WO2014132348A1 - 生物培養システム及び生物培養方法 - Google Patents
生物培養システム及び生物培養方法 Download PDFInfo
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- WO2014132348A1 WO2014132348A1 PCT/JP2013/055032 JP2013055032W WO2014132348A1 WO 2014132348 A1 WO2014132348 A1 WO 2014132348A1 JP 2013055032 W JP2013055032 W JP 2013055032W WO 2014132348 A1 WO2014132348 A1 WO 2014132348A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/44—Means for regulation, monitoring, measurement or control, e.g. flow regulation of volume or liquid level
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/02—Photobioreactors
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/06—Means for regulation, monitoring, measurement or control, e.g. flow regulation of illumination
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/12—Unicellular algae; Culture media therefor
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q3/00—Condition responsive control processes
Definitions
- the present invention relates to a biological culture system and a biological culture method.
- the present invention relates to a technique for culturing a living organism that performs photosynthesis.
- microalgae that can produce biofuels by photosynthesis using sunlight and carbon dioxide in the atmosphere without any competition with food production has attracted attention.
- mass cultivation of algae for the purpose of producing biofuels and useful substances is often carried out outdoors in tropical and subtropical areas where the amount of solar radiation is large so that photosynthesis can be performed to the maximum.
- the amount of solar radiation during the day becomes excessive, and as a result of increasing the temperature in the culture environment by strong light, the growth and metabolism of microalgae are adversely affected. It cannot be said that the culture is performed under optimum conditions.
- Patent Document 1 US Pat. No. 7980024 (Patent Document 1) as a technique for solving the above problems.
- This publication describes that "the heat exchange is performed between the water outside the photobioreactor and the liquid medium in the reactor by suspending the culturing photobioreactor in a pond or lake”. This makes it possible to prevent the temperature of the liquid medium in the culture photobioreactor from becoming high.
- Patent Document 2 describes “a reactor for photosynthesis made of a transparent and flexible material suspended on the water surface”.
- Patent Document 1 it is only described that the culture vessel is floated, and in Patent Document 2, it is described that the culture vessel is floated on the water surface.
- Patent Document 2 it is possible to suppress the temperature rise of the liquid medium by heat exchange with water existing outside the reactor, but since the irradiation intensity of sunlight itself is not reduced, photodamage due to strong light occurs and photosynthesis Function will be reduced.
- the photobioreactor in the conventional floating photobioreactor, the photobioreactor is located on the surface of the water, so the amount of sunlight irradiated cannot be reduced, and it is difficult to avoid light damage due to strong light conditions. .
- the photobioreactor if the photobioreactor is not located on the water surface but can be completely submerged in the water of the external environment, the sunlight from the upper surface of the water is absorbed into the water, resulting in attenuation of the sunlight reaching the reactor Since the amount of irradiation light is reduced, it is possible to avoid light damage due to strong light conditions.
- An object of the present invention is to provide a biological culture system having a function of controlling light environmental conditions so that wavelength components effective in photosynthesis are attenuated as much as possible.
- the biological culture system has a second wavelength region shorter than the first wavelength region than the first wavelength region.
- a light amount measuring unit that measures the amount of light received by the light source and a liquid depth control unit that controls the liquid depth from the liquid surface of the light absorbing solution to the culture vessel based on the measurement result of the light amount measuring unit.
- a second wavelength that is shorter than the first wavelength range than the first wavelength range is used.
- a light absorbing solution that absorbs a large amount of light in the region is stored in a liquid storage container, a culture liquid containing a living organism to be cultured for photosynthesis is stored inside the culture container, the culture container is installed in the liquid storage container, Based on the amount of light received by the culture vessel, the liquid depth from the liquid surface of the light absorbing solution to the culture vessel in the liquid reservoir is controlled.
- Example 1 of this invention It is an example of the biological culture system block diagram which concerns on Example 1 of this invention. It is an example of the biological culture system block diagram which concerns on Example 2 of this invention. It is an example of the biological culture system block diagram which concerns on Example 3 of this invention. It is an example of the biological culture system block diagram which concerns on Example 4 of this invention. It is an example of the biological culture system block diagram which concerns on Example 5 of this invention. It is an example of the biological culture system block diagram which concerns on Example 6 of this invention. It is a graph which shows the relationship between absorption of red light and blue light, and a liquid depth at the time of using the red pigment
- dye No. 102 as an example of the substance which can absorb light of a specific wavelength range preferentially. It is an example which shows the structure of a control apparatus. It is a graph which shows an example of a reference light quantity-liquid depth correlation function. It is an example which shows the control flow in Example 1. FIG. It is an example which shows the control flow in Example 2.
- FIG. 1 is an example of a diagram showing the configuration of the biological culture system of the present embodiment.
- This system includes a liquid storage container 3 capable of storing a liquid (absorbing liquid) 101 in which a substance capable of preferentially absorbing light in a specific wavelength range is stored, and a microalgae installed in the container.
- a transparent or part of the container that can hold the culture solution 2 containing the organism to be cultured for photosynthesis such as polypropylene, polyethylene, ethylene vinyl acetate, polyvinyl chloride, etc.
- a culture container 1 that can be deformed and a function that can measure the amount of light for each desired wavelength region on the upper surface of the culture container 1 and transmit the result to the control device 7
- a light amount measuring device 6 for each wavelength region having a wavelength a pump 8 for injecting carbon dioxide and air into the container, an injection tube 10, and carbon dioxide and air exhaust from the container. Measure the amount of light in the environment installed in the vicinity of the culture vessel with the pump 9, the discharge pipe 11 for taking out, and measure the external light quantity measuring device 4 and the temperature with the function that can send the result to the control device 7
- the temperature measuring device 5 having a function capable of transmitting the result to the control device 7 and the measurement light amount and the temperature result transmitted by the light amount and temperature measuring device receive carbon dioxide and air in the culture vessel. It is constituted by a control device 7 for determining an injection or discharge operation variable and controlling the operation.
- sensors that can measure multiple wavelengths There are sensors that can measure multiple wavelengths. Note that carbon dioxide and air, which are gases supplied to the pump 8, are supplied by a cylinder or other supply source, but are not shown in the drawing.
- FIG. 7 shows an example of the liquid 101 in which a substance capable of preferentially absorbing light in a specific wavelength region is dissolved, and the absorption in the blue light region (400 to 500 nm) is larger than that in the red light region (600 to 700 nm). It is a graph which shows the relationship between absorption of red light and blue light, and a liquid depth at the time of using the red pigment
- red light region (600 to 700 nm) and the blue light region (400 to 500 nm) effective for photosynthesis red light is more easily absorbed by water.
- the light component in the blue light region increases and the light in the red light region decreases, which is not a desirable light condition for photosynthesis. Therefore, in order to avoid optical interference, the intensity of light is reduced, but a method of maintaining the wavelength band component ratio is necessary to reduce the influence on the photosynthesis efficiency to the minimum.
- Figure 7 shows the depth, red light, and blue light of an aqueous solution of red dye No. 102 (concentration 0.00006%), a substance that absorbs more in the blue light region (400-500 nm) than in the red light region (600-700 nm). It is the result of investigating the amount of absorption.
- red light red LED light; wavelength 660 nm
- blue LED light blue LED light; wavelength 470 nm
- the light intensity of blue light is higher than that of red light, unlike the case of tap water. Diminished. From this result, the light intensity is maintained while maintaining the wavelength component ratio by appropriately setting the depth of the liquid in which the substance capable of preferentially absorbing light in the specific wavelength range is dissolved and the concentration of the substance dissolved. It was shown that it can be reduced.
- the control device 7 includes a memory 801, a processor 802, and an interface 803.
- the memory 801 and the processor 802 are connected to an external device via the interface 803, and these devices can be controlled by transmitting and receiving signals. It has become.
- the memory 801 stores a reference light quantity-liquid depth correlation function 807, which will be described later with reference to FIG. 9, and programs of an information transmission / reception unit 804, an information comparison unit 805, and a position adjustment unit 806.
- the processor 802 reads and executes the above-described program, thereby performing each process relating to the liquid depth control described below.
- FIG. 9 shows an example in which the light in the blue light region (400 to 500 nm) is specifically reduced without significantly reducing the light in the red light region (600 to 700 nm) shown in FIG. It is a graph which shows the correlation of the liquid depth of the liquid which melt
- the light quantity-liquid depth correlation is approximated as a linear function, but this approximate function varies depending on the wavelength range of light to be controlled or the characteristics of the substance used to absorb light of a specific wavelength.
- An approximate expression considered to be optimal in each case may be used, and is not necessarily limited to the case of approximation as a linear function.
- the red light is 1,445 ⁇ mol / (m 2 ⁇ sec) per 1 cm of the liquid depth
- the blue light is 8.085 per 1 cm of the liquid depth. Decreases by ⁇ mol / (m 2 ⁇ sec).
- the coefficient of decrease per unit liquid depth is experimentally acquired in advance, and the liquid depth at which a desired light irradiation amount can be obtained is calculated using this coefficient.
- the information transmission / reception unit 804 transmits a measurement instruction signal to the external light quantity measurement device 4 and the temperature measurement device 5 in the environment installed in the vicinity of the culture vessel, and starts measurement in the external light quantity measurement device 4 and the temperature measurement device 5, Each measurement result is received (901).
- this step 901 is repeated at least twice at an arbitrarily set time interval.
- the measurement result is obtained through the information transmitting / receiving unit 804, and the difference between the values obtained and repeatedly measured by the information comparison unit 805 is calculated.
- the difference value exceeds a value arbitrarily set in advance (902)
- the external environment that is, the sun
- an instruction signal is output to the information transmission unit 804 so as to start measurement of the light amount measuring device 6 for each wavelength region.
- the measurement result of the light amount measuring device 6 for each wavelength region received by the information transmitting / receiving unit 804 is acquired, and the amount of irradiation with sunlight read from the reference light amount-liquid depth correlation function 807 is the organism to be cultured.
- the information comparison unit 805 determines whether or not the measurement result of the light amount measurement device 6 by wavelength region is less than the predetermined light amount value when the measurement result of the light amount measurement device 6 by wavelength region dissociates from the predetermined light amount value. (1003).
- the position adjustment unit 806 operates the discharge pump 9 and the gas held in the culture vessel 1 The buoyancy of the culture vessel 1 is reduced by discharging (for example, carbon dioxide and / or air) through the discharge pipe 11, thereby lowering the vertical position of the culture vessel 1 in the liquid reservoir 3. To increase the liquid depth 100 (1005).
- the infusion pump 8 is operated to cause the gas in the culture vessel 1 to flow through the infusion tube 10.
- the buoyancy of the culture vessel 1 is increased, thereby raising the vertical position of the culture vessel 1 in the liquid storage vessel 3, thereby reducing the liquid depth 100.
- the position adjustment unit 806 operates the pumps 8 and 9 by transmitting a control signal, and varies the volume of carbon dioxide and / or gas such as air held in the culture vessel 1 to thereby increase the buoyancy of the culture vessel 1.
- step 1004 After the operation of the liquid depth adjustment (step 1004, step 1005) by the position adjustment unit 806, the process returns to step 1001 and the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel 1 is controlled by the information transmission / reception unit 804. Measurement is performed again, and processing from step 1002 onward by the information comparison unit 805 and the position adjustment unit 806 is performed.
- the control device 7 repeats the operation by the feedback control until the light amount measured by the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel 1 becomes a desired value. Also, during the day, the values measured by the external light quantity measuring device 4 for measuring the light quantity of the environment installed in the vicinity of the culture vessel and the temperature measuring device 5 for measuring the temperature fluctuate every moment. Therefore, the vertical position control of the culture vessel 1 is continuously performed during the day so that the value in the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel becomes a desired value.
- the biological culture system has a shorter wavelength range than the first wavelength range, for example, than the light in the first wavelength range such as the red light range (600 to 700 nm).
- the light quantity measuring unit such as the light quantity measuring device 6 for each wavelength region that measures the quantity of light received by the culture container 1, and the light quantity measurement part
- a liquid depth control unit such as a control device 7 that controls the liquid depth from the liquid level of the liquid (absorbing liquid) 101 to the culture vessel 3, thereby providing a strong light condition when culturing a living organism that performs photosynthesis. It is possible to avoid temperature rise and light damage at the same time, and to reduce the decrease in photosynthetic efficiency An example to do.
- FIG. 2 is a diagram showing a configuration in the second embodiment different from the first embodiment for performing the vertical position control of the culture vessel 1 by the control device 7.
- the light amount measuring device 6 for each wavelength region is installed separately from the culture vessel 1, and a predetermined liquid depth in the depth direction of the liquid reservoir vessel 3, for example, the liquid depth shown in FIG.
- the light amount measuring device 6 for each wavelength region is provided at a position corresponding to 0 in the liquid depth outside the liquid reservoir 3.
- the liquid depth is controlled by the measurement value obtained by the light quantity measuring device 6.
- the liquid depth control by the control device 7 in this embodiment will be described with reference to the flowchart shown in FIG.
- the information transmission / reception unit 804 transmits a measurement instruction signal to the external light quantity measurement device 4 and the temperature measurement device 5 in the environment installed in the vicinity of the culture vessel, and starts measurement in the external light quantity measurement device 4 and the temperature measurement device 5, Each measurement result is received (901).
- this step 901 is repeated at least twice at an arbitrarily set time interval.
- the measurement result is obtained through the information transmitting / receiving unit 804, and the difference between the values obtained and repeatedly measured by the information comparison unit 805 is calculated.
- the liquid depth is controlled in the direction of decreasing the liquid depth (1101).
- the liquid depth control amount at this time is determined based on the reference light quantity-liquid depth correlation function 807, and the control is performed in the culture vessel 1 by operating the discharge pump 9 by the position adjusting unit 806.
- the liquid depth 100 is adjusted by adjusting the buoyancy of the culture vessel 1 by discharging gas (for example, carbon dioxide and / or air) through the discharge pipe 11 or injecting it through the injection pipe 10 (1004, 1005).
- the position adjustment unit 806 operates the pumps 8 and 9 by transmitting a control signal, and varies the volume of carbon dioxide and / or gas such as air held in the culture vessel 1 to thereby increase the buoyancy of the culture vessel 1.
- a control signal varies the volume of carbon dioxide and / or gas such as air held in the culture vessel 1 to thereby increase the buoyancy of the culture vessel 1.
- the operation is temporarily terminated, and then the control returns to the start step after a predetermined time, and the liquid depth control is continued.
- FIG. 3 is a diagram showing still another embodiment 3 for performing the vertical position control of the culture vessel 1 by the control device 7.
- the control device obtains weather information such as the generation and movement of clouds that affect the amount of solar radiation in the area where the biological culture system is installed, which is obtained from the weather artificial satellite 13 via the information receiving facility 14. 7 shows a form of cooperation.
- the information obtained from the weather artificial satellite 13 relates to a wide area including the area where the biological culture system is installed, and fluctuations in the amount of solar radiation and the like in the area where the biological culture system is installed are obtained clouds. It is necessary to predict from the situation (cloud area, vertical thickness, moving speed, etc.). Therefore, it is necessary to construct and prepare a database 12 relating to weather information in the area in advance.
- FIG. 4 is a view showing another embodiment of the culture vessel 1 that can hold the culture solution 2 containing the organism to be cultured and is partially deformed and made of a flexible material and can be deformed.
- a member 102 having a strength that cannot be deformed in the horizontal direction of the bottom portion of the culture vessel 1 is provided.
- the member having a non-deformable strength include, but are not necessarily limited to, a carbon fiber reinforced plastic or metal reinforced with a carbon fiber including a synthetic resin such as plastic.
- FIG. 5 is not the liquid depth control by adjusting the buoyancy of the culture vessel 1 as in Examples 1 to 4, but the culture vessel is provided with a buoyant body 111 that is coupled to the culture vessel 1 and generates buoyancy. It is a figure which shows a structure about Example 5 of the biological culture system which enables 1 vertical direction position control.
- a deformable buoyancy body 111 made of a flexible material coupled to the culture vessel 1 and capable of holding gas, a coupling pair 112 with the culture vessel 1 and a pump for injecting gas into the buoyancy body 113 and the injection pipe 114, a configuration comprising an exhaust pump 115 and an exhaust pipe 116 for exhausting, and the culture solution 2 containing the organism to be cultured in the culture vessel 1 in the culture solution 2 that is necessary for the growth of the organism to be cultured
- a configuration comprising a pump 120 and an injection pipe 130 for supplying carbon or air, and a pump 121 and a discharge pipe 131 for discharging are shown.
- the liquid depth control method in this embodiment will be described.
- the pumps 120 and 121 are operated by the signal from the control device 7 to change the volume of the gas held in the buoyancy body 111.
- the vertical position of the culture vessel 1 connected to the buoyancy body 111 in the liquid reservoir 3 is manipulated.
- the measurement is again performed by the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel, and the discharge pump 120 is operated by the control device 7 when the measured light amount is more than the desired light amount.
- the buoyancy of the buoyancy body 111 is reduced by discharging the gas in the buoyancy body 111 through the discharge pipe 131, thereby lowering the vertical position of the culture vessel 1 in the liquid reservoir 3. Increase the liquid depth 100.
- the buoyancy of the buoyancy body 111 is increased by operating the injection pump 120 and injecting the gas in the buoyancy body 111 through the injection pipe 130, Thereby, the liquid depth 100 is reduced by raising the vertical position of the culture vessel 1 coupled to the buoyant body 111 in the liquid reservoir 3.
- the operation by the feedback control is repeated until the light amount measured by the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel becomes a desired value.
- the buoyancy control flow other than the processing for increasing / reducing the liquid depth it is possible to apply the processing flow as described in the first to fourth embodiments.
- the vertical position control of the culture vessel 1 by the buoyancy body 111 is continued during the day so that the value in the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel becomes a desired value.
- the gas used for liquid depth control is limited to a gas (carbon dioxide or air) that does not affect the growth of the culture target organism in the culture vessel.
- the type of gas injected into the buoyancy body is not particularly limited, and any gas component can be used.
- FIG. 6 shows that the amount of the liquid 101 in which the substance capable of preferentially absorbing light in a specific wavelength region in the liquid reservoir 3 is dissolved is not controlled by controlling the liquid depth by adjusting the buoyancy of the culture container 1. It is an example of the figure which shows the structure of the biological culture system of Example 6 which enables control of the liquid depth 100 by doing.
- the culture vessel 1 is fixed in the liquid reservoir 3 by a bonded body 103.
- the liquid storage container 3 is connected to a storage tank 104 holding a liquid 101 in which a substance capable of preferentially absorbing light in the specific wavelength range is held by a connection pipe 105, and installed in the connection pipe.
- the amount of the liquid 101 in the liquid reservoir 3 can be changed by the pouring / draining pump 106.
- the liquid draining vessel 3 is operated via the connecting pipe 105 by operating the pouring pump 106 by the signal from the control device 7.
- the water level of the liquid 101 in the liquid reservoir 3 is controlled by pouring and draining the liquid 101 into the liquid reservoir 3.
- the culture vessel 1 holds a certain volume of gas component and is fixed by the combined body 103, the water level of the liquid 101 exceeds the upper surface of the culture vessel 1 and the culture vessel 1 Thus, the liquid 101 is overlaid, and a liquid depth 100 is formed.
- the liquid depth 100 changes as the water level of the liquid 101 in the liquid storage container 3 changes, whereby the liquid depth 100 can be controlled.
- measurement is performed by the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel, and when the measured light amount is more than the desired light amount, the control device 7 operates the water injection pump 106. Then, the liquid 101 is poured from the storage tank 104 into the liquid storage container 3 through the connection pipe 105, and the liquid level of the liquid 101 in the liquid storage container 3 is raised, so that the liquid depth 100 is increased. Increase.
- the liquid draining pump 106 is operated to drain the liquid 101 from the liquid reservoir 3 into the storage tank 104 via the connecting pipe 105. Then, the liquid depth 100 is decreased by lowering the water level of the liquid 101 in the liquid reservoir 3.
- the buoyancy control flow other than the processing for increasing / reducing the liquid depth it is possible to apply the processing flow as described in the first to fourth embodiments.
- the operation by the feedback control is repeated until the light amount measured by the light amount measuring device 6 for each wavelength region installed on the surface of the culture vessel becomes a desired value. Also, during the day, the values measured by the external light quantity measuring device 4 for measuring the light quantity of the environment installed in the vicinity of the culture vessel and the temperature measuring device 5 for measuring the temperature fluctuate every moment. Therefore, the control of the liquid depth 100 is continuously performed during the day so that the value in the light quantity measuring device 6 for each wavelength region installed on the surface of the culture vessel becomes a desired value.
- the horizontal position control of the culture vessel 1 can be easily performed in the liquid in the liquid storage vessel 3 as compared with the other embodiments. Become.
- SYMBOLS 1 Culture container, 2 ... Culture solution containing organism to be cultured, 3 ... Liquid reservoir container, 4 ... Light quantity measuring device, 5 ... Temperature measuring device, 6 ... Light quantity measuring device by wavelength region, 7 ... Control device, 8, DESCRIPTION OF SYMBOLS 9 ... Pump, 10 ... Injection pipe, 11 ... Discharge pipe, 12 ... Database, 13 ... Weather satellite, 14 ... Information receiving equipment, 100 ... Liquid depth, 101 ... Absorbing light of specific wavelength range preferentially Liquid with dissolved substance, 102 ... Member having undeformable strength, 103, 112 ... Combined body, 104 ... Storage tank, 105 ... Connection pipe, 106 ...
- Drainage pump 111 ... Buoyant body, 113 ... Injection Pump, 114 ... injection pipe, 115 ... exhaust pump, 116 ... exhaust pipe, 120, 121 ... pump, 130 ... injection pipe, 131 ... exhaust pipe, 801 ... memory, 802 ... processor, 803 ... interface, 804 Information transmitting and receiving unit, 805 ... information comparison unit, 806 ... position adjusting section, 807 ... reference quantity - liquid depth correlation function
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Abstract
Description
図1は、本実施例の生物培養システムの構成を示す図の例である。
本システムは、特定の波長域の光を優先的に吸収することが出来る物質を溶解した液体(吸光液)101を貯留することが出来る液溜め容器3と、その容器内に設置され、微細藻類などの光合成を行う培養対象の生物を含む培養液2を保持できる透明かつ容器の一部もしくは全部が柔軟性素材(例えば、ポリプロピレン、ポリエチレン、エチレン酢酸ビニル、ポリ塩化ビニルなどがあるが、特にこれらに限定されるものではない)から成り変形可能である培養容器1と、その培養容器1の上側表面において所望の波長域別に光量を測定し,その結果を制御装置7に送信することが出来る機能を持った波長域別光量測定装置6と、その容器内に二酸化炭素及び空気を注入するためのポンプ8、注入管10、および容器内から二酸化炭素及び空気排出するためのポンプ9、排出管11と、培養容器近傍に設置した環境の光量測定し,その結果を制御装置7に送信することが出来る機能を持った外部光量測定装置4及び温度を測定し、その結果を制御装置7に送信することが出来る機能を持った温度測定装置5と、前記光量及び温度測定装置により送信された、測定光量及び温度結果を受け取り培養容器内の二酸化炭素及び空気の注入もしくは排出操作変量を決定しその操作を制御する制御装置7より構成される。
所望の青色光照射量[μmol/(m2・sec)]=
(液深0cmでの青色光光量[μmol/(m2・sec)])-8.085 x液深(cm)となるように液深値を算出し、制御に用いれば良い。
所望の赤色光照射量[μmol/(m2・sec)]=
(液深0cmでの赤色光光量[μmol/(m2・sec)])-1.445 x液深(cm)
となるような液深値を算出し制御に用いれば良い。
図2は、前記制御装置7により前記培養容器1の垂直方向位置制御を行うための実施例1とは別の実施例2における構成を示す図である。本実施例においては、波長域別光量測定装置6を、培養容器1とは切り離して設置し、液溜め容器3の深さ方向の所定の液深、例えば図2に示す液深が0に相当する位置、に設ける。また、図2に示す構成例では、液溜め容器3の外部において液深が0に相当する位置に波長域別光量測定装置6を設けている。培養容器近傍に設置した環境の光量測定する外部光量測定装置4及び温度を測定する温度測定装置5による測定値と前記液溜め容器3の液深が0に相当する位置に設置された波長域別光量測定装置6による測定値により液深制御を行う。以下、図11に示すフローチャートを用いて、本実施例における、制御装置7による液深制御について説明する。
図3は、前記制御装置7により前記培養容器1の垂直方向位置制御を行うための、さらに別の実施例3を示す図である。本実施例においては、気象人工衛星13から情報受信設備14を経由して得られる、前記生物培養システムの設置した地域の日射量に影響する雲の発生とその動き等の気象情報を前記制御装置7に連携させる形態を示している。気象人工衛星13から得られた情報は、前記生物培養システムの設置した地域を含む広範な領域に関するものであり、前記生物培養システムの設置した地域での日射量等の変動は、得られた雲の状況(雲の面積、垂直方向の厚さ、移動速度等)から予想する必要がある。そのため、前記地域における気象情報に関するデータベース12を予め構築し具備する必要がある。このデータベース12に対して気象人工衛星13から得られた情報を対応させることにより、前記地域における日射量の変動を予想し、その予想に従って、図10や11に示す動作開始を実施することで、実際の日射量変動に先駆けて制御を開始することが出来、その結果、より精度高い前記培養容器1の垂直方向位置制御が可能となる。
図4は、培養対象の生物を含む培養液2を保持できる透明かつ容器の一部もしくは全部が柔軟性素材から成り変形可能である前記培養容器1の別の実施形態を示す図である。前記前記培養容器1の底面部分水平方向に変形不可能な強度を持つ部材102を設置している。変形不可能な強度を持つ部材としては、プラスチック等の合成樹脂をはじめ炭素繊維により強化した炭素繊維強化プラスチックや金属があるが、必ずしもこれらに限定されない。前記培養容器1の変形可能部分が変形により不均一な形状となった場合でも、前記変形不可能な部材102の設置により、液溜め容器3内における前記培養容器1の水平報方向の位置を保持でき、その結果、前記培養容器1の上面における液深を一定に保持することが可能となる。
図5は、上述の実施例1ないし4のような前記培養容器1の浮力調整による液深制御ではなく、前記培養容器1に結合し浮力を生じさせる浮力体111を具備することで前記培養容器1の垂直方向位置制御を可能する生物培養システムの実施例5について構成を示す図である。
図6は、前記培養容器1の浮力調整による液深制御ではなく、前記液溜め容器3中の特定の波長域の光を優先的に吸収することが出来る物質を溶解した液体101の量を変動させることで液深100の制御を行うことを可能とする実施例6の生物培養システムの構成を示す図の例である。
Claims (14)
- 第1の波長域の光よりも前記第1の波長域に比べて短波長域である第2の波長域の光を多く吸収する吸光液を溜める液溜め容器と、
光合成を行う培養対象の生物を含む培養液を内部に格納して前記液溜め容器内に設置される培養容器と、
前記培養容器が受光する光量を計測する第1の光量計測部と、
前記第1の光量計測部の計測結果に基づいて、前記液溜め容器内における、前記吸光液の液面から前記培養容器までの液深を制御する液深制御部と、を備える、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記第1の光量計測部は、前記培養容器が受光する光量を波長域別に測定する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記液深制御部は、
前記吸光液中で前記培養容器に働く浮力を制御することで前記液深を制御する、
ことを特徴とする生物培養システム。 - 請求項3に記載の生物培養システムであって、
前記液深制御部は、
前記培養容器内の気体の量を制御することで前記浮力を制御する、
ことを特徴とする生物培養システム。 - 請求項4に記載の生物培養システムであって、
前記液深制御部が制御する前記培養容器内の気体は二酸化炭素を含む、
ことを特徴とする生物培養システム。 - 請求項3に記載の生物培養システムであって、
前記培養容器には、
内部に気体を格納できる浮力体が設けられており、
前記液深制御部は、
前記浮力体内の気体の量を制御することで前記浮力を制御する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記培養容器は、
前記液溜め容器中の所定の位置に固定され、
前記液深調整部は、
前記液溜め容器中の前記吸光液の量を調整することで前記液深を制御する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記第1の光量計測部は、前記培養容器が受光する光量を波長域別に測定する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
さらに、前記液溜め容器の外部の光量を計測する第2の光量計測部を備え、
前記液深制御部は、
前記外部の光量に基づいて、前記液深を制御するか否かを判定する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
さらに、前記液溜め容器の外部の温度を計測する外部温度計測部を備え、
前記液深制御部は、
前記外部の温度に基づいて、前記液深を制御するか否かを判定する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記液溜め容器が溜める前記吸光液は、
前記第1の波長域の光よりも、前記第2の波長域の光を多く吸収する色素を溶解させた液体である、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
前記液深制御部は、
前記液深と、前記第1、第2の波長域の光の光量と、の対応関係を予め記憶しており、
前記対応関係に基づいて前記液深を制御する、
ことを特徴とする生物培養システム。 - 請求項1に記載の生物培養システムであって、
さらに、人工衛星から情報を受信する受信部を備え、
前記液深制御部は、
前記人工衛星から前記受信部が受信した天候に関する情報に基づいて前記液深を制御する、
ことを特徴とする生物培養システム。 - 第1の波長域の光よりも前記第1の波長域に比べて短波長域である第2の波長域の光を多く吸収する吸光液を液溜め容器に溜め、
光合成を行う培養対象の生物を含む培養液を培養容器の内部に格納し、
前記培養容器を前記液溜め容器内に設置し、
前記培養容器が受光する光量に基づいて、前記液溜め容器内における、前記吸光液の液面から前記培養容器までの液深を制御する、
ことを特徴とする生物培養方法。
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