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
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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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