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Method for preparing membrane bioreactor plain filter membrane for industrial sewage treatment

A membrane bioreactor, industrial sewage technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the problem of strong tolerance MBR membrane preparation and development issues, to achieve the effect of strong tolerance, simple process and high retention rate

Active Publication Date: 2009-06-17
江苏沛尔膜业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The MBR process has obvious advantages, but the preparation of MBR membranes with strong tolerance, anti-pollution, high water flux, and high rejection has always been one of the bottlenecks hindering its application and development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Polymer membrane material polyvinylidene fluoride (molecular weight distribution: 250,000 to 300,000), mass percentage 8.5%; polyacrylonitrile (molecular weight distribution: 90 to 110,000), mass percentage 1.0%; polyetherimide (molecular weight distribution: 200,000 to 230,000), 1.0% by mass; phthalazine polyethersulfone (molecular weight distribution: 150,000 to 180,000), 0.5% by mass. Solvent: N-methylpyrrolidone, 65% by mass; tetrahydrofuran, 15% by mass. The polymer film material is placed in a solvent and stirred at 80° C. for 36 hours to dissolve it. Cool down to 60°C, add additive polyethylene glycol (molecular weight distribution: 6000~8000), mass percentage 5%; hyperbranched poly(amine-ester) (molecular weight distribution: 4000~5000), mass percentage 2%; oxalic acid, mass percentage The percentage is 1% and mix well. Cool down to 30°C, add porogen acetone, with a mass percentage of 1%, and stir evenly to obtain a casting solution. After the casting solution is fi...

Embodiment 2

[0033] Polymer membrane material polyvinylidene fluoride (molecular weight distribution: 300 to 350,000), mass percentage 7.5%; polyacrylonitrile (molecular weight distribution: 90 to 110,000), mass percentage 2.0%; phthalazine polyether ketone (Molecular weight distribution: 120,000 to 140,000), with a mass percentage of 1.0%; phthalazine polyethersulfone (molecular weight distribution: 150,000 to 180,000), with a mass percentage of 1.5%. Solvent: N-methylpyrrolidone, 45% by mass; Triethyl phosphate, 35% by mass. The polymer membrane material was placed in a solvent and stirred at 85°C for 36 hours to dissolve it. Cool down to 60℃, add additive Tween 80, mass percentage 3%; polyethylene glycol (molecular weight distribution: 5000~6000), mass percentage 3%; hyperbranched poly(amine-ester) (molecular weight distribution: 4000~5000) , The mass percentage is 1.5%. Cool down to 30°C, add porogen methanol with a mass percentage of 0.5%, and stir evenly to obtain a casting solution. Aft...

Embodiment 3

[0038]Polymer film material polyfial fluoride (molecular weight distribution: 30 ~ 350,000), mass percentage 8.0%; polyetherimide (molecular weight distribution: 20 ~ 230,000), mass percentage of 2.0%; diazorane phenylene Ether ketone (molecular weight distribution: 12 ~ 140,000), mass percentage of 1.0%; diazepine phenylene phenylene polyether sulfone (molecular weight distribution: 15 to 180,000), mass percentage of 1.0%. Solvent N-methylpyrrolidone, mass percentage of mass; triethyl phosphate, mass percentage of 20%. The polymer film material was placed in a solvent, and stirred at 80 ° C for 36 h to dissolve. Cooling to 60 ° C, adding additive polyethylene glycol (molecular weight distribution: 4000 ~ 5000), mass percentage of 5%; oxalic acid, mass percentage; hyperbranched poly (amine-ester) (molecular weight distribution: 4000 ~ 5000), quality A percentage of 1.0%. Covered to 30 ° C, stirred throw to obtain a cast film solution. After the cast film liquid is filtered and vac...

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Abstract

The invention discloses a method for preparing a plain-film filter membrane of a membrane bioreactor used in treatment of industrial sewage. The method comprises: dissolving polymer membrane material in solvent; adding with additive and evenly stirring; adding with pore-forming agent and evenly stirring so as to prepare casting solution; after filtering and vacuum defoamation of the casting solution, blade-coating the casting solution on polyester non-woven fabrics; and after being stood in air for a period of time, soaking the polyester non-woven fabrics in gel bath for gel curing, and preparing the plain-film filter membrane. The filter membrane prepared by the method simultaneously has the characteristics of strong tolerance, pollution resistance, high pure water flux, high rejection rate and the like. When the filter membrane is used to prepare MBR series membranes in 0.25, 1.0 and 1.5 square meters, the MBR series membranes can be used for industrial sewage treatment, and the effluent quality is better than the PRC Integrated Wastewater discharge Standard (GB / 8978-1996).

Description

Technical field [0001] The invention relates to a method for preparing a flat sheet filter membrane of a membrane bioreactor for industrial sewage treatment, and belongs to the technical field of industrial sewage treatment and membrane separation. Background technique [0002] my country is one of the 20 most water-scarce countries in the world, with an annual water shortage of more than 40 billion tons, and the per capita water resources are less than 1 / 4 of the world average. The per capita fresh water volume ranks only 108th in the world, and the east-west, north-south The distribution is extremely uneven. On the one hand, there is a serious water shortage. On the other hand, with the rapid expansion of my country's economic development and the scale of cities, the amount of industrial sewage discharge has increased sharply, and the annual sewage discharge is estimated to be more than 26 billion tons. Therefore, the research on industrial wastewater treatment and reuse is of ...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F1/44
CPCY02W10/10
Inventor 李继定陈剑林阳政周强王建春刘敏忠
Owner 江苏沛尔膜业股份有限公司
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