JPH0457726A - Sterilizing method for water and stelirizing member - Google Patents

Abstract

PURPOSE:To obtain a sterilizing method for water, which does not alter the taste of water and a sterilizing member used for this sterilizing method by bringing micro- particles of semi-conductor, which becomes a battery by casting of light, into contact with water. CONSTITUTION:As a semi-conductor which becomes a battery by casting of light, TiO2, CdS can be named, and it is preferable to use as highly activated micro-particles. For the application, the semi-conductor micro-particles are packaged by a water permeable material with pores of a size which does not let the micro-particles of the semi- conductor pass through, or the micro-particles of the semi-conductor are fixed on a unwoven fabric sheet, film or a steel wool state resin, or the micro-particles are kneaded in a resin. When water is sterilized while being filled in a transparent container, a sterilizing member A is placed in a container B and brought into contact with water, or a sterilizing member C made of a film in which micro-particles of the semi-conductor are kneaded may be used as a part of a container D to bring the sterilizing member C into contact with water. At this time, the containers B, D are transparent containers, however, they do not have to be totally transparent, and they shall have a transparent part for a range in which light can be cast on the sterilizing members A, C.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for sterilizing water such as mineral water that can be stored for a long period of time without reducing the taste thereof, and a sterilizing member used in this sterilizing method.

[Conventional technology]

Currently, bottled mineral water is sold for use in diluting whiskey, etc., but if sterilization methods are not appropriate, the water may spoil during storage.

Furthermore, depending on the sterilization method, the original taste of mineral water may be lost.

On the other hand, in case of a disaster such as an earthquake, water is placed in a container and placed in an emergency bag along with other emergency items.

However, if you keep water in a container like this, it will spoil, so you have to replace the water in the container from time to time.
It was quite a tedious task.

[Problem to be solved by the invention]

An object of the present invention is to provide a water sterilization method that does not use special chemicals and does not reduce the taste of water, and a sterilization member used in this sterilization method.

[Means for Solving the Problems] The present invention is a method for sterilizing water, which is characterized by bringing water into contact with fine semiconductor particles that will become a battery by irradiation with light.

In the invention, there is provided a method for sterilizing water in which the water is filled in a transparent container.

Further, the present invention is a sterilizing member that is used in the water sterilization method and is made of a nonwoven sheet film or a steel wool-like mass to which fine semiconductor particles that become a battery are fixed by irradiation with light.

[Effect]

Semiconductors that become batteries when irradiated with light are excited by light irradiation, polarization occurs, and electrons are added to or taken from oxygen and hydroxyl groups present in water, forming superoxide radicals and hydroxyl groups. Radicals are generated.

These radicals have strong oxidizing and reducing powers and affect the enzymes of microorganisms, killing them in a short period of time.

Specific examples of the semiconductor that becomes a battery upon irradiation with this light include TiO□ and CdS, and it is preferable to use them as highly activated fine particles.

When using these semiconductor particles, they should be packaged in a water-permeable material with holes large enough to prevent the semiconductor particles from leaking, or wrapped in a nonwoven sheet, film, or steel wool-like resin to which the semiconductor particles are fixed. It can be used by kneading it into resin.

In addition, when filling water in a transparent container and sterilizing it, the first
As shown in the figure, the sterilizing member (A) is housed in a container (B) and brought into contact with water, or as shown in Fig. 2, the sterilizing member (C
) may be used as the - part of the container (D) in contact with water.

At this time, the containers (B) and (D) are transparent containers, but they do not need to be completely transparent, and have a transparent portion within a range that allows light to be irradiated onto the sterilizing members (A) and (C).

Moreover, the sterilizing member is not always irradiated with light, but when used in a container, the sterilizing member may be irradiated with light in advance.

Examples of the present invention will be described below.

[Example 1] ], Q3ce l l/ml of Escherichia
Water containing Co11 (Escherichia coli) was placed on a plastic film (area 160 cm2) on which TiO□ fine particles with a particle size of 0.2 mμ were fixed at a flow rate of 16.3 m1/min.
After sterilization by irradiating with a mercury lamp (40 W) for 30 minutes, E. coli was not detected.

[Example 2] Ti particles with a particle size of 0.2 μm were placed in a container consisting of a plastic bottle made of polyethylene ethyphthalate with a capacity of 11,000 ml.
O□ After putting a polyethylene non-woven sheet (area 200 cm) with fine particles fixed on it together with mineral water, sterilize it by irradiating it with a mercury lamp (40 W) for 30 minutes, and then
It was stored at room temperature for 0 days.

Afterwards, when the mineral water in the container was tested, no bacteria were detected.

Moreover, no change in taste occurred.

[Example 3] A polyethylene nonwoven fabric sheet (area 200 cm) on which T i Oz fine particles with a particle size of 0.2 μm were fixed was placed in a container consisting of a plastic bottle made of polyethylene terephthalate with a capacity of 1000 ml, together with mineral water. , and irradiated with a mercury lamp (40 W) for 30 minutes.

Then, when we put an enzyme (mannitol) into the water in the container and checked the effect of the enzyme, we found that the enzyme had no effect and that superoxyrad radicals and hydroxyl radicals had been generated in the water in the container. did.

〔Effect of the invention〕

As described above, the present invention can sterilize microorganisms in water and prevent their proliferation by simply bringing water into contact with a semiconductor to be converted into a battery by irradiating light, so that water can be sterilized without making the taste of the water bad.

For this reason, even if bacteria are mixed in when filling a container with pre-sterilized water, other drugs or
Sterilization is possible without heat treatment.

In addition, the effect of the semiconductor continues even after the bacteria have been killed, so super oxine radicals and bitroxy radicals are generated in the water, ionization of water progresses, and water becomes more delicious.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are explanatory diagrams showing an example of the sterilization method of the present invention. Patent application: Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 1 Figure 2

Claims (3)

[Claims] (1) A water sterilization method characterized by bringing semiconductor fine particles that will become a battery into contact with water by irradiation with light. (2) The method for sterilizing water according to claim (1), wherein the water is filled in a transparent container. (3) A sterilizing member used in the sterilizing method according to claim 1 or 2, which comprises a nonwoven sheet, film, or steel wool-like resin to which fine semiconductor particles that become a battery are fixed by irradiation with light.