and achieve the effects of slowing down membrane pollution, convenient operation and improving properties.

Inactive Publication Date: 2020-03-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The three-dimensional excitation emission matrix is ​​a matrix spectrum represented by three-dimensional coordinates of excitation wavelength, emission wavelength and fluorescence intensity. Currently, Hao Ruixia et al. have used the three-dimensional excitation emission matrix in sewage treatment, but this method only tests the pollutant components and content
In a stable continuous flow MBR system, the time-varying trend of the pollutant content in the sewage is inconsistent with the pollutants on the membrane surface. With the extension of the operation time of the MBR system, the pollutant content in the sewage gradually decreases and tends to Stable, but the content of pollutants on the membrane surface is gradually increasing. Measuring the content of pollutants in the sewage cannot directly obtain the pollution of the membrane surface, nor can it monitor the pollution of the membrane surface in real time.

Method used

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  • Method for monitoring growth process of organic pollutant on membrane surface of MBR in real time
  • Method for monitoring growth process of organic pollutant on membrane surface of MBR in real time
  • Method for monitoring growth process of organic pollutant on membrane surface of MBR in real time

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Effect test

Embodiment 1

[0050] A method for monitoring the growth process of organic pollutants on the MBR membrane surface in real time, comprising the steps of:

[0051] (1) Titanium wire is used to wrap the membrane surface, and the membrane surface is divided into several 1cm×1cm squares by titanium wire. The membrane is connected with a vacuum gauge and placed in an MBR to treat urban domestic sewage;

[0052] (2) When the transmembrane pressure difference rises to 1kPa, use a syringe to absorb the membrane surface pollutants in the grid, dissolve them in 100mL distilled water and shake well;

[0053] (3) Centrifugal filtration was used to extract soluble microbial products, and heat extraction was used to extract extracellular polymers. After the extracts were filtered through a 0.45 μm filter membrane, the concentration of total organic carbon in the extract solution was measured. If its total organic carbon concentration is higher than 20mg / L, dilute it to less than 20mg / L;

[0054] (4) Use ...

Embodiment 2

[0058] A method for monitoring the growth process of organic pollutants on the MBR membrane surface in real time, comprising the steps of:

[0059] (1) Titanium wire is used to wrap the membrane surface, and the membrane surface is divided into several 1cm×1cm squares by titanium wire. The membrane is connected with a vacuum gauge and placed in an MBR to treat urban domestic sewage;

[0060] (2) When the transmembrane pressure difference rises to 5kPa, use a syringe to absorb the membrane surface pollutants in the grid, dissolve them in 100mL distilled water and shake well;

[0061] (3) Centrifugal filtration was used to extract soluble microbial products, and heat extraction was used to extract extracellular polymers. After the extracts were filtered through a 0.45 μm filter membrane, the concentration of total organic carbon in the extract solution was measured. If its total organic carbon concentration is higher than 20mg / L, dilute it to less than 20mg / L;

[0062] (4) Use ...

Embodiment 3

[0066] A method for monitoring the growth process of organic pollutants on the MBR membrane surface in real time, comprising the steps of:

[0067] (1) Titanium wire is used to wrap the membrane surface, and the membrane surface is divided into several 1cm×1cm squares by titanium wire. The membrane is connected with a vacuum gauge and placed in an MBR to treat urban domestic sewage;

[0068] (2) When the transmembrane pressure difference rises to 14kPa, use a syringe to absorb the membrane surface pollutants in the grid, dissolve them in 100mL distilled water and shake well;

[0069] (3) Centrifugal filtration was used to extract soluble microbial products, and heat extraction was used to extract extracellular polymers. After the extracts were filtered through a 0.45 μm filter membrane, the concentration of total organic carbon in the extract solution was measured. If its total organic carbon concentration is higher than 20mg / L, dilute it to less than 20mg / L;

[0070] (4) Use...

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Abstract

The invention discloses a method for monitoring the growth process of an organic pollutant on a membrane surface of a MBR in real time and belongs to the field of water resource treatment. According to the invention, the MBR membrane surface pollutant is taken as a monitoring object, a three-dimensional excitation emission matrix is used as a monitoring means, the composition and content of soluble microbial products and extracellular polymeric substances in membrane surface sludge are judged according to the position and peak intensity of a fluorescence characteristic peak on a matrix spectrogram, the accumulation degree of the pollutant on the membrane surface can be judged in real time without damaging a membrane, and the method is simple and convenient to operate and high in accuracy.By utilizing the method disclosed by the invention, the change trend of the organic pollutant on the membrane surface can be monitored on line in real time in the process of treating urban domestic sewage by the MBR such that MBR operating parameters are adjusted, the property of activated sludge is improved, the membrane pollution is alleviated, and meanwhile, a proper cleaning scheme can be formulated according to the components of the membrane surface pollutant.

Description

technical field [0001] The invention relates to a method for real-time monitoring the growth process of organic pollutants on an MBR membrane surface, belonging to the field of water resources treatment. Background technique [0002] Membrane bioreactor (MBR) process has been widely used in the field of sewage treatment, but membrane fouling is still the main factor affecting the stable operation of MBR process and hindering its further commercial application. During the membrane filtration process, pollutants are trapped in the membrane pores or on the surface of the membrane, blocking the membrane pores, or narrowing the membrane pores, resulting in a decrease in the effluent flux (constant pressure operation) or an increase in the transmembrane pressure difference (constant flux operation). high. [0003] In the process of MBR treating urban domestic sewage, the formation of the filter cake layer on the membrane surface is the main factor causing membrane fouling, and th...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N21/78
CPCG01N21/6428G01N21/78G01N2021/6419G01N2021/6423
Inventor 李秀芬印霞棐华兆哲
Owner JIANGNAN UNIV
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