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Composite film for film bioreactor and method for preparing same

A membrane bioreactor and composite membrane technology, applied in biochemical equipment and methods, methods of sampling biological materials, methods of supporting/fixing microorganisms, etc. Stable structural shape, not easy to fall off and damage, good mechanical stability, etc.

Active Publication Date: 2009-06-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, Kubota Company invented a plate filter formed by directly compounding the flat membrane on the support layer. This filter has the characteristics of easy cleaning, but its strength is not enough, and the surface membrane is easy to fall off and be damaged, so it cannot adapt to the high-pressure working environment.

Method used

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  • Composite film for film bioreactor and method for preparing same
  • Composite film for film bioreactor and method for preparing same
  • Composite film for film bioreactor and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of rigid porous material support layer: put 32g of polyethylene into a mold coated with silicone oil release agent, the size of the mold is 10cm×10cm×0.45cm, put it into a sintering furnace for sintering. After sintering, the mold was not taken out and cooled. Open the mold and take out the product.

[0025] (2) Preparation of film-making solution: put 152g of N'N-dimethylacetamide (DMAc) in a 250mL three-necked flask, add 40g of polyvinylidene fluoride and 8g of polyvinylpyrrolidone, heat and stir at 60°C to dissolve, and configure 20wt % (mass content of polyvinylidene fluoride), sealed and allowed to stand overnight for degassing to obtain a film-forming solution.

[0026] (3) Scrape a film on the rigid porous material support layer with a film scraper. The temperature of the film-making room is 25°C, and the relative humidity is 64%. After standing in the air for 3 minutes, the rigid porous material support layer after scraping the film is placed o...

Embodiment 2

[0029] According to the same method as in Example 1, a composite membrane suitable for membrane bioreactors is prepared, except that 17wt% polyvinylidene fluoride is used as a film-making solution instead of 20wt% polyvinylidene fluoride film-making solution, and the quality of the additive polyvinyl alcohol is polyvinylidene fluoride 10wt% of vinyl fluoride mass.

Embodiment 3

[0031] Composite membranes suitable for membrane bioreactors were prepared in the same manner as in Example 1, except that polyethylene and polypropylene were blended at a mass ratio of 80:20 instead of polyethylene as the polymer material, and the sintering temperature was set at 220°C.

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Abstract

The invention provides a composite film for film bioreactor, mainly comprising a porous material supporting layer and an organic film layer which is attached to the surface of the supporting layer; wherein, the porous material supporting layer is formed by sintering one or more than two polymer materials as follows: polytetrafluor ethylene, polyethylene, polypropylene, polymethylpentenes and polystyrene; the film material of the organic film layer consists of one or more than two polymers as follows: polyether sulfone, polysulphones, polyacrylic acid ester, polybutene, polyamides, PEEK, polycellulose ester, polyacrylonitrile, polyvinyl alcohol, polystyrene, polyphenylene oxide, polyester carbonates, polyurethanes, polyacrylate, polyoxyethylene, and polysiloxanes. The composite film has high supporting strength, good mechanical stability, stable structural shape, convenient cleaning and replacement, and can be applicable to various high-pressure environments, with the surface film not easy to be fallen and damaged.

Description

(1) Technical field [0001] The invention relates to a composite membrane used in a membrane bioreactor and a preparation method thereof. (2) Background technology [0002] Membrane bioreactor (MBR) is a device that uses enzymes, microorganisms, or animal and plant cells as catalysts to perform chemical reactions or biotransformations, and at the same time, rely on ultrafiltration or microfiltration separation membranes to continuously separate the reaction products and intercept the catalysts. , is a new type of high-efficiency process combined with reaction process and membrane separation technology. Membrane bioreactors can be used not only for sewage treatment and water reuse, but also for promoting chemical or biological reactions. Membrane material is the key and core component of membrane bioreactor technology. At present, there are two types of membranes used in membrane bioreactors: organic membranes and inorganic membranes. Organic membranes mainly include hollow...

Claims

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Application Information

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IPC IPC(8): B01D69/10C12M1/12C02F3/02C02F1/44
CPCC12M33/14
Inventor 王建黎王靓
Owner ZHEJIANG UNIV OF TECH
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