JP4826964B2 - Plankton recovery equipment - Google Patents

Description

  The present invention relates to an apparatus for recovering plankton floating in a water area such as a reservoir, a lake, a dam, a river, or a harbor.

  It is known that freshwater red tide generated in closed water areas such as lakes, reservoirs, dam lakes and rivers with little flow is caused by an increase in dinoflagellates and diatoms. When the freshwater red tide occurs, not only the water quality of lakes and marshes deteriorates significantly, but also the landscape deteriorates because the water surface turns reddish brown.

  In order to cope with such a situation, various techniques for recovering and removing plankton floating in the water area have been disclosed (see, for example, Patent Documents 1 to 3). Patent Document 1 discloses a method for decomposing these by adding ozone and hydrogen peroxide to water to be treated including water-bloom and the like, followed by ultrasonic irradiation. Further, Patent Document 2 discloses a method in which water containing aquatic or the like is aerated in an aeration tank, and a coagulant is further added to cause coagulation precipitation. Furthermore, Patent Document 3 discloses a floating water purification apparatus that can separate and recover contaminants in a liquid by a rotary liquid-permeable container that contains a filter medium held in a floating state in water. It is disclosed.

JP 2005-138029 A JP 2003-251365 A JP-A-10-263316

  However, the water purification device described in Patent Document 1 requires an ozone supply device and an ultrasonic generator, and the water purification device described in Patent Document 2 requires an aeration tank, a coagulation sedimentation device, and the like. It is difficult to reduce the size, and the installation cost is also expensive. For this reason, the reality is that it cannot be easily installed in a relatively small reservoir.

  On the other hand, plankton such as blue seaweed and algae can be effectively used as fertilizer because they contain abundant organic matter and nutrient salts. The water purification device described in Patent Document 3 can collect plankton by a rotating liquid-permeable container in which a filtering material is accommodated, but has a complicated structure and requires a dedicated recovery ship. In addition, since the plankton is captured and separated using a filter medium, the filter medium is likely to be clogged, and continuous operation is difficult. In addition, since the rotating liquid-permeable container is installed in the water, the collected plankton contains a lot of moisture, and the problem of odor due to leakage of sewage or rot is likely to occur during transportation and storage.

  The problem to be solved by the present invention is to provide a relatively small plankton recovery apparatus that can easily recover plankton that causes water pollution.

  The plankton recovery apparatus according to the present invention is provided in a liquid-permeable container having a function of allowing water to permeate without passing through plankton, and the liquid-permeable container for taking out plankton captured in the liquid-permeable container. An opening, a support means for tiltably supporting the liquid-permeable container, a rotation driving means for rotating the liquid-permeable container, and water containing plankton sucked from the water to be treated into the liquid-permeable container. And a water supply means for supplying.

  With such a configuration, when water containing plankton sucked by the water supply means from the treated water area is supplied into the liquid-permeable container rotated by the rotation driving means, the water is discharged out of the liquid-permeable container by centrifugal force. In addition, since the dehydrated plankton remains in the liquid-permeable container, the plankton that causes water contamination can be easily recovered and removed. Further, if the liquid-permeable container is tilted by the support means so that the opening portion faces downward, the plankton captured in the liquid-permeable container can be taken out from the opening portion. Furthermore, since the liquid-permeable container serves as both plankton capturing means and dewatering means, the apparatus can be miniaturized.

  Here, it is desirable that the opening of the liquid-permeable container can be opened and closed. With such a configuration, when the water in the plankton trapped in the liquid-permeable container is dehydrated by centrifugal force, it is possible to prevent the plankton from scattering by closing the opening, thereby opening the opening. Then, plankton in the liquid-permeable container can be quickly discharged.

  Further, at least a part of the liquid-permeable container can be formed of a detachable mesh material or a membrane filter. With such a configuration, it is possible to replace with a mesh material or membrane filter with a different mesh size. By attaching a mesh material with an appropriate mesh size, the plankton to be collected and removed can be concentrated. And can be captured efficiently.

  Furthermore, a cleaning means for spraying fluid toward the liquid-permeable container can be provided. With such a configuration, when the liquid-permeable container is clogged with plankton or suspended matter, the plankton or suspended matter is removed by spraying fluid such as water or air onto the liquid-permeable container. Since clogging can be eliminated, continuous operation is possible.

  On the other hand, a floating body for floating the plankton collection device on the water surface can be provided. With such a configuration, the plankton recovery device can be moved while floating on the water surface by the floating body, so that it is easy to move to a region where a large amount of plankton has occurred, and plankton recovery and removal operations are performed efficiently. be able to.

  According to the present invention, it is possible to provide a relatively small plankton recovery device that can easily recover plankton that causes water pollution.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a plankton recovery apparatus according to the first embodiment of the present invention, and FIG. 2 is a plan view of the plankton recovery apparatus shown in FIG.

  As shown in FIGS. 1 and 2, the plankton recovery apparatus 1 of the present embodiment includes a liquid-permeable container 2 having a function of allowing water to permeate without passing plankton, and plankton captured in the liquid-permeable container 2. An opening 2a provided in the liquid-permeable container 2, a support means 8 that supports the liquid-permeable container 2 in a tiltable manner, and a rotation drive means that rotates the liquid-permeable container 2 about the support shaft 6a. A motor 6, a pump 3 that is a water supply means for supplying water containing plankton sucked from the subsurface region 11 of the treated water area 10 into the liquid-permeable container 2 through the water supply pipe 4, and the plankton recovery device A substantially rectangular parallelepiped floating body 9 that floats 1 on the water surface.

  A pair of floats 31 for holding the pump 3 in a floating state at the position of the subsurface region 11 is provided on both sides of the pump 3. A cleaning means 5 for spraying water from the outside toward the liquid-permeable container 2 is provided above the liquid-permeable container 2. The liquid-permeable container 2 is a cylindrical rotationally symmetric body with the support shaft 6a as a center, and is directed from the maximum diameter portion 2b closer to the opening 2a than the center in the direction of the support shaft 6a toward the opening 2a and the support shaft 6a, respectively. The diameter is reduced to a funnel shape. Moreover, the liquid-permeable container 2 is substantially formed of a net-like material made of stainless steel, excluding the connecting portion with the support shaft 6a. Further, a collection container 7 is disposed below the opening 2 a of the liquid-permeable container 2.

  When water containing plankton (not shown) sucked by the pump 3 from the lower surface region 11 of the treated water area 10 is supplied into the liquid-permeable container 2 via the water supply pipe 4, it is rotated by the motor 6. Due to the centrifugal force generated in the liquid-permeable container 2, the water in the plankton is discharged out of the liquid-permeable container 2, and dehydrated plankton (not shown) remains in the liquid-permeable container 2. Plankton that causes water pollution can be easily recovered and removed. Since the number of rotations of the motor 6 can be increased or decreased by a control means (not shown), it is efficient by adjusting the number of rotations according to the amount of plankton trapped in the liquid-permeable container 2 and the water content. Dehydration work can be performed.

  When the plankton trapped in the liquid-permeable container 2 by the progress of the recovery operation reaches a predetermined amount, the support means 8 is operated, and the liquid-permeable container 2 is tilted so that the opening 2a faces downward. Plankton captured in the liquid container 2 is discharged to the collection container 7 from the opening 2a. Since the plankton accommodated in the collection container 7 has a low water content, it can be easily incinerated, but it can also be used as a fertilizer. Note that a lid (not shown) that can be opened and closed can be provided in the opening 2a.

  After the discharge of plankton in the liquid-permeable container 2 is finished, the plankton collection operation can be resumed by operating the support means 8 to return the liquid-permeable container 2 to the original posture. In the plankton recovery apparatus 1, the liquid-permeable container 2 serves as both plankton capturing means and dewatering means, so that the apparatus can be reduced in size and can be easily used in a small-scale treated water area 10. Can do. Since the mesh size of the mesh material forming the liquid-permeable container 2 is not particularly limited, if the liquid-permeable container 2 is formed of the mesh material according to the size of the plankton to be collected, a specific plankton is concentrated and efficient. Can be captured. In addition, the liquid-permeable container 2 can also be formed with a membrane filter instead of the mesh material.

  On the other hand, when the liquid-permeable container 2 is clogged with plankton or suspended solids during the recovery operation, the cleaning means 5 is activated and water is sprayed from the outside toward the liquid-permeable container 2 in a shower shape. , Clogging can be eliminated by removing plankton and suspended solids. For this reason, since the continuous operation is possible without interrupting the collection operation every time clogging occurs, the work efficiency is also excellent.

  Moreover, since the plankton collection | recovery apparatus 1 is provided with the floating body 9, it can move the inside of the to-be-processed water area 10 in the state which floated the plankton collection | recovery apparatus 1 whole on the water surface. Therefore, it is easy to move to and return to a region where a large amount of plankton is generated, and the plankton can be collected and removed efficiently.

  Next, 2nd-4th embodiment of this invention is described based on FIGS. 3 to 7, the portions denoted by the same reference numerals as those in FIGS. 1 and 2 are portions having the same structure and function as the constituent portions of the plankton collection apparatus 1, and thus description thereof is omitted.

  FIG. 3 is a partially omitted perspective view showing a plankton recovery apparatus according to the second embodiment of the present invention, and FIG. 4 is a sectional view of the plankton recovery apparatus shown in FIG. The plankton collection device 20 shown in FIGS. 3 and 4 takes out a cylindrical liquid-permeable container 22 having a function of allowing water to permeate without passing through plankton, and plankton captured in the liquid-permeable container 22. An opening 22a provided on one end surface of the liquid-permeable container 22, a lid 25a attached to the opening 22a so as to be opened and closed, and the liquid-permeable container 22 and the cylindrical body 23 via a shaft support mechanism 28a. And a support means 28 for tilting and the like. The liquid-permeable container 22 is formed of a net-like material 21 at the peripheral surface portion excluding both end faces.

  In the liquid-permeable container 22, a non-permeable cylindrical body 23 is disposed coaxially, and water supply pipes 4 and 23a are disposed coaxially with the rotating shaft 6a. Between the inner peripheral surface of the liquid-permeable container 22 and the outer peripheral surface of the cylindrical body 23, a plurality of support columns 27 are provided radially around the water supply pipes 4 and 23a. The body 23 is integrally held. A bearing 26 is disposed in a portion where the water pipe 4 passes through the end face closing plate 25 b of the cylindrical body 23, and the downstream side of the water pipe 4 piped in the cylindrical body 23 and the water pipe 23 a are connected via a swivel joint 29. They are connected to each other in a rotatable manner. The downstream opening end 23 c of the water supply pipe 23 a is fixed to the center of the end surface closing plate 23 b of the cylindrical body 23 and opens toward the inner surface of the end surface closing plate 24 of the liquid-permeable container 22.

  Water containing plankton sucked from the treated water area is supplied into the liquid-permeable container 22 from the downstream opening end 23c of the water-feed pipe 23a via the water-feed pipes 4 and 23a, and the liquid-permeability rotating by the motor 6. Due to the centrifugal force generated in the container 22, the water in the plankton is discharged out of the liquid-permeable container 22, and the dehydrated plankton remains in the liquid-permeable container 22, making it easy to plankton that causes water contamination. Can be recovered and removed. In the case of the plankton recovery device 20, water discharged from the downstream opening end 23 c of the water supply pipe 23 a can increase the water pressure of water existing in the gap between the inner periphery of the liquid-permeable container 22 and the outer periphery of the cylindrical body 23. Due to the synergistic effect with the centrifugal force, the plankton collection operation can be made more efficient.

  The plankton captured in the gap between the inner periphery of the liquid-permeable container 22 and the outer periphery of the cylindrical body 23 is taken out by opening the lid body 25a attached to the opening 22a provided on one end surface of the liquid-permeable container 22. Can do. In this case, if the support means 28 (see FIG. 3) is operated and the liquid-permeable container 22 is inclined so that the opening 22a faces downward, the plankton in the liquid-permeable container 22 is quickly discharged. be able to.

  Next, FIG. 5 is a partially omitted perspective view showing a plankton recovery apparatus according to the third embodiment of the present invention. The liquid-permeable container 32 constituting the plankton recovery apparatus 30 of the present embodiment has an octagonal cylindrical shape, the outer peripheral portion thereof is formed by eight flat plate-like mesh members 32a, and the octagonal shape is formed on both end faces thereof. End face closing plates 34 and 35 are disposed. Each of the eight mesh members 32a is detachable.

  The water containing plankton sucked from the treated water area is supplied into the liquid-permeable container 32 through the water supply pipe 4, and the plankton is generated by the centrifugal force generated in the liquid-permeable container 32 rotating by the motor 6. The moisture therein is discharged out of the liquid-permeable container 32, and dehydrated plankton remains in the liquid-permeable container 32. Plankton captured in the liquid-permeable container 32 can be discharged out of the liquid-permeable container 32 by removing any of the mesh members 32a.

  In the case of the plankton collection device 30 of the present embodiment, the outer peripheral portion of the liquid-permeable container 32 is formed of a plurality of detachable mesh members 32a, so that it can be replaced with another mesh material or a membrane filter having a different mesh size. it can. Therefore, the plankton can be captured intensively and efficiently by attaching a mesh body having a mesh size corresponding to the plankton to be collected and removed. Moreover, when the liquid-permeable container 32 is clogged, it can be easily cleaned by removing the mesh member 32a.

  Next, FIG. 6 is a cross-sectional view showing a plankton recovery apparatus according to the fourth embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA of FIG. In the liquid-permeable container 42 constituting the plankton recovery apparatus 40 of the present embodiment, the cylindrical body 23 is coaxially disposed in the cylindrical body 41 whose one end surface is closed by the end face closing plate 42b, and the liquid-permeable container 42 is provided. A doughnut-shaped net-like material 45 is detachably attached between the other open end 42a of the first and the outer periphery of the end face closing plate 25b. Since the structure and function of other parts are the same as those of the plankton collection apparatus 20 shown in FIG. 4, the same reference numerals as those in FIG.

  Water containing plankton sucked from the treated water area is supplied into the liquid-permeable container 42 via the water supply pipe 4, and the water in the plankton is discharged out of the liquid-permeable container 32 through the mesh material 45 and dehydrated. Plankton remains in the liquid-permeable container 42. The plankton captured in the liquid-permeable container 42 can be discharged out of the liquid-permeable container 42 from the open end 42a by removing the mesh member 45. In this case, if the liquid-permeable container 42 is inclined such that the support means (not shown) that supports the liquid-permeable container 42 so as to be tiltable is actuated so that the opening end 42a faces downward, the plankton is quickly discharged. can do.

  In the case of the plankton collection device 40 of the present embodiment, the water pipe is provided by providing the donut-shaped net material 45 only on a part of the liquid-permeable container 42 (between the open end 42a and the outer periphery of the end face closing plate 25b). Since the water pressure by the water supplied into the liquid-permeable container 42 via 4 can be increased, plankton can be collected efficiently.

  The plankton collection device of the present invention can be widely used as a water quality purification means in various water areas such as lakes, reservoirs, dams, harbors and sea areas.

It is a side view which shows the plankton collection | recovery apparatus which is 1st Embodiment of this invention. It is a top view of the plankton collection | recovery apparatus shown in FIG. It is a partially-omission perspective view which shows the plankton collection | recovery apparatus which is 2nd Embodiment of this invention. It is sectional drawing of the plankton collection | recovery apparatus shown in FIG. It is a partially-omission perspective view which shows the plankton collection | recovery apparatus which is 3rd Embodiment of this invention. It is sectional drawing which shows the plankton collection | recovery apparatus which is 4th Embodiment of this invention. It is sectional drawing in the AA of FIG.

Explanation of symbols

1, 20, 30, 40 Plankton recovery device 2, 22, 32, 42 Liquid-permeable container 2a, 22a Opening 2b Maximum diameter 3 Pump 4, 23a Water supply pipe 5 Cleaning means 6 Motor 6a Support shaft 7 Recovery container 8, 28 Support means 9 Floating body 10 Water area to be treated 11 Subsurface area 21, 32a, 45 Reticulated material 23, 41 Cylindrical body 23c Downstream opening end 25a Lid 23b, 24, 25b, 34, 35, 42b End face closing plate 26 Bearing 27 Column 28a Shaft support mechanism 29 Swivel joint 31 Float 42a Open end

Claims (5)

  A liquid-permeable container having a function of permeating water without allowing plankton to permeate, an opening provided in the liquid-permeable container for taking out plankton captured in the liquid-permeable container, and the liquid-permeable A support means for tiltably supporting the container; a rotation driving means for rotating the liquid-permeable container; and a water-feeding means for supplying water containing plankton sucked from the treated water area into the liquid-permeable container. Plankton collection device characterized by that.   The plankton collection apparatus according to claim 1, wherein the opening is openable and closable.   The plankton collection | recovery apparatus of Claim 1 or 2 which formed at least one part of the said liquid-permeable container with the reticular material or membrane filter which can be attached or detached.   The plankton collection device according to any one of claims 1 to 3, further comprising cleaning means for spraying fluid toward the liquid-permeable container.   The plankton collection device according to any one of claims 1 to 4, further comprising a floating body for floating the plankton collection device on a water surface.

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