JP2016000020A - System for growing algae and method for growing algae - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for growing algae and a method for growing algae that can grow algae efficiently.SOLUTION: A system for growing algae includes: a plurality of tanks 10 in which algae are grown inside thereof, respectively; a plurality of transfer pipes 22 which are provided among the plurality of tanks 10 and connect the tank 10 of an upstream side and the tank 10 of a downstream side so that grown algae M flows down from the tank 10 of the upstream side to the tank 10 of the downstream side with fluid W containing at least one of nutrient solution and water; a fluid supply pipe 56 which supplies the fluid W to at least a tank 10A of the most upstream; a plurality of aeration devices which are adjusted so that when air for aeration is supplied to one tank 10 of the pair of tanks 10, an amount of air, which does not cause aeration S, is supplied to the other tank 10; a recovery tank 62 which recovers the fluid W and the algae M flowing out from the most downstream tank 10; and a screen which separates the fluid W and the algae M which are recovered in the recovery tank 62.

Description

  The present invention relates to an algae growing system and an algae growing method.

  As a conventional method for growing algae, Patent Literature 1 discloses a cultivation method in which a plurality of perforated cages are floated in a cultivation tank and ananaosa mutant (algae) is cultivated in the perforated cages. Moreover, as a conventional algae growing device, Patent Literature 2 discloses a culture device in which a plurality of culture tanks are arranged in a multi-stage manner, and seaweeds (algae) are cultured in the culture tank.

JP-A-7-203789 JP 2012-213379 A

  In the cultivation method described in Patent Document 1, a circulating seawater flow is formed in the cultivation tank, but the water flow in each perforated basket tends to vary, and the growth of algae varies. Moreover, in the aquaculture apparatus described in Patent Document 2, since the height of the entire aquaculture apparatus increases in proportion to the number of aquaculture tanks, it is necessary to pump water up to a high position with a pump or the like when water is supplied to the aquaculture tank. is there. Moreover, it is difficult for sunlight to hit the lower culture tank, and the growth of algae varies.

  In view of the above facts, an object of the present invention is to provide an algae growing system and an algae growing method capable of efficiently growing algae.

  The algae growing system according to claim 1 of the present invention is provided between each of the plurality of tanks in which the algae are grown, and from the upstream tank to the downstream tank. A plurality of transfer pipes connecting the upstream tank and the downstream tank so that the algae grown together with a fluid containing at least one of nutrient solution and water flow down, and at least the most upstream tank A plurality of aeration apparatuses including a fluid supply pipe for supplying fluid and a single pump for alternately supplying aeration air to a predetermined pair of tanks in the plurality of tanks, When supplying air for aeration to one tank, adjustment is made so that an amount of air that does not cause aeration is supplied to the other tank. Comprising a number of aeration devices, a recovery tank for collecting the fluid and the algae has flowed from the most downstream tank, and a screen separating the recovered the fluid and the algae to the collection tank.

  According to the algae growing system having the above configuration, the transfer pipe that causes the algae grown together with the fluid to flow from the upstream tank to the downstream tank, the recovery tank that collects the fluid and algae, the fluid and the algae And a separating screen. Therefore, the algae grown in the plurality of tanks can be collected together.

  The aeration apparatus can supply air to a pair of tanks with a single pump. Therefore, the number of pumps can be reduced. Further, since the air is supplied and pressurized in such a manner that the other tank does not generate aeration constantly, the time lag due to the water pressure until the air is supplied can be reduced.

  An algae growing system according to a second aspect of the present invention is the algae growing system according to the first aspect, wherein the tanks are semitransparent cylindrical containers arranged at intervals.

  According to the algae growing system having the above configuration, since the tanks are semi-transparent cylindrical containers arranged at intervals, a sufficient amount of sunlight hits the tanks evenly. Therefore, the growth conditions of the algae can be made uniform, and variations in growth hardly occur.

  The algae growing system according to claim 3 of the present invention is the algae growing system according to claim 1 or 2, wherein one block is constituted by the plurality of tanks, and a plurality of the blocks are formed. Has been.

  According to the algae growing system having the above configuration, the algae can be collected for each block by dividing the plurality of tanks into one block.

  The algae growing system according to claim 4 of the present invention is the algae growing system according to claim 3, wherein, in the block, the plurality of tanks are arranged in parallel and arranged in parallel from upstream to downstream. It arrange | positions so that the number of the said tanks of the row | line | column arranged may increase, The said upstream tank and the said downstream tank are connected with the said transfer pipe.

  According to the algal growth system having the above-described configuration, a plurality of tanks are arranged in parallel, and the number of tanks in a row arranged in parallel from upstream to downstream is increased. Therefore, when the algae flow down from the upstream to the downstream, the algae can be prevented from clogging in the transfer pipe. Moreover, if upstream and downstream are reversely arranged and integrated for each block, the space for installing the tank can be reduced.

  An algae growing system according to claim 5 of the present invention is the algae growing system according to claim 4, wherein the aeration apparatus is connected to the air blower for blowing air and the pair of blocks connected to the air blower. When two air supply pipes that alternately supply air, a connection pipe that connects the two air supply pipes, and the connection pipe are provided with air supplied to one of the air supply pipes And an air adjusting valve whose opening is adjusted so that an amount of air that does not generate aeration is supplied to the other air supply pipe.

  According to the algae growing system with the above configuration, two air supply pipes are connected by a connecting pipe, and air is supplied to one air supply pipe by adjusting the opening of an air adjusting valve provided in the connecting pipe. In this case, an amount of air that does not generate aeration can be supplied to the other air supply pipe.

  In the method for growing algae according to claim 6 of the present invention, a fluid containing at least one of a nutrient solution and water is supplied into a plurality of tanks, and one of a predetermined pair of tanks in the plurality of tanks When supplying air for aeration to the tank, the aeration apparatus is switched so that an amount of air that does not cause aeration is supplied to the other tank, and algae is grown in each of the tanks. At the same time, the grown algae are allowed to flow down from the upstream tank to the downstream tank, flow out of the most downstream tank and collected, and the collected algae and the fluid are separated.

  According to the method for growing algae having the above-described configuration, the algae grown together with the fluid are allowed to flow down from the upstream tank to the downstream tank, are discharged from the most downstream tank, and are collected to separate the algae and the fluid. Thus, the algae grown in the plurality of tanks can be collected together.

  In addition, since the air pressure is constantly supplied to the other tank so as not to cause aeration, when the aeration apparatus is switched and air for aeration is supplied to the other tank, the air is supplied. Time lag due to water pressure can be reduced.

  A method for growing algae according to claim 7 of the present invention is the method for growing algae according to claim 6, wherein a plurality of the tanks are arranged in parallel in one block constituted by the plurality of tanks. In addition, the tanks are arranged so that the number of the tanks arranged in parallel from upstream to downstream is increased, and the algae are collected and transferred from the upstream tank to the downstream tank.

  According to the algae growing system having the above-described configuration, a plurality of tanks are divided into one block and arranged in parallel, and arranged so that the number of the tanks in the row arranged in parallel from upstream to downstream increases. Yes. Therefore, when the algae flow down from the upstream to the downstream, the algae can be prevented from clogging in the transfer pipe.

  The algae growing method according to claim 8 of the present invention is the algae growing method according to claim 6 or 7, wherein the aeration apparatus is alternately arranged in two blocks each constituted by the plurality of tanks. To supply air.

  According to the algae growing system having the above-described configuration, by dividing a plurality of tanks into one block, air can be supplied together for each block.

  ADVANTAGE OF THE INVENTION According to this invention, the cultivation system of algae and the cultivation method of algae which can grow algae efficiently can be provided.

It is the whole top view showing the cultivation system of algae concerning the embodiment of the present invention. It is the elements on larger scale which showed the fluid supply structure in the cultivation system of the algae of FIG. It is the elements on larger scale which showed the air supply structure in the cultivation system of the algae of FIG. It is a partial side sectional view of the algal growth system of FIG. It is side surface sectional drawing which shows the collection | recovery unit of the algal growth system.

  An example of the algal growth system according to the embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the growing system according to the present embodiment includes a plurality of tanks 10, a plurality of over water receiving members 12, a plurality of recovery units 54 each including a recovery tank 62 and a water tank 14, and a plurality of aerations. And a device 16.

  The tank 10 is a semi-transparent bottomed cylindrical container made of polyethylene or the like in which the algae M is grown, and a plurality of tanks 10 are arranged at intervals. In addition, the plurality of tanks 10 are divided into one block 20 every ten, and in each block 20, the number of tanks 10 gradually increases from the top to the bottom. It is arranged in a pyramid shape.

  Specifically, in each block 20, one tank 10 is arranged in the first tank row 10D of the first row, and two tanks 10 are arranged in parallel in the second tank row 10C of the second row. Three tanks 10 are arranged in parallel in the third tank row 10B in the row, and four tanks are arranged in parallel in the fourth tank row 10A in the fourth row. The plurality of blocks 20 are arranged so that the directions of the pyramids are staggered.

  An over water receiving member 12 is provided in the vicinity of the tank 10 of the first tank row 10D of each block 20 for storing the fluid W when the water level of the fluid W in the tank exceeds a certain reference. It has been.

  Further, a recovery unit 54 that recovers the fluid W including at least one of nutrient solution and water flowing down from the tank 10 and supplies the fluid W to the tank 10 again, and an aeration device 16 that supplies air for aeration into the tank 10, One is provided for each of the plurality of blocks 20.

  As shown in FIG. 2, the first to fourth tank rows 10D to 10A of the block 20 are connected in series by a transfer pipe 22 made of vinyl chloride. Specifically, the upper side surface of the tank 10 of the first tank row 10D and the upper side surface of the tank 10 of the adjacent second tank row 10C are connected by the first transfer pipe 22D.

  Further, the upper portion of the side surface opposite to the connecting portion of the first transfer pipe 22D in the tank 10 of the second tank row 10C and the upper portion of the side surface of the tank 10 of the adjacent third tank row 10B are connected by the second transfer pipe 22C. Has been.

  Further, the upper portion of the side surface opposite to the connecting portion of the second transfer pipe 22C in the tank 10 of the third tank row 10B and the upper portion of the side surface of the tank 10 of the adjacent fourth tank row 10A are connected by the third transfer pipe 22B. Has been.

  In addition, one end of the fourth transfer pipe 22A is connected to the upper part of the side surface opposite to the connection portion of the third transfer pipe 22B in the tank 10 of the fourth tank row 10A, and the other end of the fourth transfer pipe 22A is It is connected to the recovery tank 62 of the recovery unit 54.

  As shown in FIG. 5, the recovery unit 54 includes a recovery tank 62 into which the algae M and fluid W flow, a screen 46 that separates the algae M and fluid W, and a water tank 14 that stores the fluid W separated by the screen 46. And.

  The recovery tank 62 is connected to the other end of the fourth transfer pipe 22A, one end of which is connected to the tank 10 of the fourth tank row 10A, and the other end of the recovery pipe 48, one end of which is connected to the screen 46. Yes. The recovery pipe 48 is provided with a recovery pump 50 that pumps the algae M and fluid W in the recovery tank 62 to the screen 46.

  A side surface of the screen 46 is connected to a pumping pipe 52 that pumps the algae M separated in the screen 46. Further, a discharge pipe 64 for transferring the fluid W separated in the screen 46 to the water tank 14 disposed below the screen 46 is connected to the bottom surface of the screen 46. One end of a fluid supply pipe 56 is disposed in the water tank 14, and a circulation pump 58 that pumps up the fluid W in the water tank 14 is provided in the fluid supply pipe 56.

  2 and 4, the other end of the fluid supply pipe 56 is arranged on the upper part of each tank 10 of the block 20, and the fluid W recovered by the recovery unit 54 is supplied again to each tank 10. can do. A fluid supply pipe valve 60 is provided at the other end of the fluid supply pipe 56.

  One end of an over water receiving pipe 23 is connected to the upper portion of the side surface of the tank 10 of the first tank row 10D opposite to the connecting portion of the first transfer pipe 22D. The end is connected to the over water receiving member 12.

  As shown in FIG. 4, the over water receiving member 12 is a bag-like member, and is attached to the over water receiving pipe 23 by a band 12A. The over water receiving pipe 23 is provided with an over water receiving valve 24.

  As shown in FIG. 3, the aeration apparatus 16 includes one air pump 32 that supplies air and two sets of aeration units 18 having the same structure. Each aeration unit 18 includes an air blower 30 that blows out air supplied by an air pump 32, and two air supply pipes 34 having one ends connected to the air blower 30. In FIG. 3, only one set of aeration unit 18 is shown.

  Each of the two air supply pipes 34 is provided with an air supply pipe valve 36. Further, a connecting pipe 38 that connects the air supply pipes 34 is connected to the downstream side of the air supply pipe valve 36 of the two air supply pipes 34. The connection pipe 38 is provided with an air adjustment valve 40 so that the ratio of the amount of air flowing through the two air supply pipes 34 can be adjusted. The diameter of the connecting pipe 38 is smaller than the diameter of the air supply pipe 34.

  The two air supply pipes 34 extend between two adjacent blocks 20, and four branch pipes 42 are connected to each of the air supply pipes 34. Moreover, the branch pipe 42 is extended to the upper part of each tank 10, as shown in FIG.

  A plurality of air nozzles 44 are connected to the branch pipe 42. The air nozzle 44 is provided for each tank 10 and is inserted into the tank 10 from the top of the tank 10 and extends to the bottom of the tank 10. A plurality of holes 44A are formed at the tip of the air nozzle 44, and aeration (many fine bubbles) S is generated from the holes 44A.

  Next, an example of the algae growing method using the algae growing system will be described.

  First, the nutrient solution is added to the water in the water tank 14, and the fluid W containing the nutrient solution is pumped up by the circulation pump 58 and supplied from the fluid supply pipe 56 into each tank 10. At this time, the supply amount of the fluid W is adjusted by the fluid supply pipe valve 60. Also, seeds and seedlings of algae M are introduced into each tank 10.

  Thereafter, the air pump 32 of the aeration device 16 is operated to supply air to the air nozzle 44 through the air blower 30, the air supply pipe 34, and the branch pipe 42, and aeration S is generated from the hole 44A of the air nozzle 44 arranged at the bottom of the tank 10. Let

  Further, a water flow is generated in the tank 10 by the aeration S. The supply of air to each tank 10 by the aeration device 16 is performed for each block 20, and air is alternately supplied to the two blocks 20.

  Specifically, when one air supply pipe valve 36 is opened and aeration air is supplied from the air blower 30 to one air supply pipe 34, the other air supply pipe 34 side air supply pipe valve is provided. 36 is closed. On the contrary, when aeration air is supplied to the other air supply pipe 34, the other air supply pipe valve 36 is opened, and the air supply pipe valve 36 on the one air supply pipe 34 side is opened. Closed.

  When air is supplied to one of the air supply pipe valves 36, the air adjustment valve 40 provided in the connection pipe 38 is adjusted to adjust the opening of the other air supply pipe valve 36. An amount of air that does not cause the generation of air is supplied.

  The amount that does not generate aeration S is an amount that does not generate continuous fine bubbles in the tank 10. Specifically, the opening of the air adjustment valve 40 is adjusted so that 10% of the amount of air supplied to one air supply pipe valve 36 is also supplied to the other air supply pipe valve 36. The

  After the algae M are grown in the tank 10, when the water level in the tank 10 is made higher than the position of the transfer pipe 22, the fluid W in the tank 10 flows down through the transfer pipe 22. At this time, since the algae M are rolled up near the water surface by the water flow caused by the aeration S, the algae M also flows down along with the fluid W through the transfer pipe 22.

  The fluid W and algae M that have flowed from the tank 10 in the first tank row 10D to the tank 10 in the fourth tank row 10A through the tanks 10 in the second and third tank rows 10C and 10B pass through the fourth transfer pipe 22A. And flows out to the recovery tank 62 of the recovery unit 54.

  The fluid W and the algae M that have flowed into the collection tank 62 are pumped up by the collection pump 50 and transferred into the screen 46 through the collection pipe 48. In the screen 46, the fluid W and the algae M are separated, and the separated algae M are pumped from the pumping device in the screen 46 to the outside through the pumping pipe 52.

  Further, the fluid W separated in the screen 46 is stored in the water tank 14. The fluid W in the water tank 14 is supplemented with the nutrient solution again, pumped up by the circulation pump 58, and supplied to each tank 10 through the fluid supply pipe 56.

  When rainwater flows into the tank 10 during the rain or the like and the water level in the tank 10 rises, the over water receiving valve 24 is opened and the over water receiving pipe 23 is over-received. The fluid W in the tank 10 is caused to flow out to the member 12. By temporarily storing the amount of the fluid W increased by the rainwater by the over water receiving member 12, it is possible to prevent the fluid W from overflowing from the upper portion of the tank 10.

  Further, when the over water receiving valve 24 is opened, the supply of air by the aeration device 16 is stopped. Since the water flow due to the aeration S does not occur in the tank 10, the algae M is not rolled up, and the algae M can be prevented from flowing out to the over water receiving member 12 together with the fluid W.

  By repeating the series of steps described above, it is possible to grow the algae M in each tank 10 and collect the grown algae M. In the algae M growing system and the algae M growing method according to the embodiment of the present invention, since each tank 10 is a semi-transparent cylindrical container arranged at intervals, a sufficient amount of sunlight is tanked. Can be applied evenly. Therefore, the growth conditions of the algae M can be made uniform, and variations in growth hardly occur.

  Further, the plurality of tanks 10 are partitioned into blocks 20, and the number of tanks 10 in a row arranged in parallel from upstream to downstream in each block 20 is increased. Therefore, the algae M can be prevented from clogging in the transfer pipe 22 when the algae M in the tank 10 flows down from the upstream to the downstream.

  Moreover, since the air nozzle 44 is provided for each tank 10 and aeration S is generated for each tank 10, oxygen can be evenly supplied to the algae M of each tank 10. Further, since the water flow caused by the aeration S can be generated for each tank 10, the water flow in each tank 10 is less likely to vary.

  Further, the aeration apparatus 16 can supply air to the four blocks 20 by a single air pump 32. Therefore, the number of air pumps 32 can be reduced as compared with a configuration in which one air pump is provided for one block 20.

  Further, when air is supplied to one air supply pipe 34, an amount of air that does not constantly generate aeration S is supplied to the other air supply pipe 34 and pressurized. Therefore, when the aeration apparatus 16 is switched and air for aeration is supplied to the other air supply pipe 34, a time lag due to water pressure can be reduced.

  Moreover, since the transfer pipe 22 is provided in the upper part of the side surface of each tank 10, the algae M wound up on the upper part of the tank 10 by the water flow can be efficiently transferred. Moreover, the algae M in each tank 10 of the first to fourth tank rows 10D to 10A can be caused to flow at a time without providing a valve on each transfer pipe 22.

  In addition, although an example of embodiment was demonstrated about this invention, this invention is not limited to this embodiment, Other various embodiment is possible within the scope of the present invention.

  For example, in the above embodiment, ten tanks 10 are partitioned into one block 20, but any number of tanks 10 may be included in one block 20. Moreover, the shape of the block 20 may not be a pyramid shape in plan view, and may be a shape in which the tanks 10 are arranged in a row.

  The aeration apparatus 16 is configured to supply air alternately for each block 20, but may be configured to supply air alternately for each tank 10.

10 Tank 16 Aeration Device 20 Block 22 Transfer Pipe 30 Air Blower 32 Air Pump (Pump)
34 Air supply pipe 38 Connection pipe 40 Air adjustment valve 46 Screen 56 Fluid supply pipe 62 Recovery tank M Algae S Aeration W Fluid

Claims (8)

A plurality of tanks in which algae are cultivated,
The upstream tank, provided between each of the plurality of tanks, such that the algae grown together with a fluid containing at least one of nutrient solution and water flow from the upstream tank to the downstream tank; A plurality of transfer pipes connected to the downstream tank;
A fluid supply pipe for supplying the fluid to at least the most upstream tank;
A plurality of aeration apparatuses including a single pump for alternately supplying aeration air to a predetermined pair of tanks in the plurality of tanks, each of which supplies aeration air to one tank. A plurality of aeration devices that are adjusted to supply an amount of air that does not cause aeration in the other tank during supply;
A recovery tank for recovering the fluid and the algae flowing out of the most downstream tank;
A screen for separating the fluid recovered from the recovery tank and the algae;
Algae breeding system with   The algae growing system according to claim 1, wherein the tanks are semi-transparent cylindrical containers arranged at intervals.   The algae growing system according to claim 1 or 2, wherein one block is constituted by the plurality of tanks, and a plurality of the blocks are formed.   In the block, the plurality of tanks are arranged in parallel and arranged so that the number of the tanks in a row arranged in parallel from upstream to downstream increases, and the upstream tank and the downstream tank The algae growing system according to claim 3, wherein the algae are connected by the transfer pipe. The aeration apparatus is
An air blower that blows out air;
Two air supply pipes connected to the air blower and alternately supplying air to the pair of blocks;
A connecting pipe connecting the two air supply pipes;
Air adjustment provided in the connecting pipe, and when the air is supplied to one of the air supply pipes, the opening is adjusted so that an amount of air that does not generate aeration is supplied to the other air supply pipe Valves for,
The algae growing system according to claim 4. Supplying a fluid containing at least one of nutrient solution and water into a plurality of tanks;
In the pair of predetermined tanks in the plurality of tanks, when aeration air is supplied to one of the tanks, an aeration apparatus is provided so that an amount of air that does not cause aeration is supplied to the other tank. To grow algae in each tank,
Along with the fluid, the grown algae are allowed to flow down from the upstream tank to the downstream tank, and are discharged from the most downstream tank and collected.
A method for growing algae, wherein the collected algae and the fluid are separated.   In one block constituted by a plurality of tanks, the plurality of tanks are arranged in parallel and arranged so that the number of the tanks in a row arranged in parallel from upstream to downstream increases, and the upstream The method for growing algae according to claim 6, wherein the algae are transferred while being collected from the tank to the downstream tank.   The aeration apparatus according to claim 6 or 7, wherein the aeration apparatus alternately supplies air to two blocks each formed by a plurality of the tanks.

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