JP2000116276A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifier capable of removing phosphoric acid in water in the water tank. SOLUTION: This water purifier D1 is such one as to be equipped with a water tank 1 for raising fishes-and-shellfishes or the like, a filtration tank 10, a water holding tank 2, a decoloration tank 3, a set of electrodes 4, a direct current source for supplying electric current to the electrodes 4, a pumping pipe 6, a pump 7, and a return pipe 12; wherein the filtration tank 10 is set up along a path ranging from the pumping pipe 6 to the water holding tank 2 and internally housed with a filter 11 for both the physical and biological filtration of underwater suspended matter including fishes-and-shellfishes' excreta and residual baits; the water holding tank 2 is intended to remove phosphoric acid in the water in the water tank 1 and set up between the filtration tank 10 and the decoloration tank 3; and the electrodes 4, each of which is made of a rectangular iron plate, serve to leach out iron ions by the aid of electrolysis so as to remove the above-mentioned phosphoric acid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water purification device,
More specifically, the present invention relates to a water purification device for purifying water in an aquarium by removing organic matter such as manure and residual food of living things (such as seafood, turtles and aquatic insects) bred in the aquarium.

[0002]

2. Description of the Related Art Conventionally, in a water tank for breeding creatures, whenever the water quality deteriorates, the water in the water tank is replaced or a water purification device is provided, and the water is purified by the purification device. I am trying to do it.

In the latter case, the water purification device is
Equipped with a filtration tank, pump water from the water tank into this filtration tank with a circulation pump, etc., and filter through the filtration tank (physical filtration and biological filtration)
It is known that the water is returned to a water tank after the water is discharged. Such a water purification device can remove organic substances such as manure and residual food from fish and shellfish, and other substances such as ammonia.

[0004]

However, in such a water purifying apparatus, phosphoric acid increases in the water in the water tank due to the organic matter. Then, algae and aquatic plants are generated in the water tank, and these adhere to the wall surface of the water tank.

[0005] For this reason, not only is it difficult to observe and appreciate the bred fish and the like, but also the dissolved oxygen in the water is reduced, which may cause an oxygen deficiency state. In addition, there is a problem that it is necessary to frequently remove algae and aquatic plants or exchange water, which is troublesome.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a water purification device capable of removing phosphoric acid contained in water in a water tank.

[0007]

According to the present invention, an aquarium for breeding creatures, a filtration unit for storing water in the aquarium and filtering organic matter in the water, and water for passing through the filtration unit are stored. A water storage tank, disposed in the water storage tank, at least one set of electrodes for eluting iron ions or aluminum ions by electrolysis to precipitate and remove phosphoric acid in the water, and a power supply for supplying power to the electrodes. A water purifying apparatus, comprising: a transfer unit for transferring water in the water tank to the filtration unit; and a return unit for returning water purified by the filtration unit and the water storage tank to the water tank.

[0008] The filtration unit is disposed outside or inside (underwater) of the water tank, such as above or beside the water tank. The water storage tank is arranged outside the water tank, such as above or on the side of the water tank.

[0009] The electrodes are, for example, rectangular plates each having a predetermined arrangement in pairs, and elutes iron ions or aluminum ions into the water storage tank by electrolysis. A power supply supplies a current for electrolysis to each set of electrodes.

One set of electrodes is, for example, both iron (or aluminum) electrodes, or one is an iron (or aluminum) electrode and the other is an insoluble metal electrode.

In the former case, passivation of the electrode can be prevented by inverting the polarity of the electrode as desired.
In the latter case, an iron (or aluminum) electrode is used as an anode, and an insoluble metal electrode is used as a cathode. Here, examples of the insoluble metal electrode include a silver electrode and a platinum electrode. Preferably, the pair of electrodes is fixed to, for example, an electrically insulative electrode holder, and the interval between the electrodes is kept constant.

Iron ions or aluminum ions eluted into the water storage tank by electrolysis react with phosphoric acid (orthophosphoric acid) in water to form a water-insoluble phosphorus compound (Fe (O
H) _x (PO ₄ ) _y or Al (OH) _x (P
O ₄ ) _y ) and aggregate, and partly settles and accumulates in the water storage tank. The deposited phosphorus compounds are periodically discarded.
Therefore, the phosphoric acid contained in the water in the water tank can be removed in the water storage tank.

The water in the water tank is subjected to physical filtration and / or biological filtration at a filtration section, and after water suspended matter such as organic matter such as fish and urine and residual food is captured and removed, the water is removed. Since the electrolysis is performed in the storage tank, adverse effects of suspended matter in the water during the electrolysis in the water storage tank (such as making the electrodes nonconductive due to the volume of the suspended matter between the electrodes and preventing the phosphorus compound generation reaction, etc.) ) Can be prevented.

The transfer means transfers the water in the water tank directly to the filtration unit or indirectly through other components. For example, the transfer means includes a pumping pipe and a pump for pumping the water in the water tank. Can be The return means is for returning the water purified by the filtration unit and the water storage tank directly to the water tank or indirectly via another component, for example, a return for returning the purified water to the water tank. Tubes are used.

[0015] In the water purification apparatus according to the present invention, more preferably, the filtration section comprises a filtration tank disposed above the water tank and incorporating a filter for performing physical filtration and / or biological filtration. Here, as the filter, for example, a needle punch type nonwoven fabric made of polypropylene as a raw material is preferably used.

[0016] With the water purifying apparatus configured as described above, the water in the water tank is transferred to the filtration tank by the transfer means, subjected to physical filtration and / or biological filtration by the filter of the filtration tank, and excreted in the fish and manure. After the suspended matter in the water including the organic matter such as the bait is captured and removed, the water is subjected to the electrolysis in the water storage tank. Therefore, it is possible to reliably prevent the adverse effect of the suspended matter in water during electrolysis in the water storage tank with a simple configuration.

[0017] In the water purification apparatus according to the present invention, more preferably, the filtration unit includes a filter arranged in the water tank for performing physical filtration and / or biological filtration.

[0018] With the water purification apparatus configured as described above, the water in the water tank is subjected to physical filtration and / or biological filtration by a filter to capture and remove the suspended matter, and then the water is stored in the water storage tank. Will be subject to decomposition. Therefore, it is possible to reliably prevent the adverse effect of the suspended matter in water during electrolysis in the water storage tank with a simple configuration.

[0019] The water purification apparatus according to the present invention further preferably further comprises, between the water storage tank and the return means, a colored substance produced by a reaction between iron ions or aluminum ions eluted in the water storage tank and phosphoric acid. A decolorizing section for removing the water-insoluble phosphorus compound. As the decolorizing part, for example, a decolorizing tank connected to a return pipe above the water tank and incorporating a filter for removing phosphorus compounds is used. Here, in addition to the above-mentioned nonwoven fabric, for example, a collection of a large number of circular pipes made of polypropylene resin and having a length of about 10 mm, an outer diameter of about 6 mm, and an inner diameter of about 3 mm is preferably used. With such a configuration of the water purification device, it is possible to easily remove the phosphorous compound as well as the colored phosphorus compound.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Note that the present invention is not limited by this.

As shown in FIGS. 1 to 3, a water purifying apparatus D1 according to _one embodiment of the present invention includes a water tank 1, a filtration tank 10 as a filtration unit, and a downstream side of the filtration tank 10. A current is supplied to the provided water storage tank 2, a decolorization tank 3 provided as a decolorizing part provided downstream of the water storage tank 2, a set of electrodes 4.4 in the water storage tank 2, and an electrode 4.4. DC power supply (not shown) for supplying, electrode holder 5, pumping tube 6 and pumping pump 7 as transfer means, and return pipe 12 as return means
And

The aquarium 1 is for breeding seafood and the like, and is formed of a box having a substantially rectangular planar shape. Filtration tank 1
0 is provided on the path from the pumping pipe 6 to the water storage tank 2;
A filter 11 for physically filtering and biologically filtering suspended matter in water including organic matter such as manure and residual food of fish and shellfish is incorporated. The filter 11 is a needle-punch type nonwoven fabric made of polypropylene as a raw material (as an example, a basis weight: 400 g / m ² , a thickness of 4.0 mm, and a gas permeability of 1).
60 cc / cm ² / sec). The water in the water tank 1 is pumped up to a filtration tank 10 through a suction pipe 6 and subjected to physical filtration and biological filtration by the filter 11 to capture and remove suspended matter in water.

The water storage tank 2 is for removing phosphoric acid in water in the water tank 1, is provided between the filtration tank 10 and the decolorization tank 3, and is provided on the opening edge of the water tank 1. It is placed on the lid 8. The water in the water tank 1 is pumped into the filtration tank 10 by the pumping pipe 6 and the pump 7.

A pair of electrodes 4 in the water storage tank 2 are
Each of them is a rectangular plate-like iron plate, and elutes iron ions for removing phosphoric acid in water by electrolysis. The electrode holder 5 has an electrical insulation property, is attached to the upper ends of the electrodes 4, and keeps a constant distance between them.

The iron ions eluted into the water storage tank 2 by electrolysis react with phosphoric acid (orthophosphoric acid) in the water to form a colored water-insoluble phosphorus compound (Fe (OH) _x (P
O ₄ ) _y ) and agglomerate, a part of which is suspended in water and the other part is deposited and deposited in the water storage tank 2.

The decolorization tank 3 is for removing the phosphorus compound floating in the water and flowing through the advancing ports 2a of the water storage tank 2, and is provided adjacent to the water storage tank 2. A filter 9 for removing the phosphorus compound and performing biological filtration is incorporated. The filter 9 is made of polypropylene resin and has a length of about 10 mm, an outer diameter of about 6 mm,
A large number of hollow cylinders having an inner diameter of about 3 mm are stored in a bag.

The return pipe 12 is adjacent to the decolorization tank 3 and has an inner lid 8.
Through the decolorizing tank 3 to return the water that has been purified and has flown out of the advection port 3a below the tank to the water tank 1.

In FIG. 1, reference numeral 13 denotes an outer cover which covers the edge of the end wall of the inner cover 8, which is a filtration tank 10, a water storage tank 2, a decolorizing tank 3, a pumping tube 6, a pumping pump 7, and a return pump. Covers tube 12. Reference numeral 16 denotes a strainer connected to the pumping pipe 6, and reference numeral 21 denotes a gravel layer disposed at the bottom of the water tank 1.

1 and 2, reference numeral 17 denotes a water storage tank 2.
Aerating tube located at the bottom of the aerial. The aeration pipe 17 is connected to a supply pipe 19 from an air supply blower 18 arranged outside the water storage tank 2.
Compressed air is supplied to the bottom portion of the water storage tank 2 through the through-hole, and the surfaces of the electrodes 4 are washed by generated bubbles. Also, 20
Denotes a control unit, which controls the operation of the pump 7 and the blower 18 and controls the electrolysis of the water storage tank 2.

In FIG. 1 to FIG. 3, reference numeral 14 denotes an electrode fixing plate having an opening 14 a formed in the center, which is used to connect a pair of electrodes 4 attached to an electrode holder 5 to the opening 14 a.
And fixed with screws 15.

[0031] The flow sheet of water purification process in water purification apparatuses D ₁ constructed as described above is shown in FIG.

[0032] Although this In the water purification apparatuses D ₁ is the bleaching tank 3 disposed downstream of the water storage tank 2, the water purification apparatus of the present invention is not limited thereto, bleaching tank 3 It may not be. Further, in this embodiment, the case where the filtration tank (the filtration unit) is disposed above the water tank has been described.
The filtration unit may be a filter arranged in a water tank for performing physical filtration and / or biological filtration.

[0033]

According to the first aspect of the present invention, an aquarium for breeding organisms, a filtering unit for storing water in the aquarium and filtering organic matter in the water, and a water for storing the water passing through the filtering unit. Water storage tank, at least one set of electrodes disposed in the water storage tank, and eluting iron ions or aluminum ions by electrolysis to precipitate and remove phosphoric acid in water, and a power supply for supplying power to the electrodes And a transfer means for transferring the water in the water tank to the filtration section, and a return means for returning the water purified in the filtration section and the water storage tank to the water tank. Therefore, phosphoric acid contained in the water in the water tank can be aggregated as a water-insoluble phosphorus compound in the water storage tank and can be stably and reliably removed. In addition, the water in the water tank is subjected to physical filtration and / or biological filtration in the filtration unit, and after the suspended matter in the water including the organic matter such as fish excreta and residual food is captured and removed, the water in the water storage tank is removed. Because of being subjected to the electrolysis, adverse effects due to suspended matter in the water during electrolysis in the water storage tank (for example, non-conductivity of the electrode due to the volume of the suspended matter between the electrodes and prevention of the phosphorus compound generation reaction).
Can be prevented.

According to the second aspect of the present invention, the filtration section is provided above the water tank and includes a filtration tank having a built-in filter for performing physical filtration and / or biological filtration. Therefore, the water in the water tank is pumped up to the filtration tank through a pumping pipe, subjected to physical filtration and / or biological filtration by the filter, and the suspended matter in the water is captured and removed. Will receive it. Therefore, it is possible to reliably prevent the adverse effect of the suspended matter in water during electrolysis in the water storage tank with a simple configuration.

According to the third aspect of the present invention, the filtration unit is provided in the water tank and comprises a filter for performing physical filtration and / or biological filtration. Therefore, the water in the tank is
After being subjected to physical filtration and / or biological filtration by a filter and the suspended matter is captured and removed, the suspended matter is pumped up by a pumping pipe and subjected to the electrolysis in a water storage tank. Therefore, it is possible to reliably prevent the adverse effect of the suspended matter in water during electrolysis in the water storage tank with a simple configuration.

According to the fourth aspect of the present invention,
A decoloring section is provided between the water storage tank and the return means for removing a colored water-insoluble phosphorus compound generated by the reaction between iron ions or aluminum ions eluted in the water storage tank and phosphoric acid. Therefore, the colored phosphorus compound can be easily removed together with the phosphoric acid.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a water purification device according to one embodiment of the present invention.

FIG. 2 is a configuration explanatory view of an upper part of the water purification device of FIG. 1 as viewed from above.

FIG. 3 is an exploded perspective view of an upper portion of the water purification device of FIG.

FIG. 4 is a flow sheet of a water purification process in the water purification device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank 2 Water storage tank 3 Decoloring tank 4 Electrode 5 Electrode holder 6 Pumping tube 7 Pumping pump 8 Inner lid 9 Filter 10 Filtration tank 11 Filter 12 Return pipe 13 Outer lid 14 Electrode fixing plate 15 Screw 16 Strainer 17 Aeration tube 18 Blower 19 Air supply line 20 control unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C02F 1/52 C02F 1/46 102 3/06 F term (Reference) 2B104 ED05 ED12 ED36 EE12 EF09 4D003 AA01 AB13 BA02 CA02 CA03 EA16 EA30 4D061 DA06 DB19 DC13 EA03 EB01 EB04 EB18 EB19 EB28 FA13 FA15 4D062 BA19 BA21 BA28 BB05 CA18 DA12 EA02 EA32 FA01 FA02 FA15 FA26 4D064 AA07 BD11 BD12 BD16

Claims (4)

[Claims] 1. A water tank for breeding organisms, a filtration unit for storing water in the water tank and filtering organic matter in the water, a water storage tank for storing water passing through the filtration unit, and a water storage tank And at least one set of electrodes for eluting iron or aluminum ions by electrolysis for precipitating and removing phosphoric acid in water, a power supply for supplying power to the electrodes, and transferring water in the water tank to the filtration unit. A water purification apparatus comprising: a transfer unit; and a return unit that returns water purified by the filtration unit and the water storage tank to the water tank. 2. The water purification apparatus according to claim 1, wherein the filtration unit comprises a filtration tank disposed above the water tank and having a built-in filter for performing physical filtration and / or biological filtration. 3. The water purification apparatus according to claim 1, wherein the filtration unit comprises a filter disposed in the water tank for performing physical filtration and / or biological filtration. 4. Further, between the water storage tank and the return means,
The water purifier according to claim 2 or 3, further comprising a decolorizing section for removing a colored water-insoluble phosphorus compound generated by a reaction between the iron ions or aluminum ions eluted in the water storage tank and the phosphoric acid.