JP2002250792A - Radioactive waste liquid processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processor with high removal performance of impurity, superior operation performance which can reduce operation cost and the generation amount of secondary waste. SOLUTION: A plurality of pairs of anodes 2 and cathodes 3 are placed face to face like a comb in an electrolysis tank 1 and an electrolysis coagulator/ separator 5 is constituted by connecting the anodes 2 and the cathodes 3 to a direct current source 4. A filter 6 is directly connected to the downstream of the electrolysis coagulator/separator 5. The anodes 2 and the cathodes 3 consist of electrode plates of aluminum as main material and the hole diameters of the filter 6 material are 0.45 μm. If electrolysis is applied to the washing waste liquid 7 put in the electrolysis tank 1, the suspension component in the washing waste liquid 7 is coagulated by generating aluminum ion. If hydrogen gas bubbles generated from the cathodes attach the coagulated suspension, it floats on the water surface, which is filtered with the filter 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radioactive waste liquid treatment apparatus for treating a waste liquid such as a laundry waste liquid generated by washing work clothes and the like worn in a radiation control area.

[0002]

2. Description of the Related Art Radioactive liquid waste generated in a nuclear power plant, washing liquid discharged from washing work clothes worn in a radiation control area, shower drain, etc. contain a large amount of organic impurities such as dirt components and detergents. , Chemical oxygen demand (CO
D; Chemical Oxygen Demand), suspended matter (SS; Susp)
end Solid) High concentration of normal hexane extract.

In order to release radioactive waste liquid and laundry waste liquid to the environment, it is necessary to remove these organic impurities. To reduce radioactivity released into the environment, it is necessary to remove radioactive substances in the waste liquid. is necessary.

[0004] As a method of treating these radioactive waste liquid and laundry waste liquid, a filtration method, a reverse osmosis membrane method, an evaporation concentration method, an activated carbon adsorption method and the like are known. Here, the filtration method and the reverse osmosis membrane method are methods in which impurities in the waste liquid are removed by filtration to obtain treated water. The evaporative concentration method is a method in which waste liquid is heated and evaporated to condense impurities in the waste liquid to obtain treated water as distilled water. The activated carbon adsorption method is a method in which impurities in a waste liquid are adsorbed and removed by activated carbon, and treated water is obtained by removing the activated carbon.

[0005]

However, in the filtration method,
Low filtration and high adhesiveness of impurities contained in washing waste liquid, shower drain, etc.
There is a problem that the backwashing property deteriorates. In the reverse osmosis membrane method, there is a problem that filtration resistance is large and the size of the apparatus is increased, and contamination is blocked by impurities in the membrane.

[0006] In the evaporative concentration method, since foaming occurs due to the effect of detergent components contained in laundry waste liquid, shower drain, and the like, it is necessary to add a foam inhibitor or use a special detergent with suppressed foaming properties. However, the evaporative concentration method has a problem that a large amount of steam is consumed as a heating source.

In the activated carbon adsorption method, there is a problem that a large amount of activated carbon is consumed for the treatment of adsorbing impurities contained in washing waste liquid, shower drain and the like, and this used activated carbon is generated as secondary waste.

The present invention has been made to solve these problems of the prior art, and is excellent in operation performance, can reduce operation cost, can reduce the amount of secondary waste generated, and can improve the capability of removing impurities. An object of the present invention is to provide a high radioactive liquid waste treatment apparatus.

[0009]

Means for Solving the Problems According to claim 1 of the present invention,
An electrolytic coagulation / separation device in which both an anode and a cathode, or a cathode is made of a material whose main component is aluminum in an electrolytic cell, and a filtration device provided downstream of the electrolytic coagulation / separation device. It is characterized by having.

According to the first aspect of the present invention, a coagulation / separation treatment device mainly comprising an electrolytic cell and a filtration treatment device are combined in series, and both the anode and the cathode or the main component of the cathode is aluminum in the electrolytic bath. By incorporating a material electrode and electrolyzing the waste liquid, aluminum ions generated from the anode or cathode can accelerate the aggregation of the suspended components in the waste liquid. it can. This makes it possible to reduce the size and cost of the electrolytic coagulation separation device.

[0011] The hydrogen gas bubbles generated from the cathode adhere to the aggregates of the suspended components and float on the water surface to be separated and removed. Next, the impurities remaining in the electrolytic treatment are removed by filtration by a filtration treatment device.

A large amount of organic impurities contained in washing waste liquid, shower drain, etc. are highly purified by the two-stage treatment of the electrolytic coagulation separation device and the filtration treatment device, and the concentration of COD, suspended solids, and normal hexane extract are reduced. In addition, radioactive substances in the waste liquid can be removed. Since the main impurities in the waste liquid are coagulated and separated by the electrolytic coagulation / separation treatment, it is possible to avoid a rapid increase in the filtration pressure difference in the filtration treatment and deterioration of the backwashing property. In addition, normal temperature treatment is possible, and heating means such as steam is not required. Further, since the additive is only the aluminum component generated by electrolysis, the amount of secondary waste generated can be reduced as compared with the activated carbon adsorption method.

In addition, it is possible to increase the tolerance for fluctuations such as impurity concentration and impurity properties. Further, by periodically switching the polarity of the anode and the cathode, both electrodes can be used efficiently, so that the frequency of electrode replacement can be halved.

According to a second aspect of the present invention, there is provided an electrolytic coagulation / separation apparatus in which both an anode and a cathode or an electrode made of a material whose main component is aluminum is provided in an electrolytic cell. It is characterized by comprising a neutralization treatment device installed on the downstream side and a filtration treatment device installed on the downstream side of the neutralization treatment device.

According to a second aspect of the present invention, first, in an electrolytic coagulation / separation apparatus using an electrode whose main component is aluminum for both the anode and the cathode, aluminum ions generated from the anode by electrolyzing washing waste liquid This causes the suspended components in the waste liquid to aggregate. Similarly, aluminum ions are generated from the cathode, and the suspended components in the waste liquid are further accelerated and aggregated.

Hydrogen gas bubbles generated from the cathode adhere to the aggregates of these suspended components, so that they float on the water surface and are separated and removed. Next, in the neutralization treatment device, the electrolyzed solution is neutralized to neutralize the waste liquid and simultaneously coagulate the aluminum ions dissolved in the water with the suspended components in the waste liquid. Finally, impurities remaining in the electrolytic treatment are removed by filtration using a filtration treatment device.

According to the second aspect of the present invention, aluminum ions which are not completely agglomerated with the suspended components in the electrolytic separation device and remain dissolved in the electrolyzed water can be effectively used. Aggregation of the suspended components in the waste liquid can be further accelerated as compared with the invention of (1).

According to a third aspect of the present invention, there is provided an electrolytic coagulation / separation apparatus in which both an anode and a cathode or an electrode made of a material whose main component is aluminum is provided in an electrolytic cell. It is characterized by comprising a filtration treatment device installed on the downstream side, and a neutralization treatment device installed on the downstream side of the filtration treatment device.

In the invention according to claim 3, first,
In an electrolytic coagulation / separation apparatus using an electrode whose main component is aluminum for both the anode and the cathode, suspended components in the waste liquid are aggregated by aluminum ions generated from the anode by electrolyzing the washing waste liquid.

Similarly, aluminum ions are generated from the cathode, and the suspended components in the waste liquid are further accelerated and aggregated. Hydrogen gas bubbles generated from the cathode adhere to the aggregates of these suspended components, so that they float on the water surface and are separated and removed.

Next, impurities remaining in the electrolytic treatment are removed by filtration using a filtration device. Finally, in the neutralization device,
Neutralize the electrolyzed solution. According to the third aspect of the present invention, it is possible to avoid a pH change due to the filtration treatment, and therefore, an effect equal to or higher than that of the second aspect of the invention can be obtained.

According to a fourth aspect of the present invention, at least two stages of the electrolytic coagulation / separation device are connected in series, a power source is provided for each stage of the electrolytic coagulation / separation device, and a current or current is supplied to each stage of the electrolytic coagulation / separation device. It is characterized in that the voltage is set.

In the invention according to claim 4, two or more stages of electrolytic coagulation / separation devices are connected in series to allow water to flow.
Even if there is water to be treated for which the agglutination reaction is not sufficient, it is possible to cope with the case. When this electrolytic coagulation / separation apparatus is provided in two or more stages, it is possible to easily cope with an increase in only the voltage of the preceding electrocoagulation / separation apparatus for some reason, for example, by using separate power supplies. Although electrolysis current amount can be operated as desired by the quality of the treated water, in a typical laundry effluent ^{30A / m 3 / h~300A / m} 3 / h is desired, generally 250A / m ³
If it is about / h, sufficient treated water quality can be obtained.

The invention according to claim 5 is characterized in that the filtration treatment device comprises a hollow fiber membrane filter, a ceramic filter or a metal filter mainly composed of polyethylene, polypropylene, polysulfone or polytetrafluoroethylene. .

When a hollow fiber membrane filter containing polyethylene, polypropylene or polysulfone as a main component is applied, the filter itself is an organic substance, so that the volume can be greatly reduced by incineration at the time of disposal. The cost is very low and compact.

Also, polytetrafluoroethylene (PTFE)
When a hollow fiber membrane filter whose main component is is applied,
In this case, since the organic substances are not easily attached, the increase in the filtration differential pressure can be suppressed, and even if the filtration differential pressure increases, sufficient chemical washing can be performed, so the frequency of replacement of the hollow fiber membrane filter itself is extremely low. Good.

In addition to these hollow fiber membrane filters, ceramic filters and metal filters may be used. The pore size of the filter medium of these filtration devices is preferably 0.45 μm or less, because the particle size of the suspended component is generally 0.45 μm or more in many cases.

The agglomerate slurry separated by the electrolytic aggregating and separating apparatus and the impurities separated by the filtering apparatus can be easily removed by polyethylene, polypropylene, polysulfone, PTFE, ceramic or metallic filter material. The volume of waste can be significantly reduced. This is because in the case of the aggregate slurry, a plurality of suspensions and aluminum ions are combined to form large particles.

The impurities of the filtration device are compressed on the surface of the filter material and are combined with each other to form large particles. The particle size of the coagulated slurry of the electrolytic coagulation / separation device and the impurities of the filtration device are as follows. Because it is about 5μm or more,
It is desirable that the pore size of the filtration material in the filtration treatment is 5 μm or less.

Therefore, if the coagulated slurry and the impurities in the filtration treatment device are treated by a filtration treatment device having a pore size of 5 μm or less, for example, treated water having a higher quality than ordinary washing waste liquid can be obtained. There is no problem with mixing and reprocessing.

[0031] The invention according to claim 6 is characterized in that the neutralization treatment device is provided with an air diffuser for passing air, carbon dioxide or ozone gas through the liquid. According to the present invention, the alkaline atmosphere of the electrolyzed solution introduced into the neutralization apparatus can be neutralized by passing air, carbon dioxide or ozone gas. In addition, by applying such a ventilation method as the neutralization in the neutralization treatment device, a treatment that does not particularly require a neutralizing agent can be performed.

[0032] The invention according to claim 7 is characterized in that a filtration device for subjecting the slurry separated from the electrolytic coagulation / separation device and the filtration treatment device to individual treatment or mixing and secondary treatment is provided.

According to the present invention, the amount of secondary waste generated can be further reduced by further filtering the slurry separated from the electrolytic coagulation / separation apparatus or the filtration apparatus.

The invention according to claim 8 is characterized in that a concentrating device or a drying device for concentrating or drying the slurry is provided in place of the filtering device.
According to the present invention, by performing a process of drying or concentrating the slurry separated from the electrolytic coagulation / separation device or the filtration treatment device stably and to a sufficient extent, water in the slurry is removed, thereby reducing the secondary waste. The amount of generation can be further reduced.

According to a ninth aspect of the present invention, there is provided an incineration or melting treatment apparatus for incinerating or melting the concentrated waste liquid or dried product treated in the concentration apparatus or the drying apparatus.

According to the present invention, the amount of secondary waste can be further reduced by drying or concentrating the slurry stably and to a sufficient extent and then incinerating or melting the slurry.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of a radioactive liquid waste treatment apparatus according to the present invention will be described with reference to FIG. In the present embodiment, as shown in FIG. 1, an anode 2 and a cathode 3 made of a material containing aluminum as a main component are installed in a first electrolytic cell 1 and a second electrolytic cell 1a, respectively. And a first and a second electrolytic coagulation / separation devices 5 and 5a each having a cathode 3 connected to a DC power supply 4;
And a filtration treatment device 6 installed downstream of the electrolytic coagulation / separation device 5a.

The filtration device 6 is composed of a hollow fiber membrane filter containing polyethylene, polypropylene, polysulfone or polytetrafluoroethylene as a main component.
In the first embodiment, as shown in FIG.
Is first passed through the first electrolytic cell 1, then the treated water is passed through the second electrolytic tank 1 a and then through the filtration treatment device 6 to become treated water 8, and the throughput as the radioactive waste liquid treatment device Is set to 0.02 m ³ / h.

In the first and second electrolytic cells 1 and 1a, four pairs of an anode 2 and a cathode 3 which are made of aluminum as a main component are opposed to each other. 7 pass water sequentially. A current of 250 A / m ³ / h is applied to these electrodes 2 and ³ to reverse the polarity of the electrodes at intervals of 30 minutes.

An automatic scraping device 9 is provided near the water surface of each of the first and second electrolytic cells 1 and 1a. The automatic scraping device 9 scrapes the foam sludge floating on the water surface at regular intervals. And the first and second electrolytic cells 1, 1a
Is dropped into boxes (not shown) installed on the left and right sides of the box. Power supplies for the first and second electrolytic cells 1 and 1a are separately prepared, and are controlled with the same current. A filtration device 6 is provided with a hollow fiber membrane having a pore diameter of 0.1 μm and made of polyethylene as a main component.

In the first embodiment, when the laundry waste liquid 7 having a COD concentration of 87 ppm and an insoluble component concentration of 12 ppm was treated, the COD concentration was 12 ppm and the insoluble component concentration was 1 ppm.
Less than 8 treated water 8 was obtained.

According to the present embodiment, the first and second electrolytic coagulation / separation devices 5, 5a promote the condensation of the suspended components in the waste liquid by the aluminum ions generated from the anode 2 or the cathode 3. Since the filtration treatment in the filtration treatment device 6 can be performed reliably and stably, a system with a large effect of reducing the amount of secondary waste generated with a small-sized device can be realized.

In the present embodiment, the washing waste liquid 7 has been described as an object to be treated. However, it goes without saying that the object is not limited as long as it is a radioactive waste liquid generated in a nuclear power plant or the like.

In the present embodiment, it is also possible to adopt a configuration in which only the cathode as the electrode for generating aluminum ions is made of a material containing aluminum as a main component. With this configuration, the same operation as described above can be obtained.

Further, as the filtration device 6, a ceramic filter or a metal filter may be used instead of the hollow fiber membrane filter. In this case, in consideration of the particle size of the suspended component, it is preferable to use a filter medium having a pore diameter of, for example, about 0.45 μm or less.

(Second Embodiment) A second embodiment of the radioactive liquid waste treatment apparatus according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. This embodiment differs from the first embodiment in that a neutralization treatment device 10 is provided between the second electrolytic coagulation / separation device 5a and the filtration treatment device 6.

In the second embodiment, as shown in FIG. 2, the washing waste liquid 7 is first passed through the first electrolytic cell 1 to be treated, and then the treated water is supplied to the second electrolytic cell 1a, Then, the water is neutralized by flowing through the neutralization treatment device 10, and what has passed through the filtration treatment device 6 becomes the final treated water 8. The processing amount of this radioactive liquid waste treatment apparatus is set to 0.02 m ³ / h.

The first and second electrolyzers 1 and 1a are arranged in pairs of an anode 2 and a cathode 3 made of aluminum as a main component, and a washing waste liquid 7 sequentially flows between the respective electrodes. A current of 250 A / m ³ / h is applied to these to reverse the polarity of the electrodes at 30 minute intervals. Electrolyzer 1,1a
Is dropped into boxes (not shown) installed on the left and right sides of the box. The power supplies for the electrolytic cells 1 and 1a are separately prepared, and are controlled with the same current.

Air is bubbled through the air diffuser 11 at a flow rate of about 0.02 Nm ³ / min into the neutralization treatment device 10. The height of the electrolyzed water 12 is 20 to 30 cm, and the residence time is 20 to 30 min. I have. A filtration device 6 is provided with a hollow fiber membrane having a pore diameter of 0.1 μm and made of polyethylene as a main component.

In this embodiment, when the laundry waste liquid 7 having a COD concentration of 90 ppm on average and an insoluble component concentration of 15 ppm on average is treated, the treated water 8 having an average COD concentration of 9.5 ppm or less and an insoluble component concentration of less than 1 ppm is treated. was gotten. The pH of the treated water was 8.1 on average.

FIG. 3 shows an electrolytic coagulation / separation device using, for example, stainless steel as an electrode whose main component is aluminum for the anode 2 and an electrode whose main component is iron for the cathode 3, and a main component for both the anode and the cathode. It is a figure explaining the effect by the electrolytic coagulation separation device which incorporated the electrode made from aluminum.

An aluminum-aluminum electrode is used as a cathode /
When the anode switching operation is performed, the COD removal performance, in this case, the COD decontamination coefficient (DF) = concentration of waste liquid COD / concentration of treated water COD, is equal to aluminum-
It was recognized that the improvement was more than twice as compared with the stainless steel electrode.

Table 1 is a table showing the results of treating the laundry waste liquid containing a radioactive substance in the same radioactive waste liquid treatment apparatus as in the second embodiment. The test conditions are the same as those in the second embodiment.

[0054]

[Table 1]

In this embodiment, the concentration of insoluble cobalt-60 is 8.9 × 10 ^-2 Bq / cm ³ and the concentration of manganese-54 is 3.5
When the washing waste liquid 7 of × 10 ^-2 Bq / cm ³ was treated, the concentration of cobalt-60 was 4.2 × 10 ^-4 Bq / cm ³ or less, and the concentration of manganese -54 was 3.2 × 10 ^-4 Bq / cm ³ or less. The treated water 8 was obtained. From this, 100 or more were obtained as the radioactivity decontamination coefficient (DF) = waste liquid radioactivity concentration / treated water radioactivity concentration.

According to this embodiment, the same operation and effect as those of the first embodiment can be obtained, and further, a neutralization treatment is performed by using aluminum ions remaining in the liquid treated by the electrolytic coagulation / separation apparatus. Since the suspended components can be aggregated in the device 10, the amount of secondary waste generated can be further reduced.

Further, instead of performing bubbling with air in the neutralization treatment device 10 by the air diffuser 11 in the present embodiment, bubbling may be performed by passing carbon dioxide or ozone gas. Also in this case, the action of neutralizing the alkaline solution in the neutralization treatment device 10 can be realized by bubbling.

In the present embodiment, the washing waste liquid 7 subjected to the action of electrolytic coagulation and separation is first neutralized by the neutralization treatment device 10 and then passed through the filtration treatment device 6 to be filtered. However, a series of treatments in which the neutralization treatment and the filtration treatment are reversed can also be performed. That is, in this case, the washing waste liquid 7
Is first passed through the first electrolytic cell 1 and then passed through the second electrolytic cell 1a, then the filtration device 6 and then the neutralization device 10 for treatment. With this configuration, it is possible to obtain substantially the same operation and effect as those of the above-described embodiment.

(Third Embodiment) In the third embodiment, as a secondary treatment, a mixed slurry of foam sludge and hollow fiber backwash water generated in the second embodiment is used as a main component. Was filtered with a filter having a pore size of 5 μm.

According to this embodiment, the COD concentration is 205 p.
pm, when the sludge water with the insoluble component concentration of 75600ppm was treated, the COD concentration was 32ppm and the insoluble component concentration was 92p
pm of treated water was obtained. According to the present embodiment, it is possible to reduce the final generation amount of secondary waste.

In the present embodiment, the filtration treatment as the secondary treatment can be realized by a hollow fiber membrane filter made of another component or a ceramic or metal filter. Alternatively, the filtered liquid that has been subjected to the filtration treatment as the secondary treatment is used alone or mixed with the washing waste liquid 7 before the treatment, and the series of treatments according to the above-described first or second embodiment is performed to perform the re-treatment. It can also be.

(Fourth Embodiment) In the fourth embodiment, as a secondary treatment, a mixed slurry of the foamed sludge and the backwash water of the hollow fiber membrane generated in the second embodiment is rotated. Drying was performed with a dry dryer. According to this embodiment, the mixed slurry can be dried stably, and a good dry powder having a water content of less than 5 wt% was obtained. According to the present embodiment, a suitable dehydration treatment can be realized, and thus the final amount of secondary waste generated can be reduced.

In this embodiment, instead of the configuration in which the sludge is powdered by the drying process, a configuration in which the sludge is concentrated may be employed. With this, the same operation and effect can be obtained.

Further, in the present embodiment, a configuration may be adopted in which the dried body subjected to the drying treatment or the concentrated waste liquid subjected to the concentration treatment is incinerated or melted. As a result, the final amount of secondary waste generated can be further reduced.

In the third embodiment and the fourth embodiment, instead of the constitution in which the slurry generated in the electrolytic cell and the filtration treatment device is mixed and subjected to the secondary treatment by filtration,
It is also possible to adopt a configuration in which the slurry generated in the electrolytic cell and the filtration device is subjected to secondary treatment individually. With this, the same operation and effect as described above can be obtained.

[0066]

According to the present invention, the driving performance is excellent, the operating cost can be reduced, and the amount of secondary waste generated can be reduced. Also,
The ability to remove impurities in the electrolytic aggregation separation process can be increased.

[Brief description of the drawings]

FIG. 1 is an apparatus layout diagram showing a first embodiment of a radioactive liquid waste treatment apparatus according to the present invention.

FIG. 2 is an apparatus layout diagram showing a second embodiment of the radioactive liquid waste treatment apparatus according to the present invention.

FIG. 3 is a diagram for explaining the COD decontamination effect of the radioactive liquid waste treatment apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st electrolytic cell, 1a ... 2nd electrolytic cell, 2 ... anode, 3
... a cathode, 4 ... a DC power supply, 5 ... a first electrolytic coagulation separation device,
5a: second electrolytic coagulation / separation device, 6: filtration device, 7
... Washing waste liquid, 8 ... Treatment water, 9 ... Automatic scraping device, 10 ...
Neutralization treatment device, 11: diffuser tube, 12: electrolyzed water.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 71/36 B01D 71/36 71/68 71/68 C02F 1/04 C02F 1/04 E 1/44 1 / 44 K 1/463 G21F 9/14 D 1/465 9/28 525G G21F 9/14 C02F 1/46 102 9/28 525 (72) Inventor Kenji Fujihata 2-1, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kawasaki, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Shuji Seki 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Manabu Sakurai No. 2, Ukishima-cho, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture No. 1 Inside Toshiba Hamakawasaki Plant (72) Inventor Masaru Komatsubara 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Inside Toshiba Yokohama Office (72) Inventor Hiroshi Igarashi Suruga, Kanda, Chiyoda-ku, Tokyo 2-2-2 Daidai Electric Power Business Co., Ltd. (72) Ryozo Yoshikawa 2-chome, Kanda Surugadai, Chiyoda-ku, Tokyo 2-72 Electric Power Business Co., Ltd. (72) Hironori Mizutani 2-chome, Kanda Surugadai, Chiyoda-ku, Tokyo F-term (Reference) in Hara Electric Business Co., Ltd. 4D006 GA02 GA03 HA01 KB13 KB30 MA01 MA21 MC02 MC03 MC23 MC30 MC62 PA02 PB08 PC33 4D034 AA24 BA01 CA12 4D061 DA08 DB09 DB15 DC06 EA02 EB02 EB05 EB14 EB20 EB27 EB28

Claims (9)

[Claims] 1. An electrolytic coagulation / separation device comprising an anode and a cathode, or an electrode made of a material whose main component is aluminum, in an electrolytic cell and a downstream side of the electrolytic coagulation / separation device. A radioactive liquid waste treatment device comprising a filtration treatment device. 2. An electrolytic coagulation / separation apparatus in which both electrodes of an anode and a cathode or a cathode is made of a material containing aluminum as a main component are installed in an electrolytic cell, and installed downstream of the electrolytic coagulation / separation apparatus. A radioactive liquid waste treatment device comprising: a neutralization treatment device; and a filtration treatment device provided downstream of the neutralization treatment device. 3. An electrolytic coagulation / separation device in which both electrodes of an anode and a cathode or a cathode is made of a material whose main component is aluminum is provided in an electrolytic cell, and is provided downstream of the electrolytic coagulation / separation device. A radioactive waste liquid treatment device comprising: a filtration treatment device; and a neutralization treatment device provided downstream of the filtration treatment device. 4. The method according to claim 1, wherein at least two stages of the electrolytic coagulation / separation device are connected in series, a power source is provided for each stage of the electrolytic coagulation / separation device, and a current or voltage is set for each stage of the electrolytic coagulation / separation device. The radioactive waste liquid treatment apparatus according to claim 1, wherein: 5. The filter according to claim 1, wherein the filtration device comprises a hollow fiber membrane filter, a ceramic filter or a metal filter containing polyethylene, polypropylene, polysulfone or polytetrafluoroethylene as a main component. Radioactive liquid waste treatment equipment. 6. The radioactive waste liquid treatment apparatus according to claim 2, wherein the neutralization treatment apparatus is provided with an air diffuser for passing air, carbon dioxide, or ozone gas through the liquid. 7. The radioactive waste liquid treatment according to claim 1, further comprising a filtration device for subjecting the slurry separated from the electrolytic coagulation separation device and the filtration treatment device to individual treatment or mixing and secondary treatment. apparatus. 8. The radioactive waste liquid treatment apparatus according to claim 1, further comprising a concentration apparatus or a drying apparatus for concentrating or drying the slurry instead of the filtration apparatus. 9. The radioactive waste liquid treatment device according to claim 1, further comprising an incineration or melting treatment device for incinerating or melting the concentrated waste liquid or dried product treated by the concentration device or the drying device. .