JP6872679B2 - Method for producing antibacterial agent containing scallop shell powder and method for producing antibacterial aqueous solution - Google Patents

Description

The present invention relates to effective utilization of marine waste such as shells. Most of the marine waste such as shells is discarded as unused and is regarded as waste. The present invention relates to a method for producing an antibacterial agent composed of granulated bodies and molded bodies using these shells as raw materials, and a method for producing an antibacterial aqueous solution.

Shells such as scallops have been left unattended for many years and have become a problem. As a material for utilizing this shell, shell calcium, which is a natural resource, is used as a feed, fertilizer, and soil conditioner containing calcium as a main component. (Patent Document 1)

In addition, it is known that the effect as a disinfectant and an antibacterial agent can be obtained by the oxides such as calcium oxide and calcium carbonate, which are the main components of the shell, which are produced by changing the components of the shell by the firing treatment of the shell. There is. (Patent Document 2)
An antibacterial aqueous solution obtained by dissolving an antibacterial agent produced by oxidatively firing shell powder in water to obtain a strong alkaline aqueous solution is known. (Patent Document 3)

However, most of the above are used in powder, and there is a problem that it is difficult to use in powder, and granulation has been desired. As a method for producing a granulated product, a granular shell material is known in which shell powder is mixed with an additive of magnesium oxide, magnesium carbonate, or phosphoric acid and granulated under pressure. (Patent Document 4)

Japanese Unexamined Patent Publication No. 2004-300237 JP-A-2002-234807 Japanese Unexamined Patent Publication No. 2011-207779 Japanese Unexamined Patent Publication No. 2008-297190

As shown in Patent Documents 1, 2 and 3 above, those using calcium, which is a component of shells, and those using antibacterial properties produced by firing shells are known, but in each case, shells are used. It is used in the form of crushed powder, and there is a problem that it is difficult to use in powder form.
Further, in Patent Document 4, powder obtained by crushing shells is granulated by mixing with an additive, and the diameter is larger than that of granules and the handling size is large. In order to effectively utilize the shells, the powder is mixed with a drug. Granulation and molding by mixing with cheap and easily available ones, instead of granulation in, can easily produce granules and moldings with a particle size that are easy to handle, which is an advantage of shells. It is an object of the present invention to provide granules and molded bodies containing scallop shell powder for utilization as an antibacterial agent or the like by firing and firing.

The present invention has been made to achieve the above object, and in the first invention, scallop shells are washed and then pulverized to obtain a powder having a particle size of 1.0 mm or less, and clay and the shell powder are mixed from 7: 3 to 7. 6 were mixed with 4, after a mixture has been granulated or molded, creating a granulate or molded scallop shell powder containing which comprises firing at 1000 to 1200 ° C..

This is a method for producing an antibacterial agent, which comprises immersing a prepared granulated body or molded body containing scallop shell powder in water and drying it.

Invention Ru manufacturing method der antibacterial aqueous solution comprising an antimicrobial agent comprising a granule or molded scallop shell powder containing created from an alkali aqueous solution obtained by immersion in water at 1.

According to the present invention, scallop shell powder and inexpensive and easily available clay are mixed, granulated or molded, and solidified by firing. Unlike powder, it is easy to handle. It is possible to produce an antibacterial agent having an excellent bactericidal effect by using an environmentally friendly natural material.

Further, according to the present invention, since the raw material is a natural material, it can be provided as a safe antibacterial agent for the human body, and can be disposed of without contaminating wastewater and soil. Further, with respect to the granulated body and the molded body made of a mixture of clay and scallop shell powder, those having an appropriate size can be prepared, so that the size can be adjusted according to the application. For example, by mixing a granulated body having a small particle size with sand used for cats and the like, it is possible to reduce the growth of germs and the odor due to antibacterial properties. Further, by spraying on a sandbox or the like, the propagation of various germs can be reduced.

Further, according to the present invention, it can be used for antibacterial and sterilization by spraying it as an alkaline aqueous solution having a pH of 9 or higher on kitchen utensils, kitchen fukins, kitchen waste, sinks, sewage and the like. It can also be used to deodorize putrefactive odors and ammonia odors.

It is a process diagram which shows the manufacturing process of the antibacterial agent of this invention. It is a photograph which shows the thing molded by the mold of this invention. It is a test test report showing the antibacterial property of the antibacterial agent of the present invention. It is a test inspection report which shows the antibacterial property of the alkaline aqueous solution of this invention.

In the present invention, as shown in the manufacturing process of FIG. 1, scallop shells are washed, dried, and then pulverized. An antibacterial agent consisting of a powdered shell powder mixed with clay, granulated or molded, dried, fired , immersed in water and dried, and the granulated body or molded body immersed in water and dried. A production method and a method for producing an antibacterial aqueous solution obtained by immersing the antibacterial agent in water.

Each process will be described.
1. Cleaning step After the scallop shells were roughly washed, they were washed with water under high pressure.
Using a washing machine (type: NRSEN-1), put 10 kg of scallop shells in 50 liters of capacity water of the washing machine, add 20 ml of 6% sodium hypochlorite, and water pressure is 0.4 Ps by a submersible pump. The scallop shells were washed for 10 minutes with the water pressure of.
Depending on the degree of dirt on the shell, the amount of sodium hypochlorite to be added is adjusted to 3 to 5% of the amount of water, the water pressure in the submersible pump is adjusted to 0.3 to 0.8 Ps, and cleaning is performed depending on the degree of cleaning. Adjust the time.

2. Drying step After washing, take out the scallop shells from the washing machine, put them in a basket, and let them air dry in a shaded place for 5 to 7 days.

3. 3. Crushing process After washing, the dried scallop shells were crushed by a crusher (type SFS manufactured by Mikata Seisakusho).
The shells were crushed by a crusher to a diameter of about 0.3 to 3.0 mm.
The crushed powder particles were pulverized to a particle size of 0.5 mm or less, a particle size of 1.0 mm or less, and a particle size of 3.0 mm in granulation with a granulator after mixing with clay in a subsequent granulation step. I compared things.
Among the mixtures with clay, those crushed to a particle size of 0.5 mm or less and a particle size of 1.0 mm or less could be easily granulated, but those crushed to 3.0 mm or less were difficult to granulate. In the case of granulation, the finer the particle size of the powder, the easier it is to granulate, but the finer the powder, the more cost and time it takes. Therefore, the particle size of the powder is set to 1.0 mm or less.

4. Mixing process with clay As the clay, the clay used in Mashiko ware, specifically, Mashiko porcelain soil (sales destination: Mashiko ware cooperative) was used.
As the clay to be used, any clay-based soil can be used.
A mixture of clay and shell powder crushed to a particle size of 1.0 mm or less at a ratio of 5: 5, 6; 4, 7: 3 was compared. Depending on the water content of the clay, some water was added to make it easier to mix, and the mixture was kneaded for 30 minutes. The state of the mixture was as soft as an earlobe.
As for the mixing ratio, in the subsequent granulation in the granulation step, the granulation condition was compared at the ratio of clay amount: scallop shell powder amount, 5: 5.6: 4, and 7: 3.
The ratio of clay amount: scallop shell powder amount, 7: 3, 6: 4 could be granulated, but 5: 5 could not be granulated. From this, the ratio of clay to scallop shell powder was set to 7: 3 and 6: 4.

5. Granulation and molding Granulated bodies and molded bodies were prepared using a mixture of clay and scallop shell powder in a predetermined ratio.

5-1. Granulation process Clay: A mixture of scallop shell powder in a ratio of 7: 3 and 6: 4 is used in a granulation machine (Model Balance Gran 2L, manufactured by Akira Kiko), and the number of rotations and time are adjusted to the specified size. Granulation was performed after changing. For granulation, 1 kg of a mixture adjusted to a predetermined ratio was placed in a granulator to perform granulation.
If the number of revolutions of the propeller of the granulator is high, fine-grained granulation can be produced, and if the number of revolutions is low, granulated bodies with large particle size can be produced. Granulation with a particle size of 1 to 2 mm can be produced at 200 rpm for 1 hour, and granulation with a particle size of 5 to 6 mm can be produced at 500 rpm for 30 minutes. I was able to do it.

5-2, Molding process Based on the results of granulation of 5-1 in a pre-made round mold or formed mold, a mixture of clay and scallop shells in a mixing ratio of 7: 3 and 6: 4 was used, and after molding. , Die-cut. As the molded body, the one shown in FIG. 2 was prepared.
The granulated and molded products were arranged on a table and dried in the shade for 3 days and in the sun for 1 day.

6 . Baking step After drying, the granulated or molded product was fired at 1000 ° C., 1100 ° C., 1200 ° C., 1250 ° C. The firing was performed at a specified temperature for 1 hour after reaching a predetermined temperature.
In the firing, the granulated product produced by firing at each calcined temperature was placed in 50 ml of water, and the alkali value was measured 2 hours later and the shape of the granulated product was judged.

As the granulated body, a granulated body obtained by granulating with a mixing ratio of clay: shell powder of 7: 3 and having a particle size of about 1 mm and 10 mm and firing was used.
Those fired at 1000 ° C. and 1100 showed a slightly brittle outer shape, but those fired at 1100 ° C. were lighter than those fired at 1000 ° C. The one fired at 1200 ° C. had some cracks, but a granulated body could be obtained. When fired at 1250 ° C., the clay melted and melted into muddy, and did not retain its original shape.
From the above results, as a result of preparing and evaluating a product fired at 1150 ° C., a product with no cracks in the outer shape and no brittleness was obtained, but as time passed, it became brittle and the prototype was lost. ..
7. Immersion / Drying Therefore, the original shape can be maintained by immersing the fired granules / molded bodies in water (normal temperature) for 1 hour and drying them in the shade for 2 to 3 days.
The same result was shown in the clay: scallop shell powder mixed ratio, granulated at 6: 4.

Regarding the calcined granulated body, a clay: scallop shell powder having a ratio of 7: 3 and granulated to a particle size of about 5 mm was used, and 20 g of the granulated body was placed in 50 ml of water in a container, and the pH was measured by a pH electron meter (Aswan As a result of measurement by (manufactured by Co., Ltd.), after 2 hours, those fired at 1000 ° C. and 1100 ° C. showed a value of pH 11.8, and those fired at 1200 ° C. showed a value of pH 11.9.

The effects of the granulated body and the molded body prepared by the above method were investigated.
1. 1. Antibacterial properties of granulated body A granulated body having a clay: shell powder ratio of 6: 4 and a particle size of about 10 mm was used.
Figure 3 shows the test and inspection report that was commissioned by the Tochigi Prefectural Health and Sanitation Corporation.
From the test report, it can be seen that it exhibits antibacterial properties against Escherichia coli, Staphylococcus aureus, and Salmonella.

2. Antibacterial properties of alkaline aqueous solution Clay: Shell powder was granulated to a ratio of 6: 4 and a particle size of about 10 mm.
Figure 4 shows the test report conducted by requesting the Tochigi Prefectural Health and Sanitation Corporation.
It can be seen that it exhibits antibacterial properties against Escherichia coli and Staphylococcus aureus.

3 . Persistence of alkaline aqueous solution (pH)
(1) Test Example 1
Using a granulated body having a clay: shell powder ratio of 6: 4 and having a particle size of about 10 mm, 200 ml of water was placed in a container, and 20 g of the granulated body was placed. After the immersion time had elapsed, the pH was measured. After the measurement, the water was replaced with fresh water. This was repeated and the measured pH is shown in Table 1. The pH was measured with a pH electron meter (manufactured by AS ONE Corporation).

As is clear from Table 1, the pH tended to decrease slightly as the number of measurements increased, and the pH was 9.3 even after 30 measurements (7 days passed). Moreover, the longer the immersion time, the higher the pH value. From this, the pH was repeated 30 times or more, and an alkaline aqueous solution could be obtained even after 7 days had passed.

(2) Test Example 2
Using granulated bodies having a clay: shell powder ratio of 7: 3 and 6: 4 and having a particle size of about 5 to 8 mm, 200 ml of water was placed in a container, and 20 g of the granulated body was placed. After a lapse of time, the pH was measured. After the measurement, the water was replaced with fresh water. This was repeated and the measured pH is shown in Table 2. The pH was measured with a pH electron meter (manufactured by AS ONE Corporation).

As is clear from Table 2, the pH value tended to decrease slightly as the number of measurements increased. The measurement after 30 times (after 7 days) also showed an alkali value of pH 10 or higher. Moreover, the longer the immersion time, the higher the alkaline value of pH. From this, it can be seen that the pH can be repeated 30 times or more, and an alkaline aqueous solution can be obtained even after 7 days have passed. Regarding the content ratio of clay and shell powder, the higher the shell powder, the higher the pH value.

When making an alkaline aqueous solution using the granulated product of the present invention, an alkaline aqueous solution having a predetermined pH can be obtained by adding the granulated product having a weight of about 10% of the amount of water to water. In addition, the granulated product of the present invention can be used repeatedly, and since it is made of scallop shell powder and a natural product of clay, it is easy to dispose of.
The alkaline aqueous solution of the present invention can be prepared by putting water in a container, adding a granulated body having an amount of about 10% of the amount of water, and immersing the aqueous solution for 2 hours or more. The obtained alkaline aqueous solution can be used by transferring it to a watering can or the like and spraying it as it is or by spraying it with a sprayer.

The granulated product of the present invention can be prepared by immersing it in water to repeatedly make an alkaline aqueous solution 30 times or more or 7 days or more, but it is repeated about 30 times or about 7 days. It is preferable to change to a new granulated product.
By spraying the alkaline aqueous solution of the present invention on kitchen waste, sinks, toilets, shoe racks, sand fields, drains, etc., it is effective in deodorizing odorous places and has antibacterial and bactericidal effects, creating a hygienic environment. be able to.
In addition, since the raw materials are natural products of clay and scallop shells, the alkaline aqueous solution of the present invention can be safely used for deodorization, antibacterial, etc. by soaking in laundry, cutting boards, etc., spraying, spraying in kitchens, work spaces, etc. Can be used.
Further, antibacterial action can be expected by spraying and mixing the fine particles of the granulated product of the present invention in a sandbox or the like.

Claims (2)

After washing the scallop shell, it is dried and crushed to obtain a powder having a particle size of 1.0 mm or less, clay and the shell powder are mixed at a ratio of 7: 3 to 6: 4, and the mixed product is granulated or molded. Production of an antibacterial agent obtained by preparing a granulated body or molded body containing scallop shell powder, which is produced by firing at 1000 to 1200 ° C., and immersing the granulated body or molded body in water and drying. Method. After washing the scallop shell, it is dried and crushed to obtain a powder having a particle size of 1.0 mm or less, and clay and the shell powder are mixed at a ratio of 7: 3 to 6: 4, and the mixed product is granulated or molded. The granulated body or molded body containing scallop shell powder is prepared by firing at 1000 to 1200 ° C., and the granulated body or molded body is immersed in water and dried to obtain an antibacterial agent, and the antibacterial agent is used. A method for producing an antibacterial aqueous solution, which comprises immersing in water to obtain an antibacterial aqueous solution composed of an alkaline aqueous solution.

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