JP2011004663A - Carbon dioxide decreasing system by recovery-isolation of sea plankton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a COdecreasing system by recovery/isolation of sea plankton which recovers and isolates plant plankton absorbing COto surely decrease the CO.SOLUTION: The COdecreasing system by recovery/isolation of sea plankton includes recovering plant plankton 1 with ciliary filtering member 4 separately filtering the plant plankton 1 caught together with seawater 2, and isolating the CO-absorbing plant plankton 1 under the ground to recover/isolate the CO.

Description

The present invention relates to a system for reducing CO ₂ by collecting and isolating phytoplankton and zooplankton in the sea.

In recent years, global warming has been regarded as a problem, and a specific policy for suppressing an increase in the concentration of CO _{2 in} the atmosphere, which is a major cause of global warming, has been demanded. In order to suppress an increase in the concentration of CO ₂ , various considerations have been made such as CO ₂ emission regulation, emission credit trading, CO ₂ collection, storage, and sequestration. Conventionally, various techniques for growing phytoplankton in the sea, which are useful for CO ₂ absorption, have been proposed (see, for example, Patent Document 1).

As the phytoplankton grows by photosynthesis, the partial pressure of CO ₂ in the sea decreases, and CO ₂ in the atmosphere is easily absorbed into the sea. As a result, it is considered that by increasing phytoplankton, it is possible to suppress an increase in the concentration of CO _{2 in} the atmosphere by solar energy without using special energy.

Phytoplankton that has absorbed CO ₂ carries the CO ₂ in the seabed sinking slowly, also, carry the CO ₂ in the seabed sunk in excrement also the seabed, including the CO ₂ of zooplankton that eat the phytoplankton. Accordingly, CO ₂ is deposited and deposited on the sea floor by the action of the biological pump, and the CO ₂ is isolated in the deep sea.

However, underwater plankton carrying CO ₂ has been killed and remains, and CO ₂ is released into the sea by decomposition during the process of sinking to the seabed. For this reason, in the sequestration of CO ₂ by deposition / deposition on the sea floor, the amount of CO ₂ sequestered in the sea is limited, and a large effect of CO ₂ reduction cannot be expected at present.

JP 2004-350627 A

The present invention has been made in view of the above situation, and it is possible to recover submarine plankton that can reliably reduce CO ₂ by recovering and isolating phytoplankton and zooplankton in the sea that have captured CO ₂ through growth. · and to provide a CO ₂ reduction system according to quarantine.

In order to achieve the above object, the CO ₂ reduction system according to claim 1 of the present invention for collecting and sequestering underwater plankton collects the plankton that has absorbed marine CO ₂ together with seawater and separates the water to separate the plankton. Recovery means for reducing the CO ₂ partial pressure of seawater, and isolation means for isolating the plankton by sending the plankton recovered by the recovery means into the ground.

In the present invention according to claim 1, plankton is recovered by the recovery means, so that plankton in a state where CO ₂ is taken in by recovery is recovered to reduce the CO ₂ partial pressure of seawater and absorb CO ₂ . The collected plankton is sent to the ground by the isolation means and isolated. Therefore, it is possible to reduce the CO ₂ reliably.

  Plankton is a general term for phytoplankton in the sea and zooplankton that eat phytoplankton. The underground is a general term for the underground of the land and the submarine substratum, and includes existing holes such as wells withered water, holes drilled for oil fields, and the like.

  As a collecting means, a filter member that separates phytoplankton or zooplankton from seawater is used, or a flocculant is added to seawater containing phytoplankton or zooplankton to form a floc, and dehydration is performed to separate and recover plankton. Can be used.

Further, since the recovered plankton is in a slurry state and is difficult to transport with a normal pump, it is preferable to apply a Mono pump for transporting the recovered plankton as the isolation means. As a result, plankton is easily transported by the MONO pump and is isolated in the ground and on the seabed. By isolating the plankton into the submarine underlayer, CCS (CO ₂ submarine storage) technology can be applied.

Then, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 2, in CO ₂ reduction system according capture and sequestration of sea plankton according to claim 1, wherein the collecting means, capturing with seawater A ciliated filtration member is provided for separating the collected plankton.

  In this invention which concerns on Claim 2, since a plankton is divided by a cilia-like filtration member, a plankton can be collect | recovered easily.

Moreover, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 3, in CO ₂ reduction system according capture and sequestration of sea plankton according to claim 2, wherein the recovery means is provided in the marine vessel The plankton is collected together with seawater during the navigation of the ship, and the plankton is collected and collected by the filtering member, and the plankton separated during the berth of the ship is separated into the ground by the isolating means. It is characterized by doing.

  In this invention which concerns on Claim 3, plankton is collect | recovered during navigation of a ship, and the collect | recovered plankton can be isolated in the ground while anchoring.

Moreover, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 4, in CO ₂ reduction system according capture and sequestration of sea plankton according to claim 3, the CO ₂ the vessel when sailing a ship released into the atmosphere, and isolated ground to recover the plankton from which CO ₂ has been absorbed by the CO ₂ of the plankton that capture and sequestration, relative to CO ₂ discharged to the atmosphere during sailing It is characterized by decreasing to.

State according the present invention according to claim 4, in which the CO ₂ absorbed by the plankton that capture and sequestration, CO ₂ is vented to the atmosphere is relatively decreased in sailing, reduced the CO ₂ to release into the atmosphere It is possible to navigate the ship with the above, and it is possible to make the ship with greatly reduced damage to the environment.

Moreover, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 5, in CO ₂ reduction system according capture and sequestration of sea plankton as claimed in any one of claims 4 And marine fertilizing means for promoting the growth of the plankton.

With the present invention according to claim 5, the marine fertilization means can increase the production of phytoplankton, it is possible to increase the CO ₂ to capture and sequestration to promote the absorption of underwater CO _2. Applying fertilizer that increases phytoplankton by adding iron compounds or nitric acid, ammonia and phosphoric acid, which are trace nutrients, and fertilization that increases phytoplankton by supplying deep nutrients to the sea surface can do.

In addition, the CO ₂ reduction system according to claim 6 according to the present invention for collecting and sequestering underwater plankton is the CO ₂ reduction system according to any one of claims 1 to 5, wherein the CO _{2 is} reduced due to underwater plankton recovery and sequestration. The underground to which the plankton is sent is a test well or a waste oil well.

With the present invention according to claim 6, it is possible to isolate the plankton that has absorbed CO ₂ in the exploratory wells or waste oil wells, it is possible to isolate the CO ₂ to an existing deep underground site, to isolate the CO ₂ There is no need to drill new holes.

Moreover, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 7, in CO ₂ reduction system according capture and sequestration of sea plankton as claimed in any one of claims 5 The underground where the plankton is sent is an aquifer.

With the present invention according to claim 7, plankton that has absorbed CO ₂ is groundwater in underground infiltration layer can be isolated in aquifers is saturated.

Moreover, CO ₂ reduction system according capture and sequestration of sea plankton of the present invention according to claim 8, in CO ₂ reduction system according capture and sequestration of sea plankton as claimed in any one of claims 5 The underground to which the plankton is sent is an undersea ground layer.

In the present invention according to claim 8, plankton that has absorbed CO ₂ can be isolated in submarine underlayer, it is possible to apply the technology of CCS (Subseafloor storage of CO _2).

CO ₂ reduction system according capture and sequestration of sea plankton of the present invention, it is possible to reliably reduce the CO ₂ by capture and sequestration plankton that has absorbed CO _2.

Is a schematic diagram of a CO ₂ reduction system according capture and sequestration of sea plankton according to an embodiment of the present invention. It is a conceptual diagram of a cilia-like filtration member. It is a schematic block diagram of the other Example. It is a schematic block diagram of the other Example. It is a schematic block diagram of the other Example. It is a schematic block diagram of a marine fertilization means. It is explanatory drawing of underground isolation. It is explanatory drawing of underground isolation. It is an explanatory view of the operation status of the CO ₂ reduction system.

The outline of the CO ₂ reduction system will be described with reference to FIGS. FIG. 1 is a schematic configuration for systematically explaining a CO ₂ reduction system by collecting and sequestering submarine plankton according to an embodiment of the present invention. FIG. 2 shows a cilia-like filter member for separating phytoplankton. In particular, the appearance of a whale beard-shaped filter member forming a comb-like beard plate is schematically shown.

As shown in FIG. 1, phytoplankton 1 (including zooplankton that eats phytoplankton) as a plankton responsible for photosynthesis inhabits (proliferates) in a state of absorbing CO ₂ in the sea, and is an area where phytoplankton 1 inhabits. Seawater 2 is pumped up by a pump or the like (not shown) and put into the collection container 3. The collection container 3 is provided with a cilia-like filtration member 4 that scrapes the phytoplankton 1 (collection means). The seawater 2 after the phytoplankton 1 is sorted by the filtering member 4 is stored in the lower part of the collection container 3 and discharged into the sea.

  As shown in FIG. 2, the filtering member 4 is a whale beard-shaped filtering member 4 that forms a comb-like beard plate, and filters the seawater 2 at the portion of the whale whiskers to capture only the phytoplankton 1. That is, phytoplankton is captured in the same state as when a whale captures krill at the beard. By using the cilia-like filtration member 4 that scrapes the phytoplankton 1 collected together with the seawater 2, the phytoplankton 1 can be easily recovered.

  In the embodiment described above, the seawater 2 is pumped up and the phytoplankton 1 is captured by the filtration member 4. However, it is also possible to tow the filtration member 4 by a ship or the like and directly capture the phytoplankton 1 in the sea.

On the other hand, as shown in FIG. 1, the phytoplankton 1 separated by the filtering member 4 is recovered in a state in which CO ₂ is absorbed and is sent to the ground 6 by the isolation means 5, and the phytoplankton 1 Is sequestered in the ground with absorbed CO ₂ . As the underground, an oil field gap (waste oil well) after the fuel is taken out, an oil field gap (trial well) after the oil field trial, etc. can be applied.

That is, as the ground, a place where the phytoplankton 1 in which CO ₂ is absorbed is not decomposed without being exposed to the atmosphere, or even if it is decomposed, it does not come out on the ground is applied. By applying an oil field gap or the like, CO ₂ can be sequestered in the ground using the existing ground gap.

  The collection of the phytoplankton 1 is performed by collecting and crushing the filtration member 4 on which the phytoplankton 1 is captured, and sending it to the ground by the isolation means 5. It is also possible to separate the phytoplankton 1 from the filtration member 4 by air or the like, and send the separated phytoplankton 1 into the ground by the separating means 5.

  As the separating means 5, for example, a monono pump or a screw-like screw that rotates an eccentric rotor inside a stator whose cross-sectional shape continuously changes in the axial direction and pumps a slurry-like conveyed product in the axial direction. A screw pump or the like that rotates and transports the slurry-like conveyed material in the axial direction can be applied.

In the CO ₂ reduction system described above, the phytoplankton 1 is separated and captured by the filtering member 4, and the recovered phytoplankton 1 is isolated in the ground (such as oil field voids) together with the absorbed CO _2. The CO ₂ can be directly sequestered without releasing the CO ₂ taken into the plankton 1 into the seawater 2. Further, it is possible to reduce the CO ₂ partial pressure of the sea water 2 in the sea.

Therefore, it is possible to reliably reduce the CO ₂ by capture and sequestration phytoplankton 1 that has absorbed CO _2. Moreover, the seawater 2 in the sea where the partial pressure has decreased can absorb CO ₂ in the atmosphere, and an increase in the concentration of CO _{2 in} the atmosphere can be suppressed. That is, it becomes possible to make the CO ₂ reduction by the phytoplankton 1 practical.

Another embodiment of the CO ₂ reduction system will be described with reference to FIGS. FIG. 3 shows a collecting means using a plankton net, FIG. 4 shows a collecting means using a plate filter, and FIG. 5 shows a collecting means using a flocculant. In addition, the same code | symbol is attached | subjected to the same member as the member shown in FIG.

  The collection means using the plankton net will be described.

  As shown in FIG. 3, seawater 2 in a region where phytoplankton 1 inhabits is pumped up by a pump or the like (not shown) and put into a collection container 11. The collection container 11 is provided with a partition of the plankton net 12, and the phytoplankton 1 is separated on the plankton net 12 by passing the introduced seawater 2 through the plankton net 12. The seawater 2 after the phytoplankton 1 is separated by the plankton net 12 is stored in the lower part of the collection container 11 and discharged into the sea.

Then, the phytoplankton 1 separated by the plankton net 12 is sent to the land 6 by the isolation means 5 while the CO ₂ is absorbed, as in the CO ₂ reduction system shown in FIG. Plankton 1 is sequestered in the ground with absorbed CO ₂ . For this reason, CO ₂ can be directly sequestered without releasing CO ₂ taken into the phytoplankton 1 into the seawater 2. Further, it is possible to reduce the CO ₂ partial pressure of the sea water 2 in the sea. Therefore, it is possible to reliably reduce the CO ₂ by capture and sequestration phytoplankton 1 that has absorbed CO _2. Moreover, the seawater 2 in the sea where the partial pressure has decreased can absorb CO ₂ in the atmosphere, and an increase in the concentration of CO _{2 in} the atmosphere can be suppressed.

  In the embodiment described above, the seawater 2 is pumped up and the phytoplankton 1 is separated by the plankton net 12, but it is also possible to tow the plankton net 12 by a ship or the like and directly capture the phytoplankton 1 in the sea.

  The collection means using a plate filter will be described.

  As shown in FIG. 4, the seawater 2 in the region where the phytoplankton 1 inhabits is pumped up by a pump or the like (not shown) and introduced into the inlet 16 of the collection container 15. A filter plate 17 is provided on the upper surface of the opening of the collection container 15, and the filter plate 17 is inclined downward from a portion corresponding to the input port 16. A collection unit 18 is provided on the side (inclined lower side) of the filter plate 17 opposite to the insertion port 16.

  The phytoplankton 1 is separated by the filter plate 17 when the seawater 2 is input to the input port 16. The phytoplankton 1 separated on the filter plate 17 flows down on the filter plate 17 and is collected by the collection unit 18. In order to make the phytoplankton 1 flow easily on the filter plate 17, water (seawater) is sprayed in a shower shape as necessary. The seawater 2 after the phytoplankton 1 is separated is stored in the lower part of the collection container 15 and discharged into the sea.

The phytoplankton 1 recovered by the recovery unit 18 is sent to the ground 6 by the isolation means 5 while the CO ₂ is absorbed, as in the CO ₂ reduction system shown in FIG. Is sequestered in the ground with absorbed CO ₂ . For this reason, CO ₂ can be directly sequestered without releasing CO ₂ taken into the phytoplankton 1 into the seawater 2. Further, it is possible to reduce the CO ₂ partial pressure of the sea water 2 in the sea. Therefore, it is possible to reliably reduce the CO ₂ by capture and sequestration phytoplankton 1 that has absorbed CO _2. Moreover, the seawater 2 in the sea where the partial pressure has decreased can absorb CO ₂ in the atmosphere, and an increase in the concentration of CO _{2 in} the atmosphere can be suppressed.

  A collecting means using a flocculant will be described.

  As shown in FIG. 5, the seawater 2 in the region where the phytoplankton 1 inhabits is pumped up by a pump or the like (not shown) and put into the collection container 21. A flocculant is supplied to the collection container 21, and an aggregate 22 containing the phytoplankton 1 is formed in the collection container 21. The agglomerate 22 is dehydrated by the dehydrating means 23 and the phytoplankton 1 is separated.

The phytoplankton 1 dehydrated and separated by the dewatering means 23 is sent to the ground 6 by the separating means 5 while the CO ₂ is absorbed, as in the CO ₂ reduction system shown in FIG. 1 is sequestered in the ground with absorbed CO ₂ . For this reason, CO ₂ can be directly sequestered without releasing CO ₂ taken into the phytoplankton 1 into the seawater 2. Further, it is possible to reduce the CO ₂ partial pressure of the sea water 2 in the sea. Therefore, it is possible to reliably reduce the CO ₂ by capture and sequestration phytoplankton 1 that has absorbed CO _2. Moreover, the seawater 2 in the sea where the partial pressure has decreased can absorb CO ₂ in the atmosphere, and an increase in the concentration of CO _{2 in} the atmosphere can be suppressed.

Based on FIGS. 6 to 8, a specific application situation of the above-described CO ₂ reduction system will be described.

  Fig. 6 outlines the means of fertilizing the ocean by pumping deep water to the surface, Fig. 7 shows the state where phytoplankton is isolated from the ship to the ground (waste oil well), and Fig. 8 shows the seabed from the ship. The state of isolating phytoplankton is shown in the ground (undersea layer).

As shown in FIG. 6, the CO ₂ reduction system 30 is mounted on a ship 31 that sails on the sea. In order to increase the production of phytoplankton 1, marine fertilizer 32 for fertilizing the surface of the ocean is used. The ocean fertilizer 32 includes a pumping pipe 25 that reaches the surface of the deep water 33 from the surface layer. Heat is received from warm seawater outside the pumping pipe 25 (indicated by white arrows in the figure), the deep water 33 in the pumping pipe 25 is warmed, and the deep water 33 is pumped to the surface by buoyancy.

  That is, the deep water 33 is pumped to the surface layer and fertilized by the temperature difference and salinity difference of the ocean. It is also possible to directly pump the deep water 33 using a drive pump or the like.

Production of the phytoplankton 1 is increased by fertilizing the surface layer of the ocean by the ocean fertilizer 32. The ship 31 is navigated to the fertilized sea area, or the marine fertilizer 32 is transported by the ship 31 and fertilization is performed in a desired sea area. In the sea area where many phytoplanktons 1 are produced by fertilization, the phytoplanktons 1 can be introduced into the CO ₂ reduction system 30 of the ship 31 together with the seawater 2.

  In addition, the deep-sea water 33 can be pumped up by the ocean fertilizer 32, and iron (iron compound) can be sprayed to supplement the iron content of seawater, and the surface layer of the ocean can be fertilized to grow the phytoplankton 1. Moreover, it can replace with the ocean fertilization means 32 and can also apply fertilizer which adds an iron compound, nitric acid, ammonia, and phosphoric acid, and increases the phytoplankton 1. FIG.

As shown in FIG. 7, the phytoplankton 1 collected by the ship 31 is transported to the land 6 by the navigation of the ship 31 and is sequestered in the waste oil well 51 in the ground together with the absorbed CO ₂ . It can be isolated from the land 6 through a pipeline or the like to the aquifer where the groundwater in the infiltration layer in the ground is saturated.

As shown in FIG. 8, the phytoplankton 1 collected by the ship 31 is transported to a predetermined sea area by the navigation of the ship 31 and is isolated to the seabed underlayer 53 of the seabed 36 by the undersea pipeline 52 or the like. By isolating the phytoplankton 1 that has absorbed CO ₂ in the seabed underlayer 53, there is no need to consider salt damage such as the wall surface of the seabed underlayer 53.

As another application example of the CO ₂ reduction system, it is also possible to apply a phenomenon in which the phytoplankton 1 naturally grows depending on the season or a phenomenon in which red tide occurs due to nature.

In other words, in the seas near Japan, the seawater is agitated during the winter due to the influence of seasonal winds, etc., or the nutrients are carried to the surface of the ocean due to the influence of the updraft caused by the current flowing along the shore. A phenomenon (phytoplankton bloom) in which phytoplankton 1 grows spontaneously and explosively as a result of the increased photosynthesis activity of phytoplankton 1 in spring is known. By catching such a phenomenon, when the phytoplankton 1 naturally proliferates, the ship 31 is navigated according to the sea area, and the phytoplankton 1 that proliferated naturally is put into the CO ₂ reduction system 30 of the ship 31 together with the seawater 2. be able to. Similarly, the ship 31 can be navigated to the sea area of the red tide generated by nature, and can be thrown into the CO ₂ reduction system 30 of the ship 31 together with the seawater 2.

By applying a phytoplankton bloom or red tide generation phenomenon, naturally grown plankton can be recovered and CO ₂ can be reduced.

Although the application example described above assumes that the ship 31 is navigated for the purpose of collecting phytoplankton, it is also possible to collect phytoplankton growing on the regular route. Based on FIG. 9, an example of a specific operation status of the CO ₂ reduction system 30 by the ship 31 navigating the regular route will be described.

The ship 31 sails on the regular route toward the destination while releasing CO ₂ into the atmosphere. At this time, regardless of the presence or absence of phytoplankton 1, the seawater 2 is pumped and drained (a). When overlap waters and regular routes phytoplankton are growing, phytoplankton 1 is recovered by the CO ₂ reduction system 30 by seawater 2 is pumped, will be only seawater 2 Sail is drained, the route The partial pressure of CO _{2 in} the seawater 2 in the sea area of the water is reduced, and CO ₂ in the atmosphere is absorbed into the sea (b).

In the process of sailing from the sea area where the phytoplankton is growing to the destination, the seawater 2 is pumped and drained with or without the phytoplankton 1, and the ship 31 releases CO ₂ into the atmosphere. Navigate (c). The phytoplankton 1 that has absorbed CO ₂ in the ground land 6 is isolated destination (Shore) (d).

  If the vessel 31 can evaluate the growth of phytoplankton 1, the seawater 2 is pumped and drained only in the sea where the phytoplankton 1 is proliferating and the regular route, and the seawater is used in other routes. It is also possible to stop pumping and draining of No. 2.

As a result, CO ₂ is released into the atmosphere during navigation on regular routes (a, c), while CO ₂ in the atmosphere is recovered by collecting phytoplankton 1 in the sea area where phytoplankton 1 is proliferating. The phytoplankton 1 that has been absorbed into the sea (b) and absorbed CO ₂ is sequestered together with CO _{2 in} the land 6 of the destination land (d). Therefore, the CO ₂ phytoplankton 1 which is isolated is recovered, CO ₂ is relatively reduced, which is discharged into the atmosphere in order to navigate the regular route.

Accordingly, the CO ₂ absorbed by the collected and sequestered phytoplankton 1 relatively reduces the CO ₂ discharged from the ship 31 to the atmosphere while navigating the regular route, and reduces the CO ₂ released into the atmosphere. In this state, the ship 31 can be navigated, and the ship 31 with greatly reduced damage to the environment can be obtained.

The present invention can be used in the industrial field of a system that reduces CO ₂ by collecting and isolating phytoplankton and zooplankton in the sea.

1 phytoplankton 2 seawater 3,11,15,21 collecting container 4 filter member 5 isolation means 6 land 12 plankton net 16 inlet 17 filter plate 18 recovery unit 22 aggregates 23 dewatering unit 30 CO ₂ abatement 31 vessels 32 ocean fertilization Means 33 Deep sea water 36 Sea bottom 51 Waste oil well 52 Undersea pipeline 53 Subsea bed

Claims (8)

A collection means for collecting plankton that absorbs marine CO ₂ together with seawater and separating the water to collect the plankton, thereby reducing the CO ₂ partial pressure of seawater;
A CO ₂ reduction system by collecting and isolating underwater plankton, comprising: isolating means for isolating the plankton by sending the plankton collected by the collecting means to the ground. In the CO ₂ reduction system by recovery and sequestration of submarine plankton according to claim 1,
The recovery means includes a cilia-like filtration member that separates the plankton collected together with seawater. A CO ₂ reduction system by collecting and sequestering underwater plankton. In the CO ₂ reduction system by recovery and sequestration of submarine plankton according to claim 2,
The recovery means is provided in a ship,
The plankton is collected together with seawater during the navigation of the ship, and the plankton is separated and collected by the filtering member, and the plankton separated during the berth of the ship is isolated to the ground by the isolation means. CO ₂ reduction system by collecting and sequestering underwater plankton. In the CO ₂ reduction system by recovery and sequestration of submarine plankton according to claim 3,
The ship is a ship that emits CO ₂ into the atmosphere during navigation,
Sea plankton isolated underground by collecting the plankton from which CO ₂ has been absorbed, characterized in that to relatively reduce the CO ₂ to be discharged to the atmosphere during sailing by CO ₂ of the plankton that capture and sequestration CO ₂ reduction system by collecting and sequestering water. In the CO ₂ reduction system by the recovery and sequestration of submarine plankton according to any one of claims 1 to 4,
A CO ₂ reduction system by collecting and sequestering underwater plankton, comprising marine fertilization means for promoting the growth of plankton. In the CO ₂ reduction system according to any one of claims 1 to 5 by recovery and sequestration of submarine plankton,
A CO ₂ reduction system by collecting and sequestering underwater plankton, characterized in that the underground where the plankton is sent is a test well or a waste oil well. In the CO ₂ reduction system according to any one of claims 1 to 5 by recovery and sequestration of submarine plankton,
A CO ₂ reduction system by collecting and sequestering underwater plankton, wherein the ground where the plankton is sent is an aquifer. In the CO ₂ reduction system according to any one of claims 1 to 5 by recovery and sequestration of submarine plankton,
CO ₂ reduction system according capture and sequestration of sea plankton, characterized in that the ground that the plankton is sent is a sub-seabed layers.

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