JP2930947B1 - Equipment for removing heavy metals from living organisms - Google Patents

Abstract

Kind Code: A1 Abstract: By removing oils and fats dispersed in an electrolytic solution before sending it to an electrolytic cell, cations of heavy metals can be efficiently deposited on a cathode in the electrolytic cell. A living body in which a heavy metal and an oil or fat are contained in a living body or an electrolytic solution which dissolves and ionizes the living body and the heavy metal is stored in an immersion tank. The electrolyte delivered from the immersion tank is stored in the oil / fat separation tank 16, and a fat / oil aggregating vibrator 42 for applying ultrasonic vibration to the electrolyte is provided below the oil / fat separation tank. The grease 12 floating on the electrolyte surface is discharged from the grease separation tank by the grease discharging means 17. The electrolytic solution sent from the oil / fat separation tank is stored in the electrolytic tank 18, and an anode 51 and a cathode 52 are provided in the electrolytic tank.
A DC power supply 53 connected to the anode and the cathode applies a predetermined voltage between the anode and the cathode to deposit heavy metal cations eluted in the electrolyte on the cathode, and the electrolyte in the electrolytic cell is immersed by the circulation means 56. Returned to the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing heavy metals contained in living organisms such as marine products and agricultural products from living organisms. More specifically, the present invention relates to an apparatus suitable for removing heavy metals such as cadmium and lead contained in living bodies of scallops that have been landfilled as industrial waste.

[0002]

2. Description of the Related Art Conventionally, as an apparatus of this type, a living body containing a heavy metal in a living body and an electrolyte are stored in an immersion tank.
An anode and a cathode are arranged at a predetermined interval in the electrolytic cell,
The circulating means sends the electrolytic solution in the immersion tank to the electrolytic cell and returns the electrolytic solution in the electrolytic tank to the immersion tank. Further, a DC power supply electrically connected to the anode and the cathode applies a voltage between the anode and the cathode. An apparatus configured to remove heavy metals contained in living organisms is disclosed (JP-A-9-47257).

[0003] In the apparatus for removing heavy metals configured as described above, heavy metals contained in the living body of a living organism are gradually eluted into the electrolyte by immersion in the electrolyte in an immersion tank to become cations. The electrolytic solution from which the cations have been eluted is sent out to the electrolytic cell via the circulation means. When a DC voltage is applied to the anode and the cathode of the electrolytic cell, the cation heavy metal is deposited on the cathode, and the cation heavy metal is removed from the electrolytic solution in the electrolytic cell, and the cation is transferred to the immersion tank via the circulation means. Will be returned. As a result, the removal rate of heavy metals from living organisms becomes extremely high, and washing of living organisms after treatment can be performed in a short time, and operations associated with an increase in the throughput of living organisms can be performed easily. ing.

[0004]

However, in the apparatus for removing heavy metals contained in living organisms described in the above-mentioned conventional Japanese Patent Application Laid-Open No. 9-47257, cations of heavy metals are eluted into the electrolyte in an immersion tank. At the same time, the fats and oils contained in the living body of the living body may be separated from the living body and dispersed in the electrolytic solution, and this fat and oil may adhere to the anode and cathode surfaces of the electrolytic cell. As a result, the surface area of the anode and the cathode contributing to the electrolysis is reduced, and the current density in the electrolytic solution is reduced, so that the amount of heavy metal cations deposited on the cathode is reduced. An object of the present invention is to remove heavy metals contained in living organisms by removing fats and oils dispersed in an electrolytic solution in advance before sending them to an electrolytic cell, whereby cations of heavy metals can be efficiently deposited on a cathode in the electrolytic cell. It is to provide a device.

[0005]

The invention according to claim 1 is
As shown in FIG. 1 and FIG. 3, a living body 11 f containing a heavy metal and an oil or fat 12 in a living body 11 f or a sulfuric acid solution, a hydrochloric acid solution, a sodium hydroxide solution or a sodium chloride solution in which the living body 11 f and the heavy metal are dissolved and ionized. Immersion tank 14 in which electrolytic solution 13 is stored, and electrolytic solution 13 containing oil 12 in which electrolytic solution 13 delivered from immersion tank 14 is stored and separated from biological body 11 or living body 11f and dispersed.
The oil / fat separation tank 16 provided at the bottom with a fat / oil aggregating element 42 for applying ultrasonic vibration to the oil / fat separation tank 16 and the oil / fat 12 floated on the surface of the electrolyte 13 by the oil / fat aggregating element 42 provided on the top of the oil / fat separation tank 16 An oil / fat discharging means 17 for discharging the oil / fat separating tank 16, an electrolytic tank 18 in which the electrolytic solution 13 sent out from the oil / fat separating tank 16 is stored, and an anode 51 and a cathode 52 are arranged at a predetermined interval; A direct current power supply 53 electrically connected to the cathode 51 and the cathode 52 to apply a predetermined voltage between the anode 51 and the cathode 52 to deposit cations of heavy metals eluted in the electrolytic solution 13 on the cathode 52; Circulating means 56 for sending the electrolytic solution 13 to the electrolytic bath 18 via the oil / fat separating bath 16 and returning the electrolytic solution 13 in the electrolytic bath 18 to the immersion bath 14
This is a device for removing heavy metals contained in living organisms comprising:

In the apparatus for removing heavy metals according to the first aspect, the heavy metals contained in the living body 11f are gradually eluted into the electrolyte 13 by being immersed in the electrolyte 13 in the immersion tank 14, and become cations. The fats and oils 12 contained in the living body 11f are dispersed in the electrolyte solution 13, and the cations are eluted and the electrolyte solution 13 in which the fats and oils are dispersed is sent out to the fat and oil separation tank 16 by the circulation means 56. Ultrasonic vibration is applied to the electrolyte 13 by a vibrator 42 for agglomeration of fats and oils.
The fats and oils 12 in 3 are agglomerated and float on the surface of the electrolyte 13.
The grease 12 floating on the surface of the electrolyte 13 is
The electrolytic solution 13 discharged from the oil / fat separation tank 16 from which the oil / fat 12 has been removed is sent to the electrolytic tank 18. Electrolyzer 18
In this case, a predetermined voltage is applied between the anode 51 and the cathode 52 by the DC power supply 53, and heavy metal cations in the electrolytic solution 13 are deposited on the cathode 52 and removed. The electrolytic solution 13 is returned to the immersion tank 14 by the circulation means 56.

[0007] The invention according to claim 2 is the invention according to claim 1, and further includes an immersion tank 1 as shown in FIGS.
4 is characterized in that a penetrating vibrator 32 for applying ultrasonic vibration to the living body 11 or the living body 11f is provided at the bottom of the living body 11.
In the heavy metal removing apparatus according to the second aspect, since the ultrasonic vibration is applied to the living body 11 or the living body 11f in the immersion tank 14 by the permeation vibrator 32, the electrolytic solution 13 is supplied to the living body 11 or the living body 11f. Quickly penetrate into the organism 11
Alternatively, heavy metals contained in the living body 11f become cations and are quickly eluted into the electrolytic solution 13, and furthermore, the fats and oils 12 in the living body 11 or the living body 11f are separated from the living body 11f and the electrolyte 1
Disperse into 3.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the cathode 52 or 82 is provided on the bottom of the electrolytic cell 18 or the lower surface of the cathode 82, as shown in FIG. 1 or FIG.
The electrode cleaning vibrator 54 or 94 for applying ultrasonic vibration to the electrode cleaning device. In the heavy metal removing apparatus according to the third aspect, the electrode cleaning vibrator 54 or 9 is used.
4. Ultrasonic vibration is applied to the anode 51 and the cathode 52 or the cathode 82 by 4, so that the oil 12 or hydrogen bubbles adhered to the surface of the anode 51 and the cathode 52 or the surface of the cathode 82 are quickly discharged from the anode 51 and the cathode 52 or the cathode 82. Detached, anode 5
1 and the surface of the cathode 52 or the cathode 82 are always kept clean.

The invention according to claim 4 is the invention according to claims 1 to 3
In any of the inventions described above, as further shown in FIGS. 1 to 3, the immersion tank 14 is formed to extend along the transport direction of the living body 11 or the living body 11 f, and the living body 11 or the living body 11 f is formed.
Are stored in the plurality of buckets 25, and the plurality of buckets 25
Are transported along the transport direction of the living body 11 or the living body 11 f at predetermined intervals by the transporting means 26, and when the plurality of buckets 25 are transported, the living organisms 11 in the plurality of buckets 25 are transported.
Alternatively, the living body 11f is configured to be immersed in the electrolytic solution 13 of the immersion tank 14. In the apparatus for removing heavy metals according to the fourth aspect, the living body 11 or the living body 1 is removed.
1f to remove the heavy metal from the living body 11 or the living body 11
f can be performed continuously and automatically,
It is suitable for treating a large amount of the living body 11 or the living body 11f.

The invention according to claim 5 is the invention according to claims 1 to 3
The invention according to any of the above, and as shown in FIG.
The organism or living body 11f is accommodated in a bucket 75, and the bucket 75 is inserted into the immersion tank 74 by the bucket elevating means 71 and pulled up. When the bucket 75 is inserted into the immersion tank 74, the organism or living body 11f in the bucket 75 is removed. The immersion tank 74 is characterized by being immersed in the electrolyte 13. In the heavy metal removal apparatus according to the fifth aspect, the heavy metal removal treatment from the living body or the living body 11f and the defatting treatment of the living body or the living body 11f can be performed with a small amount of the electrolytic solution 13. Body or living body 11f
Suitable for processing.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. Organisms containing heavy metals in the living body include scallops, fish and shellfish (marine products) such as squid, and organisms such as animals, agricultural products or plants. Heavy metals include cadmium, lead, arsenic, mercury, copper, and the like. Examples include heavy metals such as zinc, nickel, chromium, manganese, and cobalt. In addition, as a living body containing a heavy metal, a scallop or a squid fish and shellfish, etc., for example, a living body 11f of a scallop 11 shown in FIG.
1c and a kidney 11e attached to the side surface of the scallop 11a. Note that reference numeral 11b in FIG. 3 denotes a ligament,
Reference numeral 11d denotes a mantle called a string. As shown in FIG. 1, the heavy metal removing device 10 is delivered from an immersion tank 14 in which a living body 11 f containing heavy metals and fats and oils 12 and an electrolytic solution 13 for dissolving and ionizing heavy metals are stored, and an immersion tank 14. An oil / fat separation tank 16 in which an electrolyte 13 is stored;
Oil / fat discharge means 17 provided at the top of oil / fat separation tank 16
And an electrolytic tank 18 in which the electrolytic solution 13 sent from the oil / fat separating tank 16 is stored.

The immersion tank 14 is formed so as to extend along the transport direction of the living body 11f, and a washing tank formed in a bucket outlet 14a of the immersion tank 14 through the first draining plate 21 to have substantially the same shape as the immersion tank 14. Nineteen bucket inlets 19a are connected (FIG. 2). Water 23 or a neutralizing agent is stored in the washing tank 19, and a second drain plate 22 is provided at a bucket outlet 19 b of the washing tank 19. The living body 11f is housed in a plurality of buckets 25 (FIGS. 1 and 2), and these buckets 25 allow the electrolyte 13 and water 23 or a neutralizing agent to pass therethrough and the living body 1
1f is a basket formed in a mesh or lattice shape so as not to pass, and the bottom net 25a is configured to be openable and closable. Dipping tank 1
A transporting means 26 capable of transporting the bucket 25 at predetermined intervals along the longitudinal direction of the immersion tank 14 is provided above the immersion tank 14. The transporting means 26 is a lift type conveyor in this embodiment, and has a protruding C-shaped rail 27 provided along the transporting direction of the living body 11f, and a plurality of shafted rollers 28 which can roll inside the rail 27. And a chain 3 for connecting the plurality of shaft portions 28a at predetermined intervals to hooks 29 suspended from the shaft portions 28a of these shaft-mounted rollers 28.
And 1.

The rail 27 is formed in an oval shape, and
4 and a forward path 27a (FIG. 2) provided above the cleaning tank 19, and a return path (not shown) provided at a position deviated from above the immersion tank 14 and the cleaning tank 19 and substantially parallel to the forward path 27a. ) And a pair of connecting portions (not shown) for connecting both ends of the outward path portion 27a and the return path portion. In the forward path 27a, the bucket inlets 14a, 19 of the immersion tank 14 and the cleaning tank 19 are provided.
The first and second downward slopes 27b and 27c are formed opposite to the first and second downward slopes 27d and 27e, respectively, facing the immersion tank 14 and the bucket outlets 14b and 19b of the washing tank 19. Each is formed. Further, a first lower horizontal portion 27f is formed between the first descending inclined portion 27b and the first climbing inclined portion 27d, and a second lower horizontal portion is formed between the second descending inclined portion 27c and the second climbing inclined portion 27e. A horizontal portion 27g is formed. Reference numerals 27h, 27i and 27j in FIG. 2 denote first, second and third upper horizontal portions. Also, a plurality of buckets 25 are suspended from a plurality of hooks 29, respectively.
Although not shown, the chain 31 is driven by a motor with a speed reducer via a driving sprocket. Thereby, the roller 28 with a shaft rolls on the inner surface of the rail 27, and the bucket 25 suspended by the hook 29 is transported at a predetermined interval and at a predetermined speed along the transport direction of the living body 11f. Is done. The transport speed is set so that the immersion time of the living body 11f in the bucket 25 in the electrolyte 13 is 4 to 24 hours.

At the bottom of the immersion tank 14, a plurality of penetrating vibrators 32 for applying ultrasonic vibration to the living body 11f are provided at predetermined intervals. As shown in detail in FIG. 5, these penetrating vibrators 32 are a pair of arm portions 32a, 32a, and are substantially inverted U-shaped ferrite vibrators called magnetostrictive or π-type. An exponential horn 33 is adhered to the upper surface of the vibrator 32, and the tip of the horn 33 is configured to contact the diaphragm 34. A coil 36 is wound around the pair of arms 32a, 32a of the vibrator 32,
A biasing magnet 37 is inserted between the pair of arms 32a. The coil 36 is connected to an ultrasonic power supply 38, that is, to an AC power supply via a matching circuit 38a, an output circuit 38b, an ultrasonic oscillation circuit 38c, and a power supply circuit 38d. The ultrasonic oscillation circuit 38c and the output circuit 38b
, The oscillation frequency and output to the coil 36 can be adjusted. When a current whose oscillation frequency and output have been adjusted flows through the coil 36, an alternating magnetic field corresponding to the current is generated in the vibrator 32, and the electrolyte 13 flows through the vibrating plate 34.
It is configured to apply ultrasonic vibration to the inside living body 11f at a predetermined frequency and a predetermined amplitude. Preferably, the frequency of the ultrasonic vibration is set in a range of 18 kHz to 60 kHz, and the power thereof is set in a range of 0.5 to ⁴ kW / cm ² .

On the other hand, a living body washing vibrator 39 for applying ultrasonic vibration to the living body 11f is also provided at a predetermined interval at the bottom of the washing tank 19 (FIG. 2). The living body vibrator 39 has the same configuration as the permeation vibrator 32, and is connected to the ultrasonic power supply 38 in the same manner as described above (FIG. 5). Cleaning tank 1
9 near the bucket outlet 19b.
1 is provided. The conveyor 41 includes a hopper 41a for receiving the living body 11f dropped from the bucket 25, a guide cylinder 41b connected to the hopper 41a and extending horizontally, a shaft 41c rotatably inserted into the guide cylinder 41b, and a shaft. 41d spirally fixed to the outer peripheral surface of 41c
And a motor section 41e for driving the shaft section 41c.

Examples of the electrolyte 13 include a sulfuric acid solution, a sodium hydroxide solution, a sodium chloride solution, a hydrochloric acid solution and a nitric acid solution. When a sulfuric acid solution is used as the electrolytic solution 13, the concentration of the sulfuric acid solution is set in the range of 0.5 to 20% by volume, preferably 1 to 3% by volume. The reason why the concentration is set to 0.5 to 20% by volume is that if the concentration is less than 0.5% by volume, heavy metals contained in the living body 11f cannot be efficiently deposited on the cathode 52 (FIG. 1), and the concentration is 20% by volume. %, There is a problem that the living body 11f is degraded, and a long time is required for the neutralization treatment of the living body 11f after removing heavy metals. In addition, the temperature of the electrolytic solution 13 is from room temperature to
It is preferable that the temperature is set in the range of 40 ° C. If the temperature exceeds 40 ° C., the living body 11f is boiled. When a neutralizing agent is stored in the washing tank 19 instead of the water 23, an alkaline neutralizing agent is used for an acidic electrolytic solution,
An acidic neutralizing agent is used for an alkaline electrolyte.

At the lower part of the oil / fat separating tank 16, there is provided a vibrator 42 for aggregating oil / fat which applies ultrasonic vibration to the electrolyte 13 containing the oil / fat 12 separated from the living body 11f and dispersed therein (FIG. 1). The vibrator 42 has substantially the same configuration as the penetrating vibrator 32, and is connected to the ultrasonic power supply 38 as described above (FIG. 5). Ultrasonic vibration is applied to the electrolyte 13 in the oil / fat separation tank 16 at a predetermined frequency and a predetermined amplitude by the vibrator 42, and the oil / fat 12 dispersed in the electrolyte 13 is aggregated. Reference numeral 43 in FIG. 1 is a reflection plate provided in the oil / fat separation tank 16 for efficiently transmitting ultrasonic vibrations to the electrolyte 13.

The lower end of the oil / fat discharging means 17 is
A belt conveyor 46 which is in contact with the liquid surface of the electrolytic solution 13 and whose upper end is inclined so as to face the oil / fat recovery tank 44, and a number of belt conveyors 46 projecting from the outer peripheral surface of the belt 46c of the conveyor 46 at predetermined intervals. Schema 47 and the conveyor 46
And a guide plate 48 that is inclined at the same angle as above and extends from substantially the center of the oil and fat separation tank 16 to above the oil and fat recovery tank 44 (FIG. 1). The belt conveyor 46 is provided above the oil / fat recovery tank 16 and driven by a motor with a reduction gear (not shown), and a driven pulley 46b provided to be in contact with the surface of the electrolyte 13 of the oil / fat separation tank 16. And an endless belt 46c stretched over these pulleys 46a and 46b.
Consists of

In the electrolytic cell 18, anodes 51 and cathodes 52 are alternately arranged at predetermined intervals, and the anodes 51 and the cathodes 52 are formed in a plate shape in this embodiment (FIGS. 1 and 4). . An electrically insulating spacer (not shown) is interposed between the adjacent anode 51 and cathode 52, and the predetermined distance is maintained without contact between the adjacent anode 51 and cathode 52 by the spacer. It is configured to be. The anode 51 and the cathode 52 are made of graphite, conductive ferrite, platinum, gold, titanium, carbon, stainless steel, cadmium, copper, zinc, aluminum, alloys of these metals, titanium having a gold thin film formed on the surface, insoluble metal. Is formed of titanium having a platinum thin film formed on its surface, titanium having a graphite thin film formed on its surface, copper having cadmium formed on its surface, or the like. Further, the immersion tank 14, the washing tank 19, the oil / fat separation tank 16 and the electrolytic tank 18 are made of glass, vinyl chloride resin, polystyrene resin, polyethylene resin,
Each is formed of FRP or acrylic resin.

The anode 51 is connected to a positive terminal of a DC power supply 53, and the cathode 52 is connected to a negative terminal (FIG. 1). A predetermined voltage is applied between the anode 51 and the cathode 52 by the DC power supply 53, and the heavy metal cations eluted in the electrolyte 13 are deposited on the cathode 52. Between the anode 51 and cathode 52 voltage -V ₁ is applied, ie FIGS. 6 (a) is an anode 51 as shown in the ground, and a DC voltage of -V ₁ is applied to the cathode 52. V ₁
Is preferably set to 1.5 to 28 V, more preferably 1.5 to 12 V, and the current at this time is 200 to 20,000.
A, and more preferably 1000 to 2000A. This current can be appropriately changed depending on the heavy metal content in the living body 11f and the processing amount of the living body 11f. Also 2000
When a current exceeding A flows, the temperature of the electrolytic solution 13 rises and the living body 11f may be boiled. An electrode cleaning vibrator 54 for applying ultrasonic vibration to the anode 51 and the cathode 52 is provided at the bottom of the electrolytic cell 18. The vibrator 54 has substantially the same configuration as the penetrating vibrator 32, and is connected to the ultrasonic power supply 38 in the same manner as described above (FIG. 5). The vibrator 54 applies ultrasonic vibration to the anode 51 and the cathode 52 at a predetermined frequency and a predetermined amplitude via the electrolytic solution 13 in the electrolytic cell 18, so that the oil and fat 1 adhering to the surfaces of the anode 51 and the cathode 52 are removed.
2 and hydrogen bubbles attached to the surface of the cathode 52 (not shown)
Is configured to be disengaged.

An immersion tank 14, an oil / fat separation tank 16, and an electrolytic tank 18
Are connected to each other by the circulation means 56 (FIG. 1). Liquid outlets 14d, 16b, 18b of the electrolytic solution 13 are formed on upper side surfaces of these tanks 14, 16, 18 respectively, and liquid inlets 14c, 16a, 18a of the electrolytic solution 13 are formed on lower side surfaces, respectively. The liquid outlet 14d of the immersion tank 14 is the first
The outlet of the first pump 58a is connected to the suction port of the first pump 58a via an overflow pipe 57a, and the liquid inlet 16a of the oil and fat separation tank 16 is connected to the discharge port of the first oil pump 58a via a first supply pipe 59a.
Connected to. The liquid outlet 16b of the oil / fat separation tank 16 is connected to a second pump 58b through a second overflow pipe 57b.
Of the second pump 58b is connected to the suction port of the second pump 58b.
It is connected to the liquid inlet 18a of the electrolytic cell 18 via the supply pipe 59b. Further, a liquid outlet 18b of the electrolytic cell 18 is connected to a suction port of a third pump 58c via a third overflow pipe 57c, and a discharge port of the third pump 58c is connected to a liquid inlet of the immersion tank 14 via a third supply pipe 59c. 14c. The first to third pumps 58a to 58c are driven by an electric motor (not shown). The electrolyte 13 stored in the immersion tank 14 is sent to the oil / fat separation tank 16 by the first pump 58a of the circulating means 56, and the electrolyte 13 stored in the oil / fat separation tank 16 is sent to the electrolyte 18 by the second pump 58b. The electrolytic solution 13 stored in the electrolytic cell 18 is returned to the immersion tank 14 by the third pump 58c. Reference numeral 60 in FIGS. 1 and 2 denotes a hood provided above the immersion tank 14, the oil / fat separation tank 16, the electrolytic tank 18 and the cleaning tank 19 for receiving gas evaporated from the electrolytic solution 13.
0a is a duct for discharging the gas.

In this embodiment, the bucket contains the living body containing heavy metal, but the bucket may contain the living body itself containing heavy metal in the living body. Further, in this embodiment, a lift-type conveyor has been described as the conveying means, but a roller conveyor, a belt conveyor, or other conveying means may be used. In this embodiment, a magnetostrictive or π-type vibrator has been described, but an electrostrictive vibrator such as a piezoelectric ceramic may be used. Further, in this embodiment, the exponential horn is adhered to the vibrator, but a conical horn or other horn may be adhered, and the vibrator is directly adhered to the vibrator without attaching these horns. It may be stuck on. Further, the vibrator may be attached to the lower surface of the bottom wall of the immersion tank or the like via the horn or directly without using the vibrating plate. Further, a voltage may be applied between the anode and the cathode as shown in FIG. 6B or 6C. FIG. 6 (b)
If shown, the bias voltage of the anode + V ₂ is applied, and a DC voltage of -V ₁ is applied to the cathode. FIG.
If (c), the bias voltage of 0 to + V ₂ is applied to the anode, and a voltage of 0 to-V ₁ is applied to the cathode,
The repetition frequency of these voltages is preferably set to 5 to 1000 Hz. Said V ₂ is 0 to 1.5 V, V ₁ are preferably set in a range of 1.5～28V.

The operation of the thus configured heavy metal removing apparatus will be described. The electrolyte 13 is previously stored in the immersion tank 14, the oil / fat separation tank 16 and the electrolytic tank 18, and the first
To operate the third pumps 58a to 58c to
Is circulated, and the transport means 26 is operated at a predetermined speed. In this state, the living body 11f (FIGS. 1 to 3) taken out of the living body 11 (FIG. 3) is housed in a bucket 25, and the bucket 25 is hung on a hook 29 of a transport means 26 (FIGS. 1 and 2). . The bucket 25 is transported by the transport means 26 and gradually descends at the bucket entrance 14 a of the immersion tank 14, and the living body 11 f in the bucket 25 is immersed in the electrolyte 13 in the immersion tank 14. At this time, the living body 1 in the bucket 25
Ultrasonic vibration is given to 1f by the vibrating oscillator 32, and the bucket 25 moves in the electrolyte 13 at a predetermined speed together with the living body 11f.
f, the heavy metal contained in the living body 11f becomes a cation and elutes quickly into the electrolyte 13, and the fats and oils 12 in the living body 11f are separated from the living body 11f and dispersed in the electrolyte 13. By using the penetrating vibrator 32 in this manner, the concentration of the electrolytic solution 13 can be made extremely low, so that the cleaning time of the living body 11f can be reduced. .

The electrolyte 13 in the immersion tank 14 is supplied to a first pump 58
a, it is sent to the oil / fat separation tank 16 via the first overflow pipe 57a and the first supply pipe 59a. The ultrasonic vibration generated by the vibrator 42 for aggregating fats and oils is efficiently applied to the electrolyte 13 in the fat / oil separation tank 16 by the reflection plate 43. Surface quickly on the surface. The oil 12 floating on the surface of the electrolyte 13 is scraped off by the schema 47, passes over the guide plate 48, and is collected in the oil recovery tank 44. Fats and oils 1
The electrolyte 13 from which 2 has been removed is supplied to the second overflow pipe 57b and the second supply pipe 59b by the second pump 58b.
To the electrolytic cell 18 via the The electrolytic solution 13 flows into the electrolytic cell 18 from below, and an upward flow is generated in the electrolytic solution 13. Therefore, when a predetermined voltage is applied between the anode 51 and the cathode 52, the electrolytic solution 13 flows through the electrolytic cell 18. The cations in the electrolyte 13 are deposited on the cathode 52 while rising. As a result, the cation concentration contained in the electrolytic solution 13 at the bottom of the electrolytic cell 18 is the highest, and the cation concentration decreases as the electrolytic cell 18 is raised.
3 is discharged from the liquid outlet 18b above the electrolytic cell 18.
The discharged electrolyte 13 is supplied to a third overflow pipe 57c and a third supply pipe 59c by a third pump 58c.
Is returned to the immersion tank 14 via

In some cases, the fat 12 is slightly dispersed in the electrolytic solution 13 in the electrolytic cell 18, and the fat 12 may adhere to the surfaces of the anode 51 and the cathode 52. In some cases, hydrogen bubbles adhere to the surface of the cathode 52. However, ultrasonic vibration is applied to the anode 51 and the cathode 52 by the electrode cleaning vibrator 54, so that the oil 12 and hydrogen bubbles are quickly separated from the anode 51 and the cathode 52, and
1 and the surface of the cathode 52 are always kept clean. As a result, a decrease in the current density flowing through the electrolytic solution 13 can be prevented, so that the efficiency of depositing cations of heavy metals on the cathode 52 does not decrease.

On the other hand, the bucket 2 immersed in the immersion tank 14
5 gradually rises near the bucket outlet 14b of the immersion tank 14 and reaches above the first draining plate 21. Excess electrolyte 13 attached to the living body 11f in the bucket 25 is dropped and removed above the first draining plate 21. Next, the bucket 25 gradually descends near the bucket inlet 19 a of the washing tank 19, and the living body 11 f in the bucket 25
3 or immersed in a neutralizing agent. At this time, since the living body 11f in the bucket 25 is subjected to ultrasonic vibration by the living body washing vibrator 39, the electrolytic solution 13 in the living body 11f is quickly discharged from the inside of the living body 11f. As a result, the living body 11f
Can be performed in a shorter time. The living body 1
The water 23 and the like after washing 1f are discharged to a river or the like after being treated by a wastewater treatment apparatus (not shown) so as to be within a predetermined water quality reference value.

The bucket 25 reaching the vicinity of the bucket outlet 19b of the washing tank 19 gradually rises, and excess water 23 and the like are removed from the living body 11f above the second drain plate 22. When the bucket 25 arrives above the screw conveyor 41, the bottom net 25a opens automatically or manually, and the living body 11f in the bucket 25 falls to the hopper 41a. The living body 11f in the hopper 41a is a screw conveyor 4
1 and stored in a cart with a box (not shown) or the like. The washed living body 11f is used as fertilizer for agricultural products, feed for livestock, and the like. Further, the apparatus of this embodiment can continuously and automatically perform the heavy metal removal processing from the living body 11f and the defatting processing of the living body, and thus is suitable for processing a large amount of living body 11f.

FIG. 7 shows a second embodiment of the present invention.
7, the same reference numerals as those in FIG. 2 indicate the same parts. In this embodiment, the living body 11f is stored in the bucket 75,
The bucket 75 is moved by the bucket elevating means 71 to the immersion tank 74.
The living body 11f in the bucket 75 is immersed in the electrolyte 13 of the immersion tank 74 when the bucket 75 is inserted into the immersion tank 74. The bucket 75 is formed substantially the same as the bucket of the first embodiment, and the immersion tank 74 is formed slightly larger than the bucket 75. The bucket elevating means 71 includes a first elevating rail 71b having a first wheel 71a, and a first arm 7 which can move up and down along the rail 71b and can lock the bucket 75.
1c. The first arm 71c is configured to move up and down along the first elevating rail 71b manually or electrically. The penetrating vibrator 32 is provided at the bottom of the immersion tank 74 as in the first embodiment.

A stirrer 73 is inserted into the immersion tank 74, and the stirrer 73 is configured to be inserted into the immersion tank 74 by the stirrer elevating means 72 and pulled up. The stirrer elevating means 72 is configured substantially in the same manner as the bucket elevating means 71, and includes a second elevating rail 7 having a second wheel 72a.
2b and a second arm 72c that moves up and down along the rail 72b and has a stirrer 73 fixed at the tip. Further, although not shown, the immersion tank 74 is connected to the oil / fat separation tank and the electrolytic tank by a circulating means in the same manner as in the first embodiment, and the living body 1 subjected to the heavy metal removal treatment and the degreasing treatment in the immersion tank.
Although not shown, 1f is configured to be immersed and cleaned in the same cleaning tank as in the first embodiment or a cleaning tank having substantially the same shape as the immersion tank of this embodiment.

The operation of the thus configured heavy metal removing apparatus will be described. First, the bucket 7 containing the living body 11f
5 is locked to the first arm 71c of the bucket lifting / lowering means 71, and the lifting / lowering means 71 is transported to the vicinity of the immersion tank 74;
The first arm 74c is raised to a predetermined height together with the bucket 75. The raising / lowering means 71 is further moved closer to the immersion tank 74 so that the bucket 75 is positioned above the immersion tank 74.
When the arm 71c is lowered, the bucket 75
It is immersed in the electrolytic solution 13 of the immersion tank 74 together with f. Next, the stirrer elevating means 72 is conveyed to the vicinity of the immersion tank 74, and the second arm 72c is raised to a predetermined height together with the stirrer 73. When the elevating means 72 is further moved closer to the immersion tank 74 and the stirrer 73 is positioned above the immersion tank 74, and the second arm 72c is lowered, the blades 73a of the stirrer 73 are immersed in the electrolyte 13 in the immersion tank 74. Is done. In this state, ultrasonic vibration is applied to the living body 11f by the penetrating vibrator 32, and the electrolytic solution 13 is stirred by the stirrer 73. As a result, the electrolyte 13 quickly permeates the living body 11f,
Heavy metals contained in 1f become cations and are quickly eluted into the electrolyte solution 13, and oils and fats in the living body 11f
f and dispersed in the electrolyte 13.

The electrolytic solution 13 in which the heavy metals are eluted and the fats and oils are dispersed is not shown, but is sent to the fats and oils separation tank to separate the fats and oils, and then sent to the electrolysis tanks and electrolyzed as in the first embodiment. Heavy metal cations in the liquid precipitate on the cathode and are returned to the immersion tank 74. After a predetermined time has elapsed, the agitator 73 is pulled up from the immersion tank 74, and then the bucket 75 containing the living body 11f is pulled up. The bucket 75 is immersed in the washing tank together with the living body 11f to wash the living body in the bucket 75. . The apparatus according to this embodiment performs a process of removing heavy metals from the living body 11f and a degreasing treatment of the living body 11f with a small amount of the electrolyte 1.
3 and is suitable for treating a small amount of the living body 11f.

FIG. 8 shows a third embodiment of the present invention.
8, the same reference numerals as those in FIG. 4 indicate the same parts. In this embodiment, the anode 81 and the cathode 82 are formed in a round bar shape, and are arranged in the electrolytic cell 18 at predetermined intervals and alternately. For example, two rows of the anodes 81 are disposed vertically at predetermined intervals, and three rows of the cathodes 82 are disposed at predetermined intervals at four sides between and on both sides of the two rows of anodes 81. . The diameters of the anode 81 and the cathode 82 are preferably formed in the range of 20 to 45 mm. The anode 81 is connected to the plus terminal of the DC power supply 53, and the cathode 82 is connected to the minus terminal. The materials of the anode 81 and the cathode 82 are the same as those of the anode and the cathode of the first embodiment. Except for the above, the configuration is the same as that of the first embodiment. In the heavy metal removing apparatus configured as described above, in this embodiment, as compared with the first embodiment in which all the anodes and the cathodes must be taken out at the time of inspection and replacement of the anodes and the cathodes, in this embodiment, the anodes 81 are removed. And the cathode 82 can be taken out for each row, so that the anode 81 and the cathode 8 can be taken out.
2 can be easily inspected and replaced. Operations other than those described above are substantially the same as those in the first embodiment, and thus, repeated description will be omitted.

FIG. 9 shows a fourth embodiment of the present invention.
In this embodiment, the electrode cleaning vibrator 94 is attached to the lower surfaces of the plurality of cathodes 82 instead of the bottom of the electrolytic cell. Except for the above, the configuration is the same as that of the third embodiment. In the heavy metal removing apparatus configured as described above, even if fats and oils slightly dispersed in the electrolytic solution in the electrolytic cell adhere to the surface of the cathode 82 or hydrogen bubbles adhere to the surface of the cathode 82. Since the ultrasonic vibration is directly applied to the cathode 82 by the electrode cleaning vibrator 94, the bubbles of oils and fats are quickly separated from the cathode 82, and the surface of the cathode 82 is always kept in a clean state. As a result, a decrease in the current density flowing through the electrolytic solution can be prevented, so that the deposition efficiency of heavy metal cations on the cathode 82 does not decrease, and heavy metal cations can be efficiently deposited on the cathode 82.
In the case where fats and oils also adhere to the surface of the anode, the vibrator for electrode cleaning may be attached not only to the cathode but also to the lower surface of the anode. As a result, the surface of the anode can always be kept clean.

[0034]

As described above, according to the present invention, a living body or a living body containing heavy metals and fats and oils in the living body and an electrolyte solution that dissolves and ionizes the heavy metal are stored in the immersion tank.
A grease vibrator for applying ultrasonic vibration to the electrolyte is provided at the lower part of the grease separation tank, and grease discharging means discharges grease floating on the electrolyte surface of the grease separation tank. A predetermined voltage is applied between the cathodes to deposit cations of heavy metals eluted in the electrolyte on the cathode, and furthermore, the circulation means is configured to return the electrolyte in the electrolytic tank to the immersion tank. The heavy metals contained are eluted into the electrolyte in the immersion tank to become cations, and the fats and oils contained in the living body are dispersed in the electrolyte, and this electrolyte is sent to the fat and oil separation tank. Next, ultrasonic vibration is applied to the electrolyte in the oil / fat separation layer by the vibrator for oil / fat coagulation. Is done. Further, the electrolyte from which the fats and oils have been removed is sent to the electrolytic cell, and a predetermined voltage is applied between the anode and the cathode, whereby cations of heavy metals are precipitated on the cathode, and the cations from the electrolytic solution in the electrolytic cell are removed from the electrolyte. Is removed and returned to the immersion tank. As a result, the fat and oil hardly adhere to the cathode and the anode, the current density flowing through the electrolytic solution does not decrease, and the efficiency of depositing heavy metal cations from the electrolytic solution does not decrease.

If a penetrating vibrator for applying ultrasonic vibration to a living body or the like is provided at the bottom of the immersion tank, the electrolytic solution quickly penetrates the living body or living body by the ultrasonic vibration generated by the penetrating vibrator. Then, the heavy metals contained in the living body become cations and are quickly eluted into the electrolytic solution, and the fats and oils contained in the living body are separated from the living body or the like and dispersed in the electrolytic solution. As a result, the rate of elution of the heavy metal in the living body or the like into the electrolytic solution can be increased, and the living body or the like can be quickly degreased. In addition, if an electrode cleaning vibrator that applies ultrasonic vibration to the cathode is provided on the bottom of the electrolytic cell or on the lower surface of the cathode, the surface of the anode and the cathode or the cathode can always be kept clean, and the current flowing through the electrolytic solution can be maintained. Since the decrease in density can be prevented, the efficiency of depositing cations of heavy metals on the cathode does not decrease.

Further, the immersion tank is formed so as to extend along the direction of transporting the organisms, and the transport means transports the bucket containing the organisms in the transport direction of the organisms. By immersing the living organisms in the electrolytic solution in the immersion tank, it is possible to continuously and automatically perform the heavy metal removal processing from the living organisms and the degreasing treatment of the living organisms, so that a large amount of Suitable for treating living organisms. Further, if the bucket containing the organisms is inserted into the immersion tank by the bucket elevating means and pulled up, and the organisms in the bucket are immersed in the electrolyte in the immersion tank when the bucket is inserted into the immersion tank. In addition, the treatment for removing heavy metals from living organisms and the like and the degreasing treatment for living organisms and the like can be performed with a small amount of electrolytic solution, which is suitable for treating a small amount of living organisms and the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration diagram showing an apparatus for removing heavy metals contained in a living organism according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an anatomical view of a scallop containing a heavy metal in a living body.

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a configuration diagram showing a vibrator for oil / fat coagulation, a vibrator for permeation, and a vibrator for electrode cleaning, and an ultrasonic power supply for ultrasonically vibrating these vibrators.

FIG. 6 is a diagram showing a voltage applied between an anode and a cathode.

FIG. 7 is a sectional view illustrating a second embodiment of the present invention and corresponding to FIG. 2;

FIG. 8 is a sectional view illustrating a third embodiment of the present invention and corresponding to FIG. 4;

FIG. 9 is a front view of a main part of a cathode having an electrode cleaning vibrator adhered to a lower surface.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 Heavy metal removal device 11 Scallop (biological body) 11f Living body 12 Oil 13 Electrolyte 14, 74 Immersion tank 16 Oil separation tank 17 Oil discharge means 18 Electrolyte tank 25, 75 Bucket 26 Transport means 32 Oscillator 42 Oil and fat aggregation Oscillator 51, 81 Anode 52, 82 Cathode 53 DC power supply 54, 94 Electrode cleaning oscillator 56 Circulating means 71 Bucket elevating means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-47257 (JP, A) JP-A-48-94254 (JP, A) JP-A-7-8941 (JP, A) JP-A 62-94 38286 (JP, A) Japanese Utility Model Showa 57-51691 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/461 C02F 1/36 A23L 1/33

Claims (5)

(57) [Claims] An organism (11) containing a heavy metal and a fat or oil (12) in a living body (11f) or a sulfuric acid solution, a hydrochloric acid solution, and a sodium hydroxide solution that dissolve and ionize the living body (11f) and the heavy metal. Or an immersion tank (14, 74) in which an electrolyte (13) composed of a sodium chloride solution is stored, and the electrolyte (13) sent out from the immersion tank (14, 74) is stored and the organism ( 11) or a fat separating tank provided with a fat aggregating vibrator (42) for applying ultrasonic vibration to the electrolytic solution (13) containing the fat (12) detached and dispersed from the living body (11f) is provided at the bottom ( 16), and the fat (12) floated on the electrolyte (13) surface by the fat / oil aggregating vibrator (42) provided at the upper part of the fat / oil separation tank (16) is discharged from the fat / oil separation tank (16). And an electrolyte (13) sent out from the oil / fat separation tank (16), and the anodes (51, 81) and the cathodes (52, 82) are arranged at predetermined intervals. Established electrolysis A predetermined voltage is applied between the anode (51, 81) and the cathode (52, 82) which is electrically connected to the tank (14, 74) and the anode (51, 81) and the cathode (52, 82). A direct current power source (53) for depositing cations of heavy metals eluted in the electrolyte solution (13) on the cathodes (52, 82), and the electrolyte solution (13) in the immersion tank (14, 74). Oil separation tank (16)
Circulating means (56) which sends out the electrolytic solution (13) of the electrolytic cell (18) to the immersion tank (14, 74) by sending it to the electrolytic cell (18) through Removal equipment. 2. The living organism according to claim 1, further comprising an osmotic vibrator for applying ultrasonic vibration to the living organism (11) or the living organism (11f) at the bottom of the immersion tank (14, 74). Heavy metal removal equipment included. 3. An electrode cleaning vibrator (54, 94) for applying ultrasonic vibration to said cathode (52, 82) is provided on the bottom of the electrolytic cell (18) or on the lower surface of the cathode (82). Or an apparatus for removing heavy metals contained in a living organism according to 2. 4. The immersion tank (14) is a living body (11) or a living body (11f).
The living body (11) or the living body (11f) is formed so as to extend along the transport direction of the plurality of buckets (2
5), the plurality of buckets (25) are transported at predetermined intervals by transport means (26) along the transport direction of the living organism (11) or the living organism (11f), When transporting the bucket (25), the plurality of buckets
The organism (11) or the organism (11f) in (25) is included in the organism according to any one of claims 1 to 3, wherein the organism (11f) is configured to be immersed in the electrolytic solution (13) of the immersion tank (14). Heavy metal removal equipment. 5. An organism or living organism (11f) is stored in a bucket (75), and the bucket (75) is immersed in a dipping tank by bucket elevating means (71).
When the bucket (75) is inserted into the immersion tank (74), the organism or living body (11f) in the bucket (75) is inserted into the immersion tank (74) when the bucket (75) is inserted into the immersion tank (74).
The apparatus for removing heavy metals contained in living organisms according to any one of claims 1 to 3, wherein the apparatus is configured to be immersed in the electrolytic solution (13).