JP4570922B2 - Method and apparatus for producing sterilizing water - Google Patents

Description

The present invention relates to a manufacturing ZoSo location of sterilizing water for the production of high sterilization effect sterilizing water.

Conventionally, sterilized water used for washing food such as vegetables, meat, and fish, washing dishes, disinfecting medical instruments, and disinfecting workplaces is known. This sterilizing water is produced by using neutral water such as tap water or well water as raw water, and adding and mixing an acid such as sodium hypochlorite (NaOCl) and hydrochloric acid (HCl) to the raw water. The produced sterilizing water contains free effective chlorine having a sterilizing action, hypochlorous acid (HOCl) and hypochlorite ion (OCl ⁻ ). In particular, hypochlorous acid has a strong sterilizing power, and sterilizing water containing a large amount of hypochlorous acid has a high sterilizing effect. For example, sterilizing water having a high free effective chlorine concentration and containing a large amount of hypochlorous acid, and acidic sterilizing water in the range of pH 4 to pH 5 in which 100% of free effective chlorine is hypochlorous acid has a high sterilizing effect. .

  However, when sodium hypochlorite and acid are added and mixed to produce sterilized water with a high sterilizing effect, chlorine gas is generated due to the reaction of sodium hypochlorite and acid, which is very dangerous to the human body. It was. Thus, conventionally, a method and apparatus for producing hypochlorous acid-containing sterilizing water that hardly generates chlorine gas have been proposed (see, for example, Patent Document 1).

JP-A-11-188083

  The conventional method for producing sterilizing water is the addition of sodium hypochlorite and acid to raw water introduced into one mixing section so that it is maintained within a specific pH value or a specific free effective chlorine concentration range. The amount was added and mixed. Moreover, in order to suppress generation | occurrence | production of the chlorine gas by reaction, sodium hypochlorite and an acid were made to react slowly, not adding sodium hypochlorite and an acid simultaneously. Furthermore, sodium hypochlorite and acid were added in small portions to suppress rapid fluctuations in pH value. However, in the above production method, sodium hypochlorite and acid are added to one mixing part, and the added sodium hypochlorite and acid may react to generate chlorine gas. there were. Therefore, in the conventional method for producing sterilizing water, it is necessary to provide a gas absorption part for absorbing chlorine gas on the downstream side of the mixing part as necessary.

Manufacture of sterilizing water in the present invention, in order to solve the above problem, by using a device having a plurality of mixing means provided in the middle of the fluid inlet passage and the fluid inlet passage for introducing the raw water, the fluid introduced a method of manufacturing a sterilizing water mixed using a sequential addition to the mixing means and a hypochlorite of sodium and an acid into the passageway, the hypochlorous acid sodium were added and mixed to the raw water, the mixture neutralized by admixing prior hexane to sterilizing water produced provided the production system neutral sterile water to sterilizing water neutral in parallel by the two generation system, bypass passage having a switching valve The neutralized sterilized water of both of the production systems is produced by merging the two production systems in parallel or in series by switching the switching valve. It is what I did.

In order to solve the above problem, the sterilizing water production apparatus of the present invention includes a water supply passage for supplying raw water, two fluid introduction passages for introducing raw water supplied by the water supply passage, and sterilizing water flowing through each fluid introduction passage. Sterilizing water supply passage for supplying the outside, first mixing means and second mixing means provided in order toward the downstream side in the middle of the one fluid introduction passage, and downstream in the middle of the other fluid introduction passage A third mixing means and a fourth mixing means, which are provided in order toward the first mixing means, and one fluid introduction passage between the water supply passage and the first mixing means. A first supply means for adding sodium hypochlorite in the middle of one of the fluid introduction passages between the first mixing means and the second mixing means. Raw by mixing in the first mixing means A second supply means for adding an acid for neutralizing the sterilized water, and a third supply means for communicating with the other fluid introduction passage and for adding sodium hypochlorite into the passage. A fourth supply means that communicates in the middle of the other fluid introduction passage between the third mixing means and the fourth mixing means, and that adds acid into the passage, and second The two fluid introduction passages merge at the downstream side of the mixing means and the downstream side of the fourth mixing means to form a sterilizing water supply pipe, while the two fluid introduction passages have the downstream side of the second mixing means and the first of the second mixing means. The upstream side of the three mixing means is connected via a detour switching valve .

That is, in other words, the configuration of the sterilizing water production apparatus of the present invention described above includes two fluid introduction passages, and the first mixing means sequentially in the middle of one fluid introduction passage toward the downstream side. A second mixing means and a bypass valve are provided, and the first supply means is communicated in the middle of the one fluid introduction passage on the upstream side of the first mixing means, and the first mixing means and the second mixing means The second supply means is communicated in the middle of the one fluid introduction passage between the second fluid introduction passage, the bypass water introduction valve, the third mixing means, and the second fluid introduction passage in order toward the downstream side. A fourth mixing means, communicating the third supply means in the middle of the other fluid introduction passage on the upstream side of the third mixing means, between the third mixing means and the fourth mixing means The fourth supply means is disposed in the middle of the other fluid introduction passage. And fault, in which as comprising a bypass water introducing passage communicating the other fluid introduction passage having the bypass water inlet valve and the fluid introducing passage of the one with the bypass valve.

The method and apparatus for producing sterilizing water according to the present invention are neutralized by adding sodium hypochlorite and acid to raw water to neutralize it, and hypochlorous acid is added to the neutral sterilizing water. Sodium and acid are added and mixed to produce sterilized water having a high sterilizing effect. According to the present invention, are sequentially added and mixed sodium hypochlorite and acid sterilizing water neutral by slowly reacting sodium hypochlorite with acid, it is possible to prevent occurrence of chlorine gas. In the present invention, conduit tube sequentially added Suruga sodium hypochlorite and acid, is generated from the raw water and the raw water to sodium hypochlorite and the acid that will be the addition using a plurality of mixing means By uniformly mixing with the sterilized water , the sodium hypochlorite added and the acid are prevented from reacting abruptly to suppress the generation of chlorine gas. According to the present invention, since the mixing is performed using a plurality of mixing means, a conventional mixing unit is not necessary, and in order to suppress generation of chlorine gas, a gas absorption unit is not necessary.

In the present invention, sodium hypochlorite and acid are sequentially added to raw water and mixed to neutralize to make neutral sterilizing water, and sodium hypochlorite and acid are further added to the neutral sterilizing water. Therefore, the purpose of producing sterilized water having a high sterilizing effect while suppressing generation of chlorine gas is realized. Moreover, the said objective is implement | achieved by mixing uniformly sodium hypochlorite and an acid which are sequentially added to a water conduit using the some mixing means provided in the middle of a water conduit.

The manufacturing method of the sterilizing water of this invention is demonstrated based on figures. Figure 1 is a configuration diagram of an example of the sterilizing water producing device that can achieve the manufacture of the same as sterile water and the present invention.
The water supply pipe 10 is a water supply passage for supplying neutral water such as tap water and well water as raw water. The water supply pipe 10 includes a water amount adjustment valve 12 that controls the amount of water supply, and a flow meter 14 that measures the flow rate of the raw water.
The water guide pipe 16 communicates with the water supply pipe 10 and is a fluid introduction passage for introducing raw water supplied from the water supply pipe 10 or sterilizing water generated by mixing in a mixing means described later.
A sterilizing water supply pipe 18 for supplying sterilizing water to the outside is connected to the downstream side of the introduction pipe 16. The sterilizing water supply pipe 18 includes a water distribution pipe 18a and a supply amount adjustment valve 18b. The water distribution pipe 18a communicates with the water guide pipe 16, and a flow rate adjustment valve 18b is provided at the connecting portion. By opening and closing the flow rate adjusting valve 18b, the sterilizing water guided to the sterilizing water supply pipe 18 by the water conduit 16 is supplied to a washing tub or the like (not shown). The flow rate adjusting valve 18 b is a water stop valve for introducing sterilizing water into the water distribution pipe 18.

  In the middle of the conduit 16, four mixers 20, 22, 24, and 26 are provided in order toward the downstream side. These mixers are mixing means for uniformly mixing the fluid flowing through the water conduit 16 and the additive added to the fluid. The mixers 20, 22, 24, and 26 are configured as shown in FIG. The mixer shown in FIG. 2 is installed in the pipe of the water guide pipe 16 so that the additive added to the fluid flowing in the pipe can be uniformly mixed. The form of the mixer is not limited to the mixer shown in FIG. In addition, the mixers 20, 22, 24, and 26 are formed of a material that is not corroded by the additive.

  The first mixer 20 as the first mixing means mixes sodium hypochlorite added into the pipe of the water conduit 16. In the middle of the water conduit 16 between the water supply pipe 10 and the mixer 20, the first supply means 28 communicates. The first supply means 28 includes a sodium hypochlorite storage tank 28a, an additive supply pipe 28b connecting the tank 28a and the water conduit 16, and a flow rate of sodium hypochlorite flowing through the additive supply pipe 28b. And a flow rate adjusting valve 28d provided in the middle of the additive supply pipe 28b on the upstream side of the flow meter 28c. The first supply means 28 is set to add a certain amount of sodium hypochlorite to the water conduit 16 by adjusting the flow rate adjusting valve 28d.

The second mixer 22 as the second mixing means mixes the acid added into the pipe of the water guide pipe 16. In the middle of the water conduit 16 between the first mixer 20 and the second mixer 22, the second supply means 30 communicates. The second supply means 30 includes an acid storage tank 30a, an additive supply pipe 30b that connects the tank 30a and the water conduit 16, a flow meter 30c that measures the flow rate of the acid flowing through the additive supply pipe 30b, A flow rate adjusting valve 30d provided in the middle of the additive supply pipe 30b on the upstream side of the flow meter 30c is provided. The second supply means 30 is set to supply a predetermined amount of acid that neutralizes the alkaline sterilizing water generated by the mixing of the first mixer 20 to the water conduit 16 by adjusting the flow rate adjusting valve 30d. That is, neutral sterilizing water is generated by mixing in the second mixer 22.
A flow meter 32 that measures the flow rate of the sterilizing water generated by the second mixer 22 is provided in the water conduit 16 on the downstream side of the second mixer 22.

The third mixer 24 as the third mixing means mixes sodium hypochlorite added into the pipe of the water guide pipe 16. In the middle of the water conduit 16 between the flow meter 32 and the third mixer 24, the third supply means 34 communicates. The third supply means 34 includes a sodium hypochlorite storage tank 34a, an additive supply pipe 34b connecting the tank 34a and the conduit pipe 16, and a flow rate of sodium hypochlorite flowing through the additive supply pipe 34b. A flow meter 34c to be measured and a flow rate adjusting valve 34d provided in the middle of the additive supply pipe 34b on the upstream side of the flow meter 34c are provided. The third supply means 34 is set to add a certain amount of sodium hypochlorite to the water conduit 16 by adjusting the flow rate adjusting valve 34d.
The fourth mixer 26 serving as the fourth mixing means mixes the acid added into the pipe of the water guide pipe 16. A fourth supply means 36 is provided in the middle of the water conduit 16 between the third mixer 24 and the fourth mixer 26. The fourth supply means 36 includes an acid storage tank 36a, an additive supply pipe 36b that connects the tank 36a and the water conduit 16, a flow meter 36c that measures the flow rate of the acid flowing through the additive supply pipe 36b, A flow rate adjusting valve 36d provided in the middle of the additive supply pipe 36b on the upstream side of the flow meter 36c is provided. The fourth supply means 36 is set to add a certain amount of acid to the water conduit 16 by adjusting the flow rate adjusting valve 36d.

The supply means for supplying the additive to the water conduit 16 is not limited to the above supply means. Other supply means using a control device for adjusting the supply amount of the additive or an electromagnetic pump may be used.
Moreover, it can also be set as the embodiment which provides the 1st supply means 28 and the 2nd supply means 30 reversely. Furthermore, one or more sterilizing water supply pipes for supplying sterilizing water to the outside may be provided in addition to the sterilizing water supply pipe 18. For example, when the sterilizing water supply pipe 38 is provided in the middle of the water conduit 16 between the second mixer 22 and the third mixer 24 (or the flow meter 32) in addition to the sterilizing water supply pipe 18, the water conduit 16 By providing the switching valve 38b at the communication position between the sterilizing water supply pipe 38 and switching the switching valve 38b, the sterilizing water generated by the mixing of the second mixer 22 can be supplied from the water distribution pipe 38a. That is, multipurpose cleaning and disinfection is possible with one apparatus.

  In FIG. 1, when the water amount adjustment valve 12 is opened, raw water is introduced toward the sterilizing water supply pipe 18 through the water conduit 16. Now, the 1st supply means 28 is set so that a predetermined amount of sodium hypochlorite may be supplied with respect to raw | natural water. When the sodium hypochlorite is added to the raw water, the first mixer 20 uniformly mixes sodium hypochlorite with the raw water. That is, alkaline sterilizing water is generated by mixing in the first mixer 20. Subsequently, a specific amount of acid that neutralizes the alkaline sterilizing water from the second supply means 30 is added to the alkaline sterilizing water generated by the first mixer 20. The added acid is uniformly mixed with the alkaline sterilizing water by the second mixer 22. By mixing in the second mixer 22, neutral (pH 7) sterilized water is generated, and in the neutral sterilized water, approximately 80% of free effective chlorine becomes hypochlorous acid. Moreover, since it became neutral in the said neutral sterilizing water, sodium hypochlorite and an acid do not exist. In the mixing in the second mixer 22, the pH varies from alkaline to neutral and is not accompanied by a rapid variation in pH leading to acidity, thereby suppressing generation of chlorine gas.

Further, sodium hypochlorite supplied from the third supply means 34 is added to the neutral sterilized water generated by the mixing in the second mixer 22. The added sodium hypochlorite is uniformly mixed by the third mixer 24. By mixing in the third mixer 24, alkaline sterilized water having a higher free effective chlorine concentration and containing more hypochlorite ions than sterilized water generated by mixing in the second mixer 22 is generated. Further, in the mixing of the third mixer 24, since neutral sterilizing water without acid and sodium hypochlorite are mixed, the reaction between sodium hypochlorite and acid does not occur, and chlorine gas Occurrence is suppressed.
Further, alkaline sterilizing water containing a large amount of hypochlorite ions generated by mixing in the third mixer 24 and having a high free effective chlorine concentration is supplied from the fourth supply means 36 to pH 7 (neutral) sterilizing water. A specific amount of acid is added to produce When the added acid is mixed in the fourth mixer 26, about 80% of free effective chlorine in the sterilizing water generated by the mixing becomes sterilizing water for hypochlorous acid. This sterilized water has a high free effective chlorine concentration and contains a large amount of hypochlorous acid as compared with neutral sterilized water produced by mixing in the second mixer 22. Mixing of the fourth mixer 26 generates alkaline sterilized water generated by the mixing of the third mixer 24 into neutral sterilized water, and is accompanied by a rapid change from alkaline to acidic. Therefore, generation of chlorine gas can be suppressed.

Next, in FIG. 1, an example of a case where sodium hypochlorite storage tank 34a and an acid storage tank. In this example, the acid supplied from the third supply means 34 is added to the neutral sterilized water generated by the mixing in the second mixer 22. The added acid is uniformly mixed by the third mixer 24. By mixing in the third mixer 24, acidic sterilizing water containing more hypochlorous acid than sterilizing water generated by mixing in the second mixer 22 is generated. Further, in the mixing in the third mixer 24, since neutral sterilized water in which sodium hypochlorite does not exist and the acid are mixed, the reaction between the sodium hypochlorite and the acid does not occur, and the chlorine gas Occurrence is suppressed. However, in this case, in order to avoid a sudden change in pH value, the supply of acid from the third supply means 34 is adjusted so that acidic sterilizing water having a pH of around 6 is generated by mixing in the third mixer 24. It is desirable to do.
In addition, a specific amount of acid for generating acidic sterilizing water having a pH of 4 to 5 is added from the fourth supply means 36 to the acidic sterilizing water generated by the mixing in the third mixer 24. When this added acid is mixed in the fourth mixer 26, 100% of free available chlorine becomes sterilized water which is hypochlorous acid. The mixing of the fourth mixer 26 generates acidic sterilized water produced by the mixing of the third mixer 24 into sterilized water having a lower pH value, and is accompanied by a rapid change from alkaline to acidic. Since it is not a thing, generation | occurrence | production of chlorine gas is suppressed.
The specific amount of acid added from the fourth supply means 36 is desirably a quantity to generate acidic sterilizing water having a pH value of around 4 to 5. This is because if sterilized water having a pH lower than 4 is generated, sterilized water of strong acid water is generated, and chlorine gas may be generated, which is extremely dangerous for the human body.
Further, sterilized water having a pH of 4 to 5 may be produced using the third supply means 34 and the third mixer 24. From the viewpoint of preventing the generation of chlorine gas, the third supply means 36 and the fourth mixer are used. It is desirable to use No. 26 in combination, and add and mix the acid separately.

Sterilized water was manufactured using the apparatus of FIG. Further, the produced sterilized water is distributed from the sterilized water supply means 38 and the sterilized water supply means 18, and the pH value, the effective chlorine concentration, and the chlorine gas concentration of the distributed sterilized water are respectively measured by a pH meter and an effective chlorine concentration measuring device. Measured using a gas detector tube. In this embodiment, a predetermined amount of tap water is supplied from the water supply pipe 10, and predetermined amounts of hypochlorous acid and hydrochloric acid are added to the tap water from the first supply means 28 and the second supply means 30, respectively. The first mixer 20 and the second mixer 22 were mixed so that sterilized water having a pH of 7 and an effective chlorine concentration of 200 ppm was generated. The chlorine gas concentration of the sterilized water distributed from the sterilized water supply means 38 was 0.2 ppm.
(1) Example you produce effective chlorine concentration high sterilizing water <br/> above pH 7, the sterilizing water of the effective chlorine concentration 200 ppm, hypochlorous acid from the third supply means 34 is added from the first supply means 28 The same amount of sodium hypochlorite as sodium was added, and the same amount of hydrochloric acid as that added from the fourth supply means 36 to the second supply means 30 was added. The sterilized water distributed from the sterilized water supply means 18 was sterilized water having a pH of 7 and an effective chlorine concentration of 400 ppm, and the chlorine gas concentration was 0.2 ppm. There was no change in the chlorine gas concentration, and no new chlorine gas was generated due to the addition and mixing of the sodium hypochlorite and the acid.
Further, as a comparative example above clean, the third supply means 34 without using the fourth supply means 36, respectively increasing amounts of sodium and hydrochloric hypochlorite from the first supply means 28 the second supply means 30. And added to produce sterilized water having a pH of 7 and an effective chlorine concentration of 330 ppm. The chlorine gas concentration of the sterilized water distributed from the sterilized water supply means 38 was 0.6 ppm.
(2) Example <br/> above pH7 you produce (low pH) sterile water acidic, the sterilizing water of the effective chlorine concentration 200 ppm, each addition of hydrochloric acid and a third supply means 34 fourth supply means 36. Then, sterilized water having a pH of 5 was generated by mixing the third mixer 24 and the fourth mixer 26. At this time, the sterilized water distributed from the sterilized water supply pipe 18 was sterilized water having a pH of 5 and an effective chlorine concentration of 200 ppm, and the chlorine gas concentration was 0.5 ppm.
Further, as a comparative example of the above embodiment, the third supply means 34 and the fourth supply means 36 are not used, but hydrochloric acid is added and mixed only from the second supply means 30 to obtain sterilized water having a pH of 5 and an effective chlorine concentration of 200 ppm. Was generated. The chlorine gas concentration of the sterilized water distributed from the sterilized water supply means 38 was 0.7 ppm to 1.0 ppm.
As described above, according to the method for producing sterilizing water using the apparatus of FIG. 1, the chlorine gas concentration is lower than that of the above comparative example, and the generation of chlorine gas due to the addition and mixing of sodium hypochlorite and acid is suppressed. I was able to.
In addition, although the allowable concentration of chlorine gas for occupational health is 1 ppm, the chlorine gas concentration of the sterilized water produced by the present invention is compatible with the allowable concentration.

As is clear from the above example, by adding and mixing the following sodium chlorite and an acid to produce sterilizing water neutral, admixing sodium hypochlorite and acid sterilizing water of neutral It makes it possible as sodium hypochlorite and acid in the addition does not react to suppress the generation of chlorine gas to produce a high sterilization effect sterilizing water. In addition, the added sodium hypochlorite and acid are sufficiently mixed and diluted with raw water using a plurality of mixers, so there is a possibility that sodium hypochlorite and acid with high concentration may react. In addition, since there is no rapid change in pH value from alkaline to acidic, generation of chlorine gas can be suppressed.

Therefore, in the present invention, FIG. 3 shows an example of an embodiment of the manufacturing apparatus of the present invention configured by applying the apparatus of FIG. 3, the constituent members having the same reference numerals as those in FIG. 1 have the same members and the same application functions as the constituent members in FIG.
The apparatus of FIG. 3 has two water conduits 16a and 16b as fluid introduction passages. The conduit pipes 16a and 16b are respectively in a state where raw water is supplied from the water supply pipe 10, and the same amount of raw water as the conduit pipe 16 of FIG. 1 is introduced.
In the middle of the water conduit 16a, a water amount adjusting valve 40, a flow meter 14, a first mixer 20, a second mixer 22, and a bypass valve 42 (switching valve) are provided in this order toward the downstream side. The first supply means 28 is connected in the middle of the water conduit 16 a between the flow meter 14 and the first mixer 20, and the middle of the water conduit 16 a between the first mixer 20 and the second mixer 22. The 2nd supply means 30 is connected to. Accordingly, neutral sterilizing water is generated on the water conduit 16a side of the present apparatus.
On the other hand, a bypass water introduction valve 44 (switching valve), a flow meter 32, a third mixer 24, a fourth mixer 26, and a supply amount adjusting valve 18a are provided in this order in the middle of the water conduit 16b. It has been. Further, the third supply means 34 is connected in the middle of the water conduit 16 b between the flow meter 32 and the third mixer 24, and the middle of the water conduit 16 b between the third mixer 24 and the fourth mixer 26. The 4th supply means 36 is connected to.

  Furthermore, when the conduit 16a is closed by the bypass valve 42 and the conduit 16b is closed by the bypass water introduction valve 44, the conduit 16a having the bypass valve 42 and the conduit 16b having the bypass water introduction valve 44 are provided. Is in a state of communication through a bypass water conduit 46 as a bypass water introduction passage. That is, by closing the bypass valve 42 and the bypass water introduction valve 44, the neutral sterilized water generated on the side of the conduit pipe 16 a is downstream of the bypass water introduction valve 44 via the bypass conduit pipe 46. This is introduced into the water conduit 16b.

In the apparatus of the present invention , sodium hypochlorite or an acid is added from the third supply means 34, and the water guide pipe 16a provided with the bypass valve 42 and the water guide pipe 16b provided with the bypass water introduction valve 44 are closed. Neutral sterilized water generated on the water pipe 16a side is generated on the water conduit 16b side into sterilized water having a high free effective chlorine concentration or acidic sterilized water, and sterilized from the sterilized water supply pipe 18 as in FIG. Highly effective sterilizing water can be distributed.
Further, when sodium hypochlorite is added from the third supply means 34 and a specific amount of acid neutralizing the sodium hypochlorite added from the fourth supply means 36 is added, a bypass valve 42 is provided. By opening the water conduit 16a and the water conduit 16b including the bypass water introduction valve 44, the neutral sterilizing water generated on the water conduit 16a side and the water conduit 16a side is brought together from the sterilizing water supply tube 18. Can distribute water.
As described above, according to the apparatus of the present invention , various types of sterilizing water having different sterilizing effects can be provided, and multipurpose cleaning and disinfection are possible.

It is a configuration diagram of an example of a manufacturing to order the device disinfecting water. It is a figure which shows a mixing means. Is a diagram illustrating an example of the implementation form of the present onset AkiraSo location of applying the apparatus of FIG. 1.

10
Water supply pipe 16
Water conduit 18
Sterilization water supply pipe 20
First mixer 22
Second mixer 24
Third mixer 26
Fourth mixer 28
First supply means 30
Second supply means 34
Third supply means 36
Fourth supply means 38
Sterilization water supply pipe 42
Bypass valve 44
Bypass water introduction valve 46
Detour water introduction pipe

Claims (1)

A water supply passage for supplying raw water, two fluid introduction passages for introducing raw water supplied by the water supply passage, a sterilization water supply passage for supplying sterilization water flowing through each fluid introduction passage to the outside, and the one fluid introduction passage The first mixing means and the second mixing means that are sequentially provided toward the downstream side in the middle of the second, and the third mixing means and the fourth mixing means that are sequentially provided toward the downstream side in the middle of the other fluid introduction passage and mixing means, a first supply means for adding the one of the fluids introduced halfway into been made to contact sodium hypochlorite in the path of the passage between the supply passage and the first mixing means, This is communicated in the middle of one fluid introduction passage between the first mixing means and the second mixing means, and neutralizes the sterilized water generated by the mixing of the first mixing means in the passage. a second supply means for adding that acid, A third supply means serial be one contact in the middle of the other fluid inlet passage for added pressure to the sodium hypochlorite in the passage, the other between the third mixing means and the fourth mixing means of it is one contact in the middle of the fluid inlet passage possess a fourth supply means for adding an acid to the said passage, and said downstream side of the downstream side and the fourth mixing means of the second mixing means 2 The two fluid introduction passages merge to form a sterilizing water supply pipe, and the two fluid introduction passages communicate with the downstream side of the second mixing means and the upstream side of the third mixing means via a bypass switching valve. bacteriostatic water production apparatus killing you, characterized in that the.

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