JPH0427493A - Cleaning and sterilizing device for water and method for utilizing cleaned and sterilized water - Google Patents

Abstract

PURPOSE:To allow the rapid cleaning and sterilizing treatment of polluted water and the miniaturization of the above device by feeding ozone-contg. air into a bubble generator and subjecting water to be treated to the combined effect of UV rays and ozone-contg. bubbles in an aeration tank. CONSTITUTION:A UV lamp 40 of an ultraviolet irradiation device 32 disposed in the aeration tank B is lighted and a UV lamp 52 of an ozone generator C is lighted. An air feed pump AP is simultaneously driven to feed the air into an outside cylinder 50 of the ozone generator C. The air subjected to the irradiation with the UV rays of about 185nm from the UV lamp 52 in the ozone generator C is partly ozonized is branched. This air is sent through pipings L1 to L5 disposed in the aeration tank B to a bubble generator 34 provided near the bottom of the aeration tank B and is released as the ozone-contg. bubbles into the water to be treated in the aeration tank B. Consequently, the fresh water and sea water which are the water to be treated receives the ozone-contg. bubbles and the irradiation with the UV rays of the extremely high sterilizing power in the aeration tank B and is thereby compositely treated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a water purification sterilization device and a method for utilizing purified water.
In particular, we purify and sterilize freshwater and seawater so that they can be used as food processing water, fish tank water, etc., and we also treat wastewater after such use to make it pollution-free and release it. The present invention relates to a water purification and sterilization device that enables water purification and sterilization, and a method for maintaining the freshness of processed products by using the thus treated purified and sterilized water in food processing, particularly in the primary processing of seafood.

(Prior art and its problems) When purifying and sterilizing water, the "water" to be purified includes freshwater such as well water, spring water, river water, lake water, etc., and seawater.

As methods for purifying and sterilizing freshwater and seawater, there are chlorination methods, which are used for urban water supplies, to treat freshwater on a large scale, as well as aeration methods and treatment methods that use microorganisms. For small-scale treatment, there is a filtration method that also uses microorganisms in some cases. On the other hand, when seawater is to be treated and used for processing seafood, filtration methods using reverse permeation membranes or microporous materials are generally used, and in some cases, microbial membrane methods are also used. ing.

Except for the treatment of freshwater and seawater, especially when freshwater is treated to purify and sterilize it to the extent that it can be used as drinking water - purification and sterilization of seawater is more difficult than freshwater for boat fishing. .

The present invention can also be applied to the treatment of fresh water, but it can also be used to purify and sterilize seawater and use it as processed water for fish and shellfish or water for fish and shellfish tanks, and to treat wastewater that has been used in this way so that it can be returned to the sea. The main focus is on making it possible to discharge water into the water, and therefore, the description in this specification will be made in connection with this.

Currently, seawater pumped into tanks near fishing ports is used as treated water for primary processing of seafood, such as when opening and processing horse mackerel. It is customary to use it after passing it through a filter (using a filter medium). However, in the former case, due to ocean pollution, it is necessary to find a water sampling site offshore, which increases the cost of transporting water for sampling, and the shelf life of processed products decreases significantly in summer. There is a problem in doing so. On the other hand, even when using the latter type of filter, the filter medium must be replaced frequently due to ocean pollution, which causes the filter to become clogged, which not only increases costs but also makes maintenance troublesome. Similarly, there is a problem in that the shelf life of processed products is significantly reduced. In addition, the actual situation is that the wastewater used for the above processing is simply filtered using netting material to separate coarse substances, and then disposed of in the sewer system, and as a result, is discharged into the sea. This causes the seawater to become nutrient-poor and contributes to marine pollution.

Note that water purification and sterilization involves the removal or sterilization of living bacteria, the removal of ammonia and nitrous acid, deodorization and decolorization, decomposition and removal of night-time waste, etc., but conventional technology equipment that mainly uses filtration In this case, when the amount of processing increases, not only does the equipment become significantly larger, but also the basic purpose of the present invention is to
In particular, seawater collected near the coast and in some cases contaminated with bacteria, etc. is purified and sterilized and used as water for processing seafood and fish cultivation, and wastewater after use is treated to prevent marine pollution. The purpose of the present invention is to provide a water purification and sterilization device that provides impermanent water quality.

A secondary but important object of the present invention is to provide a water purification and sterilization system that is compact, high throughput, and easy to maintain.

In addition, seafood processing companies located near fishing ports, such as those that produce open-dried fish products, are exposed to so-called "neto" fish in the summer.
The reality is that we are suffering from this problem every year due to the fact that it becomes more likely to occur and the shelf life of the product is extremely reduced.We believe that this is mainly due to the quality of the processed water.
The present inventor attempted the primary processing of seafood using water treated with the purification sterilization device of the present invention, and when comparing it with seafood processed conventionally using seawater or well water, It has been found that storage stability is significantly improved. Therefore, one of the other and important objects of the present invention is to provide a method for maintaining the freshness of seafood by processing it using purified sterilized water treated by the purifying and sterilizing apparatus according to the present invention. It is in.

(Means and effects for solving the problem and achieving the object) The present inventor has conventionally discovered a fish culture tank and the water quality in the tank.
In particular, I am engaged in research and development on maintaining and improving water quality in seawater, and am convinced that ultraviolet irradiation is effective in maintaining water quality in this type of aquarium, so I installed an ultraviolet lamp in the aquarium. When installed, air is sent near the bottom to form bubbles, and the ultraviolet rays irradiated into the water from the ultraviolet lamp sterilize bacteria, kill algae spores, etc., and ozone the air inside the bubbles. has already proposed a water purification device for a fish tank that utilizes this ozone to further sterilize and increase the dissolved oxygen concentration (Japanese Utility Model Publication No. 11T2-178888).

As mentioned above, the device disclosed in Japanese Utility Model Publication No. 82-1788Ei8 was developed for use in fish tank tanks, and has been well received. The so-called "seawater" that has become extremely contaminated due to the large-scale processing of seawater such as
Because it takes time to treat wastewater and purify it to the point where it can be discharged, it is insufficient in terms of capacity.

Therefore, the device of the present invention was developed after further study, and the water purification and sterilization device of the present invention includes a storage tank into which the water to be treated is introduced, an aeration tank, and the above storage tank and aeration tank. It is equipped with connecting piping, a pump that sends the water to be treated from the storage tank to the aeration tank via the piping, and an ozone generator, and the aeration tank is equipped with an ultraviolet irradiation device and a bubble generator. Ozone-containing air from the ozone generator is supplied to the bubble generator, and the water to be treated that circulates between the storage tank and the aeration tank is exposed to ultraviolet light and ultraviolet light in the aeration tank. The basic feature is that the seawater is subjected to a complex action by ozone-containing bubbles.However, if the wastewater after use is to be treated and discharged, the above equipment configuration is sufficient; When the water is used as water for the primary processing of fish and shellfish, it is preferable to further improve the water quality by removing any suspended solids, etc., because the object to be treated is food. For this purpose, a post-treatment tank can be installed, and according to the present invention, the post-treatment tank comprises a filtration chamber and a water storage chamber, and the filtration chamber is connected to at least one of the storage tank and the aeration tank by piping. The water storage chamber is provided with a primary storage section for incoming water and a calfram material filling section from the lower stage to the upper stage, and the water storage chamber is equipped with an overflow mechanism.

In the water purification sterilization device according to the present invention, the ultraviolet irradiation device placed in the aeration tank has an outer cylinder whose upper and lower ends are open, an opening on the upper side, and which is placed upright in the aeration tank. The inner cylinder is placed inside the outer cylinder and has an open top end and a closed end, and is made of an ultraviolet-transparent material.The inside is liquid-tight and is attached to the outer cylinder. It is preferable that the light emitting device is composed of an inner cylinder having a diameter of 254 nm, and an ultraviolet lamp disposed within the inner cylinder and emitting ultraviolet light mainly having a wavelength of 254 nm. In this case,
Quartz, which has a UV transmittance of 95% or more, is preferred as the UV-transparent material for the inner tube, but since quartz tubes are expensive, UV-transparent glass such as hard glass (borosilicate glass), ozone-free quartz, and soft It can also be replaced with glass (barium crown glass) or the like. On the other hand, an ultraviolet lamp that irradiates ultraviolet rays with a wavelength of 254 nm as a main component was selected because among the radiation emitted by a low-pressure mercury lamp, the wavelength of 253.7 am is called the resonance line, and it has the strongest sterilizing power. It is from. In addition, a plurality of inner cylinders each containing an ultraviolet lamp are installed inside the outer cylinder, and at least one of these ultraviolet lamps is a lamp that emits ozone rays with a wavelength of 185 cm, and the others are lamps that emit ozone radiation with a wavelength of 185 cm. 254II11
It can also be a lamp that emits the germicidal resonance rays of 1. In this case, it is important that the material of the inner cylinder housing the ultraviolet lamp for ozone beam irradiation be transparent quartz.

In the water purification sterilization device according to the present invention, the ozone generator includes an outer cylinder provided with an air introduction hole and an ozone-containing air exhaust hole, and an ultraviolet ray that is arranged and fixed in the outer cylinder and irradiates ultraviolet rays with a wavelength of 185 nm. It consists of a lamp. In this case, examples of the ozone-resistant material constituting the outer cylinder include vinyl chloride and stainless steel, but vinyl chloride is preferable in consideration of formability and manufacturing cost, and the ultraviolet lamp is made of quartz. It can also be housed within a manufactured inner cylinder.

In the water purification sterilization apparatus according to the present invention, the calcium material filling section in the post-treatment tank is formed of a shell layer, and the shell layer is composed of a coarsely crushed coral shell layer from the lower layer to the upper layer, which is the direction in which the incoming water passes. , a shell layer selected from oyster and scallop shells and coarsely crushed, and a coral sand layer. This is because passing through the shell layer configured as described above not only completely removes any suspended solids that may exist, but also dissolves calcium and reduces the raw water's pl (from about 7.7 pH of (seawater)
The hardness of the raw water increases to about 11.0, and the hardness of the raw water with a hardness of 70 increases to about 75. This is because when used for processing and then made into a raw-dried product using a conventional method, it is thought to help suppress oxidation and the generation and suppression of spoilage bacteria, thereby maintaining the freshness of the product.

The capacity of the water purification sterilization device according to the present invention depends on the capacity of the ultraviolet irradiation device and the ozone generator, as well as the overall scale of the device. The capacity is 150 liters, and there are four inner cylinders placed in the aeration tank, each of which is equipped with an ultraviolet lamp (made of quartz, 25 x 500 II) that irradiates ultraviolet light of approximately 254n++
1 m, 15 W), and the ozone generator is the same as above, except that it contains two ultraviolet lamps that emit ultraviolet light of about 185 nm, and the internal volume of the ozone generator is 8 liters. Air is pumped in at a rate of 65 liters per minute to prepare air containing ozone of 0.06-0.1 ppn+, and this is sent to the aeration tank through five branch pipes, resulting in an ozone concentration of approximately 0.04-0.1 ppn+. Hppm, this ozone-containing air is released as fine bubbles through an aeration pipe, and the seawater to be treated is circulated at a rate of 120 liters per minute through the above-mentioned storage tank and aeration tank, then purification and sterilization can be achieved. The process is completed in about 60 minutes. Next, the water treated as described above is sent to a post-treatment tank and subjected to filtration treatment to obtain the desired purified and sterilized water. When this purified sterilized water was collected and visually observed, no impurities were found, and it was odorless and had a sparkling color.

(Examples, etc.) Next, the present invention will be described in more detail with reference to Examples with reference to the drawings, and the effects of the apparatus of the present invention will be illustrated by test examples.

FIG. 1 shows an outline of a water purification and sterilization apparatus IO according to the present invention. In this purification sterilization equipment lO, A is a storage tank for supplying water to be treated, B is an aeration tank that constitutes the main part, C is an ozone generator, and D is water after being treated in the aeration tank B. This is a post-treatment tank for further processing. This drawing is not drawn to reflect various dimensional relationships,
In fact, the storage tank A used in the experiment of this example had an effective internal capacity of 1.5 tons, and the aeration tank B had an internal capacity of 1501 tons.
It was set to J-Tuttle. Note that the post-treatment tank C can have any capacity.

The above storage tank A includes a water supply on-off valve 12, a drainage on-off valve 14,
It is equipped with a float switch 16 and a control device 18 that automatically controls these.

The above aeration tank B is made of an ozone-resistant jacket 30 made of vinyl chloride, for example, and has an ultraviolet irradiation device 32 placed upright in the center, and a bubble generator 34 at the bottom. ing. The above-mentioned ultraviolet irradiation device has an outer cylinder 3B with open upper and lower ends and an opening on the upper side surface, and is arranged inside this outer cylinder 3B.The upper end is open and the other end is closed. The inner tube 38 is made of a good material and is attached to the outer tube 38 in a liquid-tight manner, and an ultraviolet lamp 40 is disposed inside the inner tube 38.

In the illustrated embodiment, the outer sleeve 36 is made of an ozone-resistant material, such as vinyl chloride, and has four inner sleeves 38 disposed within the outer sleeve 36 . Each of these inner cylinders 38 accommodates one ultraviolet lamp 4o, as described above.

This ultraviolet lamp 40 is connected to the earth leakage breaker LB from the power supply PS.
1. Chalk box (ballast) A low-pressure mercury lamp that is lit by electricity sent through the CB, and basically uses a wavelength of 253.7 nm, which is called the resonance line or germicidal line.
One or two of these can also generate ultraviolet rays with a wavelength of 185 nm, so-called "ozone rays." Incidentally, the inner Fir 3 houses the ultraviolet lamp 40 that generates the resonance line.
There is no problem with the material 8 as long as it has a high transmittance, and examples include quartz, general ultraviolet-transmitting glass, hard glass (borosilicate glass), ozone-free quartz, soft glass (barium crown glass), etc. In the case where an ultraviolet lamp for generating ozone rays is housed, it is important that w38 be made of quartz.

The inner cylinder 38 in the illustrated embodiment has an outer diameter of 32n1
11. Thickness 1.5III+1 Inner diameter 29111L
Length B [10 mm, ultraviolet lamp 40
has an outer diameter of 2511 mm, a length of 500 mm, and an output of 15 W.

The ozone generator C described above includes an outer cylinder 50 made of an ozone-resistant material and equipped with an air introduction hole and an ozone-containing air exhaust hole;
It is comprised of an ultraviolet lamp 52 that is fixedly placed inside the outer cylinder and irradiates ultraviolet rays (ozone rays) with a wavelength of about 185 nm. The material constituting the outer cylinder 5o only needs to have ozone resistance as described above, and can be made of stainless steel, etc., but from the viewpoint of cost, it is made of vinyl chloride, and it is easy to maintain and replace the ultraviolet lamp 52. From this point of view, it is preferable to have a divided structure. In the illustrated embodiment, the ultraviolet lamp 52 is installed bare, but outside f! Taking into consideration the attachment to the J50, the ultraviolet irradiation device 32 may be housed in an inner cylinder (not shown) in the same manner as in the ultraviolet irradiation device 32 described above. Of course, in this case it is important that the inner cylinder be made of quartz. Air is sent into the outer cylinder 50 of the ozone generator C described above via an air pump AP connected to a power source PS. This air pump A
P it AC100V, power consumption 200 W/hour, air flow rate 130 liters per minute, air flow pressure 0.5 kgf/a
It has a capacity of 1.5 m", but is operated at a low pressure of 65 liters per minute and a pressure of 0.3 kgf/cm2.The concentration of the ozone-containing air prepared by this ozone generator C is measured by ozone concentration The ozone concentration is adjusted to a predetermined level (0, 0G -0,
1 ppm) and then sent to the bubble generator 34 disposed in the aeration tank B described above and released into the treated water in the aeration tank B as ozone-containing fine bubbles.

In the aeration tank B, the bubble generator 34 is configured as a plurality of aeration nozzles, one of which is arranged near the inner bottom of the outer cylinder 3B, and the others are located outside! It is located outside of 3B. The ozone-containing bubbles released into the water to be treated from these aeration nozzles cause an upward flow in the water to be treated in the aeration tank B. In the aeration tank B, the water to be treated is purified by the combined action of ozone and bactericidal ultraviolet light, mainly at a wavelength of 254nIll, from the ultraviolet lamp 40 inside the outer cylinder 36, and exclusively by ozone and the outside of the outer cylinder 36. However, in order to improve treatment efficiency, it is necessary to increase the contact rate between the water to be treated and ozone per unit time and to increase the amount of ultraviolet rays that the water to be treated receives. is important. In order to bring about such an effect, it is possible to circulate the water to be treated in the aeration tank B, and the above-mentioned upward flow of the water to be treated due to ozone-containing bubbles is used as a means for bringing about this water circulation. That is, the inside of the outer cylinder 3B and the upper discharge port 3 (12) are connected, a part of the water to be treated in the outer cylinder 36 is once led to the outside of the aeration paddle B, and then the water is returned to the aeration tank near the bottom of the aeration tank B. In this case, if the flanged sleeve 38 is arranged concentrically with respect to the outer cylinder 3B, the flange portion 382 of the sleeve acts as a kind of baffle plate, and therefore This is advantageous because the contact rate between the rising ozone-containing bubbles and the recycled water to be treated is improved.

Regarding the water circulation of the water to be treated in the aeration tank B when the above-mentioned flanged sleeve 3B is arranged, the water to be treated passes between the sleeve 38 and the outer FJ 3B and descends. , enters the inside of the outer cylinder 36 near the bottom, and the outer cylinder 3
The ozone-containing bubbles rising inside the aeration tank B rise inside the outer cylinder 36 due to the lift-up action, and a part of this upward flow is branched as described above and is once led to the outside of the aeration tank B via the upper discharge port 302. Then, it flows into the aeration tank B again from near the bottom, rises in the aeration tank B due to the lifting action of the ozone-containing bubbles, and then returns to the mantle 38 and the outer II 3B.
The upper discharge port 3
The water to be treated that has risen inside the outer cylinder 36 without being branched toward 02 flows through the opening 382.3 provided in the upper side of the outer cylinder 36.
[It flows out through i4, and then passes again between the cannula 38 and the outer cylinder 36 and descends.

Note that the post-treatment tank includes a filtration chamber 60 and a water storage chamber 70. The filtration processing chamber 60 is connected by piping to at least one of the storage tank A and the aeration tank B described above, and the purified sterilized water is circulated through the storage tank A and the aeration tank B, and is sufficiently treated in the aeration tank B. The primary storage section 62 of the incoming water is formed from the lower stage to the upper stage.
and a calcium material filling section B4. In the illustrated embodiment, the calcium material-filled section 64 is composed of three shell layers, from the lower layer to the upper layer, which is the direction of passage of the incoming water, including the crushed fural shell layer (for children). The coral sand layer 64B consists of a layer 644 (about half the size of the above-mentioned crushed coral shell), and a coral sand layer 64B. There is. The calcium content of each of the above calcium materials (seashells) is approximately 35.8 to 53.1B in terms of calcium carbonate, and as shown in the figure, each calcium material is approximately It is convenient to keep 5 to 10 kg of each bag separately for replacement. A synthetic resin or non-corrosive metal lattice member 66 is disposed to support the shell layer made of the calcium material, and a fibrous material is provided between the lattice member 66 and the shell layer. A filter B8 is provided, so that even if there are suspended solids in the incoming water, they will be captured by the above-mentioned fibrous filter 68 and thus transferred to the shell layer and thus to the water tank 70. It is designed not to migrate. Incidentally, the floating matter captured by the fibrous filter 68 falls during backwashing of the filtration processing chamber 60, and is removed to the outside of the thread by opening the backwashing drain valve provided at the bottom of the primary reservoir section 62 of the incoming water. Ru. An overflow mechanism 702 is provided in the water storage chamber 70, and when the on-off valve 72 is opened, the purified sterilized water stored in the water storage chamber is sent out of the system through the overflow mechanism 702 and processed. Used as treated water, etc.

Next, the operation mode of the water purification and sterilization apparatus according to the present invention having the above-mentioned configuration will be specifically described. However, the various dimensions, the number and dimensions of the ultraviolet lamps (low-pressure mercury lamps) used to generate the germicidal resonance rays and ozone rays, which are ultraviolet rays, are the same as those already mentioned, so we will omit the explanation of the overlapping parts. .

First, seawater collected by separating coarse suspended solids through a simple filter is introduced into the storage tank A by opening the water supply on-off valve 12. When the water level in the storage tank A reaches a certain level, a signal is sent from the float switch 16 to the control device 18 to close the water supply on-off valve 12.

Then, the pump P-1 is driven, and the water to be treated in the storage tank A is sent to the aeration tank B. In this case, since the water level in the storage tank A decreases, the water supply on-off valve 12 is opened again, and the water to be treated is replenished. Water is supplied to aeration tank B (by opening valve V-1 (valve V-2 is opened when the aeration tank is completely drained when cleaning). Due to the inflow of water to be treated When the water level in the aeration tank B gradually rises and reaches the position of the upper discharge port 302, the valve V-3 is opened and the pump P-2 is operated, and the water to be treated in the aeration tank B is returned to the storage tank A. At this point, the water level in storage tank A and aeration tank B becomes constant, and the water to be treated is circulated. (Like valve V-2, valve V-4 is This valve is either closed and opened to the aeration tank B, or opened and used for water circulation of the water to be treated in the aeration tank B).

With the above operations, the water to be treated is ready to be purified and sterilized. Therefore, the ultraviolet lamp 40 in the ultraviolet irradiation device 32 disposed in the aeration tank B is turned on, the ultraviolet lamp 52 in the ozone generator C is turned on, and the air supply pump AP is driven to supply air to the ozone generator C. It is sent into the outer cylinder 50. In this case, the ultraviolet lamp 40 in the ultraviolet irradiation device 32 disposed in the aeration tank B emits a wavelength of 254 nm to the water to be treated that is moving inside the aeration tank.
(Preferably wavelength 2, which is a resonance line with extremely high bactericidal properties)
53.7nm) to destroy living bacteria such as E. coli and algae spores existing in the water to be treated. On the other hand, in the ozone generator C, the wavelength 185 from the ultraviolet lamp 52 is
The air that has been irradiated with nanometer ultraviolet rays is partially ozonized and branched off into pipes (L+, L+,
La, L3, La, La) is sent to the bubble generator 34 provided near the bottom of the aeration tank B,
It is released as ozone-containing bubbles to the water to be treated in the aeration tank B.
04-0. The ozone concentration should be set to 08 ppm, and if the ozone concentration is set in this way, the ozone concentration ultimately released into the surrounding environment after the water to be treated is purified and sterilized will be 0 and 02 ppm or less. This is because, although it has bactericidal and refreshing properties, if released in higher concentrations, its oxidizing power may be harmful to human health.) Incidentally, among the piping for guiding ozone-containing air, the free end of the pipe 3 is arranged inside the outside W36 of the ultraviolet irradiation device 32, and the other pipes are arranged outside the outer cylinder 36. Incidentally, the aeration nozzle part of the bubble generator 34 is naturally made of an ozone-resistant material such as sintered glass or ceramics, and the ozone-containing air is produced as fine bubbles of about 0.1 to 0.8 mm. is released into the water being treated.

The effects brought about by the purification and sterilization apparatus according to the present invention include the combined effect of the bactericidal ultraviolet rays with a wavelength of 254 nm irradiated from the ultraviolet lamp 40 placed in the aeration tank B and ozone-containing bubbles on the water to be treated. extremely important,
Therefore, a description will be given in this regard with reference to FIG.

FIG. 2 shows how the ozone-containing bubbles OB discharged into the water to be treated from the aeration nozzle of the bubble generator 34 and the ultraviolet rays UV irradiated from the ultraviolet lamp 40 have an effect on the water to be treated. It is depicted in an exaggerated manner.

Due to its nature, the ozone (03) in the bubbles decomposes to produce oxygen molecules (02) and nascent oxygen (0), and the former dissolves into the water to be treated to increase the oxygen concentration. The latter exhibits a strong oxidizing power about seven times that of chlorine, destroys cell membranes of bacterial cells that may be present in the water to be treated, and also decomposes organic substances, ammonia, nitrous acid, etc. In this case, the bubbles OB rise while constantly changing their shape dynamically, and according to the device of the present invention, apart from such ozone-containing bubbles OB, the bubbles OB rise from the ultraviolet lamp 40 housed in the inner cylinder 38. UV rays with a wavelength of 254 nm have a strong bactericidal effect
V is irradiated into the water to be treated. The irradiated ultraviolet ray U
In some cases, V exerts its sterilizing power on existing bacterial cells and destroys cell membranes, and also collides with the ozone-containing bubbles OB, which is rising while changing its shape, and is reflected, or enters and causes complex damage. This not only promotes the release and decomposition of ozone from the bubbles, but also extends the total reach of the irradiated ultraviolet rays, that is, improves the utilization rate.

The rising ozone-containing bubbles mentioned above are, of course,
It has the effect of lifting up and aggregating the floating suspended substances present in the water to be treated, and therefore, when the purification sterilization apparatus 10 according to the present invention is operated for a while, the upper space in the aeration tank B will contain the above-mentioned substances. The filth generated from the treatment is foamy, so-called
It begins to accumulate as "scum", and then this pollution foam WB
is discharged to the outside through a guide pipe 302 disposed at the upper part of the aeration tank B through its downward branch port 302A. This excreted waste has a light brown to brown color, and if left for several hours, it will change color to blackish brown or black and solidify.When analyzed, the presence of nitrates was confirmed, but it was contaminated with E. coli and other bacteria. Its existence was not recognized. In addition, the above guide tube 302
Excess ozone-containing air is released into the atmosphere from the upward branch port 302b, but the ozone concentration is 0. O2
Even if it is below ppm and useful for disinfecting the surrounding environment, there is no risk of harm to human health.

In addition, in the case of treated water with a high degree of contamination, for example, a BOD of several thousand, the amount of scum described above is large and the downward branch port 302 is
Although polluted foam is easily discharged from A, if the water to be treated has a relatively low degree of contamination, it may be difficult for the polluted foam to be discharged through the guide pipe 302. Therefore, it is preferable to provide a discharge pipe 30B for discharging polluted foam on the upper side of the aeration tank B.
Typically, most of the dirty foam is discharged through this discharge pipe 306.

As described above, the purification sterilization apparatus according to the present invention is
After operating for about an hour, the discharge pipe 30B of aeration tank B
The color tone of the dirty foam discharged to the outside from the downward branch port 302A of the guide pipe 302 gradually becomes pale (and eventually the discharge stops, so it is possible to confirm the completion of the purification and sterilization process. After confirming that the on-off valve 12 in the storage tank A is in the closed state, pumps P-1 and P-2 are
operation was stopped to stop water circulation, the on-off valve 14 was opened, and the pump P-3 was driven to send water in the storage tank A to the post-treatment tank. When the treated water that had passed through the filtration chamber 60 and reached the water storage chamber 70 was sampled and observed, no suspended matter was observed, and it was odorless and had a sparkling color.

In addition, when the amount of water to be treated is small, the water to be treated sent to storage tank A is immediately sent to aeration tank B, and the ozone generator C and ultraviolet irradiation device 32 are activated, and the water to be treated passes through storage tank A. The treatment can be carried out only by water circulation in the aeration tank B due to the lift-up effect of ozone-containing air bubbles, and the water to be treated can be used for primary processing of seafood, such as opening fish. In the case of so-called "waste water", the treated water that has been purified and sterilized and sent out from storage tank A or aeration tank B can be discharged into the street without being sent to a post-treatment tank.

From the above results, we are confident that the water purification and sterilization device according to the present invention has the desired effects, and therefore we have adopted the device shown in the drawings based on its design concept and philosophy. Without deviating from the above, we manufactured a compact and simplified portable modification device, and used the modification device and seawater as the water to be treated (collected at high tide in front of the Choshi Port Market) at an analytical institution (Incorporated Association). , Tokyo Food Sanitation Association) and commissioned an inspection to measure the seawater purification effect of the device.

The test method and results are as follows, and the modified device,
Furthermore, the apparatus according to the above-mentioned embodiments was proved to have excellent purification and sterilization ability.

Test 1: a) Test method: Operate the device using 60 liters of raw water, sample water at regular intervals, and measure pIN, COD (ll1g/l), color (degrees), turbidity (degrees), and odor. Measure the evening of the night.

b) Test results The results were as shown in Table 1 below.

Test 2 a) Test method Prepare bacteria-contaminated water by adding Escherichia coli to raw water GOIJ, operate the device using this bacteria-contaminated water, and sample water at regular intervals to determine the amount of raw material per ml. Measure the number of bacteria and coliform bacteria.

b) Test results The results are as shown in Table 2 below, and even when treating seawater that has been forcibly contaminated with bacteria, the number of viable bacteria decreases significantly within a treatment time of about 3G - 80 minutes. There was found.

(Storability test of open-dried fish products) Trial 1" a) Sample Mackerel immediately after landing was used as a sample.

b) Preparation of test samples and control samples Divide the mackerel as samples into 1 group of 10 tails. Control group A: Pumped well water was used; Control group B: Seawater pumped into a tank was used as it was, opened and treated, and then cooled with cold air. Test samples and control samples Man and B were prepared by drying.

C) Test method The test sample and control samples A and B were each sealed in a styrofoam box of the same shape and size, stored at a temperature of 100C for 3 days, and then opened to check the appearance and odor. Then, after storing for an additional 4 days (7 days in total) under the same conditions as above, the package was opened again and the same checks were performed.

d) Test results The test samples can be distinguished from those immediately after processing after storage for 3 days, and no generation of so-called "neto" was observed even after storage for 7 days, and there was no particular change in odor. I didn't have any, so I baked it and tried it, and it was delicious.

On the other hand, in both control samples A and Ill, it was confirmed that after 3 days of storage, the generation of nettle and the occurrence of an off-odor caused by the netting were observed, and the degree of this was stronger in the sample in which well water was used as the processed water. After being stored for 7 days, the surfaces of both control samples exhibited a considerable degree of "stickiness," turned yellow to whitish, and emitted a strong odor, making them unsuitable for cooking and should be discarded. I had no choice.

(Effects of the Invention) According to the water purification sterilization device of the present invention, freshwater or seawater to be treated is irradiated with ozone-containing bubbles and ultraviolet rays mainly having a wavelength of 254 nm, which has extremely high sterilizing power, in the aeration tank. It is processed in a complex manner by receiving it. Therefore,
Since the aeration tank that constitutes the main part of the apparatus of the present invention has extremely high processing efficiency, it enables rapid purification and sterilization of contaminated water and also enables miniaturization.

In the apparatus according to the present invention, the ozone generator that sub-types the ozone-containing air sent to the aeration tank can be constructed using a commercially available low-pressure mercury lamp. The ultraviolet irradiation device that irradiates the above-mentioned ultraviolet rays mainly with a wavelength of 254n++ can also be constructed by using a commercially available low-pressure mercury lamp and housing it in a protection tube against water, so it is easy to configure and maintain the entire device. is easy.

Furthermore, if the purified sterilized water treated with the apparatus according to the present invention is used as water for the primary processing of seafood, for example, for washing in the preparation of raw-dried processed products, the shelf life of the products can be significantly improved. I can do it.

Furthermore, the apparatus according to the present invention can purify and sterilize the water that has been used in the above-mentioned mechanical processing as water to be treated, and therefore can be used as a pollution control device to prevent pollution of oceans and rivers. It is also applicable to

[Brief explanation of drawings]

Fig. 1 is a drawing showing an outline of the water purification sterilization apparatus according to the present invention, and is a drawing shown in longitudinal section or partially broken section to show the structure of each component equipment. FIG. 2 is a schematic diagram for explaining the combined effect that water to be treated receives in an aeration tank due to ozone-containing bubbles and ultraviolet irradiation. A--1 hill of water to be treated 1, B--1 aeration tank, C--ozone generator, D--1 post-treatment tank, P-1, P-2--
1. Pump for circulating water to be treated, 32--ultraviolet irradiation device, 34--bubble generator, 40--ultraviolet lamp, 5
2--1 ultraviolet lamp (for ozone generation), 60-m-filtration chamber, B2--m1 water chamber

Claims (7)

[Claims] (1) A storage tank into which the water to be treated is introduced, an aeration tank, piping that connects the storage tank and the aeration tank, and a pump that sends the water to be treated from the storage tank to the aeration tank via the piping; The aeration tank is equipped with an ultraviolet irradiation device and a bubble generator, and the bubble generator is supplied with ozone-containing air from the ozone generator. characterized in that the water to be treated is subjected to the combined action of ultraviolet rays and ozone-containing bubbles in the aeration tank,
Water purification sterilization equipment. (2) The post-treatment tank further includes a filtration treatment chamber and a water storage chamber, and the filtration treatment chamber is connected to at least one of the storage tank and the aeration tank by piping, and extends from the lower stage to the upper stage. The water purification sterilization device according to claim 1, further comprising a primary storage section for incoming water and a calcium material filling section, and wherein the water storage chamber is equipped with an overflow mechanism. . (3) The upper and lower ends of the ultraviolet irradiation device in the aeration tank are opened,
An outer cylinder that has an opening on the upper side and is placed upright in the aeration tank, and an inner cylinder that is placed inside this outer cylinder and has an open top end and a closed end that prevents ultraviolet rays from entering the tank. An inner cylinder made of a transparent material and attached to the above-mentioned outer cylinder in a liquid-tight state, and an inner cylinder that is placed inside the inner cylinder and irradiates ultraviolet rays mainly having a wavelength of about 254 nm. It is characterized by being composed of an ultraviolet lamp,
The water purification sterilization device according to claim (1) or (2). (4) The ozone generator is composed of an outer cylinder equipped with an air introduction hole and an ozone-containing air exhaust hole, and an ultraviolet lamp that is placed and fixed inside the outer cylinder and emits ultraviolet light with a wavelength of about 185 nm. Claim (1) or (
2) The water purification sterilization device described in 2). (5) The calcium material filling section in the after-treatment tank is formed of a shell layer, and this shell layer has a coarsely crushed coral shell layer from the lower layer to the upper layer, which is the direction in which the incoming water passes;
A shell layer selected from oyster and scallop shells and crushed,
The water purification sterilization device according to claim 2, characterized in that the water purification sterilization device is comprised of a coral sand layer. (6) A plurality of inner cylinders each containing an ultraviolet lamp are arranged in the aeration tank, and at least one of these ultraviolet lamps is a lamp that emits ozone rays with a wavelength of 185 nm, and the others are The water purification and sterilization device according to claim 3, characterized in that the lamp emits germicidal resonance radiation having a wavelength of about 254 nm. (7) In the aeration tank, the wavelength is approximately 254 nm or approximately 25 nm.
Purified sterilized water that has been sufficiently treated by being exposed to UV irradiation of 4 nm and about 185 nm and contacting with ozone-containing bubbles, and then passed through a post-treatment tank having a filtration chamber filled with calcium material, is used for seafood processing. A method for maintaining the freshness of processed seafood, characterized by using it as water.