JPH11179117A - Antibacterial filter medium, manufacture of antibacterial filter medium, and filter device comprising antibacterial filter medium layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter medium having significantly efficient antibacterial function to Escherichia coli O-157 and other types of Escherichia coli, its manufacturing method, and a laminated filter apparatus employing the filtration material. SOLUTION: This antibacterial filter medium is produced from a fine powder 1 of oyster shell, zeolite 2, and sodium silicate 3 in a proper mixing ratio and manufacturing method of the material includes processes of kneading the mixture of fine powder 1, zeolite 2, and sodium silicate with a proper amount of water, granulating 4 the resultant mixture into 4-5 mm particle diameter, and firing the granulated material at about 1,000-1,200 deg.C. This filter device comprises a filtration tank containing the antibacterial material layer in the lower layer part and filter sand in the upper layer part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium which can be widely applied to general water treatment including water supply and sewerage, and a filter apparatus using the filter medium.

[0002]

2. Description of the Related Art Generally, filtered sand, anthracite, other artificial sand,
A sand filter system is used, in which the gravel supported by each mesh is used, and as a device, raw water is guided over sand or the like, passes through the gravel, and is discharged as filtered water from the opposite side.

However, recently, the environment has been polluted, and the outbreak of mass plague using water as a medium represented by Escherichia coli O-157 and the like is becoming a serious social problem. The situation is that it cannot be adapted by the device using it.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and uses oyster husks, which have been focused on antibacterial action, for Escherichia coli O-157 and other Escherichia coli. An object of the present invention is to provide a filtering material having a remarkable antibacterial action and a laminated filtering device using the filtering material.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a method of kneading oyster husk fine powder 2, zeolite 1, and sodium silicate 3 by mixing appropriate amounts of each mixture with water as a medium. It is an antibacterial filtration material formed by baking particles 4 at a high temperature.

Then, oyster shell fine powder 2 and zeolite 1
And an appropriate amount of sodium silicate 3 to which water is added and kneaded, granulated 4, and then fired at a high temperature to produce an antibacterial filter material.

[0007] Further, the antibacterial filter material having the above-described structure is supplied to the filter tank 5.
This is a filtration device in which a filter sand 6 is laminated on an upper layer in a lower layer.

Further, in the above-mentioned apparatus, there is provided an antibacterial filter laminated filter in which the filter sand 6 is artificial sand.

DETAILED DESCRIPTION OF THE INVENTION Ingredient ratio Fine oyster shell powder 30% Zeolite 65% Sodium silicate (as a binder) 5%

As shown in FIG. 1, raw oyster hulls were first pulverized to about 10 mesh 2 and natural zeolite 1
Then, an appropriate amount of water is added to the above-mentioned distribution ratio of sodium silicate 3, and the mixture is sufficiently kneaded. Then, the mixture is granulated to a diameter of about 5 mm by a granulator, and finally, it is subjected to caking and firing at about 1200 ° C. Obtain a white antibacterial filter.

As shown in FIG. 2, the antibacterial filter material obtained as described above is laminated on the lower layer of the filter tank 5, and the filter having an effective diameter of 0.6 m / m to 1.6 m / m is formed in a hard quartz material. This is a filtration device in which sand 6 is laminated on the upper layer.

[0011]

Now, the case of purifying the pool sewage by the filtration device of the present invention will be described.
The sewage introduced from a is filtered sand 6
Adsorbs colloidal particles in water in the process of passing through. In this case, if an appropriate amount of coagulant is added to form a floc in order to make the gap between the filter sands 6 finer, the adsorption rate of the particles can be increased. Thus, the sewage is physically purified and reaches the lower part of the filtration tank 5.

In the process of passing through the lower layer, the granular antibacterial filter material becomes porous zeolite 1 per unit.
And a fine powder 2 of oyster hulls having a remarkable antibacterial effect on Escherichia coli O-157 and other Escherichia coli are kneaded sufficiently by adding sodium silicate 3, and at about 1200 ° C. after granulation. Since it is formed by caking and baking, it contains a large amount of oyster shell fine powder 2 in its porous structure in addition to the adsorption capacity of zeolite itself, and has an antibacterial effect on Escherichia coli and the like contained in water. Antibacterial purified water for these bacteria is led out from the outlet 5b of the filtration tank 5.

[0013]

As described above, the present invention forms a caking granule morphologically, so that it is easy to handle and, of course, has the same supporting function as a supporting gravel as a solid in a filtration device. And systematically, in addition to the adsorption capacity of zeolite itself, it is derived as antibiotic purified water by the antibacterial action of oyster shell fine powder adhering to the porous surface, and it can be widely applied to water treatment including water supply and sewerage. It is extremely effective as a material and a filtering device for countermeasures against water from environmental pollution.

The production method is also a simple process of compounding, kneading, granulating, and firing. Since both zeolite and oyster hull can be filled with natural waste, there is an advantage that mass production can be performed at low cost.

[Brief description of the drawings]

FIG. 1 is a flow chart showing the production process of the antibacterial filter material of the present invention.
FIG.

FIG. 2 is a schematic longitudinal sectional side view of the antibacterial filtration material laminated filtration device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Zeolite 2 Fine powder of oyster shell 3 Sodium silicate 4 Granulation 5 Filtration tank 6 Filtration sand

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 531 C02F 1/50 531J 540D 540 550B 550 560Z 560 B01D 29/08 520A 530D 540A

Claims (4)

[Claims] An appropriate mixing ratio of fine powder of oyster shell (2), zeolite (1) and sodium silicate (3) is kneaded using water as a medium, granulated (4) and fired at a high temperature. Antibacterial filter material. 2. An oyster shell fine powder (2), zeolite (1), and sodium silicate (3) are mixed with water at an appropriate mixing ratio, kneaded, granulated (4), and fired at a high temperature. A method for producing the obtained antibacterial filter material. 3. An antibacterial filtration material laminated filtration device comprising the antibacterial filtration material of claim 1 laminated on a lower portion of a filtration tank (5) and a filtration sand (6) on an upper layer portion. 4. The filter according to claim 3, wherein the filter sand is artificial sand.