JP2018522225A - Radioactive contaminated water purification system and method using microalgae - Google Patents

Abstract

The present invention provides a radioactive contamination water purification system and method using microalgae.
The purification system according to the present invention comprises radioactively contaminated water and microalgae that grow in the radioactively contaminated water, a culture tank having a sealed internal space, A culture medium made of a flexible material to which microalgae can be attached, and the culture medium is placed outside the culture tank in order to put the culture medium into a sealed internal space of the culture tank or to harvest microalgae that have collected radionuclides. A culture medium transfer device to be taken out, a measurement unit for acquiring various information in the culture tank, a local control unit for controlling operations of various devices provided in the culture tank by a remotely received control signal, and the measurement A remote control system for transmitting a control signal to the local control unit using information received from the unit.
[Selection] Figure 1

Description

  Regarding the treatment of spent nuclear fuel at nuclear power plants and the purification of radioactive water, more specifically, it is possible to stably treat spent nuclear fuel at nuclear power plants using microalgae or The present invention relates to a method for purifying radioactively contaminated water by removing radioactive substances in water.

  In general, nuclear power plants use fission to produce economical, low-carbon clean energy. By the way, the radioactivity and radioactive materials generated in the process of fission are not only fatal to the residents and workers when exposed to atomic bombs, but also have a disadvantage that the residual period is extremely long when leaked into the surrounding environment. During the normal operation of a nuclear power plant, there are no radiation leakage problems because various radiation shielding and protective measures are in place to prevent the leakage of radiation.

  However, leakage of radioactive materials to the surrounding environment and the resulting contamination of the land, ocean, groundwater, etc. due to spent nuclear fuel at the nuclear power plant and / or in the event of a major accident at the nuclear power plant due to a natural disaster Radiation exposure of residents and workers is a big problem.

  Therefore, there is a need for technology development that can stably and environmentally treat spent nuclear fuel in nuclear power plants and radioactive materials and / or radioactively contaminated water caused by serious accidents.

  Normally, nuclear power plants set up defense-in-depth and multi-defense barriers as safety principles in order to minimize the storage of various radioactive material nuclides that occur during nuclear fission and radiation exposure to radioactive materials. It is applied to design, manufacturing, operation and accident management. Nuclei of various radioactive materials generated during nuclear fission during the normal operation of nuclear power plants are present in the nuclear fuel rod cladding. During normal operation, radiation from radioactive materials is shielded below the radiation safety dose standard by multiple barriers such as nuclear fuel rod coverings, reactor vessels and reactor buildings.

  Tables 1 and 2 show the radionuclides of 60 main radioactive materials that cause damage to human bodies among the radioactive materials generated by nuclear fission in nuclear power plants, and their half-lives in date units and year units.

  As can be seen from the table above, most of the radioactive material in the nuclear fuel rods of spent nuclear fuel has a short half-life, but several radioactive materials have a very long half-life. The preparation for is demanded.

  In fact, in the case of an accident at the US TMI-2 nuclear power plant that occurred in 1979, the nuclear fuel melted and the nuclear fuel melt was relocated to the lower hemisphere of the reactor vessel. Could be stored in a reactor vessel, which is a multiple defense wall. Therefore, radioactive materials were not released outside the reactor vessel, and radiation was kept below the safety standard value outside the reactor building.

  However, in the case of a serious accident at a nuclear power plant where the reactor vessel is damaged due to, for example, an explosion accident or a natural disaster such as a tsunami or earthquake, the nuclear fuel melt is released into the space below the reactor vessel Sometimes. Then, a large amount of heat is generated by the molten nuclear fuel released, but if it is not properly cooled, the reactor building may be damaged by phenomena such as pressure and hydrogen explosion.

  Thus, when the reactor vessel and reactor building are damaged, radioactive materials and radiation can be released to the atmosphere and the environment, causing environmental pollution and radiation exposure to local residents and workers. In fact, the accidents of the Chernobyl nuclear power plant in the former Soviet Union in 1986 and the accidents of the nuclear power plants in Fukushima, Japan in 2011 can be said to be representative examples.

  In the case of the Chernobyl nuclear power plant accident, radioactive material was fixed in the reactor building using sand after the accident, but there was air pollution caused by atmospheric release of radioactive material and soil contamination, and radiation damage to local residents occurred. . The accident at the nuclear power plant in Fukushima resulted in air pollution, marine pollution due to groundwater pollution, environmental pollution due to soil pollution, and local radiation damage.

  In particular, in the case of an accident at a nuclear power plant in Fukushima, the treatment of radioactively contaminated water from groundwater and contaminated water from nuclear reactor buildings has been discussed as the most important environmental pollution treatment issue. There is an urgent need for environmentally friendly and stable treatment.

  In Tables 1 and 2, the most urgent radioactive materials to be treated in the accident at the nuclear power plant in Fukushima are Iodine I-131 (half life is about 2 days), Cesium CS-134 (half life) Is approximately 2 years) and CS-137 (half-life is approximately 30 years), Strontium SR-90 (half-life is approximately 28 years), Tellurium TE-127 (half-life is approximately 0.39 days) ), Krypton KR-85 (half-life is about 10 years), and the like.

  In the case of accident handling at a nuclear power plant in Fukushima, it is temporarily implemented because there is no current technology for treating radioactive materials and radioactively contaminated water. For example, measures are taken to temporarily store groundwater contaminated with radioactivity or contaminated water in a reactor building using a pump and temporarily store it in a storage tank.

  On the other hand, there is a plan to freeze the middle part of the groundwater flow to prevent inflow and / or outflow of groundwater by the ice layer. In the case of a contaminated water storage tank, the piping and valves attached to the installed storage tank cannot withstand the pressure caused by the heat generated continuously in the contaminated water, and the contaminated water leaks to the external environment due to damage. In addition, the radiation exposure of workers is increasing rapidly. On the other hand, a frozen soil impervious wall that freezes the land around the nuclear power plant in order to block the groundwater from flowing into the reactor building is an unverified technology that reduces the temperature of a certain part of the soil below the zero point. Enormous financial investment is required to maintain this, but this is not a technology for treating radioactive contaminated water, but only a temporary technology for blocking underground contaminated water.

  The present invention solves the above-mentioned problems of the prior art and adds various different advantages, especially in the event of a serious accident at a nuclear power plant that occurs with spent nuclear fuel, or an accident at a nuclear power plant in Fukushima. The objective is to provide radioactively contaminated water treatment technology using microalgae that can stably and efficiently treat radioactively contaminated water contaminated with radioactive materials that minimize the radiation exposure of workers. is there.

  The present invention also cultivates microalgae in a culture tank that can store sealed radioactive water for providing an optimal culture environment, and remotely and automatically controls the culture environment in the culture tank remotely. The purpose of the present invention is to provide a technology for purifying radioactive contaminated water using microalgae that minimizes the radiation exposure of workers on site.

  Furthermore, the present invention cultivates only one kind of microalgae in one culture tank, and connects a plurality of such culture tanks in series, thereby efficiently treating various kinds of radioactive substances in radioactively contaminated water. The purpose is to provide a technology for purifying radioactively contaminated water using microalgae that can be removed well.

  Furthermore, the present invention provides a case where the radioactive water is contaminated with cooling water for cooling spent nuclear fuel, radioactively contaminated water that leaks in the event of an accident at an operating nuclear power plant, and underground water flowing under the nuclear power plant. To provide a technology for purifying radioactive polluted water using microalgae, which can remotely and automatically purify radioactive polluted water generated in large quantities in a stepwise and continuous manner. There is a purpose.

  Furthermore, the present invention uses microalgae by cultivating microalgae by separating nuclear material in nuclear fuel rods of spent nuclear fuel from the nuclear fuel rods and receiving them in the water of a storage tank sealed in a powder form. It is an object of the present invention to provide a technique for stably treating the radioactive nuclear material of spent nuclear fuel using the radioactive contamination water purification technique.

  In order to achieve the above-described object, one embodiment of the present invention is one in which radioactively contaminated water and microalgae that grow in the radioactively contaminated water are input, and has a sealed internal space, A culture tank to which the input pipe, the microalgae input pipe, and the purified water discharge pipe are connected, the culture medium made of a flexible material to which the microalgae are attached, and the culture medium are introduced into the sealed internal space of the culture tank. A culture medium transfer device that is taken out of the culture tank in order to harvest microalgae that have collected radionuclides, a measurement unit that acquires various types of information in the culture tank, and a control signal received remotely A local control unit that controls operations of the contaminated water input pipe, microalgae input pipe, purified water discharge pipe, and culture medium transfer device, and control to the local control unit using information received from the measurement unit Providing radioactive contaminated water purification system using a microalgae comprising a remote control system for transmitting items.

  In the radioactively contaminated water purification system according to one aspect of the present invention, the culture medium transfer device includes a first control line and a second control line connected to one end and the other end of the culture medium, and the first control. A first roller and a second roller around which a line and the second control line are respectively wound, and a driving means for rotating the first roller and the second roller.

  Further, in the radioactively contaminated water purification system according to one aspect of the present invention, the culture tank includes a plurality of culture tanks connected in series to each other, and different types of microalgae are charged into the plurality of culture tanks. Can be done.

  Further, in the radioactively contaminated water purification system according to one aspect of the present invention, the culture tank is provided with a safety valve that is opened when the pressure in the internal space is equal to or higher than a set value, and is closed when the pressure is less than the set value. obtain.

In the radioactively contaminated water purification system according to one aspect of the present invention, the culture tank includes a temperature regulator for adjusting the temperature of the internal space, and a nutrient capable of growing microalgae in the contaminated water of the internal space. An additive charging pipe for adding an additive containing nitrogen, phosphorus, and carbon dioxide (CO ₂ ) to provide components, and light emission that provides light energy that allows the microalgae to grow in the contaminated water of the internal space A device may be provided.

  In another aspect of the present invention, radioactively contaminated water and microalgae that grow in the radioactively contaminated water are introduced, each having a sealed internal space and a plurality of cultures connected in series with each other. A tank, a measurement unit that acquires various types of information in the plurality of culture tanks, a local control unit that controls operations of the plurality of culture tanks by a remotely received control signal, and information received from the measurement unit In the method for purifying radioactive contaminated water containing a plurality of nuclides in a purification system including a remote control system that transmits a control signal to the local control unit using a radioactivity, the first culture tank among the plurality of culture tanks has a radioactivity. Charging the contaminated water; charging and culturing the first microalgae in the first culture tank to purify the radioactively contaminated water; and releasing the primary purified from the first culture tank. Transferring the contaminated water to the second culture tank, and purifying the radioactively contaminated water by introducing and culturing a second microalga of a different species from the first microalgae into the second culture tank; A method for purifying radioactive contaminated water using microalgae, comprising the steps of introducing radioactive contaminated water into a culture tank and then purifying the radioactive contaminated water by introducing the first microalgae.

  A further aspect of the present invention provides a culture tank for culturing microalgae capable of storing contaminated soil mixed with water and collecting radionuclides in a system for purifying soil contaminated with radioactivity, A measuring unit that acquires various information of the culture tank, a local control unit that controls a device that provides a culture environment for the microalgae in the culture tank according to a remotely received control signal, and a culture medium A microalgae harvesting device that dries and harvests microalgae and separates them, and a remote control system that transmits a control signal to the local control unit using information received from the measurement unit. Provide a purification system.

  A further aspect of the present invention is an artificial lake for purifying a large amount of soil contaminated with radioactivity in a wide area due to an accident at a nuclear power plant, wherein the soil contaminated by creating an artificial lake in the area The water storage space for cultivating microalgae that can receive and store contaminated water and collect radionuclides, a measuring unit for acquiring various information of the water storage space, and a control signal received remotely A local control unit that controls a device that provides a culture environment for the microalgae in space, a microalgae harvesting device that dries, harvests and separates microalgae attached to a culture medium, and information received from the measurement unit An artificial lake for purifying radioactive soil contamination including a remote control system for transmitting a control signal to the local control unit.

  According to the present invention having the above-described configuration, the radioactive nuclear water that can be generated during the processing of spent nuclear fuel and spent nuclear fuel in the nuclear power plant and / or the radioactivity generated in the event of an accident or serious accident in the operating nuclear power plant. By putting the contaminated water into an appropriate microalgal culture tank and allowing the microalgae to grow in the culture tank and to absorb and / or absorb radioactive materials in the contaminated water, Substances and radioactively contaminated water can be stably purified, and a large amount of radioactive soil contamination in a wide range of radioactively contaminated areas can be purified to improve the safety of nuclear power plants.

  In addition, according to the present invention, a microalgae culture tank is provided in a sealed type, and the culture environment in the culture tank is remotely and automatically controlled in real time, thereby minimizing the radiation exposure of workers on site. It is possible to improve the safety of workers on site.

  Furthermore, the present invention can cultivate only one kind of microalgae in one culture tank, and connect various culture tanks in series, so that various kinds of microalgae that are difficult to cultivate together can be used simultaneously. Therefore, various kinds of radioactive substances in radioactively contaminated water can be efficiently removed.

  In addition, the present invention relates to radioactive polluted water that is generated continuously and in large quantities, such as when cooling water for cooling spent nuclear fuel and underground water flowing underground in a nuclear power plant are contaminated with radioactive materials. It is possible to provide a purification technique capable of purifying the apparatus remotely and automatically in a stepwise and continuous manner. Therefore, when compared with a conventional temporary storage method for radioactively contaminated water, the present invention can provide a radioactively contaminated water treatment technique more stably and efficiently. In addition, when compared with a conventional groundwater inflow blocking technique using a temporary ice blocking wall, the present invention can provide a contaminated water treatment technique that is more stable and sustainable.

It is a block diagram which shows simply the whole structure of the radioactive contamination water purification system using the micro algae concerning one Embodiment of this invention. It is a block diagram which shows the structure of a remote control system roughly. It is a block diagram which shows roughly the structure of a remote control part in a remote control system. It is a block diagram which shows roughly the structure of a micro algae culture system. It is the schematic which showed notionally the microalga culture system centering on the culture tank. It is a block diagram which shows roughly the structure of a measurement part in a micro algae culture system. It is a block diagram which shows roughly the structure of a local control part in a micro algae culture system. It is a figure which shows the structure of a culture tank roughly. It is a figure which shows roughly the example of the structure by which two culture tanks were connected in series.

  Advantages and features of the present invention, and methods for achieving the same will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. On the other hand, in the description of the embodiment of the present invention, when it is determined that a specific description for a function or configuration publicly disclosed in advance unnecessarily obscure the gist of the present invention, the detailed description thereof is omitted. The terms described later are terms defined in consideration of the functions in the embodiments of the present invention, and this may vary depending on the user, the intention of the operator, the custom, or the like. Therefore, the definition must be made based on the entire contents of this specification.

  The present invention is proposed for the treatment of radioactively contaminated water that can occur during the processing or processing of spent nuclear fuel at a nuclear power plant or can occur in the event of a serious accident that damages the reactor vessel. The present invention proposes a technique for treating radioactive contaminated water that minimizes the exposure of workers mobilized in the treatment work of contaminated water and treats the contaminated water stably and environmentally. The main application field of the present invention is the purification treatment of radioactively contaminated water using the microalgae, the oldest living organism on the earth that has survived by adapting to the earth change for over 3.5 billion years on the earth. It is a field to do.

It is confirmed from the following references 1, 2, and 3 that studies have been conducted that microalgae can be used to purify radioactively contaminated water.
Reference 1: An extremely radioresistant green eukaryote for radionuclide bio-decontamination in the nuclear industry, Richard Bligny et.al., Energy Environment Science, 2013, 6, 1230-1239, DOI: 10, 1029 / C2EE23129H.
Reference 2: Algae Industry megazine.com, April 4, 2011.
Reference 3: Novel Radioresistant Algaeof the Coccomyxa Genus, March 28, 2013, US Patent Application Publication No. 2013/0078707

  Among the above-mentioned references, Reference 1 and Reference 2 are heavy metals (Zn-65, AG-110) in which the special microalgae Clostelium Moniliferum (Costerium Moniliferum) and Coccomixa Actinabiotis (Coccomyxa Actinabiotis) are used. In a paper and article published that adsorbs, captures and absorbs fission products (CS-137, CO-60, SR-90, U-238) and converts them into stable non-radioactive materials without radioactivity is there. The strain of Kokkomixa actinaviotis microalgae in Reference 1 corresponds to Reference 3 which is a publicly-known publication of a patent application in the United States in March 2013.

  Referring to Reference 1 and Reference 2 announcements, a special kind of microalgae among the oldest organisms that have been adapted to earth change over the earth for over 3.5 billion years is a radioactive substance. It can be inferred that it has the property of removing radioactivity by converting and converting it into a stable isotope by absorbing, capturing and absorbing special nuclides in a particularly efficient manner. It is judged to be concentrated on the search for microalgae that absorb radioactive substances and convert them into non-radioactive isotopes.

  In particular, iodine I-131, cesium CS-134, and CS-137, which are the main radioactive materials of radioactively contaminated water, which have been a hot topic since the accident at the nuclear power plant in Fukushima, and strontium SR-90, tellurium It is important to search for special microalgae for adsorption, capture, and absorption of radioactive substances such as TE-127 and krypton KR-85.

  The inventor of the present invention paid attention to the fact that special microalgae used for the treatment of radioactive substances among such microalgae have been discovered. Currently, among various types of microalgae, the ability to capture or adsorb specific radioactive substances and separate and remove radioactive substances from contaminated water, the ability to absorb radioactive substances and reduce radiation in contaminated water, Or, attempts have been made to classify special microalgae with special functions that can treat radioactive materials, such as the ability to remove radionuclide radiation by converting radioactive materials into safe non-radioactive materials. ing.

  Accordingly, the inventor of the present invention has focused on providing a technology that can purify radioactively contaminated water in an environmentally friendly manner by using a kind of microalgae having a function of capturing or adsorbing at least one radioactive substance. Therefore, the present invention is a microalgae that allows the microalgae to remove the radioactive substances in the radioactively contaminated water by culturing the microalgae in the radioactively contaminated water mixed with the radioactive substances. It was noted that it is possible to provide radioactive nuclear material treatment and purification technology for radioactive contaminated water.

  According to the present invention, a specific type of microalgae capable of treating radioactive substances is cultured in a culture tank filled with radioactively contaminated water, and by separating and removing the microalgae that have adsorbed or absorbed the radioactive substances during the culture process, The radioactive material in the contaminated water can be purified.

  In general, the radioactively contaminated water contains not only one type but also various types of radioactive substances. Therefore, in order to purify the radioactively contaminated water in such a case, the present invention connects a plurality of culture tanks in series, and different types that can efficiently treat different types of radioactive substances in each culture tank. Incubate microalgae. Therefore, various types of radioactive substances in the radioactively contaminated water are purified in stages by a system in which one type of radioactive substance is purified in one culture tank while passing through several culture tanks sequentially. obtain.

  For example, assume a system in which five culture tanks are connected in series. Among the five culture tanks, the first culture tank into which radioactively contaminated water is first introduced cultivates special microalgae that adsorb or absorb I-137 in a circle. Although only I-137 is removed from the purified water discharged from the first culture tank, it may contain the remaining radioactive material. This purified water is still radioactively contaminated water. Purified water discharged from the first culture tank, that is, radioactively contaminated water, is put into the second culture tank. In the second culture tank, special microalgae that fully adsorb or absorb CS-134 and CS-137 are cultured. Then, the purified water discharged from the second culture tank is added to I-137 to remove CS-134 and CS-137, but the remaining radioactive material is included as it is. This purified water is still radioactively contaminated water. The purified water discharged from the second culture tank, that is, radioactively contaminated water is put into the third culture tank. In the third culture tank, special microalgae that adsorb or absorb SR-90 in a circle are cultured. In the same manner, TE-127 is processed in the fourth culture tank into which the radioactively contaminated water discharged from the third culture tank is charged. Finally, in the fifth culture tank into which the radioactively contaminated water discharged from the fourth culture tank is charged, special microalgae that adsorb or absorb KR-85 in a circle are cultured.

  In this way, by separating a plurality of types of microalgae sequentially in a multi-stage manner and culturing them in different culture tanks, it is possible to avoid competition for survival of the suitable person among the microalgae. Moreover, the efficiency of culture | cultivation and a radioactive substance process can be improved by using culture | cultivation environment and culture solution, such as the temperature of one kind of special microalgae, for every culture | cultivation tank.

  The spent nuclear fuel is separated from the nuclear fuel assembly and disassembled, or the nuclear fuel rod cladding tube is melted to separate the nuclear fuel pellets to produce the original nuclear fuel powder. It is possible to treat radionuclides by culturing special microalgae with radioactive substances dissolved in water.

  In particular, the present invention provides remote control of the operation of various devices that provide a culture environment, such as the introduction and discharge of radioactively contaminated water to and from the culture tank, the introduction and discharge of microalgae to minimize the radiation exposure of workers. The system is remotely adjusted and controlled by the control system, and the radioactivity is monitored and processed in real time.

  Hereinafter, a radioactive polluted water purification system and method using microalgae according to exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram simply showing an overall configuration of a radioactively contaminated water purification system using microalgae according to an embodiment of the present invention.

  Referring to FIG. 1, a radioactively contaminated water purification system using microalgae includes at least one microalgae culture system 200 connected to a remote control system 100 via a communication network. As shown in the illustrated example, three microalgae culture systems 200 are connected side by side, but this is only an example, and it is obvious that fewer or more microalgae culture systems 200 are connected. is there.

  The remote control system 100 may include, for example, a tablet, a laptop, a desktop, a server system, and the like, and may be realized by a computing device configured to receive data and transmit control signals via a communication network.

  The microalgae culture system 200 is a system in which radioactively contaminated water mixed with a radioactive substance is introduced into a culture tank that provides a sealed environment for culturing microalgae. The microalgal culture system 200 includes one culture tank or a plurality of culture tanks connected in series.

  The microalgae culture system 200 measures the temperature, pressure, water level, nitrogen concentration, phosphorus concentration, carbon dioxide concentration, pH, illuminance, radiation, etc. of the culture tank in real time, and transmits this measurement data to the remote control system 100. To do. The remote control system 100 transmits a control signal so as to control the environment in the culture tank of the microalgae culture system 200 based on the received measurement data.

Microalgae are microorganisms that live in water by photosynthesis that has survived and adapted to any global environment on the earth for about 3.5 billion years. Light for cultivation, water in the proper range, pH in the proper range and / or nitrogen / phosphorus is required nutrients and CO _2, such as. The microalgae are generally in an environment rich in nitrogen / phosphorus / CO _{2 and the} like at a temperature of about 10 to 50 cm from the surface of water with a large amount of sunlight, the water temperature is about 20 to 25 ° C., and the ph is about 7 to 8 Incubate in full circle. Therefore, the microalgae culture system 200 is cultivated for about 10 to 15 days in accordance with the optimum conditions necessary for the culture of the microalgae with the temperature of the radioactively contaminated water, and maximizes the treatment efficiency by maximizing the multiplication factor. You have to control it.

  Accordingly, the microalgae culture system 200 measures the temperature, pressure, water level, nitrogen / phosphorus / carbon dioxide concentration, illuminance, pH, and the like of the radioactively contaminated water in real time and transmits them to the remote control system 100. The remote control system 100 provides control signals for adjusting the environment such as temperature, pressure, water level, nitrogen / phosphorus / carbon dioxide concentration, illuminance and pH, etc., to the optimal culture conditions for microalgae. To system 200.

For this purpose, the sealed culture tank of the microalgae culture system 200 includes a plurality of pipes necessary for the input and discharge of radioactively contaminated water, microalgae, and nitrogen / phosphorus / CO ₂ , and opening / closing operations of the respective pipes. There are provided a valve and a pump, a heater and cooler facility for adjusting the temperature in the culture tank, an illuminance adjusting device in the culture tank, and the like. For remote monitoring and control, radiation in the culture tank and radiation in the site where the culture tank is provided can be measured. Moreover, the situation in the culture tank can be photographed with a camera image such as CCTV.

  2 and 3 illustrate the remote control system in more detail in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  FIG. 2 is a block diagram schematically showing the configuration of the remote control system in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  Referring to FIG. 2, the remote control system 100 includes a transmission / reception unit 110, a remote control unit 130, a user input / output unit 150, an imaging data storage 160, a measurement data storage 170, and a control data storage 180.

  The transmission / reception unit 110 is a module that transmits and receives data via a communication network capable of bidirectional data communication with the microalgae culture system 200. The transmission / reception unit 110 can modulate the digital data into, for example, packet-based signal data and transmit it.

  The remote control unit 130 generates a control signal for controlling the culture environment of the microalgae culture system 200 based on the imaging data and measurement data received by the transmission / reception unit 110 and the control data stored in advance. The generated control signal can be transmitted by the transmission / reception unit 110.

  The user input / output unit 150 is an input device through which a user can input commands and data, and an output device that allows the user to visually and / or audibly recognize. For example, input devices may include a keyboard, mouse, key buttons, trackball, joystick, touch-input device, microphone, and the like. The output device may include a display, a printer, a speaker, and the like.

  The shooting data storage 160, the measurement data storage 170, and the control data storage 180 are modules that store shooting data, measurement data, and control data, respectively. The imaging data is still image or moving image data in the culture tank received from the microalgae culture system 200, for example, taken by CCTV. The measurement data may be data received from the microalgae culture system 200, for example, data obtained by measuring temperature, pressure, illuminance, concentration, pH, etc. in the culture tank. The control data may be data relating to data for controlling the culture environment of the microalgae culture system 200 as data stored in advance.

  FIG. 3 is a block diagram schematically showing the configuration of the remote control unit in the remote control system shown in FIG.

  Referring to FIG. 3, the remote control unit 130 includes various control units for controlling each unit of the microalgal culture system 200. As an example illustrated, the remote control unit 130 includes a contaminated water control unit 131, a microalgae control unit 132, a culture medium control unit 133, a temperature control unit 134, an atmospheric pressure control unit 135, an illuminance control unit 136, and a nitrogen concentration control unit 137. A phosphorus concentration control unit 138, a carbon dioxide concentration control unit 139, and a central controller 140.

  The contaminated water control unit 131 operates to put radioactive contaminated water into the culture tank of the microalgal culture system 200, and discharges purified water (ie, radioactive contaminated water) to the outside of the culture tank of the microalgal culture system 200. This module controls the operation to be performed.

  The microalgae control unit 132 is a module that controls the operation of putting the microalgae culture solution into the culture tank of the microalgae culture system 200. Microalgae can be put into a state that is contained in a culture solution that has been cultured in a laboratory or a pretreatment chamber.

  The microalgae cultured in the culture tank are discharged together with the radioactively contaminated water in the process of discharging the radioactively contaminated water. As another method, the microalgae may be discharged together with the culture medium in the process of discharging the culture medium while attached to the culture medium. Therefore, a separate control unit for discharging microalgae is not shown. Although not shown, for example, it may further include a module for controlling an apparatus for filtering discharged radioactive contaminated water to remove microalgae.

  The culture medium control unit 133 is a module that controls the operation of putting the culture medium into the culture tank of the microalgae culture system 200 and the operation of discharging the culture medium to the outside of the culture tank of the microalgae culture system 200. It is preferable that the culture medium has a specific gravity and a structure that can maintain a generally constant form in water without being submerged on the bottom of the water but floating on the water as a form of yarn, net, or fabric.

  In this way, when the flexible culture medium is provided so as to float in various forms in the free space of contaminated water in the culture tank, there is no need to provide a separate structure for supporting or fixing the culture medium inside the culture tank. Therefore, there is an advantage that manufacturing is easy.

  In addition, when a culture medium made of a flexible material is used, an apparatus for pulling out the culture medium to the outside of the culture tank or putting the culture medium inside can be easily configured. For example, if the control lines connected to one end and the other end of the culture medium are respectively wrapped around a first roller and a second roller provided outside or outside the culture tank, the first roller and / or the second roller By driving the roller, the culture medium can be put into the culture tank or discharged outside the culture tank.

  The temperature control unit 134 includes control of a heating device and a cooling device that keep the temperature of the radioactively contaminated water within the growth temperature range of the microalgae in the culture tank of the microalgae culture system 200.

  The atmospheric pressure control unit 135 is a module that controls the gas pressure in a portion of the culture tank of the microalgae culture system 200 that is not filled with radioactively contaminated water. Since the culture tank is a closed type, if the increase in pressure is left unattended, the culture tank will be mechanically damaged. Therefore, a safety valve and a control operation are required to prevent this.

  The illuminance control unit 136 controls the supply operation of light energy, which is one of the growth conditions of the microalgae in the culture tank of the microalgae culture system 200. The light energy is supplied via a light emitting device such as an LED (light emitting diode). Such a light-emitting device may be provided at a plurality of positions in the culture tank and may be provided in the radioactively contaminated water. In this case, the LED is preferably waterproofed.

  The nitrogen concentration control unit 137, the phosphorus concentration control unit 138, and the carbon dioxide concentration control unit 139 are concentrations of additives such as nitrogen, phosphorus, and carbon dioxide, which are the growth conditions of the microalgae in the culture tank of the microalgae culture system 200. To control each. This concentration varies depending on the type of microalgae. Furthermore, it is self-evident that depending on the microalgae, an additive containing less or more kinds is required, and in such a case, a concentration control unit for each corresponding component is further required. .

  And although not shown in figure, control parts, such as a CCTV control part and a radiation dose control part, may also be included.

  The central controller 140 is in charge of the function of managing the operations of the units 131 to 139 in an integrated manner. The central controller 140 can receive the captured data measurement data from the microalgae culture system 100 in real time and display it to the user or generate an alarm. An alarm occurs when the measurement data deviates from a predetermined reference value. Alarms include culture tank pressure, temperature, water level, LED illuminance, culture tank, and radiation dose warnings within the site. At the same time, the central controller 140 displays the operating state of each valve, pump, lamp, electric heater, etc. via the user input / output device. In addition, the central controller 140 can provide a screen so that a user can manually control on / off operation of valves, pumps, electric heaters, LED lamps, and the like.

  The above-described remote control system 100 is installed at a location far away from the microalgae culture system 200 including a culture tank in which actual contaminated water purification processing is performed.

  4 to 7 illustrate in more detail the microalgae culture system in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  FIG. 4 is a block diagram schematically showing the configuration of the microalgae culture system in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  Referring to FIG. 4, the microalgae culture system 200 includes a transmission / reception unit 210, a culture tank 220, a measurement unit 230, a local control unit 250, and a raw material tank 270.

  The transmission / reception unit 210 is a module that can communicate with the transmission / reception unit 110 of the remote control system 100.

  The measurement unit 230 measures various factors in the culture tank 220 and transmits the measured data to the remote control system 100 via the transmission / reception unit 210. The measurement unit 230 will be described in detail below with reference to FIG.

  The local control unit 250 receives a control signal from the remote control system 100 via the transmission / reception unit 210, and adjusts the environment in the culture tank 220 by controlling the operation of various apparatuses according to the received control signal. It is. The local controller 250 will be described in more detail below with reference to FIG.

  Although the raw material tank 270 is illustrated as one module, it exists as a number corresponding to various raw materials such as radioactively contaminated water, microalgae culture solution, culture medium roll, carbon dioxide, nitrogen, and phosphorus. For example, although the raw material tank 270 is illustrated as being locally present in the microalgae culture system 200, it may be remotely provided at a position far away from the microalgae culture system 200.

  In the illustrated example, the culture tank 220 has an almost cylindrical inner space, is made of a corrosion-resistant material such as stainless steel, and is sufficiently thick to withstand radiation shielding and design pressure. Designed with.

  The culture tank 220 is preferably a sealed type, and various pipes each having an on-off valve and an inflow / exhaust pump that are remotely controlled are connected, and various measuring devices are provided. The culture tank 220 will be described in more detail with reference to FIGS.

  FIG. 5 is a schematic diagram for conceptually explaining the microalgae culture system shown in FIG. 4 focusing on the culture tank.

  Referring to FIG. 5, the culture tank 220 provides an environment that allows microalgae to grow in radioactively contaminated water. Therefore, the culture tank 220 is provided with contaminated water, microalgae, culture medium, light, nitrogen, phosphorus, carbon dioxide, temperature, and the like. When the culture is completed, the purified water and the culture medium are discharged. The discharged purified water is in a state in which radioactive substances have been removed from the input contaminated water by microalgae. The discharged culture medium is in a state where microalgae that have adsorbed or absorbed radioactive substances are fixed.

  The microalgae adhering to the culture medium is separated from the culture medium or used as an organic fertilizer in a fixed state, or recycled as a biomass raw material (RDF, carbonized fuel).

  The radioactively contaminated water introduced into the culture tank 220 may be generated by radioactive contamination of groundwater around the nuclear power plant at the time of a serious accident such as damage to a reactor vessel. As another example, it may have occurred during the normal operation of a nuclear power plant during the cooling process of spent nuclear fuel and during a transient accident at an operating nuclear power plant.

  FIG. 6 is a block diagram schematically showing the configuration of the measurement unit in the microalgae culture system shown in FIG.

  Referring to FIG. 6, the measurement unit 203 includes a water level measurement device 231, a water temperature measurement device 232, a nitrogen concentration measurement device 233, a phosphorus concentration measurement device 234, a carbon dioxide concentration measurement device 235, a pH measurement device 236, a camera 237, and an air temperature measurement. Instrument 238, barometer 239, illuminance meter 240, and radiation meter 241.

  The water level measuring device 231 is a measuring device that measures the level of contaminated water in the culture tank 220. The water temperature measuring instrument 232 is a measuring instrument that measures the temperature of contaminated water in the culture tank 220. The nitrogen concentration measuring device 233, the phosphorus concentration measuring device 234, the carbon dioxide concentration measuring device 235, and the pH measuring device 236 are the nitrogen concentration, phosphorous concentration, carbon dioxide concentration, and pH in the contaminated water put in the culture tank 220. It is a measuring instrument that measures each.

  The camera 237 is a device that can shoot a moving image, for example, like CCTV.

  The air temperature measuring device 238 is a measuring device that measures the temperature of the air portion above the contaminated water in the culture tank 220. The atmospheric pressure measuring device 239 is a measuring device that measures the pressure of the air portion above the contaminated water in the culture tank 220. The illuminance meter 240 measures the illuminance measured inside the culture tank 220 and / or in the contaminated water by a light emitting device such as an LED. The radiation measuring instrument 241 may be a measuring instrument that measures the radiation dose inside and outside the culture tank 220 (that is, the building or site where the culture tank is provided).

  FIG. 7 is a block diagram schematically showing the configuration of the local control unit in the microalgae culture system shown in FIG.

  Referring to FIG. 7, the local control unit 250 includes a contaminated water input pipe 251, a purified water discharge pipe 252, a microalgae input pipe 253, a temperature regulator 254, an additive input pipe 255, a light emitting device 256, and a culture medium transfer device 257. Control the operation. The local control unit 250 does not judge and control itself, but controls the operation of such a device by a control signal from the remote control system 100 (see FIGS. 1 and 2).

  The contaminated water input pipe 251 is remotely controlled as a pipe for introducing radioactive contaminated water into the culture tank 220 (that is, controlled by a control signal transmitted by the remote control system 200, the same applies hereinafter). Prepare. The valve is for opening and closing operation, and the pump provides a forcing force to be turned on. The purified water discharge pipe 252 includes a valve and a pump that are remotely controlled as a pipe for discharging radioactively contaminated water into the culture tank 220. The microalgae input pipe 253 includes a valve and a pump that are remotely controlled as pipes for supplying the microalgae culture solution into the culture tank 220. The additive charging pipe 255 includes valves and pumps that are remotely controlled as pipes for adding additives such as nitrogen, phosphorus, and carbon dioxide.

  The temperature regulator 254 includes a heater and a cooler, and operates to regulate the temperature of contaminated water in the culture tank 220. For example, a plurality of light emitting devices 256 are provided inside and outside the contaminated water as LED lamps.

  The culture medium transfer device 257 is a device for charging the culture medium into the culture tank 220 and discharging it to the outside of the culture tank 220. The culture medium transfer device 257 may include a roller and a drive motor for rotating the roller, and the drive motor is remotely controlled. A control line connected to the culture medium 220 is wrapped around the roller of the culture medium transfer device 257 or the culture medium is wrapped around the control line.

  8 and 9 show a culture tank in more detail in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  FIG. 8 is a diagram schematically showing the configuration of a culture tank in the radioactively contaminated water purification system using microalgae according to one embodiment of the present invention.

  Referring to FIG. 8, an example in which about two thirds of the culture tank 220 is filled with contaminated water is shown. A contaminated water input pipe 251 is connected to the upper side surface of the culture tank 220, and a contaminated water discharge (that is, purified water discharge) pipe 252 is connected to the lower side surface of the culture tank. The microalgae culture solution 253 is connected to the upper side surface of the culture tank.

  A plurality of light emitting devices 256 are provided in the upper part, the side part, and the lower part of the culture tank, and may be, for example, an LED lamp. It is confirmed that the light emitting device 256 is also provided at a position locked to the contaminated water. Generally, in the natural state, microalgae inhabit and cultivate up to about 50 cm from the water surface. In the present invention, a waterproof LED lamp is provided in the culture tank so that light can be reflected in the water so that microalgae can grow anywhere in the culture tank regardless of the depth of contaminated water. I will provide a.

  In addition, the culture medium 260 is preferably a mesh type in the form of fiber, net, or woven fabric. As shown in FIG. 8, the culture medium 260 is connected to the culture medium transfer device 257 at both upper ends by control lines. It is preferable to be provided so as to be immersed in the contaminated water.

  The control line connected to the culture medium 260 may be a wire or a rope, but is not limited thereto, and various types can be used. In addition, the control line not only plays the role of putting the culture medium 260 into and out of the culture tank 220 but also the role of adjusting the position and height of the culture medium 260. Controlled by transfer device 257.

  The culture medium 260 provides a structure in which microalgae are attached and grow, and the size of the mesh can be changed according to the characteristics of the special microalgae. Therefore, when the culture medium 260 is discharged after culturing for about 10 to 15 days, the microalgae that collected the nuclide are also discharged together, and the discharged culture medium 260 is finely provided outside the culture tank 220 by the control line. Automatically move to algae harvest space (not shown). In the microalgae harvesting space, the microalgae harvesting device (not shown) dries and harvests the microalgae attached to the culture medium 260 and separates the culture medium 260 from which the microalgae have been separated. Move inside.

  As described above, the culture medium 260 has to be discharged to the outside of the culture tank 220 and then charged again. Therefore, the culture tank 220 has an entrance (not shown) through which the culture medium 260 and a control line connected thereto pass. Must be formed.

  On the other hand, the culture medium transfer device 257 includes a first culture medium transfer device 257a provided on one side of the culture tank 220 and a second culture medium transfer device 257b provided on the other side. Here, the entrances and exits for the culture medium 260 may be formed entirely at the positions where the first and second culture medium transfer devices 257a and 257b are provided, or may be formed only on one side.

  The first culture medium transfer device 257a includes a first roller (not shown) and a first drive motor (not shown) that rotates the first roller. The first roller and the first drive motor may be provided on the side wall of the culture tank 220 or may be provided outside the culture tank 220.

  The second culture medium transfer device 257b includes a second roller (not shown) and a second drive motor (not shown) that rotates the second roller. The second roller and the second drive motor may be provided on the side wall of the culture tank 220 or may be provided outside the culture tank 220.

  When the first and second culture medium transfer devices 257a and 257b are formed outside the culture tank 220, it is preferable that two entrances through which a control line connected to the culture medium 260 can pass are formed.

  As shown in FIG. 8, the control lines connected to both ends of the culture medium 260 provided in the culture tank 220 are surrounded by the first roller and the second roller, for example, the first roller If rotated, the culture medium 260 is discharged to the outside of the culture tank 220 through the first inlet / outlet. Here, the culture medium 260 may be configured to be surrounded by the first roller, or the culture medium 260 may be configured to move to the microalgae harvesting space along the control line.

  Further, the discharged culture medium 260 may be recycled after moving to the microalgae harvesting space and separating the microalgae as described above, or may be utilized as an organic fertilizer or biomass fuel.

  On the other hand, when the microalgae are separated from the culture medium 260 discharged to the outside of the culture tank 220 or replaced with a new culture medium 260, the second roller positioned on the opposite side is rotated to rotate the second algae. The culture medium 260 can be put into the culture tank 220 using the control line surrounded by the rollers.

  In this way, when the culture medium 220 is made of a flexible material such as a fiber, a net, or a fabric, and one end and the other end of the culture medium 260 are respectively connected to the rollers of the culture medium transfer device 257, remote control can be performed without the assistance of the operator. By controlling, the culture medium 260 can be easily put into the culture tank 220 or taken out of the culture tank 220, thereby collecting the microalgae collecting the radionuclide outside the culture tank and purifying the number of radioactive contamination. can do.

  On the other hand, as shown in the figure, a plurality of culture media 260 may be connected in series and sequentially put into the culture tank 220 without using the culture media 260 manufactured in one unit. In this case, only one culture medium transfer device 270 that drives the first roller may be used.

  That is, after the first unit culture medium 260 is introduced into the culture tank 220 to improve the primary purification process, the first roller is rotated to discharge the first unit culture medium 260 through the first inlet / outlet. The second unit culture medium 260 connected in series to the first unit culture medium 260 is introduced into the culture tank 220 through the second inlet / outlet. Next, after improving the secondary purification process, when the second unit culture medium 260 is discharged through the first inlet / outlet, the third unit culture medium 260 connected to the second unit is connected through the second inlet / outlet. A plurality of culture media 260 may be sequentially added to the inside of the culture tank 220 by such a method. In this way, it is not necessary to replace the culture medium 260 for each unit process, and the culture medium 260 discharged after performing a long-term process can be processed at a time, so that work efficiency can be improved.

  On the other hand, since radionuclides are collected in the culture medium 260 that enters and exits through the first or second inlet / outlet, the first and second culture medium transfer devices 257a and 257b are connected to the outside in order to prevent exposure. A shielding cover for isolation is provided outside the culture tank 220.

  The culture tank 220 includes a camera 237, a pressure measuring device 239, a safety valve 221, a temperature measuring device 232, an air temperature measuring device 238, a water level measuring device 231, a pH measuring device 236, and an additive supply pipe 255 such as carbon dioxide. Although a temperature regulator 254, etc., can be included, which can include heaters, and coolers, it is obvious that various other instrumentation and input and discharge piping may be connected if necessary. .

  The safety valve 221 is normally closed, and is automatically opened when the pressure in the culture tank 220 exceeds a predetermined value, and automatically adjusts the pressure in the culture tank 220.

  FIG. 9 is a diagram schematically illustrating an example of a configuration in which two culture tanks are connected in series in a radioactively contaminated water purification system using microalgae according to an embodiment of the present invention.

  Referring to FIG. 9, two culture tanks 220 ', 220 "are connected" in series ". That is, the contaminated water discharged to the first culture tank 220 ′ is input to the second culture tank 220 ″. In the illustrated example, only two culture tanks are connected, but this is only an example, and it is obvious that more culture tanks are connected in series when necessary. In this example, the same or different microalgae may be introduced into each culture tank.

  As described above, the radioactively contaminated water purification system using microalgae provided by the present invention can realize the radioactively contaminated water purification method using microalgae according to another aspect of the present invention.

  The method for purifying radioactively contaminated water using microalgae includes a culture step, a measurement step, a remote control step, and a local control step.

  In the culture step, radioactively contaminated water containing radioactive substances in the sealed internal space of the culture tank, microalgae that grow in the radioactively contaminated water, and nutrients that allow the microalgae to grow are added to adjust the temperature. In this step, light energy is provided and the microalgae are cultured so that they can grow.

  The measurement step is a step of generating measurement data by measuring data related to radioactively contaminated water mixed with the microalgae during the culture step.

  The remote control step is a step of receiving the measurement data generated in the measurement step via a communication network and transmitting a control signal to a local control unit connected to the culture tank.

  The local control step receives the control signal transmitted in the remote control step, inputs the radioactively contaminated water into the culture tank and discharges the purified water, inputs the microalgae into the culture tank, and in the culture tank. It is the step which controls the apparatus which provides the growth environment of a micro algae.

  Before and after the culturing step, a culture medium providing a flexible structure in the form of fibers, nets, or fabrics to which the microalgae are attached in the contaminated water in the inner space of the culture tank is introduced into the inner space from the outside. A culture medium charging step and a culture medium discharging step for discharging the culture medium from the internal space of the culture tank to the outside are performed.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and can be implemented by being modified or modified in various forms.

  As an example, the method for purifying contaminated water using the culture tank 220 having a sealed structure has been described above. However, in order to treat a large amount of contaminated water, microalgae are cultured in a large culture tank of an indoor pool scale. Then, the contaminated water may be purified. Even in this case, a measurement unit 230 capable of composing an optimum microalgae culture environment for the culture tank, a local control unit 250, and a microalgae harvesting device for drying, harvesting and separating the microalgae attached to the culture medium are provided. Is preferably configured to be controlled using the remote control system 100.

  As a different example, the method for purifying contaminated water using microalgae has been described above. However, contaminated soil may be purified using microalgae.

  That is, when soil is contaminated due to radioactivity leakage due to an accident at a nuclear power plant, the contaminated soil and water are put into a large culture tank of indoor pool scale and special microalgae are cultured and mixed with the soil. The soil can be purified by separating and harvesting the microalgae that have adsorbed and absorbed the radioactive nuclides from the culture tank. Even in this case, a measurement unit 230 capable of composing an optimum microalgae culture environment for the culture tank, a local control unit 250, and a microalgae harvesting device for drying, harvesting and separating the microalgae attached to the culture medium are provided. Is preferably configured to be controlled using the remote control system 100.

As a further example, when radioactively contaminated soil is generated over a wide area due to an accident at a nuclear power plant, a special radionuclide mixed in the soil by creating a special microalgal culture environment in an artificial lake Can be adsorbed and absorbed, and the cultured special microalgae can be harvested and separated from the artificial lake to remove soil contamination. In this case, it is preferable to provide an automated system that adjusts light, CO ₂ , phosphorus, nitrogen, etc. so that the artificial lake has an optimal culture environment for the special microalgae.

  As described above, the present invention is implemented by being modified or modified in various forms, and the modified or modified embodiments also include the technical idea of the present invention disclosed in the claims to be described later. Of course, it belongs to the scope of rights of the present invention.

100: Remote control system 110: Transmission / reception unit 130: Remote control unit 131: Contaminated water control unit 132: Microalgae control unit 133: Culture medium control unit 134: Temperature control unit 135: Atmospheric pressure control unit 136: Illuminance control unit 137: Nitrogen Concentration control unit 138: In concentration control unit 139: Carbon dioxide concentration control unit 140: Central controller 150: User input / output unit 160: Imaging data storage 170: Measurement data storage 180: Control data storage 200: Microalgae culture system 210: Transmission / reception Unit 220: Culture tank 221: Safety valve 230: Measuring unit 231: Water level measuring device 232: Water temperature measuring device 233: Nitrogen concentration measuring device 234: In concentration measuring device 235: Carbon dioxide concentration measuring device 236: pH measuring device 237: Camera 238: Temperature measuring instrument 239: Pressure measurement 240: Illuminance measuring instrument 241: Radiation measuring instrument 250: Local control unit 251: Contaminated water input pipe 252: Purified water discharge pipe 253: Microalgae input pipe 254: Temperature controller 255: Additive input pipe 256: Light emitting device 257: Culture medium transfer device 260: Culture medium 270: Raw material tank 290: Culture medium

Claims (9)

In the radioactive contamination water purification system using microalgae,
Radioactive contaminated water and microalgae that grow in the radioactive contaminated water are input, and it has a sealed internal space, contaminated water input pipe (251), microalgae input pipe (253), and purification. A culture tank (220) to which a water discharge pipe (252) is connected;
A flexible culture medium (260) to which microalgae can be attached;
Transfer of the culture medium (260) to the sealed internal space of the culture tank (220) or transfer the culture medium to the outside of the culture tank (220) to harvest microalgae that have collected radionuclides A device (257);
A measurement unit (230) for acquiring various types of information in the culture tank (220);
A local control unit that controls operations of the contaminated water input pipe (251), the microalgae input pipe (253), the purified water discharge pipe (252), and the culture medium transfer device (257) according to a control signal received remotely. 250),
A remote control system (100) for transmitting a control signal to the local control unit (250) using information received from the measurement unit (230);
Including radioactive contamination water purification system using microalgae. The culture medium transfer device (257)
A first control line and a second control line respectively connected to one end and the other end of the culture medium (260);
A first roller and a second roller around each of the first control line and the second control line;
Driving means for rotating the first roller and the second roller;
The radioactive polluted water purification system using the microalgae according to claim 1, wherein   The microalgae harvesting device is provided outside the culture tank (220) to dry, harvest and separate microalgae from the culture medium discharged by the culture medium transfer device (257). Item 3. A radioactively contaminated water purification system using the microalgae according to item 2.   The culture tank (220) includes a plurality of culture tanks (220 ′, 220 ″) connected in series to each other, and the plurality of culture tanks (220 ′, 220 ″) include different types of microalgae. The radioactive polluted water purification system using microalgae according to claim 1, wherein   The culture tank (220) is provided with a safety valve (221) that is opened when the pressure in the internal space is equal to or higher than a set value and closed when the pressure is lower than the set value. The radioactive contamination water purification system as described in any one of. In the culture tank (220),
A temperature regulator (254) for adjusting the temperature of the internal space;
An additive charging pipe (255) for charging an additive containing nitrogen, phosphorus, and carbon dioxide (CO ₂ ) for providing a nutrient component capable of growing microalgae in the contaminated water of the internal space;
The microalgae according to any one of claims 1 to 4, further comprising a light emitting device (256) for providing light energy capable of growing the microalgae in the contaminated water of the internal space. Radioactive polluted water purification system. A plurality of culture tanks that are filled with radioactive algae and microalgae that grow in the radioactive contamination water, each having a sealed internal space and connected in series with each other, and the plurality of culture tanks A measurement unit that acquires various types of information, a local control unit that controls the operation of the plurality of culture tanks by a remotely received control signal, and the local control unit that uses information received from the measurement unit In a method for purifying radioactive polluted water containing a plurality of nuclides in a purification system including a remote control system that transmits a control signal,
Charging radioactive contamination water into the first culture tank among the plurality of culture tanks;
Charging and cultivating the first microalgae in the first culture tank to purify radioactively contaminated water;
Transferring the radioactively contaminated water primarily purified from the first culture tank to the second culture tank; and
A second microalga of a different species from the first microalgae is charged and cultured in the second culture tank to purify the radioactively contaminated water, and the radioactively contaminated water is charged into the first culture tank, 1 Purify the radioactive polluted water by introducing microalgae,
A method for purifying radioactively contaminated water using microalgae. In a system to purify soil contaminated by radioactivity,
A culture tank for culturing microalgae that can store contaminated soil mixed with water and collect radionuclides,
A measurement unit for acquiring various information of the culture tank;
A local control unit for controlling an apparatus for providing a culture environment for the microalgae in the culture tank according to a remotely received control signal;
A microalgae harvesting device for drying and harvesting and separating microalgae attached to the culture medium; and
A remote control system for transmitting a control signal to the local control unit using information received from the measurement unit;
A system for the purification of soil contaminated by radiation. An artificial lake to purify a large amount of soil contaminated with radioactivity in a wide area due to an accident at a nuclear power plant,
A water storage space for culturing microalgae that can collect and store radioactive water from contaminated soil contaminated by creating artificial lakes in the area,
A measuring unit for acquiring various information of the water storage space;
A local control unit for controlling a device for providing a culture environment for the microalgae in the water storage space according to a remotely received control signal;
A microalgae harvesting device for drying and harvesting and separating microalgae attached to the culture medium; and
A remote control system for transmitting a control signal to the local control unit using information received from the measurement unit;
Including artificial lakes for the purification of radioactive soil contamination.