JP2006167675A - Algae treatment device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an algae treatment device which performs treatment according to the growth state of individual algae to enable an efficient inactivation treatment. <P>SOLUTION: The algae treatment device inactivates algae floating in water to be treated. The algae treatment device has a separation treatment part 3 for separating gregarious algae G from the water to be treated, introduced into a passage 2 of the water to be treated, opening in the water to be treated, and an inactivation treatment part 4 for electrically treating the water to be treated, having passed through the separation treatment part 3, to inactivate the algae remaining in the water to be treated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an algae treatment apparatus and method for performing various treatments in water by performing discharge or the like in treated water such as lakes, reservoirs, and water tanks.

  As an underwater sterilization method, an electric field treatment method is known in which a voltage lower than the dielectric breakdown voltage of water to be treated is applied between electrodes immersed in the water to be treated. When the above voltage is applied, discharge occurs between the electrodes. It is known that ultraviolet rays and shock waves are generated along with this discharge, and these can be used for various treatments in water.

  For example, Patent Document 1 discloses a technique for preventing adhesion of aquatic organisms such as shellfish and algae that adhere to various underwater facilities such as water intakes and ship bottoms using pulse discharge in water. . In this technique, a pair of discharge electrodes are installed opposite to each other at the attachment position of aquatic organisms in the facility so as to improve the treatment efficiency by discharge.

  By the way, due to eutrophication in recent years, large quantities of blue-green algae plankton called aoko have occurred in various lakes, reservoirs, or water tanks (hereinafter referred to as treated water), and watersides such as bad odors have been generated. It causes environmental problems and the generation of toxic substances. As a method for suppressing or removing the occurrence of such abalone, it is considered that the above-described underwater pulse discharge has advantages such as lower cost than chemical removal and less risk of secondary contamination.

  However, it is difficult to treat aquatic organisms generated in a wide area such as a giant sea bream with a configuration in which electrodes are locally disposed as in the conventional technique. In view of this, it is conceivable that the water to be treated is guided to the treatment section in the water passage to be treated that opens in the water to be treated. And by attaching such an algae processing apparatus to a hull, it processes efficiently, by moving to the area | region which generate | occur | produces and the area | region where generation | occurrence | production is estimated.

JP 2004-81119 A

  The treated water taken into the treated water flow path contains various ecological algae. Of course, there are many algae that cause the occurrence of blue-green sea urchins, as they grow as they grow and colonize. However, since algae form colonies at the end of growth, treatment of these algae is not effective for suppressing growth. What is to be treated is algae that exist in a dispersed manner and will proliferate in the future. However, even if the water to be treated containing this is treated, the efficiency is poor, and the time and energy consumption for the treatment become large.

  The present invention has been made in view of the above circumstances, and provides an algal treatment apparatus capable of performing an efficient inactivation treatment by performing a treatment according to the state of occurrence of each algae such as a sea lion. It aims to provide a method.

  In order to achieve the above object, the algal treatment apparatus according to claim 1 is an algae treatment apparatus that inactivates algae floating in the treated water, wherein the algae treating apparatus is disposed in the treated water flow path that opens in the treated water. A separation processing unit that separates the algae grown from the treated water taken in, and an inactivation processing unit that inactivates the algae remaining in the treated water by electrically treating the treated water that has passed through the separation processing unit It is characterized by having.

  The algae treatment apparatus according to claim 2 is an algae treatment apparatus that inactivates algae floating in the treated water, and is contained in the treated water taken into the treated water flow path that opens in the treated water. It has a concentration process part which concentrates algae, and an inactivation process part which inactivates algae in the treated water by electrically treating treated water that has passed through the concentration process part.

  The algae treatment apparatus according to claim 3 is an algae treatment apparatus that inactivates algae floating in the treated water, and the algae treatment apparatus is clustered from the treated water taken into the treated water flow path that opens in the treated water. A separation processing unit that separates algae, a concentration processing unit that electrically treats water to be treated that has passed through the separation processing unit to concentrate algae contained in the water to be treated, and a target that has passed through the separation processing unit. And an inactivation treatment unit that inactivates algae remaining in the water to be treated by electrically treating the treated water.

  The algal treatment apparatus according to claim 4, wherein the separation processing unit includes any one or more of a filtration unit, a centrifugal separation unit, a pressurized flotation unit, and a coagulation sedimentation unit. The method according to claim 3.

  The algae treatment method according to claim 5 is an algae treatment method for inactivating algae floating in the treated water, wherein the algae treatment method is clustered from the treated water taken into the treated water flow channel opened in the treated water. A separation treatment step for separating the algae; and an inactivation treatment step for inactivating the algae remaining in the treatment water by electrically treating the treatment water that has passed through the separation treatment unit. .

  The algae treatment method according to claim 6 is an algae treatment method for inactivating algae floating in the water to be treated, and is contained in the water to be treated introduced into the water passage to be treated that opens in the water to be treated. It has a concentration treatment step for concentrating algae, and an inactivation treatment step for inactivating the algae in the for-treatment water by electrically treating the for-treatment water that has passed through the concentration treatment section.

  The algae treatment apparatus according to claim 7 is an algae treatment apparatus that inactivates algae floating in the water to be treated, and a floating structure on the water for mounting the treatment unit, and for moving the floating structure. The water to be treated flows into the treatment section by the water flow generated by the water flow generation means.

  The algae treatment method according to claim 8 is an algae treatment method for inactivating the algae floating in the water to be treated, using a water flow generating means for moving a floating structure mounted with a treatment unit, The water to be treated is caused to flow into the treatment section by a water flow generated by the water flow generating means.

  The operation method of the algae treatment apparatus according to claim 9 is an operation method of the algae treatment apparatus that inactivates the algae floating in the water to be treated, and the water flow for moving the floating structure mounted with the treatment unit Using the generating means, the floating structure is moved while flowing the water to be treated into the treatment section by the water flow generated by the water flow generating means.

  According to the algae treatment apparatus according to claim 1 or the algae treatment method according to claim 5, among the algae in the water to be treated, those that can be easily removed by grouping are removed in advance by a predetermined separating means, Since only the active algae dispersed in water are electrically treated, the algae can be inactivated efficiently according to the state of occurrence.

  According to the algae treatment apparatus according to claim 2 or the algae treatment method according to claim 6, among the algae in the water to be treated, the algae dispersed in the water are concentrated and then electrically treated. The treatment volume can be greatly reduced, and an efficient algae inactivation treatment can be performed.

  According to the algae treatment apparatus according to claim 7, the algae treatment method according to claim 8, or the operation method of the algae treatment apparatus according to claim 9, the water flow generating means for moving the floating structure is used. Since the water to be treated is treated while flowing into the treatment part, the inactivation treatment of the algae can be performed with high energy efficiency.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a first embodiment of the present invention, which is an algae treatment apparatus for treating algae generated in lakes and ponds, and is formed on a hull 1 that floats on a lake and the like, and a hull 1. The water treatment channel 2, the separation processing unit 3 installed in the water treatment channel 2, and the inactivation processing unit 4 installed on the downstream side of the separation processing unit 3 are provided. The inactivation processing unit 4 performs discharge processing in this embodiment, and as shown in FIG. 2, a cylindrical conduit 10 constituting a part of the water channel 2 to be treated and an axis of the conduit 10. A linear high-voltage side electrode 12 that extends in a row, and a cylindrical ground-side electrode 14 that surrounds the linear high-voltage side electrode 12.

  The water channel 2 to be treated is open at the front of the hull 1 so as to sandwich the draft line, that is, the water surface, and extends in the longitudinal direction of the hull 1 and opens at the rear of the hull 1. Therefore, when the hull 1 travels on the surface of the water, water to be treated such as lake water naturally flows into the water to be treated flow path 2 and is discharged backward.

  The separation processing unit 3 separates floating objects such as algae colonies G from the treated water that has been introduced, and has a predetermined mesh mesh-like filter member 60 installed substantially horizontally below the water line, A fluid transfer pump 63 for sucking in an object such as an algal colony G accumulated on the upper surface of the filter member 60 through a suction pipe (filtrate discharge passage) 61 and transferring it to a storage tank 62 on the hull 1; ing. Since the object filtered by the filter member 60 is accumulated in the latter half of the filter member 60, it can be transferred by the fluid transfer pump 63.

  The inactivation processing unit 4 includes a linear high-voltage side electrode 12 disposed along the axis of the treated water flow path 2, a cylindrical ground-side electrode 14 surrounding the high-voltage side electrode 12, and a space between these electrodes A power supply device 22 and a discharge control device 30 for applying an electric field are provided.

  The high-voltage side electrode 12 is a pair of high-voltage side support members made of a rod-like insulator inserted into the conduit 10 from an opening flange 16 provided on one side (here, the upper side) of the conduit 10 at an axial interval. Both ends are supported by 18. The high-voltage side electrode 12 is led out of the conduit 10 by a conducting wire 20 a that passes through the high-pressure side support member 18, and is inserted through the hull 1 and connected to the high-voltage terminal of the power supply device 22.

  On the other hand, the ground-side electrode 14 is supported by a ground-side support member 26 made of a rod-like insulator inserted into the conduit 10 from the opening flange 24 of the conduit 10. Although the number of the ground-side support members 26 is one in the illustrated example, a plurality of ground-side support members 26 may be arranged and firmly supported. The ground-side electrode 14 is led out of the conduit 10 by a conducting wire 20 b that passes through the ground-side support member 26, and is grounded via an ammeter 28.

  The ammeter 28 is connected to a discharge control device 30. The discharge control device 30 compares, for example, an experimentally obtained threshold value with a discharge current value actually measured by the ammeter 28 to generate arc discharge or streamer discharge. It is designed to detect the disappearance of. In this case, not only the comparison with the threshold value, but also the change rate and change pattern of the discharge current value are taken into consideration, and the disappearance of the arc and streamer discharge (the state where the ionization discharge path disappears and the electric field processing state is regressed) By obtaining these characteristics at the time as data in advance and comparing them with measured values, the occurrence of arc discharge or the disappearance of streamer discharge can be detected more quickly and accurately.

  The power supply device 22 is for supplying electric energy to the discharge device as pulse power that is temporally compressed. As shown in FIG. 3, the power supply device 32 is sufficient to store the electric energy from the power supply 32. A capacitor 34 having a capacity and a switch 36 for sending the electric energy accumulated in the capacitor 34 to the electrode at a predetermined timing are provided. The discharge control device 30 measures the charging voltage of the capacitor 34 with the electrometer 38 and controls the switch 36 so as to be discharged when it reaches a predetermined value. The power supply 32 preferably has, for example, a DC / DC converter, a pulse width modulator (PWM) and / or a variable transformer as a charging voltage adjusting means.

  The discharge control device 30 sets the discharge voltage so as to suppress the occurrence of arc discharge when the measured value of the ammeter 28 is higher than that during streamer discharge and it is determined that arc discharge has occurred. Decrease the value. When the measured value of the ammeter 28 is lower than that during streamer discharge and it is determined that the streamer discharge is disappearing, the set value of the discharge voltage is increased so as to continue the streamer discharge. The amount of change in the discharge voltage at this time may be constant, or may be changed depending on the degree of occurrence of arc discharge. For example, if arc discharge is detected when the discharge voltage is 5 kV, then discharge is performed at 4.8 kV, and if arc discharge still occurs, the voltage is decreased to 4.6 kV. Further, when a stable streamer discharge state in which no arc discharge is generated continues, the set value of the discharge voltage is maintained.

  A method for operating the algae processing apparatus configured as described above will be described. When the hull 1 is run at a predetermined speed in a water source such as a lake or a reservoir, the water to be treated is taken into the water channel 2 to be treated that opens to the water surface. A coarse object such as an algal colony G floating on the surface of the water to be treated is filtered by the filtering member 60 in the separation processing unit 3 and transferred to the storage tank 62 by the fluid transfer pump 63. The water to be treated that has passed through the separation processing unit 3 is inactivated by the streamer discharge in the inactivation processing unit 4 and the algae remaining after being dispersed are inactivated, and then discharged backward.

  In this embodiment, the inactivation processing unit 4 maintains the streamer discharge so as to kill algae such as sea cucumber mainly by the action of electric field and electromagnetic wave. A method with an action may be employed, or electric field processing may be performed by applying an electric field without discharging.

  In this embodiment, among the algae in the for-treatment water taken into the for-treatment water flow path 2, those that form the colony G and can be easily separated by the filter member 60 are separated and dispersed and have a large propagation ability Since only the inactivation process is performed, the load of the inactivation processing unit 4 is small, and an efficient inactivation process can be performed with less time and energy.

  FIG. 4 shows an algal treatment apparatus according to another embodiment of the present invention. The treated water flow path 2A is provided on the hull 1A via a three-way switching valve 64 on the upstream side of the separation treatment unit 3A. The filtrate discharge path 65 leading to the storage tank 62 is branched. The separation processing unit 3A is provided with a filter (filter member) 66 having a predetermined mesh so as to close the treated water flow path 2A. A concentration processing unit 5 is provided on the downstream side of the separation processing unit 3 </ b> A, and the treated water channel 2 </ b> A is branched into a filtrate water channel 67 and a concentrated water channel 68 downstream of the concentration processing unit 5. Submerged pumps 69 and 70 that are means for generating a water flow for moving the hull are provided in each branched flow path, and the filtered water flow path 67 is opened to the rear of the hull 1A as it is, while the concentrated water flow path 68 is not connected. It opens rearward through the activation processing unit 4A. Since the configuration of the inactivation processing unit 4A is basically the same as that of the previous embodiment, the description thereof is omitted.

  In this embodiment, the concentration processing unit 5 includes a cyclone separator 71. The cyclone separator 71 has a well-known structure having a large-diameter portion 72 having upper-side pores and a tapered portion 73 that decreases in diameter toward the lower side.

  In this apparatus, when the submersible pumps 69 and 70 that are the water flow generators for driving are driven, the water to be treated automatically flows into the water to be treated 2A. The fluid flows into the cyclone separator 71 from the tangential direction of the large-diameter portion 72 by the suction force of the submersible pumps 69 and 70 on the downstream side, forms a swirling flow inside, and concentrates and concentrates particles such as algae on the center side. Then, it is discharged into the concentrated water channel 68 from below the tapered portion 73. The water to be treated in which the algae is concentrated is inactivated by receiving streamer discharge or the like in the inactivation processing unit 4A as in the previous embodiment. Thereafter, the water to be treated passes through the water flow generators 69 and 70 for movement and is drained from the rear openings of the filtered water channel 67 and the concentrated water channel 68, and at the same time, it gives a forward thrust to the hull.

  Since the algal colony G and the like are sequentially accumulated in the separation processing unit 3A, the backwash process is performed at an appropriate timing. That is, the three-way switching valve 64 is switched so that the filtrate discharge passage 65 communicates with the separation processing unit 3A, and in this state, one or both of the submersible pumps 69 and 70 which are the water flow generating means for moving the hull are reversed to discharge the outlet. Then, the water is taken in, and the filtering member 66 is made to flow backward to be washed, and the water containing the filtered object is sent to the storage tank 62. After removing the clogging of the filter member 66, the three-way switching valve 64 is switched to continue the processing.

  In this embodiment, since the to-be-treated water containing the algae dispersed with the colony G removed is once concentrated and inactivated, the efficiency of the inactivation treatment is further improved as compared with the previous embodiment. That is, since only the water passing through the concentrated water channel 68 is processed, the processing flow rate is small and the required amount of electric energy is also small. Further, the concentrated water channel 68 has a smaller diameter than the previous embodiment, and the device configuration of the inactivation processing unit 4A such as the discharge electrode can be small, and the cost can be reduced.

  Furthermore, in this embodiment, since the power required for feeding the liquid to be treated can be shared by the pump power required for moving the hull, more economical processing can be performed. In this embodiment, the submersible pump is taken as an example of the moving water flow generator, but the same effect can be obtained by using a water flow generating means such as a screw or a submersible motor. Further, it is sufficient that at least one moving water flow generator is provided between the treated water flow path 2A and the filtered water flow path 67, and if a water flow sufficient for moving the hull and feeding the processing liquid can be generated. Any arrangement or means may be used.

  In this embodiment, since the separation member 3A is provided with the filtration member 66 so as to block the flow path, particles having a predetermined diameter or more are removed here. Therefore, the load on the inactivation processing unit 4A is reduced, and the risk of releasing untreated algae is small. The algae containing the colony G collected in the storage tank 62 are in a state that can be discarded as they are without being treated. On the other hand, only the algae dispersed to the extent that it passes through the filter member 66 is concentrated with a cyclone, and the treatment can be effectively performed by adding the treatment.

  5 and 6 show an algae treatment apparatus according to another embodiment of the present invention. The hull 1A, a pump 40 for pumping up the water to be treated such as a lake, and the suction port of the pump 40 are directed toward the water to be treated. And a suction pipe 42 extending in the direction and a liquid supply pipe 44 connecting the discharge port of the pump 40 and the conduit 10 of the inactivation processing section 4A. Each end of the conduit 10 is connected to the liquid supply pipe 44 and the drain pipe 45 via the three-way switching valves 11a and 11b. The treated water flow path 2 </ b> B is configured by the liquid supply pipe 44 and the drainage pipe 45. In this embodiment, the three-way switching valves 11a and 11b are neutral and can be closed. The internal structure of the conduit 10 and the configuration of the power supply device 22 and the discharge control device 30 are the same as those described with reference to FIGS.

  As shown in FIG. 6, a predetermined mesh (for example, about 2.5 to 625) filter 15 is provided in the conduit 10 in the vicinity of one end. The two three-way switching valves 11a and 11b are interlocked so as to connect the conduit 10 to different pipes. That is, when the first three-way switching valve 11a on the side opposite to the filter 15 connects the conduit 10 to the liquid supply piping 44, the second three-way switching valve 11b on the filter 15 side connects the conduit 10 to the drainage piping 45. When the pump 40 is driven, the filter 15 enters a filtration mode in which the solid matter in the liquid to be treated is filtered. Conversely, when the first three-way switching valve 11a connects the conduit 10 to the drainage pipe 45 and the second three-way switching valve 11b connects the conduit 10 to the liquid supply pipe 44, the pump 40 is driven. The backwash mode is selected in which the solid matter captured by the filter 15 is removed. The pump 40 and the three-way switching valves 11a and 11b are respectively controlled by the main controller 6.

  A bellows-like extendable intake pipe 46 is connected to the lower end of the suction pipe 42 and extends into the water, and the lower end intake 48 is opened downward. The intake pipe 46 is configured to expand in diameter as it goes downward, but the shape is not limited to this. A reel device (intake displacement means) 50 for adjusting the expansion and contraction of the intake pipe 46 is provided on the hull 1B, and this is a wire 52 connected to the distal end of the intake pipe 46 and winds it up. The reel 54 is composed of a motor 56 for driving the reel 54.

  The motor 56 is provided with a sensor (not shown) such as an encoder provided on the output shaft, and the main control device 6 calculates the feed amount of the wire 52 based on the output signal, and takes the lower end of the intake pipe 46. The depth position of the inlet 48 can be known. Of course, a sensor that directly detects the expansion and contraction of the intake pipe 46 may be installed and the output thereof may be used. In this embodiment, the main control device 6 is provided separately from the discharge control device 30, but may be provided integrally.

  A method for operating the algae processing apparatus configured as described above will be described. The hull 1B is run to stop at a position where generation of algae is assumed (or detected), and the intake pipe 46 is extended to a predetermined depth. It is desirable that the algae intake depth is a depth where algae inhabit and other large floating matters do not exist. Next, the three-way switching valve 11a is in a filtration mode in which the first three-way switching valve 11a connects the conduit 10 to the liquid supply pipe 44 and the second three-way switching valve 11b connects the conduit 10 to the drainage pipe 45. 11b, the pump 40 is driven, and liquid is supplied to the conduit 10 of the inactivation processing unit 4B at a predetermined flow rate. Thereby, the algae contained in the water to be treated are captured by the filter 15.

  After operating in the filtration mode for a predetermined time, the main controller 6 stops the pump 40, the first three-way switching valve 11a connects the conduit 10 to the drain pipe 45, and the second three-way switching valve 11b is the conduit. The three-way switching valves 11a and 11b are switched so as to be in a backwash mode in which 10 is connected to the liquid supply pipe 44. Then, the pump 40 is operated for a short time, and the algae attached to the filter 15 is moved to the center side of the conduit 10 to be redispersed. In this state, main controller 6 sends a process start signal to discharge controller 30 of processing unit 2 to start the discharge process as an inactivation process. As described above, the discharge control device 30 supplies the pulse current from the capacitor between the electrodes so as to maintain a predetermined discharge state in the water to be treated in the conduit 10.

  After performing the discharge treatment for a predetermined time, the main controller 6 operates the pump 40 in a state where the three-way switching valves 11a and 11b are in the backwash mode, and discharges the water to be treated containing inactivated algae into the drainage pipe. Drain from 45. Thus, one cycle of the process is completed, and the three-way switching valves 11a and 11b are switched to the filtration mode, and a filtration process is performed to start a new process cycle.

  As described above, in this embodiment, the water to be treated containing dispersed algae is filtered, the algae are concentrated, and then the discharge treatment is performed for a sufficient time and energy, so that it is efficient with less energy. Inactivation treatment can be performed.

  In the above embodiment, the discharge process is not performed during the filtration step, but the discharge process may of course be performed in parallel. In that case, the discharge in the filtration step can be different from the subsequent inactivation step. For example, electric field treatment or streamer discharge is used during the filtration process, and arc discharge is used in the subsequent inactivation process.

  In the above embodiment, the transition from the filtration mode to the discharge mode is set according to time. For example, the differential pressure before and after the filter 15 is measured, or the load current of the drive motor of the pump 40 is measured, The clogging state of the filter 15 may be determined, and based on the determination, the filter mode may be shifted to the discharge mode. Furthermore, in the above-described embodiment, the algae after the inactivation treatment is returned to the water source. However, the algae may be recovered by sending water to a collection tank having another filter.

  In the above embodiment, one conduit 10 is provided. If a plurality of conduits 10 are arranged in parallel, and one of them performs the inactivation process, the other performs the filtration process. In addition, the processing efficiency can be improved by effectively utilizing the power source device 22 and the like.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to these embodiments. For example, in the above embodiment, the hull is moved by humans, but the hull steering operation may be automatically performed in a water area where other ships cannot pass. In that case, it is preferable to use an appropriate guide means such as GPS (Global positioning system). In the above embodiment, the water treatment apparatus is mounted on the hull, but it may be a rig installed in the lake or an apparatus fixed to the nearby land.

It is a figure which shows the algae processing apparatus of 1st Embodiment of this invention. It is a figure which shows the structure of the inactivation process part of the algae processing apparatus of 1st Embodiment of this invention. It is a figure which shows the power supply device of the inactivation process part of the algae processing apparatus of 1st Embodiment of this invention. It is a figure which shows the algae processing apparatus of 2nd Embodiment of this invention. It is a figure which shows the algae processing apparatus of 3rd Embodiment of this invention. It is a figure which shows the structure of the inactivation process part of the algae processing apparatus of 3rd Embodiment of this invention.

Explanation of symbols

1, 1A, 1B Hull 2, 2A, 2B Processed water channel 3, 3A Separation processing unit 4, 4A, 4B Inactivation processing unit 5 Concentration processing unit 12 High voltage side electrode 14 Ground side electrode 15 Filter 22 Power supply device 30 Discharge control Device 32 Power source 60 Filtration member 62 Storage tank 66 Filtration member 69,70 Submersible pump (water flow generating means)
71 Cyclone Separator G Group

Claims (9)

An algae treatment device that inactivates algae floating in water to be treated,
A separation processing unit for separating algae grown from the treated water taken into the treated water flow path that opens in the treated water;
An algae treatment apparatus comprising: an inactivation treatment unit that electrically treats the treatment water that has passed through the separation treatment unit to inactivate algae remaining in the treatment water. An algae treatment device that inactivates algae floating in treated water,
A concentration treatment unit for concentrating algae contained in the for-treatment water introduced into the for-treatment water flow channel that opens in the for-treatment water;
An algae treatment apparatus comprising: an inactivation treatment unit that electrically treats the treatment water that has passed through the concentration treatment unit to inactivate algae in the treatment water. An algae treatment device that inactivates algae floating in water to be treated,
A separation processing unit for separating algae grown from the treated water taken into the treated water flow path that opens in the treated water;
A concentration treatment unit for electrically treating the water to be treated that has passed through the separation treatment unit to concentrate algae contained in the water to be treated;
An algae treatment apparatus comprising: an inactivation treatment unit that electrically treats the treatment water that has passed through the separation treatment unit to inactivate algae remaining in the treatment water.   The algae treatment apparatus according to claim 1 or 3, wherein the separation processing unit includes at least one of a filtering unit, a centrifugal separating unit, a pressurized flotation unit, and a coagulation sedimentation unit. An algae treatment method for inactivating algae floating in water to be treated,
A separation treatment step for separating the algae grown from the treated water taken into the treated water flow path opening in the treated water;
An algae treatment method comprising: an inactivation treatment step of electrically treating the to-be-treated water that has passed through the separation treatment unit to inactivate algae remaining in the to-be-treated water. An algae treatment method for inactivating algae floating in water to be treated,
A concentration treatment step of concentrating the algae contained in the for-treatment water introduced into the for-treatment water flow path opening in the for-treatment water;
An algae treatment method comprising: an inactivation treatment step of inactivating the algae in the water to be treated by electrically treating the water to be treated that has passed through the concentration treatment unit.   An algae treatment apparatus for inactivating algae floating in water to be treated, comprising: a floating structure for mounting a treatment unit; and a water flow generating means for moving the floating structure, and generating the water flow An algae treatment apparatus, wherein water to be treated flows into the treatment part by a water flow generated by the means.   A method for treating algae that inactivates algae floating in water to be treated, wherein the water flow generating means for moving a floating structure mounted with a treatment unit is used, and the water to be treated is supplied by the water flow generated by the water flow generating means. An algae treatment method characterized by flowing into the treatment section.   An operation method of an algae treatment apparatus that inactivates algae floating in water to be treated, wherein a water flow generating means for moving a floating structure mounted with a treatment unit is used, and the water flow generated by the water flow generating means A method for operating an algae treatment apparatus, wherein the floating structure is moved while allowing treated water to flow into the treatment section.

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