KR101712813B1 - Method for preparing filter - Google Patents

Abstract

The present invention relates to a method for producing filter media which are inserted into waste water and sewage. According to the present invention, the method for producing the filter media which are inserted into waste water and sewage comprises the following steps: pulverizing fiber-reinforced plastic in specific size with specific particle diameter; acquiring fiberglass lumps by sintering the fiber-reinforced plastic; acquiring molded fiberglass articles by immersing the fiberglass into a solution mixed with a coupling agent and an additive and then sintering the same thereafter; and modifying surfaces of the molded fiberglass articles.

Description

[0001] The present invention relates to a method for preparing filter media,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a filter material to be introduced into a sewage and sewage treatment facility, and more particularly, to a method for manufacturing a filter material using a fiber reinforced plastic.

Fiber Reinforced Plastics are mostly made of glass fiber and resin. Fiber reinforced plastics have excellent mechanical, corrosion and moldability and are used in various fields such as construction, civil engineering, and aviation.

In the fiber-reinforced plastic, a roving layer is formed between matte layers, glass fibers are closely arranged in the roving layer, and a mat layer formed above and below the roving layer is formed to protect the roving layer. The thickness of the roving layer is about 1/7 of the thickness of the matte layer. Accordingly, it is very difficult to mechanically separate the mat layer for the roving layer.

As another method for recycling fiber-reinforced plastic, there is a method of crushing. In the crushing method, the waste fiber reinforced plastic is put into the crusher and finely cut. The dust containing the glass fiber generated at this time is removed with a separate dust remover.

The cut fiber-reinforced plastic is suitable for removing contaminants because the fiberglass contained therein is similar to a weft and warp-woven structure. However, there is a need for a mechanical and chemical method of regulating the size of the pores of the glass fibers contained in the shredded fiber-reinforced plastic.

On the other hand, Japanese Patent Application Laid-Open No. 10-2003-0050375 discloses a floating filter medium for treating wastewater used for advanced treatment of livestock wastewater, purified wastewater wastewater, industrial wastewater, and domestic wastewater, wherein carbonate, zirconium oxide, Alumina, and a binder are dry-blended, water is added to remultiplex, and the mixed filter material is formed into a sphere using a molding machine. Then, the formed filter material is dried at room temperature, and then treated at high temperature and cooled to produce a filter material.

The biofilter sewage and wastewater treatment method using the high hydrophilic filter media of Patent Registration No. 10-0449138. A filter material containing melamine foam of Patent Publication No. 10-0516845 and a biofilter including the filter material. EP-A-10-2003-0050375, and a method for producing the same. Open Patent Publication No. 10-2002-0057775 DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The sewage sludge treatment apparatus using the porous sintered body as a filter medium.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a manufacturing method of a filter material capable of removing foreign matters contained in sewage and sewage water using a glass fiber structure contained in a fiber- .

It is also an object of the present invention to provide a method of manufacturing a filter material having porosity for removing floating foreign matter contained in sewage and having excellent foreign matter adsorption ability.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the following description.

A method of manufacturing a filter material according to the present invention is a method of manufacturing a filter material to be introduced into sewage and sewage, comprising the steps of crushing a fiber reinforced plastic to a predetermined particle size, Obtaining a glass fiber lump by firing the reinforced plastic; and dipping and firing the glass fiber in a solution mixed with the binder and the additive to obtain a glass fiber compact, and a step of modifying the surface of the glass fiber compact.

Further comprising the step of firing the fiber-reinforced plastic to obtain a glass fiber lump followed by cleaning.

As the additive in the step of obtaining the glass fiber compact, calcium carbonate is used.

The method of manufacturing a filter material according to the present invention has an advantage of recycling waste since waste plastic reinforced plastic can be used as a raw material.

Further, the filter material according to the present invention is a porous filter material coated with an adsorbing solvent and has an advantage of easily adsorbing floating foreign matter in sewage.

1 shows a method of manufacturing a filter material using a fiber-reinforced plastic according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a method for manufacturing a filter material according to the present invention.

The filter material according to the present invention uses fiber reinforced plastic which is crushed to a predetermined size as a raw material. The fiber-reinforced plastic comprises a roving layer and a mat layer, wherein the roving layer is formed between two matte layers. The mat layer is formed by rarely forming glass fibers in the resin, and the roving layer is formed by weaving 70% or more of glass fibers in the resin.

A method for manufacturing a filter material according to the present invention comprises the steps of crushing a fiber-reinforced plastic to a predetermined particle size, firing a fiber-reinforced plastic to obtain a glass fiber lump, and adding a glass fiber lump To form a glass fiber compact, and a step of modifying the surface of the glass fiber compact.

In addition, the step of firing the fiber-reinforced plastic to obtain the glass fiber may further include washing with sulfuric acid.

First, the fiber-reinforced plastic is crushed to a certain size to use as a filter material. The fiber-reinforced plastic may be provided in the form of a plate having a predetermined thickness. The plate-shaped fiber-reinforced plastic is crushed to a predetermined size on the crusher. The size of the shredded fiber-reinforced plastic may be from 900 mm ³ to 3,000 m ³ .

Meanwhile, in the present invention, the roving layer and the mat layer are not separated but the mat layer formed outside the roving layer has a low glass fiber content, so that the mat layer formed under the roving layer is removed Only the roving layer in which most of the glass fibers are present can be used.

In the step of obtaining a glass fiber lump by firing, the firing temperature may be set to 600 to 900 ° C, and the firing temperature may be controlled according to the particle size of the spun fiber-reinforced plastic. Here, firing means pyrolysis, and pyrolysis refers to decomposition of a polymer substance into a low-molecular substance by heating in the absence of air. After the firing process, a char is formed on the glass fiber lump, and the surface of the glass fiber lump is contaminated with dust or the like during the firing process. For this, the cleaning process may be continued after the firing process. The foreign substance can be removed by immersion in diluted sulfuric acid and stirring.

In the glass fiber lump, the strength of the glass fiber is remarkably lowered by heating and pressurization. In addition, the glass fiber is in a state where the bonding force is weakened by firing. To compensate for the mechanical strength of the weakened glass fiber lump and the change in physical properties due to the temperature change, the binder is immersed in the glass fiber lump in order to increase the bonding strength. The binder is prepared by stirring and mixing 60 to 80 parts by weight of a phenol resin with respect to 100 parts by weight of ethanol.

On the other hand, the voids formed in the glass fiber formed body may have a size too small to capture contaminants. The additive is then mixed with the binder to increase the size of the pores. The additive may be about 3 to 5 parts by weight based on 100 parts by weight of the ethanol. Increasing the mixing ratio of the additives increases the number of pores, and lowering the mixing ratio of the additives reduces the number of pores. The mixing of suitable entraining agents can control the number of pores.

In the present invention, calcium carbonate (CaCO ₃ ) is used as an additive. Calcium carbonate forms a void by firing. The firing temperature may range from 300 ° C to 500 ° C. In order to increase the size of the pores in the firing process, pressurization is performed at a low temperature in the initial stage of firing, and the pressure is reduced when the firing temperature is reached. Calcium carbonate generates carbon dioxide gas by firing to form pores. The carbon dioxide gas is generated and discharged to form pores.

The glass fiber lump is immersed in the binder in which the additives are mixed, dried at room temperature, and then fired to obtain a glass fiber compact. By the binder, the glass fiber is not easily broken and can maintain the shape.

Since the affinity of the glass fiber formed body with water is low, it is difficult to easily adsorb floating foreign matters contained in the sewage water. In the present invention, the surface of the glass fiber compact is coated with an adsorption solvent. The coating treatment enhances the contact with the sewage and enhances the adsorption of the substances contained in the sewage. As the adsorbent material according to the present invention, polyamide-based polymer materials such as cellulose acetate and cellulose nitrate, such as cellulose and nylon, can be used.

 <Examples>

The fiber-reinforced plastic is cut to a size of 1,000 mm ³ and then fired at 800 ° C. for 1 hour to obtain a glass fiber lump. Thereafter, it is immersed in dilute sulfuric acid of 35% concentration to remove foreign matter adhering to the glass fiber lump.

Then, the washed glass fiber lump is added to a mixture of 370 g of phenol resin and 20 g of calcium carbonate in 500 L of ethanol, stirred, and then dried at room temperature and then fired. The temperature of the sintered body is raised from room temperature to 500 ° C, the pressure is gradually increased, and the pressure is reduced in a 30 psi atmosphere to obtain a glass fiber compact.

Add 7 g of ethanol and 0.7 g of titaniumethoxide as precursors to the flask and stir thoroughly at room temperature for 30 minutes. Add 15 g of 3-Methacryloxypropyltrimethoxysilane and stir for 1 hour to prepare a mixture. Thereafter, 5 g of hydrochloric acid having a concentration of 1 mol is added to the mixture, and the mixture is stirred at 100 ° C. for 90 minutes and then cooled to room temperature. Subsequently, distilled water was added to the mixture to adjust the pH to 2.5, and 3 g of Glycidyl Methacrylate was added as an adhesive. The mixture was stirred at room temperature for 1.5 hours to prepare a coating solution.

The glass fiber preform thus prepared is put into the prepared coating solution, stirred and dried for 5 hours.

The thus-prepared glass fiber formed body was tested as follows.

The raw sewage discharged from the restaurant in the factory is used as raw water. The reaction tank is 1,000 mm (W) x 1,000 mm (L) x 500 mm (H), and the filter material is filled with 50% (volume) of the reaction tank. The raw water is introduced into the reaction tank. At this time, pH 6.5 to 7.5, DO 2.0 to 3.5, and raw water temperature of 20 ° C were maintained in the reaction tank.

In addition, a weighing tank was installed in the storage tank and was introduced into a constant amount of the reactor using an airlift having a capacity of 20 l / min. In order to activate the microorganisms in the reaction tank, the microorganism was added to the reactor, followed by air bombing for one week, and then maintained for 1 month. After that, the water quality was analyzed for 2 months.

division Classification 1 time Episode 2 3rd time Average Treatment efficiency BOD SS BOD SS BOD SS BOD SS BOD SS 1 ~ 2 weeks
Influent 96.0 79.5 100.3 88.1 103.1 78.9 99.8 82.2 89.1
86.2
Processing unit 10.9 11.8 11.0 11.3 10.7 10.8 10.9 11.3 3 ~ 4 weeks
Influent 107.5 101.3 105.1 98.7 102.9 96.9 105.2 99.0 90.1
91.1
Processing unit 10.5 8.6 10.1 8.9 10.5 9.0 10.4 8.8 5 ~ 6 weeks
Influent 88.9 75.9 91.7 80.1 90.5 80.4 90.4 78.8 92.7
93.3
Processing unit 6.8 5.5 6.3 4.9 6.6 5.4 6.6 5.3 7 ~ 8 weeks
Influent 104.2 100.5 110.0 97.9 108.3 99.2 107.5 99.2 93.5
92.3
Processing unit 6.9 7.8 7.1 7.7 7.1 7.5 7.0 7.7

The inflow water treatment efficiency of Table 1 shows that the filter material obtained from the pores and the surface treatment can be used as a material for sewage treatment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims (3)

As a method for producing filter media to be introduced into sewage and sewage,
Disrupting the fiber-reinforced plastic to a predetermined particle size;
Firing the fiber-reinforced plastic to obtain a glass fiber lump;
A step of obtaining a glass fiber formed body by immersing and firing a glass fiber lump in a mixed solution obtained by mixing an additive with a binder,
And a step of modifying the surface of the glass fiber compact.
The method according to claim 1,
Further comprising the step of cleaning the glass fiber lump between the step of obtaining the glass fiber lump by firing the fiber-reinforced plastic and the step of obtaining the glass fiber molded product.
The method according to claim 1 or 2,
Wherein the binder is prepared by mixing phenol resin with ethanol, and the additive is calcium carbonate.

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