WO2021246342A1 - Dispositif de filtration - Google Patents

Dispositif de filtration Download PDF

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Publication number
WO2021246342A1
WO2021246342A1 PCT/JP2021/020547 JP2021020547W WO2021246342A1 WO 2021246342 A1 WO2021246342 A1 WO 2021246342A1 JP 2021020547 W JP2021020547 W JP 2021020547W WO 2021246342 A1 WO2021246342 A1 WO 2021246342A1
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WO
WIPO (PCT)
Prior art keywords
control
pipe
cleaning
circulating water
filter material
Prior art date
Application number
PCT/JP2021/020547
Other languages
English (en)
Japanese (ja)
Inventor
光宏 岡本
Original Assignee
日本施設株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2020095240A external-priority patent/JP6822710B1/ja
Application filed by 日本施設株式会社 filed Critical 日本施設株式会社
Publication of WO2021246342A1 publication Critical patent/WO2021246342A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/04—Controlling the filtration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/06—Aerobic processes using submerged filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a filtration device.
  • filter media such as coral pieces (sand), oyster shells, hydrophilic ceramics, and effervescent vitreous materials have been used in the circulation breeding of fish and shellfish.
  • a filter medium is used as an aggregate in which a plurality of particles are collected.
  • dirt may be clogged in the voids (pores) formed inside the particles constituting the filter medium, and the voids may be closed.
  • it is necessary to take out the filter material from the container containing the filter material, rub and wash it, or spray it with high-pressure water, which requires a considerable amount of labor and energy. I needed it.
  • an object of the present invention is to provide a filtration device capable of cleaning the filter material with energy saving.
  • the filtration device of the present invention is a filtration device that filters circulating water circulated by a pump via a water tank, and includes a filter material storage container, a filter material housed in the filter material storage container, and the above-mentioned filter material.
  • the filter material accommodating container is provided with a cleaning control device for controlling the cleaning of the filter material, and the filter medium accommodating container communicates with the water tank and an inflow pipe for flowing the circulating water from the water tank into the filter material accommodating container.
  • the cleaning control device includes an outflow pipe that discharges the circulating water from the filter material accommodating container to the water tank, and a vent pipe that discharges the circulating water from the filter material accommodating container.
  • the air blow control for driving the blower that sends air to the circulating water collected inside the filter medium accommodating container is executed.
  • the filter material accommodating container is a bypass pipe that branches from the inflow pipe and the outflow pipe and communicates the inflow pipe and the outflow pipe so as to bypass the filter material accommodating container.
  • the outflow pipe closing control may include closing the inflow pipe and the outflow pipe, and at the same time executing the bypass pipe opening control for opening the bypass pipe.
  • the cleaning control device may execute the pump stop control for stopping the drive of the pump before executing the air blow control.
  • the cleaning control device executes the vent pipe open control for opening the vent pipe after a predetermined time has elapsed from the start of the execution of the air blow control. You can do it.
  • the cleaning control device has elapsed a predetermined time from the start of execution of the vent pipe opening control, or the water level in the filter medium accommodating container. After the water level becomes equal to or lower than the predetermined water level, the vent pipe closing control for closing the vent pipe may be executed.
  • the vent pipe closing control for closing the vent pipe may be executed.
  • the circulating water is made to flow into the filter material storage container by the pump, and the circulation is made into the filter material storage container.
  • the cleaning control device performs a series of cleaning sequence control of the outflow pipe closing control, the air blow control, the vent pipe opening control, the vent pipe closing control, and the water reservoir control a specified number of times. You may do it.
  • the cleaning control device has elapsed a predetermined time since the previous cleaning sequence control was executed, or the circulating water overflows from the filter medium accommodating container, or the circulating water.
  • the cleaning sequence control may be executed again with the transparency of the above value being equal to or less than the specified value as a trigger.
  • the filter medium has a density of 0.9 g / cm 3 or more and 1.1 g / cm 3 or less, and is formed into a plurality of porous particles.
  • Including the elastic body of The pump may circulate the circulating water at a linear speed of 60 m / h or more.
  • FIG. 1 It is an overall schematic diagram of a circulation breeding system. It is explanatory drawing of the filtration apparatus. It is the A arrow view of FIG. It is a control flow diagram. It is explanatory drawing of the filtration apparatus in the outflow pipe closing control. It is explanatory drawing of the filtration apparatus in the air blow control. It is explanatory drawing of the filtration apparatus after the vent pipe open control. It is explanatory drawing of the filtration apparatus in the water accumulation control after the vent pipe closing control. It is explanatory drawing of the filtration apparatus after the bypass pipe open control.
  • FIG. 1 is an overall schematic diagram of the circulation breeding system S.
  • the circulation breeding system S is used to circulate circulating water in the ring water channel to breed aquatic organisms such as seaweeds and fish and shellfish.
  • the circulation breeding system S mainly receives the aquarium 200 for breeding aquatic organisms and the circulating water discharged from the aquarium 200 (hereinafter, may be referred to as breeding water) once.
  • the circulation breeding system S has a water circulation channel which is a circular flow path of circulating water indicated by a water tank 200, a foam separation device 300, a filtration device 100, a circulating water sterilizer 400, and an arrow connecting them. I have. Further, the circulation breeding system S includes a pump P, which is provided in the ring water channel and supplies power to circulate the circulating water.
  • the pump P is not limited to being arranged between the foam separation device 300 and the filtration device 100, and may be arranged at any place on the water ring channel.
  • the circulating water flowing through the ring water of the circulating breeding system S may be seawater or freshwater.
  • Circular breeding is a method of reusing purified circulating water for breeding, and closed circulating breeding (without replenishing circulating water other than evaporation) and semi-circulating breeding (part of circulating water). It is a method of reuse and is classified into two types (one that involves a slight change of water).
  • the circulation breeding system S may be applied to either closed circulation breeding or semi-circulation breeding.
  • the aquarium 200 is a tank for storing circulating water for breeding aquatic organisms. Water lost due to evaporation or the like may be appropriately poured into the water tank 200, and a part of the circulating water may be drained from the water tank 200 as appropriate.
  • the foam separation device 300 removes suspensions containing small particles.
  • the foam separation device 300 is applied when the circulating water is seawater.
  • the foam separation device 300 may be omitted when the circulating water is fresh water.
  • the circulating water sterilizer 400 sterilizes the circulating water by irradiating the circulating water with ultraviolet rays or the like.
  • the circulating water sterilizer 400 is optional and may not be included in the circulating breeding system S.
  • FIG. 2 is a cross-sectional view of the filtration device 100 according to the present embodiment.
  • the flow direction of the circulating water is described as going from the inflow pipe 12 to the outflow pipe 23 as shown by an arrow in FIG. 2, but the opposite flow direction, that is, the outflow pipe 23. It may be from to the inflow pipe 12.
  • the filtration device 100 filters the circulating water circulated by the pump P via the water tank 200. It should be noted that the filtration includes either biological, chemical or physical filtration such as ammonia nitrification. As shown in FIG.
  • the filtration device 100 includes a filter material storage container 10, a filter material 1 housed in the filter material storage container 10, and an inflow pipe 12 for supplying circulating water into the filter material storage container 10. It includes an outflow pipe 23 for flowing out circulating water from the inside of the filter material storage container 10, and a vent pipe 33 for discharging sewage mainly after cleaning the filter material 1 from the inside of the filter material storage container 10.
  • the filtration device 100 has a plurality of filtration materials 1 having a total bulk volume, which is a predetermined ratio with respect to the capacity of the water tank 200, in the filtration material storage container 10.
  • the filter medium 1 is preferably formed in a porous manner.
  • the filter material 1 may be for physical filtration, may be for biological filtration, and may be used for both physical filtration and biological filtration. The filter medium 1 will be described later.
  • the filtration device 100 includes a blower B and a cleaning control device C.
  • the blower B sends air to the circulating water collected inside the filter medium accommodating container 10.
  • the blower B has an air supply unit 41 in which the blower B and the filter material accommodating container 10 are communicated with each other and an air ejection port 41a is provided so as to open inside the filter material accommodating container 10.
  • the air supply unit 41 is provided at the lower part of the storage space of the filter medium storage container 10 so that the air ejection port 41a faces upward.
  • the air sent out from the air ejection port 41a rises from the lower part to the upper part in the circulating water collected inside the filter material accommodating container 10, and thus has the effect of raising the filter material 1. Then, the air acts to separate the deposits such as dust adhering to the filter material 1 from the filter material 1 while bringing about a flow that causes the filter material 1 to convection inside the filter material storage container 10. , The deposits can be peeled off from the filter material 1, and the filter material 1 can be efficiently cleaned.
  • the cleaning control device C has an output including drive and stop of the blower B, an opening / closing operation of the outflow pipe control valve 23c, an opening / closing operation of the vent pipe control valve 33c, an output including driving and stopping of the pump P, and an inflow pipe control valve as appropriate. It is a control device that controls the opening / closing operation of 12c and the bypass pipe control valve 50c, respectively.
  • the cleaning control device C includes a timer for measuring the output timing of the control signal and a counter for counting the number of repetitions of the purification sequence control. As shown in FIG. 2, the cleaning control device C is electrically connected to each of the blower B, the outflow pipe control valve 23c, the vent pipe control valve 33c, and the pump P.
  • the cleaning control device C is appropriately electrically connected to the inflow pipe control valve 12c and the bypass pipe control valve 50c.
  • the filtration device 100 includes the cleaning control device C capable of automatically cleaning the filtration material 1, the function of physical filtration of the filtration material 1 can be effectively maintained. Then, in order to ensure the function of separating bubbles from the circulating water by the foam separating device 300, the load of a physical filter usually provided on the upstream side of the foam separating device 300 in the circulation path for removing coarse dust and the like can be reduced. , The installation of the physical filter itself can be omitted. That is, the filtration device 100 can be provided as an alternative to the physical filter normally provided on the upstream side of the foam separation device 300 in the circulation path. Further, since the filtration device 100 can effectively filter bubbles in addition to coarse dust and the like, it can be provided as a substitute for the foam separation device 300 and the physical filter in the circulation path.
  • the filter material accommodating container 10 has a container body 11, a first upper flange 13 provided on the upper part of the container body 11, and a container body 11 in the center provided on the lower part of the container body 11. It has a first lower flange 14 having an opening hole 14a having substantially the same diameter as the inner diameter.
  • the first upper flange 13 is fixed to the upper part of the container body 11 and the first lower flange 14 is fixed to the lower part of the container body 11 in a watertight state by welding, bolts or the like.
  • the filter material storage container 10 may appropriately include a bypass pipe 50 that branches from the inflow pipe 12 and the outflow pipe 23 and communicates the inflow pipe 12 and the outflow pipe 23 so as to bypass the filter material storage container 10.
  • the container body 11 has rigidity that can withstand the water pressure of circulating water, and may be made of vinyl chloride, for example.
  • the container main body 11 may be made of transparent acrylic or translucent vinyl chloride so that the internal state such as the degree of contamination of the filter material 1 can be confirmed.
  • the container body 11 is preferably cylindrical.
  • the filter material accommodating container 10 has an inflow pipe 12 in which circulating water flows in from the upstream side of the ring water channel in the upper part of the container body 11, and an outflow pipe in which the circulating water flows out to the downstream side of the ring water channel in the lower part of the container body 11. 23 and a vent pipe 33 for discharging the circulating water accumulated inside the filter material accommodating container 10 are provided at the lower part of the container main body 11.
  • the inflow pipe 12 and the outflow pipe 23 are directly or indirectly connected to the water tank 200 outside the filtration device 100, and the circulating water in the water tank 200 is allowed to flow into the inside of the filtration device 100, and the circulation obtained after filtration is performed. It has a function of causing water to flow out to the downstream side from the filtration device 100.
  • the inflow pipe 12 may have an inflow pipe control valve 12c capable of switching the opening and closing of the flow path of the inflow pipe 12 as appropriate.
  • the inflow pipe 12 is preferably provided on or near the ceiling surface (lower surface of the first upper flange 13) of the filtration device 100. As shown in FIG. 2, the inflow pipe 12 may be provided on the side wall of the container main body 11, and may be erected from the upper surface of the first upper flange 13, for example.
  • the inflow pipe control valve 12c is, for example, an electric valve, and may be controlled so as to switch the flow path of the inflow pipe 12 between an open state and a closed state in response to a control signal from the cleaning control device C.
  • the outflow pipe 23 has an outflow pipe control valve 23c that can switch the opening and closing of the flow path of the outflow pipe 23.
  • the outflow pipe 23 is provided below the trap plate 25 in the filtration device 100. As shown in FIG. 2, the outflow pipe 23 may be provided on the side wall of the base member main body 26.
  • the outflow pipe control valve 23c is, for example, an electric valve, and is controlled so as to switch the flow path of the outflow pipe 23 between an open state and a closed state in response to a control signal from the cleaning control device C.
  • the filter material storage container 10 has an overflow pipe 13a communicating with the inside of the filter material storage container 10 at the upper part.
  • the overflow pipe 13a may communicate with any of the ring water channels including the water tank 200. As a result, the circulating water overflowing from the filter medium accommodating container 10 can be returned to the ring water channel.
  • the overflow pipe 13a is a filter material, for example, when dust or the like is clogged in a gap formed between adjacent filter materials 1 and the flow path through which the circulating water passes through the filter material storage container 10 is narrowed. It is a pipe that communicates the inside and outside of the filter medium storage container 10 so that the circulating water can be discharged when the water level of the circulating water in the storage container 10 becomes high.
  • the overflow pipe 13a is normally in an open state. As a result, the overflow pipe 13a does not increase the internal pressure of the filter medium accommodating container 10 even if the filter medium 1 is clogged, the water flow rate decreases, and the water level of the filter medium accommodating container 10 rises. Damage to the filter medium storage container 10 can be prevented.
  • the vent pipe 33 has a vent pipe control valve 33c that can switch the opening and closing of the flow path of the vent pipe 33.
  • the vent pipe 33 is preferably provided near the bottom surface (upper surface of the second lower flange 22).
  • the vent pipe control valve 33c is, for example, an electric valve, and is controlled so as to switch the flow path of the vent pipe 33 between an open state and a closed state in response to a control signal from the cleaning control device C.
  • the first lower flange 14 has a fastening hole 14b for connecting to the fastening hole 21b of the second upper flange 21 of the base member 20, which will be described later, by a fastening member (not shown) such as a bolt and a nut.
  • the bypass pipe 50 is a pipe that branches from the inflow pipe 12 and the outflow pipe 23 and communicates the inflow pipe 12 and the outflow pipe 23 so as to bypass the filter medium accommodating container 10.
  • the bypass pipe 50 includes a bypass pipe control valve 50c.
  • the bypass pipe control valve 50c is electrically connected to the cleaning control device C.
  • the bypass pipe control valve 50c is controlled so as to switch the flow path of the bypass pipe 50 between an open state and a closed state in response to a control signal from the cleaning control device C.
  • the inflow pipe control valve 12c and the bypass pipe control valve 50c are integrated, and the A state in which the inflow pipe 12 is closed and the bypass pipe 50 is opened at the same time, and the A state in which the inflow pipe 12 is opened and the bypass pipe is opened at the same time.
  • the first switching valve 50c1 may have a function of switching between the B state and the B state in which the 50 is closed.
  • the outflow pipe control valve 23c and the bypass pipe control valve 50c are integrated into a C state in which the outflow pipe 23 is closed and the bypass pipe 50 is opened at the same time, and a C state in which the outflow pipe 23 is opened and the bypass is performed at the same time.
  • the second switching valve 50c2 may have a function of switching between the D state in which the tube 50 is closed.
  • the bypass pipe control valve 50c is in a closed state during normal times other than during cleaning (during cleaning sequence control), and responds to a control signal instructing the outflow pipe closing control (B1) from the cleaning control device C. It is controlled to be in the open state. As a result, even if the inflow pipe 12 or the outflow pipe 23 is closed, the bypass pipe 50 is opened, so that the filter material 1 housed in the filter material storage container 10 can be washed while the circulating water is flowing in the ring water channel.
  • the base member 20 has a base member main body 26, a second upper flange 21, and a second lower flange 22.
  • the second upper flange 21 and the second lower flange 22 are fixed to the upper end portion and the lower end portion of the base member main body 26 by means such as welding, respectively.
  • the second upper flange 21 is attached to the first lower flange 14 of the filter medium accommodating container 10 via the trap plate 25.
  • the second lower flange 22 is fixed to a structure such as the ground or the floor of a factory by an anchor (not shown).
  • the base member 20 includes an outflow pipe 23 for flowing out the circulating water obtained after filtration from the inside of the filter material accommodating container 10 and a vent pipe 33 for discharging the circulating water from the inside of the filter material accommodating container 10 to the outside of the ring water channel.
  • the vent pipe 33 is provided on the side surface of the base member 20 that is closer to the bottom surface (upper surface of the second lower flange 22) than the outflow pipe 23.
  • the water flow state of the vent pipe 33 is controlled by opening and closing the vent pipe control valve 33c provided in the vent pipe 33.
  • the trap plate 25 is arranged so as to be sandwiched between the first lower flange 14 and the second upper flange 21. Watertightness is ensured between the trap plate 25 and the first lower flange 14 and between the trap plate 25 and the second upper flange 21 by appropriate sealing means.
  • the trap plate 25 has a plurality of water passage holes 25h having a size that allows circulating water to pass through but cannot pass through the filter medium 1.
  • the trap plate 25 prevents the filter medium 1 from moving downward (downstream side). On the other hand, the circulating water can pass through the water passage hole 25h in the trap plate 25 and reach the outflow pipe 23 provided on the downstream side of the trap plate 25.
  • the filtration device 100 may include a perforated plate (not shown) arranged so as to partition the flow path of the overflow pipe 13a and the filtration material 1 housed inside the container main body 11.
  • the perforated plate has a plurality of water passage holes having a size that allows circulating water to pass through but cannot pass through the filter medium 1.
  • the perforated plate has the same structure as the trap plate 25, and is a disk having a plurality of water passage holes penetrating in the vertical direction (plate thickness direction of the plate) and having an outer shape slightly smaller than the inner shape of the container body 11. It is a shaped body or a reticulated body.
  • the perforated plate Even if the circulating water overflows from the filter material accommodating container 10, it is possible to prevent the filter material 1 from being clogged with the overflow pipe 13a or flowing out from the overflow pipe 13a. Further, if there is a perforated plate, when the circulating water flows into the filter material accommodating container 10, the circulating water is rectified by a plurality of water passage holes provided in the perforated plate, and the filter material accommodating container 10 is rectified. It is possible to keep the flow rate in the cross section. Therefore, it is possible to prevent the circulating water from being unevenly arranged in the filter medium accommodating container 10 due to the impact that the circulating water falls directly from the inflow pipe 12 and concentrates on a part of the filter medium 1. can.
  • the base member 20 has an air blow mechanism 40 that ejects air into the filter medium accommodating container 10. Thereby, the filter material accommodating container 10 and the filter medium 1 in the filter medium accommodating container 10 can be effectively cleaned by the direct action of the ejected air and the action of the water flow generated by the ejection of the air.
  • the air blow mechanism 40 has an air supply unit 41 provided with an air ejection port 41a, and a blower B that communicates with the air supply unit 41 and sends out air. ..
  • the blower B may be, for example, an air pump equipped with an electric air compressor.
  • the air supply unit 41 has a plurality of pipes in which one end communicates with the pipe connected to the blower B and the other end is closed in parallel. A plurality of air ejection ports 41a are provided in each pipe. Each tube penetrates the base member main body 26.
  • FIGS. 2 and 3 show a case where two air supply units 41 are provided. Since the air supply unit 41 has a plurality of pipes provided with the air outlet 41a, the filter material 1 filters the air when the air is ejected from the air outlet 41a, as compared with the case where the air supply unit 41 has a single pipe. Accumulation can be suppressed in the corners inside the material storage container 10, particularly in the peripheral edge of the upper surface of the trap plate 25.
  • the air outlet 41a is provided at a position eccentric from the center of the filter media accommodating container 10 in a plan view.
  • the air outlet 41a may be provided facing upward.
  • the filter medium 1 can be largely moved inside the filter medium storage container 10 while suppressing the accumulation in the corner inside the filter medium storage container 10, particularly at the peripheral edge of the upper surface of the trap plate 25, and the filter medium can be largely moved.
  • the aggregate of 1 can be washed without any gap. Further, as shown in FIG.
  • one air supply unit 41 is provided with an air outlet 41a facing upward, and the other air supply unit 41 is provided with an air outlet 41a. It may be provided facing down.
  • the filter medium 1 is an elastic body formed porously and has a granular (lumpy) shape. More specifically, it has a substantially cubic shape. Then, the plurality of filter media 1 are housed in the filter media storage container 10 of the filter device 100.
  • the filter medium 1 may be used in a state of being compressed and deformed.
  • the elastic body has mechanical properties such that it is remarkably deformed by applying a force corresponding to the fluid pressure due to the flow of circulating water having a linear velocity of about 60 m / h, and returns to the original shape when the force is removed. It means that the rigidity is relatively low as compared with sand and the like. Then, due to its structural characteristics, the filter material 1 performs physical filtration and biological filtration on the circulating water.
  • the filter medium 1 is formed of, for example, polyvinyl alcohol (hereinafter, may be referred to as “PVA”), and has an ability to adsorb bacteria and SS (Suspended Solids, dust in water) that grow in water. It is high in water and has an excellent water filtration function.
  • PVA polyvinyl alcohol
  • SS Small Solids, dust in water
  • the filter medium 1 contains polyvinyl alcohol as a main component, and may contain impurities as long as it does not interfere with physical filtration and biological filtration by nitrifying bacteria.
  • the filter material 1 is formed to be porous. Since the filter medium 1 is porous, the ratio of the surface area per weight can be increased, and the bulk volume and the filtration treatment capacity per weight of the filter medium 1 can be improved.
  • Cells are formed as voids (pores) inside and on the surface of the filter medium 1.
  • the porosity of the filter medium 1 is preferably 90% or more and 95% or less.
  • the average diameter of the cells in the filter medium 1 (hereinafter, may be referred to as “average cell diameter”) is preferably 1200 ⁇ m or more and 1900 ⁇ m or less.
  • the method for measuring the average diameter of the cells in the filter medium 1 is not particularly limited. For example, on the cut surface that appears by cutting the filter material 1 on an arbitrary surface, a region of about 20 mm 2 is observed with an electron microscope or the like, and the maximum length of the opening in each cell existing in the observation field is measured. , The average value obtained by arithmetically averaging the measured maximum lengths can be used as the average diameter of the cells.
  • the filter material 1 preferably has a specific surface area (unit: m 2 / m 3 ), which is the surface area per unit volume, of 3000 m 2 / m 3 or more and 5000 m 2 / m 3 or less. If the specific surface area of the filter medium 1 is smaller than 3000 m 2 / m 3 , the surface area for physical filtration becomes smaller and the area where the vitrifying bacteria settle becomes smaller. The total filtration processing capacity combined with filtration may not be effectively exhibited. Further, if the specific surface area of the filter material 1 is larger than 5000 m 2 / m 3 , the pores of the filter material 1 may be easily clogged.
  • the method for measuring the specific surface area of the filter material 1 is not particularly limited, and the specific surface area of the filter material 1 can be measured using a commercially available specific surface area measuring device.
  • the density of the filter material 1 is preferably smaller than 1.0 g / cm 3.
  • the density of the filter material 1 is 1.0 g / cm 3 or more
  • the filter material 1 does not float in the water and is filtered. It is deposited on the bottom of the material storage container 10.
  • the density of the filter material 1 is smaller than 1.0 g / cm 3
  • the filter material 1 easily floats in the water and easily moves along with the flow of the cleaning water due to the air ejection during cleaning, and the cleaning efficiency. Is improved.
  • the filter medium 1 having a density of less than 1.0 g / cm 3 has a light weight per volume and is excellent in handling.
  • the lower limit of the density of the filter material 1 is not particularly limited, but the density of the filter material 1 is preferably 0.01 g / cm 3 or more.
  • the method for measuring the density of the filter material 1 is not particularly limited, and for example, the density can be obtained by measuring the mass and volume of the filter material 1 and calculating the mass / volume. Further, it is preferable that the density of the filter material 1 is 0.9 g / cm 3 or more and 1.1 g / cm 3 or less.
  • the density of the filter material 1 is smaller than 1.0 g / cm 3 in a state where the nitrifying bacteria are colonized on the surface. If the density of the filter medium 1 in the state where the nitrifying bacteria are settled on the surface is smaller than 1.0 g / cm 3 , the filter medium 1 tends to float in the water, and the flow of the washing water due to the air ejection during washing. As a result, it becomes easier to exercise and the cleaning efficiency is improved.
  • the shape and size of the filter medium 1 are not particularly limited.
  • the filter medium 1 is usually a granular body having a size that can be used with one hand.
  • Specific examples of the shape of the filter material 1 include a spherical shape, a cylindrical shape, a prismatic shape, a truncated cone shape, and a polygonal pyramid shape, a cone shape, a polygonal pyramid shape, and the like.
  • the shape of the filter material 1 is particularly preferably spherical or polygonal columnar, and most preferably cubic. When the shape of the filter material 1 is a cube shape, the gap between the plurality of filter materials 1 can be reduced, and the filter material 1 can be accommodated at a high density in the filter device 100.
  • the size of the filter material 1 having a cube shape is particularly preferably 0.5 cm or more and 3.5 cm or less on one side of the cube.
  • the filter medium 1 has, for example, a cube shape having a side of about 1 cm, about 1.5 cm, about 2 cm, or about 3 cm.
  • the size of the spherical filter material 1 is particularly preferably such that the diameter of the sphere is 0.5 cm or more and 3.5 cm or less. If the diameter of the sphere or one side of the cube is smaller than 0.5 cm, the gap between the filter media 1 becomes too small when the filter media 1 is filled, which causes clogging when circulating water is passed through. It may be easier.
  • the gap between the filter media 1 becomes large when a plurality of filter media 1 are accommodated, and the gap between the filter media 1 is circulated in a short time.
  • the contact efficiency between the circulating water and the surface of the filter medium 1 may decrease.
  • the size of the filter medium 1 which is a cube shape is a cube shape with one side of about 1.5 cm or about 2.0 cm, it becomes easy to move with the flow of cleaning water due to air ejection during cleaning, and cleaning is performed. The efficiency is good.
  • the capacity of the filter material 1 in the filter material storage container 10 and the circulation water speed in the inflow pipe 12 and the outflow pipe 23 pass through, for example, the inside of the filter material storage container 10. It is adjusted as appropriate based on the spatial velocity of the circulating water. Space velocity is also commonly abbreviated as "SV". The higher the space velocity SV, the higher the filtration performance of circulating water, which is preferable.
  • the space velocity SV is a numerical value indicating the ratio of the volume of the circulating water to be filtered to the bulk volume of the filter material 1 housed in the filter material storage container 10 per unit time.
  • FIG. 2 is an explanatory diagram of the filtration device 100.
  • FIG. 3 is a view taken along the arrow A of FIG.
  • a filtration device 100 as shown in FIGS. 2 and 3 is installed in the ring water channel of the circulation breeding system S.
  • the aggregate of the filter material 1 is housed in the filter material storage container 10 and arranged on the trap plate 25. After that, the filter medium 1 may be appropriately compressed.
  • the pump P provided in the ring water channel of the circulation breeding system S is operated. That is, the cleaning control device C executes the normal control (B0) described later. Then, the circulating water circulates in the ring water channel by the power of the pump P. (A4) Then, aquatic organisms such as fish and shellfish are released and bred in the aquarium 200 as appropriate.
  • the aquarium 200 may already be bred with aquatic organisms such as fish and shellfish. In this way, the filter material 1 is used to filter the circulating water circulating in the ring water channel.
  • FIG. 4 is a control flow diagram.
  • FIG. 5 is an explanatory diagram of the filtration device 100 in the outflow pipe closing control (B1).
  • FIG. 6 is an explanatory diagram of the filtration device 100 in the air blow control (B2).
  • FIG. 7 is an explanatory diagram of the filtration device 100 after the vent tube open control (B3).
  • FIG. 8 is an explanatory diagram of the filtration device 100 during the water retention control (B5) after the vent pipe closing control (B4).
  • FIG. 9 is an explanatory diagram of the filtration device 100 after the bypass tube open control (D1).
  • the cleaning method of the filter medium 1 is automatically executed as follows according to the control flow diagram shown in FIG. 4 by the cleaning control by the cleaning control device C.
  • the bypass pipe opening control (D1) and the bypass pipe closing control (D2) which will be described later, are not executed, the filtration device 100 may not include the bypass pipe 50.
  • the outflow pipe closing control (B1) for closing the outflow pipe 23 is executed. Specifically, the cleaning control device C sends a control signal to the outflow pipe control valve 23c to control the outflow pipe control valve 23c so as to be in the closed state.
  • the circulating water can be prevented from flowing into the filter material accommodating container 10 from the ring water channel, and the circulating water can be prevented from flowing out from the filter material accommodating container 10 to the ring water channel. Can be partitioned from the water channel.
  • the timing for executing the outflow pipe closing control (B1) is such that the timer provided in the cleaning control device C is activated at the same time as the normal control (B0) is executed, and the elapsed time measured by the timer is set in advance (for example,). It may be 60 minutes, 24 hours, etc.).
  • the preset time for example, 60, 24 hours, etc.
  • the drive of the pump P may be stopped (pump stop control) by sending a control signal for stopping the drive from the cleaning control device C to the pump P. That is, the cleaning control device C may execute control to close the outflow pipe 23 and stop the drive of the pump P (pump stop control).
  • the air blow control (B2) for driving the blower B that sends air to the circulating water collected inside the filter medium accommodating container 10 is executed.
  • the cleaning control device C sends a control signal to the blower B to control the blower B to be driven.
  • the air extruded from the blower B is ejected upward from the air ejection port 41a (see FIGS. 2 and 3) of the air blow mechanism 40.
  • the circulating water collected inside and the filter material 1 can be convected.
  • the white arrow drawn inside the filter medium accommodating container 10 indicates the air ejection direction.
  • a flow is generated in the circulating water of the filter material storage container 10 due to the ejection of air, and the filter material is accompanied by the flow of the circulating water. 1 exercises. Then, due to the friction between the flow of circulating water and the moving filter material 1, substances such as dust and SS that cause clogging adhering to the filter material 1 can be efficiently removed. Therefore, the filter medium 1 can be easily washed without removing the filter medium 1 from the filter medium storage container 10 without replacing the filter medium 1, and the filtration efficiency can be improved. More specifically, in the air supply unit 41, for example, an on-off valve a for preventing the circulating water collected inside the filter medium accommodating container 10 from flowing back toward the blower B when the blower B is stopped, and a blower.
  • An on-off valve b for releasing the air discharged from the blower B when the on-off valve a is closed when B is stopped is provided.
  • the on-off valve a is provided between the filtration accommodating container 10 and the blower B in the air supply unit 41.
  • the on-off valve b is provided in the air supply unit 41 in a pipeline branched from between the on-off valve a and the blower B. Both the on-off valve a and the on-off valve b may be solenoid valves.
  • the on-off valve a is a normally closed type that is opened when energized
  • the on-off valve b is a normally open type that is closed by electromagnetic waves.
  • the cleaning control device C first opens the on-off valve b, then drives the blower B, then opens the on-off valve a, and finally closes the on-off valve b. Further, when the cleaning is stopped, the cleaning control device C first opens the on-off valve b, then closes the on-off valve a, and closes the blower B.
  • the cleaning control device C executes the vent pipe open control (B3) for opening the vent pipe 33 after a predetermined time has elapsed from the start of the execution of the air blow control (B2). Specifically, the cleaning control device C sends a control signal for driving the blower B to the blower B, and at the same time, activates a timer included in the cleaning control device C, and the elapsed time measured by the timer is a preset time (for example). 1 minute), a control signal is sent to the vent pipe control valve 33c to control the vent pipe control valve 33c so that it is in the open state.
  • the circulating water in the filter material storage container 10 is discharged from the vent pipe 33, and the water level drops.
  • the circulating water collected in the filter material accommodating container 10 which is sewage containing dust and the like peeled off from the filter material 1 by cleaning, can be discharged to the outside of the water ring channel.
  • the blower B may or may not be stopped during drainage.
  • the cleaning control device C sends a control signal to the blower B to stop the blower B immediately before or at the same time as controlling the vent pipe control valve 33c to be in the open state. send.
  • the cleaning control device C After that, as shown in FIG. 8, the cleaning control device C has elapsed a predetermined time from the start of the execution of the vent pipe opening control (B3), or the water level in the filter medium storage container 10 is predetermined. After the water level falls below the water level, the vent pipe closing control (B4) for closing the vent pipe 33 is executed. Specifically, the cleaning control device C sends a control signal for opening the vent pipe control valve 33c to the vent pipe control valve 33c, and at the same time, activates a timer included in the cleaning control device C, and the progress measured by the timer.
  • a control signal is sent to the vent pipe control valve 33c to control the vent pipe control valve 33c to be in the closed state.
  • a control signal is sent to the vent pipe control valve 33c to control the vent pipe control valve 33c so as to be in the closed state.
  • the cleaning control device C causes the circulating water to flow into the filter material accommodating container 10 by the pump P, and the circulating water is accumulated in the filter material accommodating container 10 up to the upper limit water level Lt.
  • Control (B5) is executed. Specifically, the cleaning control device C executes a pump drive control for driving the pump P to allow the circulating water to flow into the filter medium accommodating container 10. Then, a control signal is sent to the pump P, the driving of the pump P is continued until a predetermined time elapses, and after the predetermined time elapses, a control signal for stopping the driving of the pump P is sent to the pump P.
  • the cleaning control device C considers that the water level has reached the upper limit water level Lt when the input value reaches a predetermined value based on the input value detected by a sensor (not shown) such as a water level gauge or a water pressure gauge, and pumps.
  • a control signal for stopping the drive of the pump P is sent to P.
  • the circulating water flows into the filter medium accommodating container 10 through the inflow pipe 12 by the pump P. Since the outflow pipe 23 and the vent pipe 33 are in the closed state, the water level in the filter medium accommodating container 10 rises, and the circulating water collects. As a result, circulating water can be stored in the filter medium accommodating container 10.
  • the pump P that circulates the circulating water can also be used as a power source for water injection (reservoir control (B5)) when cleaning the filter medium 1.
  • reservoir control (B5) water injection
  • the pump stop control is not performed in the outflow pipe closing control (B1), the pump P has already started, so that the pump drive control is unnecessary.
  • the bypass pipe open control (D1) described later is performed, the cleaning control device C executes the inflow pipe open control for controlling the inflow pipe 12 to the open state, and at the same time, closes the bypass pipe 50 as appropriate.
  • the closing control (D2) is executed.
  • the path of the circulating water can be switched from the path passing through the bypass pipe 50 to the path passing through the inflow pipe 12, and the circulating water can be flowed into the filter medium accommodating container 10 by the pump P.
  • the circulating water may be flowed into the filter medium accommodating container 10 by the pump P, and the accumulated water control (B5) for accumulating the circulating water up to the upper limit water level Lt in the filter medium accommodating container 10 may be executed.
  • the control (C1) is executed a specified number of times. Specifically, the cleaning control device C counts the number of times the cleaning sequence control (C1) is executed by the counter provided in the cleaning control device C, and performs the cleaning sequence control (C1) until the number of executions reaches the specified number of times. Run.
  • the specified number of times may be once, or may be a plurality of times of two or more, and is preferably three times from the viewpoint of time and efficiency of cleaning per electric power.
  • the cleaning control device C executes the outflow pipe opening control (B7) as shown in FIG. Specifically, the cleaning control device C sends a control signal to the outflow pipe control valve 23c to control the outflow pipe control valve 23c so as to be in the open state.
  • the section of the circulating water in the filter material accommodating container 10 can be released, and the circulating water in the filter material accommodating container 10 can communicate with the ring water channel. Therefore, it is possible to continue breeding of aquatic organisms by using the washed filter medium 1 without taking out the filter medium 1 housed in the filter medium storage container 10 in the water ring channel from the filter medium storage container 10. ..
  • the cleaning control device C closes the bypass pipe 50 at the same time as the inflow pipe open control and the outflow pipe open control (B7) (D2). To execute.
  • the cleaning control device C Further, in the cleaning control device C, a predetermined time has elapsed since the previous cleaning sequence control (C1) was executed, the circulating water overflows from the filter medium accommodating container 10, or the transparency of the circulating water becomes low.
  • the cleaning sequence control (C1) may be executed again with the value becoming equal to or less than the specified value as a trigger. As a result, even if the filter medium 1 is clogged with the lapse of the breeding time, the filter medium 1 can be automatically cleaned at a timing according to the need for cleaning the filter medium 1. Therefore, it is possible to suppress the burden of manual monitoring regarding the cleaning of the filter medium 1.
  • the timer provided in the cleaning control device C is activated, and the timer is activated.
  • the elapsed time measured by the timer may be a preset time (for example, 60 minutes, 24 hours, etc.).
  • the transparency may be a measured value detected by a sensor (not shown) provided in the water ring channel.
  • the cleaning control device C executes the outflow pipe closing control (B1) for closing the outflow pipe 23 while the pump P is still being driven.
  • the bypass pipe opening control (D1) for opening the bypass pipe 50 communicating the inflow pipe 12 and the outflow pipe 23 so as to branch from the inflow pipe 12 and the outflow pipe 23 and bypass the filter material accommodating container 10 is performed. You may do it.
  • the cleaning control device C sends a control signal to the inflow pipe control valve 12c and the outflow pipe control valve 23c, and closes the inflow pipe 12 and the outflow pipe 23, respectively.
  • the bypass pipe control valve 50c is controlled to be in the open state.
  • the filter medium 1 housed in the filter medium storage container 10 can be washed while the pump P is being driven, that is, the circulating water is circulated in the ring water channel. Therefore, while the cleaning method of the filter medium 1 is being carried out (cleaning sequence control (C1) is being executed), changes in the flow velocity, flow rate, or linear velocity of the circulating water passing through the water tank 200 can be suppressed.
  • cleaning sequence control (C1) cleaning sequence control
  • the filter material is accommodated in the other filtration device 100.
  • a plurality of filtration devices 100 can be installed in parallel in the same circulation path.
  • each filtration device 100 may have a cleaning control device C, and each filtration device 100 shares a single cleaning control device C. You may. Further, while the cleaning method of the filter medium 1 is being carried out, other functions on the circulation breeding system S such as the aquarium 200, the foam separation device 300, and the circulating water sterilizer 400 can be prevented from being stopped.
  • the filtration device 100 is not limited to the above-described embodiment, and is within the scope of the gist of the present invention described in the claims. , Various deformations and changes are possible.
  • the filter medium 1 has a density of 0.9 g / cm 3 or more and 1.1 g / cm 3 or less, and contains a granular elastic body formed in a plurality of porous bodies, and the pump P draws circulating water. It may be circulated at a speed of 60 m / h or more.
  • the linear velocity (LV) is the velocity of circulating water passing through the minimum cross-sectional area of the circulation path formed inside the filtration device 100 per unit time (for example, unit: m / h).
  • the linear velocity (m / h) of the circulating water flowing inside the filter medium accommodating container 10 under normal control (B0) is 60 or more, preferably 80 or more, and more preferably 100 or more.
  • Pump P current or voltage
  • the filter medium 1 is compressionally deformed. Then, when the circulating water passes through the gap formed between the adjacent filtering materials 1, the area where the filtering material 1 and the circulating water come into contact with each other increases, and the filtration efficiency can be improved. Moreover, since the density of the filter medium 1 is close to the density of water, it becomes easy to move in water at the time of washing, so that the washing efficiency can be improved.
  • the pump P for circulating the circulating water can also be used as a power source for water injection (reservoir control) into the filter medium accommodating container 10 when cleaning the filter medium 1.
  • the time interval of the cleaning sequence control (C1) is set to an experimental value (after the filtration is started, the filter medium 1 is clogged and the linear velocity of the circulating water in the filter medium storage container 10 decreases, so that the overflow pipe 13a It may be set in advance based on the measured value of the time until the circulating water overflows, etc., but for example, the line of circulating water depends on the amount of the circulating water overflowing from the filter medium accommodating container 10 (or the presence or absence of overflow).
  • the pump P (current or voltage) may be controlled to reduce the speed.
  • the filtration device 100 executes the cleaning sequence control (C1) according to the linear velocity of the circulating water (rotational speed of the pump P, etc.), for example, when the rotational speed of the pump P becomes a predetermined value or less. You may. Thereby, the cleaning of the filter material 1 can be automatically performed according to the degree of contamination of the filter material 1. Further, for example, the cleaning control device C is triggered by the operator issuing a cleaning start command to the cleaning control device C by pressing a cleaning start switch or the like provided on the filtration device 100, as described above. Cleaning sequence control (C1) may be executed.
  • the filtration device 100 is a filtration device 100 that filters circulating water circulated by a pump P via a water tank 200, and is a filtration device contained in a filter material storage container 10 and a filter material storage container 10. It includes a material 1 and a cleaning control device C that controls the cleaning of the filter material 1.
  • the filter material storage container 10 is a flow pipe 12 that communicates with the water tank 200 and flows the circulating water from the water tank 200 into the filter material storage container 10, and the circulating water from the filter material storage container 10 that communicates with the water tank 200. It has an outflow pipe 23 that flows out to the water tank 200, and a vent pipe 33 that discharges the circulating water from the filter medium accommodating container 10.
  • the cleaning control device C executes an outflow pipe closing control (B1) for closing the outflow pipe 23, and then drives an air blow control (B2) that sends air to the circulating water collected inside the filter medium accommodating container 10. ) Is executed. Therefore, the filter medium 1 housed in the filter medium storage container 10 can be automatically washed. Therefore, it is possible to provide the filtration device 100 which can save energy and labor and can wash the filter material 1 at low cost.
  • Filter material 10 Filter material storage container 100 Filter device 11 Container body 12 Inflow pipe 12c Inflow pipe control valve 13 First upper flange 13a Overflow pipe 14 First lower flange 14a Opening hole 14b Fastening hole 20 Base member 200 Water tank 21 Second upper Flange 21b Fastening hole 22 Second lower flange 23 Outflow pipe 23c Outflow pipe control valve 25 Trap plate 25h Water flow hole 26 Base member body 300 Foam separation device 33 Vent pipe 33c Vent pipe control valve 40 Air blow mechanism 400 Circulating water sterilizer 41 Air Supply unit 41a Air outlet 50 Bypass pipe 50c Bypass pipe control valve B Blower C Cleaning control device Lb Lower limit water level Lt Upper limit water level P Pump S Circulation breeding system

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

[Problème] Le but de la présente invention est de fournir un dispositif de filtration capable de nettoyer un milieu filtrant d'une manière économe en énergie. La solution selon l'invention porte sur un dispositif de filtration (100) qui comprend un contenant de réception de milieu filtrant (10), un milieu filtrant (1) logé dans le contenant de réception (10), et un dispositif de commande de nettoyage C qui commande le nettoyage du milieu filtrant (1). Le contenant de réception de milieu filtrant (10) comporte un tuyau d'admission (12), un tuyau d'évacuation (23), et un tuyau coudé (33) pour évacuer l'eau de circulation du contenant de réception de milieu filtrant (10). Le dispositif de commande de nettoyage C exécute une commande de fermeture du tuyau d'évacuation pour fermer le tuyau d'évacuation (23) et exécute ensuite une commande de soufflage d'air pour entraîner une soufflante B qui envoie de l'air dans l'eau de circulation s'accumulant à l'intérieur du contenant de réception de milieu filtrant (10).
PCT/JP2021/020547 2020-06-01 2021-05-28 Dispositif de filtration WO2021246342A1 (fr)

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JP2020095240A JP6822710B1 (ja) 2020-06-01 2020-06-01 ろ過装置
JP2020-095240 2020-06-01
JP2020-218003 2020-12-25
JP2020218003A JP6872282B1 (ja) 2020-06-01 2020-12-25 ろ過装置

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185328A (ja) * 1987-01-26 1988-07-30 追田　哲 魚介類の飼育用水槽の循環式浄化装置
JPS63185329A (ja) * 1987-01-26 1988-07-30 追田　哲 魚介類の飼育用水槽の浄化装置
JPH0810523A (ja) * 1994-04-26 1996-01-16 Toyo Eng Corp 浮遊濾材の洗浄方法
WO1996004784A1 (fr) * 1994-08-12 1996-02-22 Matcon, Rådgivende Ingeniørfirma A/S Systeme et procede de production aquatique
JPH0857465A (ja) * 1994-08-15 1996-03-05 Daiwa Kogyo Kk 浮遊ろ材を用いた水処理装置の逆洗方法
JPH10337585A (ja) * 1997-06-05 1998-12-22 Nippon Steel Corp 浮上性濾過材の逆洗方法
JP2005295939A (ja) * 2004-04-14 2005-10-27 Rikujo Yoshoku Kogaku Kenkyusho:Kk 循環ろ過式養殖装置
JP2019037903A (ja) * 2017-08-22 2019-03-14 日本施設株式会社 ろ過装置、ろ過方法及びろ過材の洗浄方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185328A (ja) * 1987-01-26 1988-07-30 追田　哲 魚介類の飼育用水槽の循環式浄化装置
JPS63185329A (ja) * 1987-01-26 1988-07-30 追田　哲 魚介類の飼育用水槽の浄化装置
JPH0810523A (ja) * 1994-04-26 1996-01-16 Toyo Eng Corp 浮遊濾材の洗浄方法
WO1996004784A1 (fr) * 1994-08-12 1996-02-22 Matcon, Rådgivende Ingeniørfirma A/S Systeme et procede de production aquatique
JPH0857465A (ja) * 1994-08-15 1996-03-05 Daiwa Kogyo Kk 浮遊ろ材を用いた水処理装置の逆洗方法
JPH10337585A (ja) * 1997-06-05 1998-12-22 Nippon Steel Corp 浮上性濾過材の逆洗方法
JP2005295939A (ja) * 2004-04-14 2005-10-27 Rikujo Yoshoku Kogaku Kenkyusho:Kk 循環ろ過式養殖装置
JP2019037903A (ja) * 2017-08-22 2019-03-14 日本施設株式会社 ろ過装置、ろ過方法及びろ過材の洗浄方法

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