JPH07299126A - Method for cleaning and sterilization - Google Patents

Abstract

PURPOSE:To provide a method for cleaning and sterilization wherein an object can be surely sterilized in a short time and bactericidal activity and kind of a sterilization water can be appropriately changed in accordance with the object. CONSTITUTION:An acidic water and an alkaline water are respectively obtd. on an anode and a cathode in the first electrolytic cell 10. A sodium hypochlorite water soln. is obtd. in the second electrolytic cell 20. When an object is cleaned and sterilized, after it is cleaned with the alkaline water in advance, it is cleaned and sterilized with a sterilization water selected from a group consisting of the acidic water, a mixed water of the acidic water with the alkaline water and a soln. of sodium hypochlorite obtd. by electrolysis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes alkaline water and sterilized water, for example, acidic water and alkaline water obtained by electrolysis, and sodium hypochlorite aqueous solution obtained by electrolysis, for example, food products. And how to clean and sterilize kitchen utensils and workers hands.

[0002]

2. Description of the Related Art Foods such as vegetables, meat and fish, kitchen utensils such as cutting boards, knives, kitchen knives, and hands, and hand washing and sterilization are commercially available aqueous solutions of sodium hypochlorite. A method of sterilizing by immersing these foods, kitchen utensils, and hands in sterilized water such as alcohol having a concentration of 70% or more is used.

[0003]

By the way, in order to surely sterilize foods, kitchen utensils and hands (hereinafter referred to as "objects") by the above-mentioned method, the concentration of sterilizing water should be kept at a concentration having a sterilizing effect. You must be dripping. However, on the other hand, it is not preferable to use sterilized water with a high concentration such that odor and sterilized water components remain on the object after the sterilization treatment. Therefore, when sterilizing an object, it is necessary to precisely control the concentration of sterilizing water. However, in the above-mentioned conventional method, since the sterilization treatment is performed by immersing the object in the stored sterilizing water, it is necessary to measure the sterilizing power (concentration) of the sterilizing water at any time and adjust the concentration. Is required. In addition, in the above-mentioned conventional method, it is necessary to immerse the object in sterilized water for a considerable time in order to reliably sterilize the object. Can not be done.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can surely sterilize an object in a short time, and the sterilizing power and type of sterilizing water can be appropriately changed depending on the object. It is an object to provide a cleaning and sterilizing method that can be changed.

[0005]

In order to achieve the above object, in the present invention, an object is preliminarily washed with alkaline water and then the object is sterilized by sterilizing water. The alkaline water is alkaline water obtained by electrolysis, the sterilizing water is different from the acidic water and acidic water and alkaline water mixed water obtained simultaneously with the alkaline water by the electrolysis and the electrolysis. The sterilizing water selected from the group consisting of an aqueous solution of sodium hypochlorite obtained by electrolysis of 1.

[0006]

According to the cleaning and sterilizing method of the present invention,
Since it is washed with alkaline water as a pretreatment for washing with sterilized water, it is possible to remove in advance organic stains such as proteins adhering to the surface of the object and lipid stains such as fats and oils. . Therefore, since the surface of the bacteria buried inside these stains is exposed and comes into direct contact with sterilizing water, the sterilizing effect is enhanced, and efficient sterilizing treatment can be performed in a short time. Therefore, it is possible to easily perform the cleaning and sterilizing treatment even when the kitchen is busy.

As the above-mentioned alkaline water, for example,
There is alkaline water obtained by electrolysis, and as the sterilizing water, for example, acidic water and acidic water obtained at the same time as the alkaline water by the electrolysis and mixed water of the alkaline water and the electrolysis are There is sterilizing water selected from the group consisting of another aqueous solution of sodium hypochlorite obtained by electrolysis, and the sterilizing water used depending on the object can be appropriately selected.
Acidic water (containing hypochlorous acid) obtained by electrolysis has an instantaneous and strong bactericidal power, and
The aqueous solution of sodium hypochlorite has a bactericidal effect with a gradual effect. For example, for foods that contain acid-weak components or for objects where residual sterile water is not desirable, it is easy to use an appropriate mixture of acidic water and alkaline water. .

As the above-mentioned alkaline water, alkaline water obtained by electrolysis is used, and as the above-mentioned sterilizing water, acidic water obtained simultaneously with the alkaline water by the electrolysis or mixed water of the acidic water and the alkaline water is used. When used, sterilizing water can be easily obtained together with alkaline water used for pretreatment of sterilization treatment from acidic water and alkaline water obtained in a single electrolyzed water generator. Also, in this case, after washing and sterilization, acidic water and alkaline water are mixed (this mixing may take some time lag) and are neutralized to some extent before being discharged. Corrosion is less likely to occur, and environmental impact can be almost eliminated. On the other hand, when an aqueous sodium hypochlorite solution that can be generated by electrolysis is used as sterilizing water,
Since radical hydroxyl groups and radical oxygen are contained as compared with the conventional commercially available sodium hypochlorite aqueous solution, the bactericidal effect is high and more efficient cleaning and sterilization can be performed.

[0009]

Embodiments of the present invention will be described with reference to the drawings. (Apparatus) FIG. 1 is a schematic view of an apparatus for carrying out the cleaning and sterilizing method of the present invention. The device electrolyzes the saline solution supplied from the electrolytic water supply pipe 11 between the anode and the cathode to adjust the pH to 2
~ 3 acidic water (hypochlorous acid water: concentration 40-60ppm)
And a first electrolysis tank 10 having a diaphragm for generating alkaline water having a pH of 11 to 12, and an acidic water storage tank 12 and an alkaline water storage tank for respectively storing both water generated in the first electrolysis tank 10. 13, and a second electrolysis tank 20 having no diaphragm for electrolyzing the saline solution supplied from the electrolyzed water supply pipe 21 between the anode and the cathode to generate a sodium hypochlorite aqueous solution, and the second electrolysis tank 20. 2. A sodium hypochlorite aqueous solution storage tank 22 for storing the sodium hypochlorite aqueous solution generated in the electrolysis tank 20. And these storage tanks 1
The acidic water, alkaline water, and sodium hypochlorite aqueous solution stored in 2, 13, and 22 are opened / closed valve 1
By the operation of 6, 17, and 24, each outlet 1
It is configured so that it can be discharged from 4, 15, and 23 as needed.

(Experimental example: Washing and sterilization of chicken fillet) When sterilizing chicken fillet according to the method of the present invention using the apparatus constructed as described above, first, an opening / closing valve 17 for alkaline water is used. After the alkaline water is discharged from the discharge port 15 by the above procedure to wash the chicken breast sample for a predetermined time, the alkaline water opening / closing valve 17 is closed, and then the acidic water opening / closing valve 16 is opened to use this sample with acidic water. For a predetermined time. FIG. 2 is a graph showing the bactericidal effect when the chicken breast fillets of Samples 1 to 6 are washed and sterilized according to the method of Example 1. Further, as a comparative example to Example 1, chicken breast fillets of Samples 7 to 12 are washed and sterilized for a predetermined time using only acidic water. FIG. 3 is a graph showing the bactericidal effect when cleaning and sterilizing in this comparative example.

As is apparent from the graphs shown in FIGS. 2 and 3, according to the method of the present invention, a reliable sterilizing effect can be obtained in a shorter time as compared with the case where washing and sterilization is performed using only acidic water. be able to. For example, according to the method of the present invention, which performs washing for 30 seconds on average with alkaline water, and then for 17 seconds on average with washing with acidic water, as compared with the method of the comparative example which performs washing on average for 60 seconds only with acidic water. Can kill most bacteria. This is because protein and lipid stains on the chicken fillet surface can be removed by washing with alkaline water in advance, and since the treatment with acidic water is performed with the bacterial surface exposed, efficient sterilization can be performed. It can be considered as a trick.

In addition, FIG. 4 shows that after the alkaline water opening / closing valve 17 is operated, alkaline water is discharged from the outlet 15 to wash the cutting board and the hand for a predetermined time, and then the alkaline water opening / closing valve 17 is closed. Experimental results when the opening / closing valve 16 for acidic water is opened and the above cutting board and hands are washed with acidic water for a predetermined time respectively,
As a comparative example to this experimental result, the opening / closing valve 16 for acidic water is opened and a cutting board or a hand is used for a predetermined time with acidic water (corresponding to the time obtained by adding the above-mentioned cleaning time with alkaline water to the above-mentioned cleaning time with alkaline water). It shows the experimental result when washed. The bactericidal effect of the method of the present invention can be understood from the results of this experiment.

(Other Experimental Examples) In addition to the cutting board described above, a kitchen knife, a dishcloth,
Even kitchen utensils such as a workbench can be washed and sterilized with acidic water after being washed with alkaline water.
Further, in order to sterilize an object such as food made of a material that is weak against acid by using the apparatus configured as described above, first, the alkaline water opening / closing valve 17 is operated to discharge the alkaline water to remove the object such as food. After washing for a specified time, open / close valve for acidic water 1
6 is also opened, and this object is washed for a predetermined time using mixed water of acidic water and alkaline water as sterilizing water. As a result, the object can be efficiently sterilized without damaging it.

Further, as the sterilizing water, an aqueous solution of sodium hypochlorite produced in the second electrolysis tank 20 may be used for washing and sterilization. Then, after the cleaning treatment with the aqueous solution of sodium hypochlorite, if the post-treatment is carried out using the acidic water from the discharge port 14, even if chlorine is left on the object after the sodium hypochlorite is washed. Can be removed. In addition, it is also possible to carry out an antioxidant treatment using alkaline water or mixed water after washing and sterilizing with acidic water. The output of these treated water is controlled by the open / close valve 1.
It can be done easily by simply operating 6, 17, and 24.

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus for carrying out the cleaning and sterilizing method of the present invention.

FIG. 2 is a graph showing the bactericidal effect when the chicken breast fillets of Samples 1 to 6 are washed and sterilized according to the method of the present invention.

FIG. 3 is a graph showing the bactericidal effect when the chicken breast fillets of Samples 7 to 12 are washed and sterilized in the comparative example.

FIG. 4 is a diagram showing the sterilizing effect when the cutting board and the hands are washed and sterilized according to the method of the present invention, and the sterilizing effect when the cutting board and the hands are washed and sterilized with only acidic water as a comparative example.

[Explanation of symbols]

10 ... 1st electrolysis tank, 12 ... Acidic water storage tank, 1
3 ... Alkaline water storage tank, 20 ... 2nd electrolysis tank, 22 ... Sodium hypochlorite aqueous solution storage tank.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Okada 3-16, Hoshizaki Electric Co., Ltd., Sakaemachi South Building, Toyoake City, Aichi Prefecture (72) Inventor, Toyoaki Nasu 3-16, Sakaemachi South Building, Toyoake City, Aichi Prefecture Hoshizaki Electric Co., Ltd. In (72) Inventor, Mamoru Ishikawa, 3-16, South Building, Sakaemachi, Toyoake-shi, Aichi Hoshizaki Electric Co., Ltd.

Claims (2)

[Claims] 1. A cleaning and sterilizing method comprising preliminarily cleaning an object with alkaline water, and then sterilizing the object with sterilizing water. 2. The alkaline water is alkaline water obtained by electrolysis, and the sterilizing water is acidic water obtained at the same time as the alkaline water by the electrolysis, a mixture of the acidic water and the alkaline water, and 2. The cleaning and sterilizing method according to claim 1, wherein the sterilizing water is selected from the group consisting of an aqueous sodium hypochlorite solution obtained by electrolysis other than electrolysis.