JPH09611A - Method for purifying sandbox - Google Patents

Abstract

PURPOSE: To provide such a method by which a sandbox can be efficiently sterilized and purified so that it can be safely used after the purification. CONSTITUTION: This method consists of a first process for scattering on and penetrating into a sandbox 1 a surface purifying liquid 16 which is prepared by dissolving at least either H2 O2 or ClO2 in a solvent nontoxic and capable of natural evaporation, and a second process for stirring the sand after the completion of the first process and after scattering on and penetrating into the sandbox 1 a depths purifying liquid which is prepared by dissolving O3 in a solvent nontoxic and capable of natural evaporation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for purifying a sandbox by sterilizing and purifying bacteria and the like that live in the sand.

[0002]

2. Description of the Related Art In recent years, it has been pointed out that the improvement of living environment in the outdoors is important as the living standard is improved in Japan. The outdoor living environment to be maintained includes, for example, a school playground and a park. In these schoolyards and parks, there are many examples of sandboxes. This sandbox is generally installed mainly for children to touch the sand with their bare hands and enjoy modeling.

[0003]

By the way, in recent years, there has been a problem that the sandbox may be contaminated with bacteria such as pathogenic bacteria and become a hotbed of bacteria. That is, the pollution of the sandbox is mainly caused by the fact that the bacteria of excrement of animals mixed in the sandbox remain in the sand or grow under the conditions, but especially in urban areas, excretion of stray dogs, stray cats, etc. Since the places are concentrated in sandboxes such as schoolyards and parks, bacteria such as pathogenic bacteria increase the degree of pollution of the sandbox, and there is a concern that the health of users will be affected. Especially for children, they often play by touching the sand with their bare hands, which can cause illness. In the case of a sandbox where the sand is not always managed, the sandbox is contaminated with a large amount of dust such as vinyl or plastic containers, or sand particles stick to each other in the sandbox to form a lump. It is easy to make such dust and lumps and a portion where water is retained in the vicinity thereof, but it is considered that the retained portion of the water becomes a hotbed where the bacteria carried through the animal propagate. There is concern that the degree of pollution will be particularly high.

In view of the above problems, in order to sterilize the bacteria in the sand, a method of spraying a bactericide such as an agricultural chemical is applied. However, this method has a problem that a secondary disaster may occur due to the toxicity of the pesticide. There is also a method of heat sterilizing sand using a burner as a method that does not use a bactericide, but this time, because lumps of sand particles tend to condense and form lumps, it is necessary to crush the lumps and flames. When exposed to water, there arises a problem that the components contained in the sand are burnt and discolored.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for purifying a sandbox that can efficiently sterilize and purify the sandbox and can be used safely after the purification. It is what

[0006]

The present invention has the following features to attain the object mentioned above. That is, in the method for purifying a sandbox according to claim 1, a surface layer purification solution obtained by dissolving at least one of H ₂ O ₂ and ClO ₂ in a solvent that is non-toxic and capable of spontaneously evaporating is sprayed into the sandbox to be infiltrated. After the completion of the first step and the first step, the deep purification solution prepared by dissolving O ₃ in a harmless and spontaneously evaporating solvent is sprayed and permeated in the sandbox, and then the second step of stirring the sand Is provided as a means for solving the above problems.

According to a second aspect of the method for purifying a sandbox, which is the method for purifying a sandbox according to the first aspect, after the completion of the second step, a mineral element is dissolved in a non-toxic and naturally evaporable solvent. The third means for spraying the resulting antibacterial liquid to the sandbox to permeate the sandbox is provided as a means for solving the above problems.

[0008]

According to the method for purifying a sandbox according to claim 1,
After sterilizing bacteria such as the surface layer of the sandbox in the step (1), the sterilization is performed deeper than the surface layer in the second step. By doing so, it is possible to efficiently sterilize the entire sandbox without dispersing the bacteria on the surface layer below the surface layer of the sandbox. In addition, since the solution in which H ₂ O ₂ , ClO ₂ and O ₃ are dissolved is H ₂ O ₂ , ClO ₂ and O _{3 which} are naturally harmless after returning to water or gas after spraying. , No harmful substances are left through the second step.

According to the method for purifying a sandbox according to claim 2,
An antibacterial liquid is used to replenish the sand with appropriate mineral elements to create an environment in which non-toxic bacteria can easily grow, and to suppress the growth of bacteria that are harmful to the human body to maintain hygiene.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the sandbox cleaning method of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 is a sandbox, 2
Is a stirrer for stirring the sand in the sandbox 1, 3 is a surface purification liquid storage tank, and 4 is an ozone water producing device. The sandbox 1
As shown in Fig. 1, it is installed in a park, etc., so that people can directly touch it with hands and enjoy modeling, etc. It is placed in the partition wall 5.

The stirring device 2 is provided with a self-propelled mechanism 6, a stirring swirl vane 7 which is rotationally driven by the driving force of the engine of the self-propelled mechanism 6, and a net 8 for collecting impurities from the sand. It has the same configuration as a small-scale cultivator for agriculture. The net 8 is attached to the rear of the stirring swirl blade 7 so as to be inserted into the sand, and collects foreign matters in the sand as the stirring device 2 travels. The net 8 is formed by weaving steel wires or the like at an appropriate pitch. The mesh pitch is selected in accordance with the size of impurities to be separated from the sandbox 1. The stirring device 2 may be a large device such as a tractor as long as it can stir the sand in the sandbox 1.

As shown in FIG. 3, the ozone water producing apparatus 4 includes an ozone generating mechanism 9 for generating ozone, and a gas-liquid mixture for dissolving ozone generated by the ozone generating mechanism 9 in water to generate ozone water. It is provided with a container 10 and a pumping mechanism 12 for pumping the generated ozone water to a water outlet hose 11 and discharging the water. The ozone generating mechanism 9, the gas-liquid mixer 10, and the pressure feeding mechanism 12 are built in a casing 13 having a rectangular parallelepiped casing shape. The ozone generating mechanism 9 is a creeping discharge type flat plate type ceramic ozonizer using a high frequency inverter using a special ceramic resonator, and generates safe and pure ozone. The gas-liquid mixer 10 is adapted to dissolve the ozone generated by the ozone generation mechanism 9 into the water directly introduced from the water supply through the water conduit hose 14. If there is no water supply nearby, the water in the water supply tank brought into the site may be used. A sprinkler 15 for spraying ozone water in a shower shape is attached to the tip of the water outlet hose 11. This sprayer 1
No. 5 is configured so that the operator can easily spray the ozone water to a target place by grasping and operating it by hand.

The ozone water has excellent actions such as sterilization, deodorization, bleaching and other chemical actions, and physiologically action action, oxygen addition action, etc. Exert. The bactericidal action of ozone water is sufficiently exhibited when the amount of dissolved ozone is about 1.0 ppm. Therefore,
Ozone water required for sterilization per square meter of sandbox is 1
The amount is about 70 g, and if the concentration is high, the amount can be further reduced. In addition, ozone water returns to oxygen immediately after being released into the atmosphere, so there is no residual toxin,
It is safe for human health.

In the method for purifying a sandbox of the present invention, first, the sand in the sandbox 1 is agitated by the agitator 2 (see FIG. 1), and at least one of H ₂ O ₂ and ClO ₂ is dissolved in water. The surface layer purification liquid 16 is sprayed on the surface layer of the sandbox 1 to permeate it (see FIG. 2). (First step) The stirring is performed by crushing the aggregated sand lumps to remove the surface purification liquid 16
The purpose is to make it easier for water to penetrate and to remove dust such as empty cans in the sand. The surface purification liquid 16 is converted into water containing H ₂ O ₂ and Cl in the surface purification liquid storage tank 3.
It is generated by dissolving one or both of O ₂ . In order to infiltrate the surface layer cleaning liquid 16 into the sand, the surface layer cleaning liquid 16 in the surface layer cleaning liquid storage tank 3 is sucked by the pump 17, and the pump 1 is passed through the water outlet hose 11 with the sprayer 15.
Using the pumping power of 7, it is evenly distributed over the sandbox 1.
By doing so, the live bacteria on the surface layer of the sand in the sandbox 1 can be sterilized.

Next, as shown in FIG. 3, the ozone water producing apparatus 4 carried into the work site was driven to spray and infiltrate the deep purification liquid 18 obtained by dissolving O ₃ in tap water into the sandbox. After that, the sand is stirred (see FIG. 4), and the deep purification liquid 18 is further sprayed. (Second step) The agitation work between the two sprays of the deep purification liquid 18 is to mix the entire sand to allow the deep purification liquid 18 to permeate the entire sandbox 1 and further crush the aggregated sand lumps into smaller pieces. With the goal. Further, at this time, since the live bacteria on the surface layer of the sandbox 1 are sterilized by the first step, the live bacteria are not scattered over the entire sand by stirring the sand. The deep purification solution 18 is sprayed so that the depth of sand reaches about 50 to 60 cm.

Next, the antibacterial liquid 19 in which a trace amount of a mineral element is dissolved in water is sprinkled on the sandbox to permeate it. (Third Step) The antibacterial agent 19 is water containing a very small amount of so-called minerals, and is stored in the antibacterial liquid storage tank 20, and the sandbox 1 is provided by the pump 17 and the water outlet hose 11 with the sprinkler 15. Disperse evenly throughout. The antibacterial agent 19 may be sprayed by mixing a germicidal enzyme or a microorganism having a germicidal action. As these minerals, bactericidal enzymes, microorganisms having a bactericidal action, etc., nontoxic ones are selected.

The operation and effect of the present invention will be described below. According to the sand purification method of the present invention, the deep purification liquid 18
After the purification by the surface purification solution 16 is performed prior to the purification by, the entire sand is stirred, so that the entire sandbox 1 can be efficiently purified without dispersing the bacteria in the sand. That is, the types of bacteria inhabiting the sandbox 1 are different between the surface layer of the sandbox 1 and the deeper layer. The surface layer of the sandbox 1 forms a habitat layer of various live bacteria including Escherichia coli and Ascaris eggs, and the middle and lower layers form a habitat layer mainly composed of Escherichia coli and Ascaris eggs. (Or more, Nihonjuichikusandaigaku "on-site and measures of microbial contamination in the sandbox of the park" Veterinary Department of Public Health classroom Masatoshi Hayashi professor) to the sterilization of viable cells of the surface layer, H ₂ O _2, ClO ₂
Is effective, and is effective for sterilizing E. coli and roundworm eggs in the middle and lower layers.
₃ is valid. In addition, these H ₂ O ₂ , ClO ₂ , O
_{All of 3} are harmless because they naturally return to water and gas after spraying and dissipate. Further, the surface purification liquid 16 and the deep purification liquid 18 are in a non-toxic state since only water remains after the components are dissipated.

The crushing of the lumps by stirring the sand changes the anaerobic soil into an opportunistic soil, and makes the sand an environment in which Escherichia coli and Ascaris eggs are unlikely to live. In particular, the stirring in the second step significantly restores the air permeability and water permeability of the sand. As a result, the second
The deep purification liquid 18 and the antibacterial agent 19 which are sprayed after the agitation in the step (2) can efficiently permeate the entire sand and exhibit a high bactericidal effect.

The antibacterial agent 19 restores to the sandbox 1 a state close to a natural sandy ground by the contained minerals, and forms an environment in which microbes having a bactericidal enzyme and a bactericidal action are easily propagated. Therefore, by using the antibacterial agent 19 and the microorganism having a bactericidal action in combination, the cleaning of the sandbox 1 can be more effectively maintained.

Therefore, according to the method for purifying a sandbox according to the present invention, the surface purification solution 16 and the deep purification solution 18 are classified by layers of the sandbox 1.
By separately using and, and further sterilizing the bacteria on the surface layer in advance, the bacteria on the surface layer and below can be sterilized without dispersing the bacteria on the surface layer, so that the bacteria in the entire sandbox 1 can be efficiently carried out. Moreover, since the surface purification liquid 16 and the deep purification liquid 18 which are non-toxic and spontaneously dissipate after being sprayed are used consistently in the purification work, unlike pesticides etc., toxic substances may remain after purification. None, it is safe to use the sandbox 1 immediately after the construction is completed. Moreover, since the antibacterial agent 19 is also non-toxic, the sand cleaning can be maintained safely and for a long time. Further, in the purification method of the present invention, the sand agitation work effectively permeates the surface purification liquid 16 and the deep purification liquid 18 into the entire sandbox 1 and, at the same time, restores air permeability and water permeability to the sand. There is no need to separately provide crushing work for lumps, and the work efficiency of purification improves.

The solvent for the surface purification solution 16, the deep purification solution 18 and the antibacterial agent 19 may be, for example, alcohol other than water, as long as it is a solvent that naturally evaporates and dissipates and is harmless.

[0022]

As described above, according to the method for purifying a sandbox according to the first aspect, the surface layer obtained by dissolving at least one of H ₂ O ₂ and ClO _{2 in} a non-toxic and spontaneously evaporating solvent. The first step of spraying and infiltrating the purification solution into the sandbox, and after the completion of the first step, the deep purification solution of O ₃ dissolved in a harmless and spontaneously evaporating solvent is sprayed and infiltrated into the sandbox. After that, by providing the second step of stirring the sand, the surface purification solution and the deep purification solution are separately used for each layer of the sandbox, and the bacteria on the surface layer are sterilized in advance to remove the bacteria on the surface layer. Since the surface layer and below can be sterilized without being dispersed, bacteria in the entire sandbox can be efficiently carried out, and there is no residual toxicity after purification, and it is safe to use immediately after the completion of construction.

According to the method for purifying a sandbox according to claim 2,
After the completion of the second step, by providing the third step of spraying and infiltrating the sandbox with an antibacterial liquid prepared by dissolving mineral elements in a solvent that is non-toxic and capable of naturally evaporating, the sandbox is close to a natural sandy land. It can restore the condition and keep the sand clean safely and for a long time.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a method for purifying a sandbox according to the present invention, and is a construction procedure diagram showing an operation of crushing a lump of sand by stirring a surface layer of the sandbox.

FIG. 2 is a diagram showing an embodiment of the method for purifying a sandbox according to the present invention, which is a construction procedure diagram showing the spraying of the surface purification liquid.

FIG. 3 is a diagram showing an embodiment of the method for purifying a sandbox according to the present invention, and is a construction procedure diagram showing the spraying of the deep purification liquid.

FIG. 4 is a diagram showing an embodiment of the method for purifying a sandbox according to the present invention, and is a construction procedure diagram showing an operation for stirring the sand in the sandbox to infiltrate the deep purification solution into the entire sand.

FIG. 5 is a diagram showing an embodiment of the method for purifying a sandbox according to the present invention, which is a construction procedure diagram showing spraying of an antibacterial agent.

[Explanation of symbols]

 1 Sandbox 16 Surface purification liquid 18 Deep purification liquid 19 Antibacterial liquid

Claims (2)

[Claims] 1. A method for purifying a sandbox by sterilizing and purifying bacteria living in the sand, which comprises dissolving at least one of H ₂ O ₂ and ClO ₂ in a solvent that is non-toxic and capable of spontaneous evaporation. A first step of spraying and infiltrating the surface purification solution (16) on the sandbox (1);
After the completion of the above step, a second step of spraying a deep purification solution (18) prepared by dissolving O ₃ in a harmless and spontaneously evaporating solvent into a sandbox to infiltrate the sand, and then stirring the sand. A method for purifying a sandbox. 2. The method for purifying a sandbox according to claim 1, wherein after the completion of the second step, an antibacterial liquid (19) obtained by dissolving a mineral element in a solvent that is non-toxic and capable of naturally evaporating is placed in the sandbox. A method for purifying a sandbox, comprising a third step of spraying and permeating.