JPH07255321A - Suspension removing device and water cleaning device and pisciculture device with no water exchange using these devices - Google Patents

Abstract

PURPOSE:To provide a pisciculture device designed to conduct fish storage or fish culture without the need for exchanging the seawater in a pisciculture tank. CONSTITUTION:Both ends of a water supply piping 3 are connected to a pisciculture tank 2 to form a circulating water channel 4. The water supply piping 3 is indirectly equipped with a feed pump 5, a suspension removing device 6 and a water cleaning device 7. A treating liquid for the pisciculture tank 2 is circulated through the channel 4 in an one-way fashion. The treatment tank 13 for the suspension removing device 6 is equipped with a revolving mechanism 14 and a bubble generator 16. The outlet end of the piping 3 is projectedly set up on the treatment tank 13. The cleaning tank 12 of the water cleaning device 7 is provided with an aerobic chamber 18 and an anaerobic chamber 29 with a treating liquid-passable partition board 26 sandwiched in between. The aerobic chamber 28 is equipped with a bubble generator 37. Both the aerobic chamber 28 and anaerobic chamber 29 are equipped with cleaning panels 34, respectively. Numerous microbes are made to inhabit a cleaning composition in the cleaning panels 34. And, the cleaning tank 12 is equipped with an electronic heating/cooling element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension removing device and a water purification device for purifying seawater containing impurities in a fish tank as a liquid to be treated, and to change seawater in the fish tank using these devices. The present invention relates to a non-exchanged water aquaculture device that enables fish storage and aquaculture without a fish.

[0002]

2. Description of the Related Art So-called fish stocks for stocking captured saltwater fish as live fish and aquaculture of hatched fry are seawater in the bay (the liquid to be treated used in the following description is synonymous with seawater. Depending on the necessity of expression, it is performed by directly circulating seawater in a cage that directly uses the liquid to be treated or seawater) or an artificial fish tank on land. Of these, fish farming in fish cages is susceptible to industrial wastewater, domestic wastewater, pollution of seawater itself such as red tide, and weather, so that fish storage and aquaculture using a fish tank has been receiving attention in recent years.

[0003]

However, in such artificial fish storage and aquaculture, a small amount of seawater in a fish tank is used for excretion of saltwater fish, metabolites such as body fluids and scales, residual food, and garbage. ， Because it is contaminated with impurities such as rust, a separate water purification device must be used, but the porous materials such as barley stone, ceramics and zeolite used as adsorbents in this water purification device decompose impurities. The treatment capacity for removal was low, and seawater could not be sufficiently purified.

Therefore, not only the septic tank of the water purification device needs to be backwashed frequently and the adsorbent needs to be replaced in a relatively short period of time, but also regular replacement of seawater is required. It was very expensive and time consuming. Further, in the above-mentioned water purification device, in order to secure a certain amount of treatment capacity, it is necessary to have the same volume as that of the fish tank, and it cannot be installed without a considerable space. In general, for the storage and cultivation of saltwater fish, it is necessary to manage the seawater in a fish tank within a temperature range of approximately 15 to 20 ° C, cooling in summer and heating in winter. Since the cooling device is of a motor type, it consumes a lot of power and is extremely noisy. Also, because seawater is cooled through the cooling pipe, rust occurs on the cooling pipe and other parts, and the service life of the cooling device is as short as about 2 years. It was a thing. Furthermore, in recent years, various non-exchange water aquaculture devices have been proposed, which do not require long-term exchange of seawater in a fish tank, but none of them can treat impurities sufficiently satisfactorily. The treatment of ammonia eluted from the feed into the liquid to be treated was performed only by adsorption with an adsorbent, and the decomposition treatment by microorganisms was not effectively performed. In addition, water-soluble phosphates such as sodium, potassium, and ammonium phosphates, which are harmful when accumulated, are mostly removed by the microorganisms living in the porous material of the adsorbent, but are hardly removed from the liquid to be treated. It was impossible, and it was a major factor in alienating the development of the non-exchange water culture device.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water purification apparatus for decomposing impurities contained in seawater in a fish tank by using effective microorganisms. , By treating with a suspension removal device that separates other impurities that cannot be decomposed by microorganisms, and effectively removes the water-soluble phosphate in the impurities that were previously difficult to remove, using both these devices, The aim is to enable fish storage and aquaculture without changing the seawater in the fish tank for a long time.

[0006]

In order to achieve the above-mentioned object, the suspension removing apparatus according to the first aspect of the present invention has a rotating shaft provided upright inside the processing tank for storing the liquid to be processed, and the upper end of the rotating shaft. Suspended foam discharge blades, the rotating blades are respectively attached to the lower end, the bubble generator is arranged at the bottom of the treatment tank, and the outlet side end of the water supply pipe is projectingly arranged inside the treatment tank. A part of the liquid to be treated supplied from the water supply pipe to the treatment tank is branched to the rotary blade.

Further, in the water purification apparatus of the second aspect of the present invention, a partition plate through which the water to be treated can flow is sandwiched inside the septic tank, and an aerobic chamber is provided on the introduction side of the liquid to be treated and the liquid to be treated is discharged. A anaerobic chamber is provided on the side, a bubble generator is disposed at the bottom of the aerobic chamber, and the aerobic chamber and the anaerobic chamber each contain a deposited volcanic ash, zeolite, sedimentary rock, shell powder and magnesium oxide purification composition. An electronic heating / cooling element is provided on the outer surface of the septic tank by disposing a purifying panel containing the substances and keeping the septic tank in a predetermined temperature range.

In the third aspect of the invention, both ends of the water supply pipe are connected to the fish culture tank to form a circulating water path, and a feed pump for circulating the liquid to be treated in the fish culture tank in one direction is interposed in the water supply pipe. At the same time, the non-exchange water culture device is constructed by interposing the suspension removing device on the upstream side of the water supply pipe and the water purification device on the downstream side.

[0009]

In the suspension removing apparatus of the first aspect of the invention, the blade to be rotated is rotated by the water pressure of the liquid to be treated supplied from the water supply pipe to the treatment tank, and the suspension bubble discharging blade at the upper end of the rotating shaft is integrally rotated. The liquid to be treated inside the treatment tank flows due to the water pressure of the liquid to be treated newly supplied from the water supply pipe, and the bubbles from the bubble generator are agitated in this flowing liquid to be treated, so that many liquids are present on the liquid surface of the liquid to be treated. Suspended bubbles are generated. Impurities mixed in the liquid to be treated are separated into floating impurities and precipitated impurities in the upper and lower parts of the liquid to be treated by this stirring. The suspended impurities separated in the upper part of the liquid to be treated combine with the suspension bubbles on the surface of the liquid to be treated, and are discharged together with the suspension bubbles to the outside of the treatment tank by the rotating suspension bubble discharge blades. Precipitated impurities separated into the lower part of the treatment liquid settle at the bottom of the treatment tank and are discharged to the outside of the treatment tank.

The purification composition of the purification panel used in the water purification apparatus of the second invention is sedimentary volcanic ash, zeolite, sedimentary rock,
What is obtained by kneading shell powder and magnesium oxide and drying and solidifying this is used.
A large number of minute and complicated spaces for fixing microorganisms are formed. A larger number of microorganisms settle in the space of the purification composition than in the past.

A variety of useful aerobic and anaerobic microorganisms inhabit the purification composition of the purification panel for the aerobic chamber and the anaerobic chamber to decompose various impurities in the liquid to be treated. There are nitrite bacteria and nitric acid bacteria as aerobic microorganisms in the aerobic chamber. The nitrite bacteria decompose ammonia in impurities into nitrite, and the nitrite bacteria decompose into nitric acid. Further, there are denitrifying bacteria as anaerobic microorganisms in the anaerobic chamber, and the denitrifying bacteria decompose nitric acid from the aerobic chamber into nitrogen gas and release it into the atmosphere. A part of the water-soluble phosphate eluted from excrement and residual food into the liquid to be treated is used by aerobic and anaerobic microorganisms in the water purification device, and the other is contained as minerals in the deposited volcanic ash of the purification composition. When combined with aluminum and calcium, it becomes a solid substance that precipitates or floats in the liquid to be treated and is rendered harmless.

Further, the precipitated solid matter in the aerobic chamber and the anaerobic chamber and other residues are collected at the bottom of the treatment tank and discharged to the outside of the treatment tank.

The septic tank of the water purification apparatus is made of, for example, a stainless steel plate having excellent thermal conductivity, and the septic tank is heated by an electronic heating / cooling element in the summer to heat it in the winter to keep it in a predetermined temperature range. , Through this septic tank, the temperature of the liquid to be treated,
The temperature is always kept in the range of 14 ° C to 20 ° C, preferably about 17 ° C, which is suitable for seawater fish.

The feed pump used in the non-exchanged water fish farming apparatus of the third invention may be installed at any position of the water supply pipe as long as it can circulate the liquid to be treated in the fish tank in one direction. In order to effectively rotate the rotary blade installed in the processing tank of the turbidity removing device by the pressure of the liquid to be processed,
It is preferably installed upstream of the suspension removing device.

In the suspension removing device, as a pretreatment of the liquid to be treated sent to the water purification device, impurities which are difficult to be removed from the impurities in the liquid to be treated by the purification composition of the water purification device are the water pressure and bubbles of the liquid to be treated. The liquid to be treated is separated into upper and lower parts by the bubbles from the generator, and is discharged from the upper and lower parts of the processing tank. The water-soluble phosphate solids that did not settle in the purification tank in the water purification device enter the treatment tank of the suspension removal device through the fish tank, and are separated above and below the liquid to be treated together with other impurities. The liquid to be treated is discharged to the outside, and the liquid to be treated is supplied to the water purification device.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The non-exchanged water aquaculture apparatus 1 connects the both ends of a water supply pipe 3 to a fish tank 2 for storing seawater as a liquid to be treated to form a circulating water path 4, and the water supply pipe 3 has an upstream side of the liquid to be treated. From the above, the feed pump 5, the suspension removal device 6, and the water purification device 7 are sequentially installed, and the seawater in the fish tank 2 to be treated is driven by the feed pump 5. After being circulated in the circulating water path 4 in the direction of the arrow in FIG. 1 to remove impurities by the suspension removing device 6 and the water purification device 7, the water is recycled from the water supply pipe 3 to the fish tank 2. ing.

The water supply pipe 3 includes a first pipe 8 connecting the fish tank 2 and the feed pump 5, a second pipe 9 connecting the feed pump 5 and the suspension removing device 6, and the suspension removing device. Third pipe 10 connecting 6 and the water purification device 7, and the water purification device 7
And a fourth pipe 11 that connects the fish tank 2 to the fish tank 2.
The first pipe 8, which is the treated liquid introduction side of the water supply pipe 3, is horizontally placed near the bottom of the fish tank 2 where impurities are likely to accumulate.
Further, the fourth pipe 11 is hung vertically from the bottom wall side of the septic tank 12 of the water purification apparatus 7, and the end 11a of the water supply pipe 3 that serves as the treated liquid discharge port is immersed in the treated liquid of the fish tank 2. It is provided.

The downstream end 9a of the second pipe 9 is provided so as to project into the processing tank 13 of the suspension removing device 6, and the end 9a is provided.
The small-diameter branch pipe 9b branched from the above is oriented to the rotary blades 15 of the rotating mechanism 14, and the liquid to be treated in the fish tank 2 pumped up by the feed pump 5 is suspended and removed from the end 9a. 6
Is discharged at a high water pressure into the treatment tank 13 to cause the liquid to be treated in the treatment tank 13 to flow, and a part of the liquid to be treated is branched to the branch pipe 9b
Is sprung out toward the rotating blade 15 of the rotating mechanism 14 to rotate the rotating blade 15.

The upstream end 10b of the third pipe 10 is connected to a substantially intermediate position of the processing tank 13, is slightly higher than the connecting position of the downstream end 9a of the second pipe 9, and The downstream end 10a of the three pipes 10 is provided so as to project from the upper part of the septic tank 12 of the water purification device 7 into the inside thereof.

The suspension removing device 6 is provided with the above-mentioned rotating mechanism 14 and the bubble generator 16 in a vertically long processing tank 13 for storing a liquid to be processed, and suspends it on the outer surface of one side of the processing tank 13. A foam receiving container 17 is attached. The rotating mechanism 14 includes a vertical rotating shaft 19 supported on the inner wall of one side of the processing tank 13 via a bearing 18, and a suspension bubble discharging blade 20 fixed to the upper end of the rotating shaft 19. The rotating blade 19 is fixed to the lower end of the rotating shaft 19 and is rotated by the rotating blade 15 rotated by the liquid to be treated from the branch pipe 9b.
And the suspension foam discharge blade 20 rotate integrally. The suspension foam discharge vane 20 is composed of two large blades that are disposed above the liquid surface of the liquid to be treated and across the processing tank 13 and the suspension foam receiving container 17, and also the suspension foam. The liquid L containing the defoaming agent is appropriately stored in the receiving container 17.

The bottom wall 13a of the processing tank 13 is formed in a pyramidal shape, and a water-permeable bottom plate 21 is laid at an upper position of the bottom wall 13a, and the bubble generator 16 has the partition plate 21.
It is placed on the top of the treatment tank, and the air pump 22 is operated to generate fine bubbles in the liquid to be treated in the treatment tank 13.

The liquid to be treated in the treatment tank 13 flows due to the hydraulic pressure of the liquid to be treated newly supplied from the downstream end 9a of the second pipe 9, and the flowing liquid to be treated is discharged from the bubble generator 16. The bubbles are agitated, and a large number of suspended bubbles B are generated on the liquid surface of the liquid to be treated. The suspension bubbles B are discharged to the suspension bubble receiving container 17 by the suspension bubble discharging blades 20 rotating above the liquid surface of the liquid to be treated, fall into the liquid L containing the defoaming agent in the receiving container 17, and disappear. Then, it is discharged to the outside.

The septic tank 12 of the water purification device 7 is made of a material having a high thermal conductivity such as stainless steel. The outer surfaces of the side walls 12a, 12a are electrically heated by a plurality of electronic heating elements. A heat radiating plate 25 provided with cooling elements 24 and a large number of ventilation holes on the outside thereof.
However, it is provided at a distance from the electronic heating / cooling element 24.

The electronic heating / cooling element 24 is composed of a thermo-modulator, a radiator, and a fan, and applies a voltage to different conductors to cause a current to flow, and heats or cools the respective joints depending on the direction of the current flow. A plate-shaped heating / cooling body to which a thermoelectric phenomenon (Peltier effect) is applied (commercially available, for example, product name Thermocooler SAMOL manufactured by Nippon Blower Co., Ltd.), and this electronic heating / cooling element 24 has a thermostat (not shown). Combined, the septic tank 12 of the water purification device 7 is cooled in summer and heated in winter to be kept in a predetermined temperature range, and the liquid to be treated in the septic tank 12 is easily inhabited by the seawater fish F in the fish tank 2. C. to 20.degree. C., preferably 17
It is designed to automatically keep the temperature around ℃.

Inside the septic tank 12, two partition plates 26,
27 is divided into three chambers, the downstream side end portion 10b of the third pipe 10 has an aerobic chamber 28 on the introduction side of the liquid to be treated, and a central chamber is an anaerobic chamber 29. A small chamber partitioned by the partition plate 27 from the anaerobic chamber 29 is a flow chamber 30. Further, the upper portion of the septic tank 12 is opened so that the nitrogen gas decomposed in the tank can be easily released into the atmosphere.

Partition plate 2 between aerobic chamber 28 and anaerobic chamber 29
A punching metal or the like that allows the liquid to be treated to flow is used for 6, and the liquid to be treated introduced into the aerobic chamber 28 is the partition plate 2
6 can be distributed to the anaerobic chamber 29.
A water distribution pipe 31 is provided on the partition plate 27 between the anaerobic chamber 29 and the flow chamber 30 so as to project above the flow chamber 30, and the treated object is purified by the aerobic chamber 28 and the anaerobic chamber 29. The liquid flows out to the flow chamber 30 through the water pipe 31, passes through the mat 32 of the flow chamber 30, and is discharged to the fourth pipe 11.

The bottom walls 12b of the aerobic chamber 28 and the anaerobic chamber 29 are formed in an integral pyramid shape, and a water-permeable bottom plate 33 is provided above the bottom wall 12b to cover the aerobic chamber 28 and the anaerobic chamber 29. The partition plate 26 is erected on the bottom plate 33, and a plurality of purification panels 34 are provided in the aerobic chamber 28 and the anaerobic chamber 29, respectively, for the flow of the liquid to be treated. They are arranged in the orthogonal direction.

The purification panel 34 is a box-shaped panel 35 having a small hole 35a for water passage and filled with a large number of minute purification compositions 36. It contains zeolite, sedimentary rock, shell powder and magnesium oxide, and these components are preferably mixed with 30% of deposited volcanic ash, 30% of zeolite, 15% of sedimentary rock, 10% of shell powder and 15% of magnesium oxide, and these are kneaded. After that, it is dried and solidified into a short cylindrical shape. A large number of fine and complicated spaces are formed inside the purification composition 36 thus formed, and the aerobic chamber 28
The aerobic microorganisms such as nitrite bacteria and nitric acid bacteria are contained in the purification composition 36 of the purification panel 34 provided in FIG. Anaerobic microorganisms such as nitrifying bacteria are settled and inhabited by a much larger number than before.

On the bottom plate 33 of the aerobic chamber 28, the air pump 2
A bubble generator 37 connected to 2 is provided, and bubbles (oxygen) are supplied from the bubble generator 37 to the liquid to be treated in the aerobic chamber 28 to keep the aerobic microorganisms inhabitable. .
Further, the purification panels 34 of the aerobic chamber 28 and the anaerobic chamber 29 are alternately biased to the side of the septic tank 12 by the receiving piece 38 and the supporting rod 39, and are held in the purification panel 34 by this configuration. In addition to passing the liquid to be treated through, part of the liquid is passed through between the side wall 12a of the septic tank 12 so that the flow velocity of the liquid to be treated is constant.

Next, the operation of the non-exchanged water culture apparatus 1 constructed as described above will be described. The liquid to be treated in the fish tank 2 pumped up by the feed pump 5 is supplied to the treatment tank 13 of the suspension removing device 6 at a high pressure through the second pipe 9 of the water supply pipe 3, and the treatment liquid in the treatment tank 13 is processed. The liquid is caused to flow, and a part of the liquid to be processed is fed from the branch pipe 9b to the rotating blade 15 of the rotating mechanism 14.
It is blown out to and the suspension bubble discharge blade 20 is rotated. Also,
The bubbles generated by the bubble generator 16 at the bottom of the treatment tank 13 are agitated with the flowing liquid to be treated to generate a large number of suspended bubbles B on the liquid surface of the liquid to be treated.

Excretions from seawater fish F, metabolites such as body fluids and scales, impurities such as residual food, dust and rust contained in the liquid to be treated from the fish tank 2 are treated by stirring the liquid to be treated. The floating impurities separated into floating impurities and precipitated impurities in the upper and lower parts of the liquid, and the floating impurities separated in the upper part of the liquid to be treated are combined with the suspension bubbles B on the liquid surface, and suspended by the rotating suspension bubble discharging blade 20. The suspended foam B is discharged together with the suspended foam receiving container 17, drops into the defoaming agent-containing liquid L in the receiving container 17, disappears, and is discharged to the outside. On the other hand, the precipitated impurities separated into the lower part of the liquid to be treated pass through the bottom plate 21 and are treated in the treatment tank 13
Settles on the bottom wall 13a of the above, and is further discharged to the outside through a discharge pipe 40 connected to the bottom wall 13a.

In this way, in the suspension removing device 6, miscellaneous impurities such as dust and impurities difficult to be treated by the microorganisms of the water purification device 7 are removed as suspended impurities and precipitated impurities, and the second impurities are removed from the treatment tank 13. In addition to ammonia, proteins, carbohydrates, fats, etc., the liquid to be treated discharged to the pipe 9
Water-soluble phosphates such as sodium phosphate, potassium and ammonium are contained as impurities.

From the second pipe 9 to the septic tank 1 of the water purification device 7.
The liquid to be treated supplied to 2 enters the purification panels 34 of the aerobic chamber 28 and the anaerobic chamber 29, and impurities such as ammonia and proteins are decomposed by various microorganisms of the purification composition 36.

Among the above impurities, Table 1 shows the treatment of ammonia and water-soluble phosphate, which has been difficult to remove from the liquid to be treated conventionally.

[0035]

[Table 1] Ammonia that has entered the aerobic chamber 28 is decomposed into nitrite by the nitrite bacteria in the aerobic chamber 28, and the nitrite is decomposed into nitric acid by the nitric acid bacteria. Next, in the anaerobic chamber 29, the aerobic chamber 2
The denitrifying bacteria decompose the nitric acid from 8 and release it into the atmosphere as nitrogen gas. In addition, a part of the water-soluble phosphate such as sodium phosphate, potassium, and ammonium phosphate is partially used in the aerobic chamber 28.
And aerobic and anaerobic microorganisms in the anaerobic chamber 29 are used, and the others are combined with aluminum and calcium contained as minerals in the deposited volcanic ash of the purification composition 36 to become a solid substance that precipitates or floats in the liquid to be treated and is harmless. Be converted. The various precipitated impurities decomposed in the aerobic chamber 28 and the anaerobic chamber 29 pass through the bottom plate 33 and settle on the bottom wall 12b of the septic tank 12, and further to the outside through the discharge pipe 41 connected to the center of the bottom wall 12b. It is discharged.

On the other hand, the remaining floating impurities that do not settle through the flow chamber 30 of the septic tank 12 and once enter the fish farm 2.
Together with other impurities newly generated in the fish tank 2, they enter the treatment tank 13 of the suspension removing device 6, are separated into upper and lower parts of the liquid to be treated, and are discharged to the outside of the treatment tank. The seawater in the fish tank is
In this way, the purification is repeated in the non-exchanged water aquaculture device 1 as the liquid to be treated.

Next, Table 2 shows the results of the water quality test of the flounder culture performed using the non-exchanged water culture apparatus of this example.

<Conditions> 1. Fish to be cultured ... 100 flounder (fry), total weight 30g,
Average length 3 cm, average weight 0.3 g 2. Liquid to be treated: 2 tons of natural seawater 3. 3. Amount of the cleaning composition used in the cleaning panel ... 50 kg 4. Exam period: December 15, 1992-January 1, 1994
5 days for 13 months (currently ongoing) 5. Water quality analysis contents: Seawater in the fish tank is sampled every week (however, the table shows the analysis value every month), and the water temperature, turbidity, dissolved oxygen (DO), ammonia, nitrous acid, nitric acid, Eight items of phosphoric acid and pH were analyzed and measured.

[0039]

[Table 2] According to the water quality analysis and measurement values shown in Table 2 for each item,
It can be seen that the liquid to be treated (natural seawater) is maintained in a very good water quality for the cultivation of saltwater fish (hirame). In particular, regarding the turbidity of the liquid to be treated, if the turbidity is 10 ppm or less, it is said to be 5 ppm or less, while it is said that the water quality looks almost transparent to the naked eye, and that the purification function of the purification composition is excellent. Is clearly shown.

Further, the concentrations of ammonia and nitrite, which are harmful to fish farming, are maintained at extremely low values, but many nitrifying bacteria such as nitrite bacteria and nitric acid bacteria that have the ability to detoxify them are stable. Since it inhabits the purification composition, it shows that the purification composition is suitable as a habitat for these beneficial microorganisms.

Further, nitric acid as a water pollutant is decomposed by denitrifying bacteria settled in the cleaning composition, and phosphoric acid as a water pollutant is also adsorbed by aluminum and calcium contained in the cleaning composition. It is removed as free-floating and sparingly-soluble phosphate, and any residual value is within a low level.

As described above, in the flounder culture test using the non-exchanged water culture apparatus of this example, the survival rate at the 13th month was 77.
%, The survival rate from fry to adult fish was 40 to 50% in the conventional general flounder culture, and the survival rate was 1.5 to 2 times as high. The yield was good and adult fish with a higher growth rate than conventional aquaculture were obtained.

The inspiration used for the experimental fish is generally 50.
It is considered to be an adult fish when it exceeds 0 g, and it exceeds 600 g 7
Since it is impossible to cultivate seven adult flounders in a 2t capacity fish tank, these flounders are currently divided into two identical fish tanks and the test is continued.

Further, a fish farming experiment using the non-exchanged water fish farming apparatus of the present embodiment is currently being conducted at one live fish store, and even after one year and six months have passed since the start of the experiment, turbidity of seawater and seawater There is almost no death of fish, and how many years it can be used with non-exchanged water is still ongoing.

In the suspension removing apparatus of the above embodiment, the suspension foam receiving container and the liquid containing the antifoaming agent were used. However, if the suspension foam can be discharged to the outside of the processing tank without being contaminated, these may be omitted. It doesn't matter. In addition, the feed pump may be installed in another portion of the water supply pipe depending on the arrangement conditions of the fish tank, the suspension removing device, and the water purification device.

Further, the electronic heating / cooling element used for keeping the temperature of the liquid to be treated in the water purification apparatus may be artificially operated other than thermo control.

[0047]

According to the suspension removing apparatus of the present invention, a rotating shaft is erected inside the processing tank, and a suspension bubble discharging blade is provided at the upper end of the rotating shaft.
Rotating blades are attached to the lower ends respectively, a bubble generator is disposed at the bottom of the treatment tank, and the outlet side end of the water supply pipe is arranged inside the treatment tank so as to project from the water supply pipe to the treatment tank. By branching a part of the liquid to be treated to the rotary blade, various impurities such as dust in the liquid to be treated and impurities that are difficult to treat by the microorganisms of the water purification device are treated as suspended impurities or precipitated impurities in the septic tank. Since it is effectively discharged to the outside,
It is suitable as a pretreatment device for a water purification device that purifies by using microorganisms.

Further, a suspension foam discharge blade for discharging suspended bubbles on the liquid surface of the liquid to be treated combined with floating impurities to the outside of the purification tank is utilized by using the pressure of the liquid to be treated supplied from the water supply pipe to the treatment tank. Since it operates, a drive device such as a motor and power energy are not required, and it can be manufactured at low cost. Moreover, since consumables such as a filter are not used, running cost can be kept low.

In the water purification apparatus of the present invention, sedimentary volcanic ash, zeolite, sedimentary rock,
By arranging the purification panel containing the purification composition containing shell powder and magnesium oxide, a large number of fine and complicated spaces are formed inside the purification composition, and various microorganisms are contained in this space more than before. Since a large number can be made to live, ammonia, proteins, carbohydrates, fats, etc. contained in the liquid to be treated from the fish tank can be effectively decomposed.

In particular, water-soluble phosphates such as sodium, potassium and ammonium phosphates from saltwater fish and residual bait which could not be removed by the prior art are combined with the deposited volcanic ash of the cleaning composition to form a liquid to be treated. Since the solid matter that precipitates or floats on the surface becomes solid and is rendered harmless, the liquid to be treated discharged from the septic tank is sufficiently purified so as not to adversely affect the storage and culture of saltwater fish.

Further, since the heat insulating material for the liquid to be treated provided in the septic tank is an electronic heating / cooling element which does not use a driving device such as a motor, there is no noise or extra heat exhaust, and the power consumption can be kept small. In addition, since it is not necessary to cool the cooling pipes by passing seawater, no rust is generated and the durability can be greatly extended. Further, since the microorganisms are effectively settled and live in many spaces of the purification composition, the septic tank can be formed more compactly than before, and in combination with the adoption of a small and lightweight electronic heating / cooling element, a small space can be obtained. It can also be installed.

Further, according to the non-exchange water culture apparatus of the present invention, the suspension removing apparatus and the water purification apparatus described above are combined with a fish tank and a feed pump for circulating the seawater in the fish tank in one direction. Even in the inland area away from the coast, fish can be stored or cultivated without exchanging the seawater in the fish tank for a long time, and the shipping cost can be reduced.

[Brief description of drawings]

FIG. 1 is an overall view of a non-exchanged water aquaculture device showing an embodiment of the present invention

FIG. 2 is a cross-sectional plan view of a suspension removing device used in the non-exchanged water culture device of FIG.

FIG. 3 is a partial cross-sectional front view of a water purification device used in the non-exchanged water culture device of FIG.

4 is a cross-sectional plan view of the water purification device shown in FIG.

5 is a partial cross-sectional perspective view of a purification panel used in the water purification device of FIGS.

6 is a perspective view of a cleaning composition used in the cleaning panel of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Unexchanged water fish culture apparatus 2 ... Fish tank 3 ... Water supply piping which consists of 1st piping 8, 2nd piping 9, 3rd piping 10 and 4th piping 11 ... Circulating water path 5 ... Delivery pump 6 ... Suspension Removal device 7 ... Water purification device 12 ... Separation tank of water purification device 13 ... Treatment tank of suspension removal device 6 ... Rotating mechanism composed of rotating blade 15, rotating shaft 19, and suspended foam discharging blade 20 ... Rotating blade 16 ... Bubble generator in the treatment tank 13 ... Suspended foam receiving container 19 ... Rotating shaft 20 ... Suspended foam discharge blade 22 ... Air pump 24 ... Electronic heating / cooling element 26 ... Aerobic chamber 28 and Anaerobic chamber 29 A partition plate 27 for partitioning the liquid to be treated, which partitions the liquid to be treated, a partition plate 28 for partitioning the anaerobic chamber 29 and the flow chamber 30, an aerobic chamber 29, an anaerobic chamber 31, a water pipe 34, a purification panel 35, and a purification composition. Wrapping panel 36 ... Purifying composition 37 ... Arranged in aerobic chamber 28 Bubble generator B ... Suspension bubbles generated on the liquid surface of the liquid to be treated in the treatment tank 13 F ... Seawater fish in the fish tank 2

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location C02F 3/30 A 9/00 501 F J H 502 Z 503 Z 504 A

Claims (3)

[Claims] 1. A bottom portion of the processing tank, wherein a rotating shaft is erected inside a processing tank for storing a liquid to be processed, a suspension bubble discharging blade is attached to an upper end of the rotating shaft, and a rotating blade is attached to a lower end thereof. A bubble generator is installed in the treatment tank, and the outlet side end of the water supply pipe is projectingly arranged inside the treatment tank, and a part of the liquid to be treated supplied from the water supply pipe to the treatment tank is branched to the rotary blade. Suspension removal device. 2. An aerobic chamber is provided on the introduction side of the liquid to be treated, and an anaerobic chamber is provided on the discharge side of the liquid to be treated, with partition plates through which the liquid to be treated is sandwiched inside the septic tank. An air bubble generator is provided at the bottom of the air chamber, and each of the aerobic chamber and the anaerobic chamber is provided with a purification panel containing a purification composition containing deposited volcanic ash, zeolite, sedimentary rock, shell powder and magnesium oxide, A water purification device having an electronic heating / cooling element for keeping the septic tank in a predetermined temperature range on the outer surface of the septic tank. 3. A circulating water path is formed by connecting both ends of a water supply pipe to the fish tank, and a feed pump for circulating the liquid to be treated in the fish tank in one direction is provided in the water supply pipe.
A non-exchanged water-cultivating device in which the suspension removing device is provided on the upstream side of the water supply pipe and the water purification device is provided on the downstream side.