Low-cost sewage oil stain filtering plate and preparation method thereof

Abstract

The invention belongs to the technical field of sewage treatment, and provides a low-cost sewage oil stain filtering plate and a preparation method thereof. The method comprises the following steps: first, preparing a concrete layer by adopting a foaming process; then, adding glass fibres into silica gel solution to obtain a mixture; coating the surface of the foamed concrete layer with the mixture; further bonding a high-strength polymer fiber textile layer to an aerogel layer to obtain the sewage filtering plate. Compared with the conventional method, the high-strength polymer fiber textilelayer of the low-cost sewage oil stain filtering plate prepared by the preparation method has good toughness, and can effectively protect the filtering plate from being impacted and damaged by sewage;special micro-pores are formed by utilizing silica aerogel, so that pollutants, such as oil stain, micro-particles and bacterial particles, in the sewage can be effectively filtered; the filtering performance reaches the filtering capability of an ultra-filtration membrane; meanwhile, the foamed concrete layer is taken as a supporting layer, so that the service life of the filtering plate is effectively prolonged, the cost is reduced, and the filtering plate can be widely applied to the field of sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and provides a low-cost sewage oil filter plate and a preparation method. Background technique [0002] At present, the problem of water pollution is becoming more and more serious. Not only the domestic garbage pollutes water sources and the eutrophication of lake water is quite serious, but also the oil pollution of rivers, lakes and oceans is becoming more and more serious due to industrial production and marine transportation. Especially after an oil pollution incident, oil floats on the sea surface and rapidly spreads to form an oil film, which can migrate and transform through diffusion, evaporation, dissolution, emulsification, photodegradation, and biodegradation and absorption. Oil can cling to fish gills, smothering fish and inhibiting waterfowl spawning and hatching. The formation of oil film can hinder the reoxygenation of water body, affect the growth of marine plankton, and...

AI Technical Summary

Problems solved by technology

In addition, Qiu Yingying and others invented a method for preparing an anti-pollution composite filter membrane (China Invention Patent Application No. 201610469765.9). In view of the current method for reducing membrane pollution, the process is complicated, the surface coating is easy to fall off, and it is difficult to obtain a uniform improvement. At the same time, the preparation process of the filter membrane for oil extraction sewage treatment is complicated, so the cost is relatively high, and it is not easy to regenerate. The present invention activates the expanded graphite at high temperature, and then mixes it with fatty acid polyoxyethylene ester for surface modification. The hydrophilicity of the membrane is then mixed with polyethylene glycol, soybean protein isolate and sodium carboxyethyl cellulose, under the catalysis of titanium dioxide, with ferulic acid as a crosslinking agent, and under the action of screening strains, internal Structural modification, encapsulating enzymes to decompose pollutants at the same time, increasing anti-pollution, and finally increasing the mechanical strength of the filter membrane through electronic modification, so as to prepare an anti-pollution composite filter membrane with uniform structure, not easy to fall off, and high mechanical strength

[0006] It can be seen that when the sewage treatment filter membranes and filter plates in the prior art are used for sewage purification, there are disadvantages such as high cost, short service life, easy clogging, small water flux, and difficulty in adapting to a large amount of sewage filtration.

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