Bacteria-immobilized hollow fiber polysulfone film for degradation of high concentration tetrachlorphenoxide, and preparation method thereof

A tetrachlorophenol, high-concentration technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems that bacteria cannot grow, and co-metabolism is difficult to carry out, so as to shorten the hydraulic retention time and reduce the production cost , the effect of increasing the concentration of microorganisms

Active Publication Date: 2012-10-17
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Technical problem to be solved: In order to solve the inhibitory effect of the matrix on bacteria when degrading high-concentration tet

Method used

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  • Bacteria-immobilized hollow fiber polysulfone film for degradation of high concentration tetrachlorphenoxide, and preparation method thereof
  • Bacteria-immobilized hollow fiber polysulfone film for degradation of high concentration tetrachlorphenoxide, and preparation method thereof
  • Bacteria-immobilized hollow fiber polysulfone film for degradation of high concentration tetrachlorphenoxide, and preparation method thereof

Examples

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Embodiment 1

[0024] This embodiment is a bacteria-immobilized hollow fiber polysulfone membrane added with activated carbon for degrading high-concentration tetrachlorophenol in industrial wastewater. The general-purpose and low-cost polymer polysulfone is used as the raw material. The polymer polysulfone is transparent bisphenol A polysulfone, which is formed by polycondensation of bisphenol A and 4,4-dichlorodiphenyl sulfone, with a molecular weight of 100,000~116,500 , the glass transition temperature is 180~190°C, the heating deformation temperature is 170~175°C, the tensile strength is 75MPa, and the flexural modulus is 2650MPa. Activated carbon particles supplemented with coconut shells have an average particle size of less than 10μm and a specific surface area of ​​1104m 2 / g , void volume 0.92cm 3 / g, 1-methyl-2-pyrrolidone is a solvent, and the polymer polysulfone, activated carbon particles and 1-methyl-2-pyrrolidone are mixed in a mass ratio of 1:4:5. First, various raw materi...

Embodiment 2

[0029] This embodiment is a bacteria-immobilized hollow fiber polysulfone membrane added with activated carbon for degrading high-concentration tetrachlorophenol in industrial wastewater. The composition and preparation method of the membrane material are the same as in Example 1, but the dosage of granular activated carbon is increased, and the mass ratio of polymer polysulfone, activated carbon particles and 1-methyl-2-pyrrolone is adjusted to 1:5:5 . The resulting fiber membrane also has a three-layer asymmetric structure, but the outer surface of the membrane is denser, and the distribution of activated carbon particles in the membrane is more uniform and concentrated, so that the adsorption capacity of the bacteria-immobilized hollow fiber polysulfone membrane added with activated carbon is further strengthened, and the degradation During the experiment, the concentrations of phenol and tetrachlorophenol were adjusted to 1000mg / L and 200mg / L, and the treatment efficiency ...

Embodiment 3

[0032] Bacteria-immobilized hollow fiber polysulfone membrane used to degrade high-concentration tetrachlorophenol. The membrane has an asymmetric three-layer structure, which is divided into outer layer, middle support layer and inner surface layer from outside to inside; activated carbon is evenly distributed in each layer Particles, particle size ≤ 10μm, specific surface area 1104m 2 / g, void volume 0.92cm 3 / g, the continuous phase of the membrane is transparent bisphenol A polysulfone with a molecular weight of 100,000-116,500, and Pseudomonas aeruginosa is immobilized on the surface and middle layer of the membrane. The activated carbon particles are made from coconut shells. The transparent bisphenol A polysulfone is polycondensed from bisphenol A and 4,4-dichlorodiphenyl sulfone, with a molecular weight of 100,000-116,500, a glass transition temperature of 180-190°C, a heating deformation temperature of 170-175°C, and Tensile strength 75MPa, flexural modulus 2650MPa....

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Abstract

The invention relates to a bacteria-immobilized hollow fiber polysulfone film for degradation of high concentration tetrachlorphenoxide, and a preparation method thereof. The film has an asymmetric three-layer structure, and is divided into an outer surface layer, a middle support layer and an inner surface later from the outer to the inner, wherein active carbon particles are uniformly distributed in each layer, the particle size is less than or equal to 10 mum, the specific surface area is 1104 m<2>/g, the dead volume is 0.92 cm<3>/g, the continuous phase of the film is transparent bisphenol A type polysulfone, the molecular weight is 100000-116500, and Pseudomonas aeruginosa is fixed in the surface of the film and the middle layer. After microbial immobilization is performed, the bacteria provide increased tolerance limitation for the high concentration toxic substrates so as to continuously grow. The degradation of the high concentration matrix by the immobilized bacteria mainly depends on protective effects on the bacteria by the hollow fiber film, such that the bacteria can grow so as to degrade the matrix.

Description

[0001] technical field [0002] The invention relates to a bacteria-immobilized hollow fiber polysulfone membrane added with activated carbon for degrading high-concentration tetrachlorophenol and a preparation method thereof. [0003] Background technique [0004] With the development of industrial agriculture, a large amount of domestic and industrial wastewater is discharged into water bodies, especially herbicides, insecticides, fungicides, heat exchange catalysts, insulators, lubricants, a large number of manufacturing and use of these substances, all of which The organic matter contained in it will inevitably cause soil and water pollution, and even its concentration in some industrial wastewater is as high as 1000 mg / L. These substances are highly toxic, difficult to degrade, and easy to accumulate in organisms, thus having a huge impact on the environment. On the other hand, the fresh water sources available on the earth are becoming more and more scarce, and more ...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/08C02F3/34C02F101/12
Inventor 李轶袁远张文龙王秋英
Owner HOHAI UNIV
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