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Anti-biological pollution modification method for water treatment membrane material

A technology for anti-biological fouling and water treatment membranes, applied in the direction of osmosis/dialysis water/sewage treatment, chemical instruments and methods, membranes, etc., can solve the problems of water treatment membrane biofouling control difficulties, etc., to improve the ability of anti-biofouling, Reduce performance drop, strong applicability effect

Pending Publication Date: 2022-03-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem of difficult control of water treatment membrane biofouling, the present invention provides a method for antifouling modification of membrane materials, which uses quorum sensing inhibitors to modify the surface of membrane materials to inhibit the aggregation of bacteria on the surface of the membrane and the formation of biofilm At the same time, maintain the water permeability, hydrophilicity and surface negative charge of the membrane, reduce biological pollution, and improve water treatment efficiency

Method used

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  • Anti-biological pollution modification method for water treatment membrane material
  • Anti-biological pollution modification method for water treatment membrane material
  • Anti-biological pollution modification method for water treatment membrane material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Prepare 0.2% (mass fraction) dilute acetic acid aqueous solution, add chitosan in the dilute acetic acid solution, heat at a constant temperature (30° C.) and stir to prepare 0.1% chitosan solution;

[0030] (2) adding vanillin into the chitosan solution, heating at a constant temperature (30° C.) and stirring to prepare a 0.1% vanillin solution;

[0031] (3) uniformly coating the vanillin solution on the surface of the ultrafiltration membrane (UF), the solution coating thickness is 60 μm;

[0032] (4) Put the surface-coated membrane in an oven at 40°C to dry at a constant temperature. During the drying process, the coating forms a thin film to fix the modifier on the surface of the membrane to obtain a stable modified ultrafiltration membrane (UF-CV1).

Embodiment 2

[0034] (1) Prepare 0.2% (mass fraction) dilute acetic acid aqueous solution, add chitosan in the dilute acetic acid solution, heat at a constant temperature (30° C.) and stir to prepare 0.1% chitosan solution;

[0035] (2) adding vanillin into the chitosan solution, heating at a constant temperature (30° C.) and stirring to prepare a 0.1% vanillin solution;

[0036] (3) uniformly coating the vanillin solution on the surface of the reverse osmosis membrane (RO), the solution coating thickness is 60 μm;

[0037] (4) The surface-coated membrane was dried in a 40°C oven at a constant temperature. During the drying process, the coating formed a thin film and fixed the modifier on the membrane surface to obtain a stable modified reverse osmosis membrane (RO-CV1).

[0038] Bacteriostatic Performance Analysis of Modifiers

[0039] Using the plate culture method, inoculate Escherichia coli liquid (OD600=0.5) into semi-solid LB medium at a ratio of 1:50, then add a certain amount of va...

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Abstract

The invention belongs to the technical field of membranes, and discloses an anti-biological pollution modification method for a water treatment membrane material. The preparation method comprises the following steps: preparing a modified solution from a quorum sensing inhibitor and a film-forming agent, and then uniformly coating the surface of a film with the modified solution containing the quorum sensing inhibitor; and the film-forming agent forms a thin film on the surface of the film in a constant-temperature drying process, so that the quorum sensing inhibitor is fixed on the film. The modified membrane can inhibit the aggregation and growth of bacteria on the surface of the membrane and the formation of a biological membrane, maintain the water permeability, hydrophilicity and surface negative charges of the membrane, reduce biological pollution and improve the water treatment efficiency.

Description

technical field [0001] The invention belongs to the technical field of membranes, in particular to a method for modifying water treatment membrane materials to resist biological pollution. Background technique [0002] The market share of membrane separation technology in the field of water treatment has grown rapidly, and it has become a strategic technology to solve water pollution and water shortage. Membrane fouling is one of the main bottleneck problems restricting the application of membrane water treatment technology, especially the membrane surface deposition and membrane pore blockage caused by microorganisms and their metabolites, which will cause irreversible changes in the water permeability and separation characteristics of the membrane, which will reduce the water production. And effluent water quality, increase energy consumption, and even shorten the life of the membrane. The research and development of anti-fouling membrane materials is the key to control m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D71/38B01D71/12B01D71/08B01D69/02B01D67/00C02F1/44
CPCB01D71/08B01D71/38B01D71/12B01D71/56B01D69/02B01D67/0002C02F1/44B01D2325/36B01D2325/14
Inventor 韦静陈新语侯冰倩耿茹吴智仁周向同
Owner JIANGSU UNIV
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