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Microbe immobilicing gel material for waste water treatment

A technology of microbial immobilization and gel material, which can be used in immobilized enzymes, biological water/sewage treatment, biochemical equipment and methods, etc. Good alkali stability, wide heat-resistant temperature, good thermal stability

Inactive Publication Date: 2007-10-03
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic immobilization materials such as ceramics, walnut shells, alginate, etc. are cheaper, but the immobilization effect is poor, and microorganisms are easy to fall off; organic materials such as polyurethane, polyvinyl alcohol (PVA) and other organic polymers have good immobilization effects, but microbial growth activity Low, poor bioaffinity, and expensive, the degradation effect of pollutants is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select 8-40 mesh bentonite and mix it in 20mL CMC solution, place it, dissolve 0.5g chitosan in 25mL acetic acid solution, mix bentonite-CMC solution and chitosan-acetic acid solution, stir at 400rpm at high speed for 20min, add Fix in 30mL glutaraldehyde solution for 1 hour, add water, cut into required size, soak in water, and set aside for 1 day.

[0021] The prepared CBC material has a density of 1.06×10 3 kg·m -3 , the water absorption rate is 16.50, the thermal stability is good in the temperature range of 10-90 ℃, and the acid-base stability is in the range of pH 3-10. When the NaCl concentration exceeds 0.4%, the mass transfer performance no longer changes with the increase of the concentration. CBC material has good mass transfer performance. When methyl orange diffuses from the outside to the inside, the mass transfer coefficient K 1 =0.0046mm min -1 , when methyl orange diffuses from inside to outside, K 2 =0.016mm min -1 .

[0022] Take wet weight 20g...

Embodiment 2

[0024] Select bentonite with a mesh size of 180 or more and mix it in 20mL of CMC solution, place it, dissolve 0.75g of chitosan in 25mL of acetic acid solution, mix bentonite-CMC solution and chitosan-acetic acid solution, stir at 400rpm for 20min at high speed, add Fix it with 30mL glutaraldehyde solution for 4 hours, add water, cut it into the required size, soak it in water, and set it aside for 1 day before use.

[0025] The prepared CBC material has a density of 1.17×10 3 kg·m -3 , the water absorption rate is 17.50, the thermal stability is good in the temperature range of 10-80 ℃, and the acid-base stability is in the range of pH 3-10. When the NaCl concentration exceeds 0.5%, the mass transfer performance no longer changes with the increase of the concentration. CBC material has good mass transfer performance. When methyl orange diffuses from the outside to the inside, the mass transfer coefficient K 1 =0.0052mm min -1 , when methyl orange diffuses from inside to ...

Embodiment 3

[0028] Select 40-180 mesh bentonite and mix it in 20mL CMC solution, place it, dissolve 1.0g chitosan in 25mL acetic acid solution, mix bentonite-CMC solution and chitosan-acetic acid solution, stir at 400rpm at high speed for 20min, add Fix with 30mL glutaraldehyde solution for 2 hours, add water, cut into required size, soak in water, and set aside for 1 day.

[0029] The prepared CBC material has a density of 1.09×10 3 kg·m -3 , the water absorption rate is 18.50, the thermal stability is good in the temperature range of 10-80 ℃, and the acid-base stability is in the range of pH 3-10. When the NaCl concentration exceeds 0.4%, the mass transfer performance no longer changes with the increase of the concentration. CBC material has good mass transfer performance. When methyl orange diffuses from the outside to the inside, the mass transfer coefficient K 1 =0.0055mm min -1 , when methyl orange diffuses from inside to outside, K 2 =0.013mm min -1 .

[0030] Take wet weigh...

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PUM

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Abstract

The present invention discloses one kind of microbe immobilizing gel material for waste water treatment. The microbe immobilizing gel material consists of chitosan, bentonite, CMC, glytaraldehyde, etc. and its preparation process includes the following steps: drying and grinding bentonite, adding bentonite powder into CMC solution, mixing with acetic acid solution of chitosan in certain concentrate to produce cross-linking reaction and to obtain the gel material comprising chitosan, bentonite and CMC and named as CBC. The microbe immobilizing gel material has certain mechanical strength, low cost, moderate water absorption, no degradation by microbe in water, high heat stability, high acid and base resisting stability, high adsorbing and mass transfer performance, long service life, no harm to microbe and wide application foreground in microbe immobilizing water treatment.

Description

technical field [0001] The invention relates to a microorganism immobilized gel material for waste water treatment. Background technique [0002] Immobilized microorganism technology refers to a technology that fixes free cells or microorganisms by chemical or physical methods to make them insoluble in water but still have high biological activity. It was developed on the basis of immobilized enzyme technology in the 1970s. In the late 1970s, due to the increasingly serious water pollution problem, it was urgent to develop new technologies for efficient wastewater treatment, so immobilized microbial technology began to be introduced into the field of wastewater treatment. . This technology can immobilize the screened dominant bacteria or microorganisms to form an efficient wastewater treatment system. Compared with the traditional suspension biological treatment method, it has high treatment efficiency, strong stability, less sludge production, and no sludge bulking. , sol...

Claims

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Application Information

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IPC IPC(8): C12N11/00C12N11/04C02F3/10
CPCY02W10/10
Inventor 李济吾蔡伟建
Owner ZHEJIANG GONGSHANG UNIVERSITY
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