WO2020213305A1 - 水処理装置 - Google Patents

水処理装置 Download PDF

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Publication number
WO2020213305A1
WO2020213305A1 PCT/JP2020/010453 JP2020010453W WO2020213305A1 WO 2020213305 A1 WO2020213305 A1 WO 2020213305A1 JP 2020010453 W JP2020010453 W JP 2020010453W WO 2020213305 A1 WO2020213305 A1 WO 2020213305A1
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WO
WIPO (PCT)
Prior art keywords
water
treated
stirring tank
sludge
tank
Prior art date
Application number
PCT/JP2020/010453
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English (en)
French (fr)
Japanese (ja)
Inventor
吉野　正章
Original Assignee
株式会社ツーフィールズ
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Publication date
Application filed by 株式会社ツーフィールズ filed Critical 株式会社ツーフィールズ
Priority to JP2021514825A priority Critical patent/JP7432945B2/ja
Publication of WO2020213305A1 publication Critical patent/WO2020213305A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F3/12—Activated sludge processes
    • 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 water treatment device.
  • FIG. 14 schematically shows the flow of the standard activated sludge method performed at a sewage treatment plant.
  • inflow water slowly flows in the first settling basin, and the settled first settling basin sludge is removed.
  • the supernatant that first flows out of the settling basin flows into the reaction tank, and a large amount of air is sent from the air diffuser to stir it.
  • the microorganisms decompose the dirt in the water to be treated, and the flocs of the activated sludge containing the microorganisms increase.
  • the reaction tank is also called a biological reaction tank because microorganisms decompose dirt.
  • the water to be treated containing activated sludge flows into a final settling basin installed in a place different from the reaction tank and slowly flows, and is separated into sludge which is a sedimentation component and treated water which is a supernatant component.
  • a part of the sludge settled in the first settling basin is returned to the reaction tank as returned sludge, and the rest is treated as excess sludge.
  • the treated water that flows out of the final settling basin is disinfected with chlorine as needed and discharged into rivers and the sea.
  • the present invention discloses a water treatment apparatus capable of performing water treatment with a small installation area.
  • the water treatment apparatus of the present invention is a water treatment apparatus that obtains treated water from inflow water.
  • a stirring tank containing water to be treated and It has at least a treated water flow section through which the treated water flows and a treated water outflow section from which the treated water flows out at a position higher than the treated water flow section, and the surface of the treated water in the stirring tank. It is provided with a settling chamber, which is separated from the outside underneath and allows solids to settle.
  • the inflow water flows into at least one of the stirring tank and the settling chamber,
  • the treated water flows out of the stirring tank from the treated water outflow portion, It has an embodiment in which the water to be treated in the stirring tank circulates outside the settling chamber in a vertical cross section passing through the settling chamber.
  • FIG. 1A and 1B are diagrams schematically showing an example of a water treatment apparatus
  • FIG. 1C is a diagram schematically showing a settling chamber shown in FIG. 1B
  • FIG. 2A and 2B are diagrams schematically showing another example of the water treatment apparatus.
  • FIG. 3 is a diagram schematically showing another example of a water treatment device.
  • FIG. 4 is a diagram schematically showing another example of a water treatment device.
  • 5A and 5B are diagrams schematically showing another example of the water treatment apparatus.
  • 6A and 6B are diagrams schematically showing another example of the water treatment apparatus.
  • 7A and 7B are diagrams schematically showing another example of the water treatment apparatus.
  • 8A and 8B are diagrams schematically showing another example of the water treatment apparatus.
  • FIG. 9A and 9B are diagrams schematically showing another example of the water treatment apparatus.
  • FIG. 10 is a diagram schematically showing a test device for a water treatment device.
  • FIG. 11 is a diagram showing the measurement results of the COD removal rate according to the reaction tank residence time.
  • FIG. 12 is a diagram schematically showing a design example of a water treatment device.
  • FIG. 13 is a diagram schematically showing a design example of a biological reaction tank and a settling tank by the standard activated sludge method as a comparative example.
  • FIG. 14 is a diagram schematically showing the flow of the standard activated sludge method as a comparative example.
  • the water treatment device 1 is a water treatment device 1 that obtains the treated water W3 from the inflow water W1, and is a stirring tank 10 containing the water to be treated W2 and a settling chamber (for example, FIG. 1B, etc.). 20) and the settling tank 20) shown in the above.
  • the settling chamber (20) has a treated water flow section 21 through which the treated water W2 flows, and a treated water outflow section 22 from which the treated water W3 flows out at a position higher than the treated water flow section 21. It has at least, is separated from the outside under the water surface of the water W2 to be treated in the stirring tank 10, and precipitates solid matter such as sludge.
  • the inflow water W1 flows into at least one of the stirring tank 10 and the settling chamber (20), and the treated water W3 flows out from the treated water outflow section 22 to the outside of the stirring tank.
  • the water W2 to be treated in the stirring tank 10 circulates outside the settling chamber (20) in a vertical cross section passing through the settling chamber (20).
  • the water treatment of the present technology may or may not be wastewater treatment, for example, biological treatment of inflow water W1, coagulation treatment of solid matter contained in inflow water W1, and sludge contained in inflow water W1. Concentration treatment, etc. are included.
  • the water W2 to be treated in the stirring tank 10 circulates outside the settling chamber (20) in a vertical cross section, so that the energy loss of the flow of the water W2 to be treated is reduced and the water W2 to be treated is efficiently stirred. Decomposition of dirt in the water to be treated, aggregation of solids in the water to be treated, and concentration of solids in the water to be treated are promoted.
  • the water to be treated W2 is circulated between the stirring tank 10 and the settling chamber (20) by the water to be treated water flow unit 21.
  • the settling chamber (20) the solid matter in the water to be treated is settled, and the treated water W3 flows out of the stirring tank from the treated water outflow section 22 located at a position higher than the water flow section 21 to be treated.
  • the function of the final settling basin that separates the water to be treated W2 into the solid matter and the treated water W3 is realized inside the stirring tank 10.
  • the inflow water includes sewage, industrial wastewater, domestic wastewater, and other sewage that are subject to biological treatment, sewage that is subject to agglutination of solids, sludge that is subject to concentration, and the like.
  • the upper part of the stirring tank may be open, closed, or closed.
  • the air is dispersed to promote the circulation of the water to be treated in the stirring tank, it is preferable that there is a means for discharging air such as an opening at the upper part of the stirring tank.
  • the present water treatment apparatus is applied to a methane fermentation apparatus, it is preferable that the upper part is closed.
  • the solid matter that settles in the settling chamber includes, but is not limited to, sludge, which is a muddy substance.
  • Sludge includes activated sludge containing a large amount of microorganisms, but is not limited to activated sludge.
  • the water flow section to be treated in the settling chamber may be at the bottom of the settling chamber or above the bottom of the settling chamber.
  • the treated water outflow portion in the settling chamber may be at the top of the settling chamber or below the top of the settling chamber.
  • the solid matter settled in the settling chamber may be returned to the stirring tank from the water flow section to be treated.
  • the solid matter settled in the water treatment apparatus may be manually removed by manually inserting the pipe connected to the pump into the stirring tank and sucking it up.
  • the inflow water may flow into the stirring tank, the settling chamber, or both the stirring tank and the settling chamber.
  • the number of precipitation chambers arranged below the surface of the water to be treated in the stirring tank may be one or two or more.
  • the water treatment device 1 discharges at least one of the solid matter precipitated in the stirring tank 10 and the solid matter existing in the settling chamber (20) to the outside of the stirring tank (for example,).
  • the sludge pipe 70) shown in FIG. 1B or the like may be provided.
  • at least one of the solid matter precipitated in the stirring tank 10 and the solid matter existing in the settling chamber (20) is discharged to the outside of the stirring tank by the solid matter discharging unit (70), which is small.
  • the solid matter discharge unit may discharge only the solid matter precipitated in the stirring tank, may discharge only the solid matter existing in the settling chamber, or exists in both the stirring tank and the settling chamber. Solids may be discharged.
  • the water treatment device 1 may include a solids flow path on-off valve (for example, a sludge valve 75) that opens and closes the flow path of the solids discharge unit (70), and the sedimentation.
  • a concentration detection unit 80 for detecting the suspended solids concentration (for example, MLSS concentration) of at least one of the water to be treated W2 in the chamber (20) and the stirring tank 10 may be provided, and the concentration detection unit 80 detects the concentration.
  • a solid matter discharge control unit 91 that operates the solid matter flow path on-off valve (75) based on the concentration of suspended solids may be provided.
  • the flow path of the solid matter discharge part (70) is opened and closed by the solid matter flow path on-off valve (75) based on the concentration of suspended solids in at least one of the water to be treated W2 in the settling chamber (20) and the stirring tank 10. Therefore, it becomes possible to control the solid matter concentration in the settling chamber (20) and the stirring tank 10. Therefore, this aspect can provide a suitable water treatment apparatus that performs water treatment with a small installation area.
  • the concentration detection unit may detect only the suspended solids concentration of the water to be treated in the settling chamber, may detect only the suspended solids concentration of the water to be treated in the stirring tank, or may detect only the suspended solids concentration in the settling chamber and the stirring tank. The concentration of suspended solids in both treated waters may be detected. This appendix also applies in the following aspects:
  • the main water treatment device 1 may include a treated water flow path on-off valve (for example, a treated water valve 65) that opens and closes the flow path of the treated water outflow portion 22, and the concentration detection.
  • the treated water outflow control unit 92 that operates the treated water flow path on-off valve (65) based on the suspended solids concentration detected by the unit 80 may be provided.
  • the flow path of the treated water outflow portion 22 is opened and closed by the treated water flow path on-off valve (65) based on the concentration of suspended solids in at least one of the water to be treated W2 in the settling chamber (20) and the stirring tank 10. , It becomes possible to prevent the solid matter from flowing out together with the treated water W3. Therefore, this aspect can provide a suitable water treatment apparatus that performs water treatment with a small installation area.
  • the treated water W2 of the settling chamber (20) is located at a position higher than the treated water flow section 21 and lower than the treated water outflow section 22. It may have a suspended solids return unit 23 flowing out to the stirring tank 10.
  • the solid matter to which the bubbles are attached has a small apparent specific gravity and may flow out into the treated water W3. Since the suspended solids return unit 23 is provided in the settling chamber (20), bubbles and floating solids in the settling chamber (20) are returned to the stirring tank 10 to prevent the solids from flowing out together with the treated water W3. Will be possible. Therefore, this aspect can provide a suitable water treatment apparatus that performs water treatment with a small installation area.
  • the water treatment device 1 disperses air into the water to be treated W2 of the stirring tank 10 (see, for example, FIG. 1B), and drives the stirring blades contained in the water to be treated W2 of the stirring tank 10 (see, for example, FIG. 2A).
  • the stirring means 40 for circulating the water W2 to be treated in the stirring tank 10 outside the settling chamber (20) in the vertical cross section may be provided.
  • the stirring means 40 promotes the circulation of the water W2 to be treated in the stirring tank 10, so that the efficiency of water treatment can be improved.
  • FIGS. 1 to 9 schematically illustrate various specific wastewater treatment devices 1A to 1O included in the concept of the water treatment device 1.
  • FIG. 1A is a plan view of the wastewater treatment device 1A as viewed from above
  • FIG. 1B is a vertical cross-sectional view of the wastewater treatment device 1A passing through a settling tank 20 (an example of a settling chamber)
  • FIG. 1C is a wastewater treatment device 1A. It is a vertical sectional view which shows the settling tank 20.
  • UP indicates the top
  • DOWN indicates the bottom.
  • the present technology also includes reversing the left and right sides, reversing the front and back, reversing the direction of the circulating flow C1 and the like.
  • the settling chamber can perform the same function as the final settling basin of the standard activated sludge method. Therefore, in this specific example, the element represented by reference numeral 20 is called a settling tank.
  • the waste water treatment device 1A includes a stirring tank 10, a settling tank 20, a stirring means 40, an inflow pipe 50, a treated water pipe 60, a sludge pipe 70 (an example of a solid matter discharge part), and the like.
  • the inflow water W1 to be treated as wastewater is introduced into the stirring tank 10 via the inflow pipe 50.
  • the inflow water W1 from the inflow pipe 50 may fall on the water surface WS of the water to be treated W2 in the stirring tank 10, or may fall into the stirring tank 10 at a position below the water surface WS. It may be introduced.
  • a part of the water to be treated W2 in the stirring tank 10 enters the settling tank 20 and is separated into sludge S1 (example of solid matter) and treated water W3.
  • the treated water W3 flows out of the stirring tank 10 via the treated water pipe 60, and the sludge S1 is discharged from the stirring tank 10 to the outside of the stirring tank 10 via the sludge pipe 70.
  • the stirring tank 10 has a substantially horizontal rectangular bottom 10b, four substantially vertical rectangular side walls 10w, and an opening 11 at the top.
  • the opening 11 may be covered with a lid 12.
  • the lid 12 may be omitted.
  • methane gas can be collected by attaching a lid 12 to the stirring tank 10.
  • the stirring tank 10 accommodates the settling tank 20 and stores the water to be treated W2 outside the settling tank 20.
  • the water to be treated W2 contained in the stirring tank 10 is gradually flowing due to the inflow of the inflow water W1 and the outflow to the settling tank 20.
  • a structure used in a biological reaction tank or a methane fermentation apparatus for example, a structure made of a synthetic resin such as concrete or polyolefin, a metal such as steel, or the like can be used.
  • the shape of the stirring tank 10 is not limited to the shapes shown in FIGS. 1A and 1B.
  • the bottom 10b may deviate from the horizontal
  • the side wall 10w may deviate from the vertical
  • the bottom 10b may deviate from the vertical. It may be.
  • the settling tank 20 is installed inside the stirring tank 10 under the surface of the water W2 to be treated in the stirring tank 10, and the sludge S1 is settled inside separated from the outside. That is, the internal space of the stirring tank 10 is divided into an internal space of the settling tank 20 and a space outside the settling tank 20 due to the presence of the settling tank 20.
  • the settling tank 20 includes an outer wall portion 30 including an inclined portion 31 to 34 and a standing wall portion 35.
  • the outer wall portion 30 has substantially the same shape of the vertical cross section orthogonal to the horizontal axial direction D1, the upper inclined portions 31 and 32 connected to the closed uppermost portion, and the lower portion connected to the open lowermost portion.
  • the outer wall portion 30 surrounds the internal space of the settling tank 20 by connecting the lower inclined portion 33, the upper inclined portion 31, the upper inclined portion 32, and the lower inclined portion 34 in order in a vertical cross section orthogonal to the axial direction D1. I'm out.
  • the inclination angle ⁇ 1 of the upper inclination portion 31, the inclination angle ⁇ 2 of the upper inclination portion 32, the inclination angle ⁇ 3 of the lower inclination portion 33, and the inclination angle ⁇ 4 of the lower inclination portion 34 are 40 to 40 from the viewpoint of suppressing sludge accumulation.
  • the outer surface of the outer wall portion 30 in the vertical cross section orthogonal to the axial direction D1 has no recessed portion except for the water flow portion 21 to be treated. As a result, a small swirling flow is unlikely to occur in the circulating flow C1 that goes around the outside of the outer wall portion 30, the energy loss of the circulating flow C1 is suppressed, and the water W2 to be treated in the stirring tank 10 is efficiently agitated.
  • the settling tank 20 is supported by the stirring tank 10 by the support portion 36.
  • the support portion 36 may support the standing wall portion 35 as shown in FIG. 1A, or may support at least a part of the inclined portions 31 to 34.
  • the support portion 36 may be installed at the bottom 10b of the stirring tank, the side wall 10w of the stirring tank, the lid 12, or the like. At least one of both ends of the outer wall portion 30 in the axial direction D1 may be closed by the side wall 10w of the stirring tank instead of the standing wall portion 35. In this case, since the outer wall portion 30 is supported by the side wall 10w, the settling tank 20 may not have the support portion 36.
  • the lowermost portion of the outer wall portion 30 is open along the axial direction D1.
  • the settling tank 20 has a water-treated water flow section 21 into which the water to be treated W2 of the stirring tank 10 flows in at the lowermost portion of the outer wall portion 30.
  • a treated water outflow portion 22 into which the treated water W3 flows out via the treated water pipe 60 is arranged above the upper inclined portion 32. Therefore, the treated water outflow section 22 is located higher than the treated water distribution section 21.
  • the position of the treated water outflow portion 22 is not limited to the upper inclined portion 32, and may be an upper inclined portion 31, a standing wall portion 35, or the like.
  • the position of the water flow portion 21 to be treated may be a position lower than the treated water outflow portion 22, and may be a position other than the lowermost portion in the standing wall portion 35 and the downward inclined portions 33 and 34.
  • a structure made of a synthetic resin such as polyolefin, a metal such as steel, concrete, or the like can be used.
  • the support portion 36 may be a structure such as a rope that prevents the settling tank 20 from floating.
  • the shape of the settling tank 20 is not limited to the shapes shown in FIGS. 1A to 1C.
  • the inclined portions 31 to 34 may have a curved surface shape, or the vertical wall portion 35 may deviate from the vertical shape.
  • the stirring means 40 circulates the water W2 to be treated in the stirring tank 10 so as to go around the outside of the settling tank 20 in a vertical cross section passing through the settling tank 20.
  • an air diffuser 41 that diffuses air into the water to be treated W2 of the stirring tank 10 is installed outside the lower inclined portion 33 of the settling tank 20 in the water to be treated W2. It is shown.
  • the buoyancy of a large number of bubbles B1 generated causes the water to be treated between the side wall 10w of the stirring tank 10 and the inclined portions 33 and 31 of the settling tank 20.
  • An ascending flow is generated in W2, the ascending flow changes direction and exceeds the uppermost portion of the settling tank 20, and a descending flow is generated in the water to be treated W2 between the side wall 10w and the inclined portions 32 and 34, and this descending flow is generated. It turns and passes between the bottom 10b and the settling tank 20 and returns to the vicinity of the air diffuser 41. That is, the outside of the settling tank 20 is a circulation path of the water to be treated W2 under the surface of the water W2 to be treated in the stirring tank, and the settling tank 20 is connected to the water W2 to be treated of the stirring tank 10 along this circulation path. A circulating flow C1 is generated around the outside.
  • the inflow pipe 50 is connected to the inside of the stirring tank 10 from the outside, and the inflow water W1 is introduced into the water to be treated W2 of the stirring tank 10.
  • the treated water pipe 60 passes through the inside of the stirring tank 10 from the treated water outflow portion 22 of the settling tank 20 and goes out of the stirring tank 10, and the treated water W3 flows out of the settling tank 20 to the outside of the stirring tank 10.
  • a pump may be connected to the treated water pipe 60, and the treated water W3 may flow out while adjusting the flow rate with the pump.
  • the sludge pipe 70 protrudes from the lower part of the side wall 10w of the stirring tank 10 and discharges the sludge S1 to the outside of the stirring tank 10.
  • a pump may be connected to the sludge pipe 70, and the sludge S1 may be discharged while adjusting the flow rate with the pump.
  • pipes made of materials such as synthetic resin such as polyolefin, metal such as concrete and steel, and the like can be used.
  • the inflow water W1 from the inflow pipe 50 is introduced into the water to be treated W2 in the stirring tank 10.
  • the air diffuser 41 generates a large number of bubbles B1 in the water to be treated W2 outside the lower inclined portion 33 of the settling tank 20
  • the outside of the settling tank 20 is moved in the order of the inclined portions 33, 31, 32, 34 in the vertical cross section.
  • a rotating circulating flow C1 is generated in the water W2 to be treated in the stirring tank 10. Without the settling tank 20, energy loss occurs due to a small swirling flow in the water to be treated, but it is covered along the circulation path formed by having the settling tank 20 under the water surface of the water to be treated W2 in the stirring tank.
  • a large circulating flow C1 is generated in the treated water W2, the energy loss of the flow of the treated water W2 is reduced, and the treated water W2 is efficiently agitated.
  • the settling tank 20 When a part of the agitated water to be treated W2 enters the settling tank 20 from the water to be treated water distribution section 21, it is separated into sludge S1 and treated water W3.
  • the settled sludge S1 falls from the water flow section 21 to be treated, accumulates on the bottom 10b of the stirring tank 10, and is discharged to the outside of the stirring tank through the sludge pipe 70.
  • the wastewater treatment apparatus 1A does not need to provide a settling tank separately from the stirring tank 10 in order to settle the sludge S1 in the water to be treated, so that the wastewater treatment can be performed with a small installation area. is there.
  • the wastewater treatment device 1A is used instead of the aerobic treatment of the standard activated sludge method
  • the inflow water W1 is mixed with the activated sludge in the water to be treated W2, and the water to be treated is contaminated by microorganisms containing aerobic bacteria. Decomposition is promoted by air dispersal.
  • the supernatant of the water to be treated W2 that has entered the settling tank 20 flows out of the stirring tank as the treated water W3.
  • the concentration of activated sludge in the stirring tank 10 can be controlled by appropriately pulling out the sludge S1 precipitated in the stirring tank 10 from the sludge pipe 70. Therefore, the function of the final settling basin that separates the water to be treated W2 into the sludge S1 and the treated water W3 is realized inside the stirring tank 10.
  • the sludge return pump required by the standard activated sludge method becomes unnecessary.
  • the number of devices required for the wastewater treatment device can be reduced, and the construction cost of the wastewater treatment device can be reduced.
  • the cost of power for stirring the water to be treated in the stirring tank can be reduced, and the maintenance cost of the wastewater treatment device can be reduced.
  • FIG. 2A is a vertical cross-sectional view schematically showing a wastewater treatment apparatus 1B suitable for a methane fermentation apparatus.
  • a stirring blade 42a is installed outside the lower inclined portion 33 of the settling tank 20 in the water to be treated W2, and a driving device for rotating the stirring blade 42a. 42b is installed outside the stirring tank 10.
  • the stirring blade 42a and the driving device 42b are examples of stirring means 40 for circulating the water to be treated W2 outside the settling tank 20 in the vertical cross section by driving the stirring blade 42a contained in the water to be treated W2 of the stirring tank 10. ..
  • a part of the stirred water to be treated W2 is separated into sludge S1 and treated water W3 in the settling tank 20, the sludge S1 returned to the stirring tank 10 is discharged from the sludge pipe 70, and the treated water W3 is discharged from the treated water pipe. Outflow from 60. Therefore, the wastewater treatment device 1B can perform anaerobic treatment with a small installation area.
  • the wastewater treatment device 1B includes a siphon 50A as an inflow pipe 50.
  • the tip of the siphon 50A has an inflow structure 43 facing the circulation flow C1 on the surface of the water to be treated W2.
  • the inflow structure 43 is an example of a stirring means 40 in which the water to be treated W2 is circulated outside the settling tank 20 in the vertical cross section by the flow of the flowing water W1 into the stirring tank 10. By efficiently stirring the water W2 to be treated in the stirring tank, the decomposition of dirt in the water to be treated by anaerobic bacteria is promoted. If the inflow pipe 50 has the inflow structure 43, the wastewater treatment device may not have the stirring blade 42a and the drive device 42b. Of course, if the wastewater treatment device has a stirring blade 42a and a driving device 42b, the inflow pipe 50 may not have the inflow structure 43. It is also possible to apply the wastewater treatment device 1B to aerobic treatment.
  • a large number of bubbles B1 from microorganisms contained in the water W2 to be treated in the stirring tank 10 cause the water W2 to be treated to cause the outside of the settling tank 20 in the vertical cross section. May be circulated in.
  • the inflow pipe 50 of the wastewater treatment device 1C introduces the inflow water W1 between the side wall 10w of the stirring tank 10 and the lower inclined portion 33 of the settling tank 20.
  • the buoyancy of a large number of bubbles B1 generated causes an ascending flow in the water to be treated W2 between the side wall 10w and the inclined portions 33 and 31, and the circulation path outside the settling tank 20.
  • a circulation flow C1 that goes around the outside of the settling tank 20 is generated in the water W2 to be treated.
  • the inclination angles ⁇ 1 to ⁇ 4 (see FIG. 1C) of the inclined portions 31 to 34 of the wastewater treatment device 1C are preferably as steep as about 60 to 80 °.
  • the wastewater treatment device 1D shown in FIG. 3 it is also possible to control the discharge of solid matter based on the concentration of suspended solids in the settling tank 20.
  • the wastewater treatment device 1D further includes a sludge valve 75 (an example of a solid material flow path on-off valve), a concentration detection unit 80, and a control unit 90 as a configuration suitable for biological treatment of sewage.
  • the stirring means 40 and the inflow pipe 50 may have any of the configurations used in the above-mentioned wastewater treatment devices 1A to 1C. The same applies to the wastewater treatment devices 1E to 1O described later.
  • the sludge valve 75 is provided in the middle of the sludge pipe 70 and opens and closes the flow path of the sludge pipe 70.
  • a valve such as an electric valve, a solenoid valve, or the like whose flow path can be opened and closed by the control unit 90 can be used.
  • the concentration detection unit 80 detects the MLSS (Mixed Liquor Suspended Solids) concentration in water.
  • concentration detection unit 80 various MLSS meters capable of transmitting the detected concentration of MLSS to the control unit 90 can be used.
  • the wastewater treatment device 1D is provided with an inner concentration detection unit 81 for detecting the MLSS concentration of the water to be treated W2 in the settling tank 20 as the concentration detection unit 80.
  • the inner concentration detecting unit 81 is inserted into the settling tank 20 from above the water surface of the water W2 to be treated in the stirring tank 10 through the outer wall portion 30.
  • the control unit 90 has a CPU (Central Processing Unit) which is a processor, a ROM (Read Only Memory) which is a semiconductor memory, a RAM (Random Access Memory) which is a semiconductor memory, an I / O (input / output) circuit, and the like. ing.
  • the sludge valve 75 and the inner concentration detection unit 81 are connected to an I / O circuit.
  • the CPU uses the RAM as a work area and executes a program stored in the ROM to perform various processes including the processes of steps S11 to S13.
  • the control unit 90 that performs the processes of steps S11 to S13 constitutes the solid matter discharge control unit 91.
  • a PLC Programmable Logic Controller
  • a personal computer, or the like can be used for the control unit 90. It is also possible to configure the control unit 90 with a circuit that performs processing regardless of the CPU.
  • the solid matter discharge control unit 91 monitors the MLSS concentration detected by the inner concentration detection unit 81. At least one of the ROM and the RAM holds a set value to be compared with the detected concentration of MLSS. In step S11, the solid matter discharge control unit 91 branches the process depending on whether or not the detected concentration is larger than the set value. When the sludge interface in the settling tank 20 rises due to the accumulation of sludge S1 in the stirring tank 10 or the increase in the amount of inflow water W1, and the detection concentration of the inner concentration detection unit 81 exceeds the set value, the treatment is performed. The process proceeds to step S12.
  • step S12 the solid matter discharge control unit 91 opens the sludge valve 75 and discharges the excess sludge in the stirring tank 10 from the sludge pipe 70 to the outside of the stirring tank. As a result, the outflow of sludge S1 into the treated water W3 is avoided. After that, the process is returned to step S11.
  • the solid matter discharge control unit 91 closes the sludge valve 75 in step S13. As a result, the solid matter concentration in the stirring tank 10 is controlled within a certain range. After that, the process is returned to step S11. Since the wastewater treatment device 1D can control the solid matter concentration in the stirring tank 10 within a certain range, the maintenance labor can be reduced. Further, the solid matter concentration in the stirring tank 10 can be adjusted by changing the height of the inner concentration detecting unit 81.
  • the wastewater treatment device 1E has a structure suitable for sludge concentration treatment, such as a treated water valve 65 (an example of a treated water flow path on-off valve), an outer concentration detecting unit 82 as an example of a concentration detecting unit 80, and a control unit 90.
  • the treated water outflow control unit 92 as an example is provided.
  • the treated water valve 65 is provided in the middle of the treated water pipe 60 and opens and closes the flow path of the treated water pipe 60.
  • the treated water valve 65 a valve such as an electric valve, a solenoid valve, or the like whose flow path can be opened and closed by the control unit 90 can be used.
  • the outer concentration detecting unit 82 is inserted from above the water surface of the water to be treated W2 in the stirring tank 10 to near the water surface in the water to be treated W2.
  • the treated water outflow control unit 92 performs the treatments of steps S21 to S23.
  • the treated water outflow control unit 92 monitors the MLSS concentration detected by the outer concentration detection unit 82. At least one of the ROM and the RAM holds a set value to be compared with the detected concentration of MLSS. In step S21, the treated water outflow control unit 92 branches the treatment depending on whether or not the detected concentration is smaller than the set value. When the detected concentration of the outer concentration detecting unit 82 is lower than the set value, the treated water outflow control unit 92 opens the treated water valve 65 in step S22 and moves the treated water W3 from the treated water pipe 60 to the outside of the stirring tank. Let it flow out.
  • the solid matter concentration of the stirring tank 10 is increased. After that, the process is returned to step S21.
  • the treated water outflow control unit 92 closes the treated water valve 65 in step S23.
  • the water surface WS of the water to be treated W2 in the stirring tank 10 rises according to the amount of the inflow water W1. After that, the process is returned to step S21.
  • the wastewater treatment device 1E also serves as storage of concentrated sludge.
  • the sludge pipe 70 protruding from the lower part of the stirring tank 10 is used as the first sludge pipe 71, and the sludge S1 existing in the settling tank 20 is discharged to the outside of the stirring tank.
  • the second sludge pipe 72 (example of the sludge pipe 70) may go out from the settling tank 20.
  • the wastewater treatment device 1F is suitable for biological treatment of sewage.
  • the second sludge pipe 72 passes through the inside of the stirring tank 10 from the settling tank 20 and goes out of the stirring tank 10 at a position higher than the treated water flow section 21 and lower than the treated water outflow section 22.
  • the second sludge pipe 72 discharges sludge having a relatively small particle size contained in the water to be treated W2 of the settling tank 20 to the outside of the stirring tank.
  • sludge having a relatively high sedimentation rate can be retained in the stirring tank 10.
  • a pump may be connected to the second sludge pipe 72, and the sludge S1 may be discharged while adjusting the flow rate with the pump.
  • the wastewater treatment device 1F can perform biological treatment by adding a biological carrier to the water to be treated W2.
  • the specific gravity of the biological carrier is made larger than the specific gravity of the activated sludge, the sludge can be discharged without causing the biological carrier to flow out from the second sludge pipe 72.
  • the wastewater treatment device 1D has a sludge valve 75 that opens and closes the flow path of the second sludge pipe 72 in the middle of the second sludge pipe 72, an inner concentration detection unit 81, and a solid matter discharge, as a configuration suitable for biological treatment of sewage.
  • the control unit 91 is provided. Since the configuration and processing of the solid matter discharge control unit 91 are similar to the configuration and processing shown in FIG. 3, they will be described with reference to FIG.
  • step S11 the solid matter discharge control unit 91 branches the process depending on whether or not the detection concentration of the inner concentration detection unit 81 is larger than the set value.
  • the solids discharge control unit 91 moves the sludge in step S12.
  • the valve 75 is opened, and the sludge S1 that is difficult to settle in the settling tank 20 is discharged from the second sludge pipe 72 to the outside of the stirring tank. As a result, the outflow of sludge S1 into the treated water W3 is avoided.
  • the solid matter discharge control unit 91 closes the sludge valve 75 in step S13.
  • the solid matter concentration in the stirring tank 10 is controlled within a certain range.
  • the wastewater treatment device 1G can also perform biological treatment by adding a biological carrier to the water W2 to be treated in the stirring tank 10.
  • the settling tank 20 may be provided with a suspended solids return unit 23 that collects air bubbles and floating sludge in the settling tank 20 and returns them to the stirring tank 10.
  • the wastewater treatment device 1H is suitable for biological treatment of sewage.
  • the treated water W2 of the settling tank 20 flows out to the stirring tank 10 at a position higher than the treated water distribution section 21 and lower than the treated water outflow section 22, for example, in the downward inclined section 34.
  • the position of the suspended solids return portion 23 is not limited to the downward inclined portion 34, and may be an upper inclined portion 32 or the like.
  • the sludge to which the air bubbles are attached has an apparent specific gravity, and if there is no suspended solids return unit 23, the sludge may flow out from the treated water outflow unit 22 together with the treated water W3.
  • the suspended solids return unit 23 collects air bubbles and floating sludge in the settling tank 20 and returns them to the stirring tank 10 again. Since the settling tank 20 has a suspended solids return unit 23, it is possible to prevent bubbles and floating solids in the settling tank 20 from being returned to the stirring tank 10 and flowing out together with the treated water W3. Become.
  • the wastewater treatment device 1I has a treated water valve 65, an inner concentration detecting unit 81, and a treated water outflow control unit 92 that performs treatment in steps S31 to S33, as a configuration suitable for biological treatment of sewage, aggregation treatment of solid matter, and the like. It has.
  • the treated water outflow control unit 92 branches the treatment depending on whether or not the detected concentration of the inner concentration detecting unit 81 is larger than the set value.
  • the treated water outflow control unit 92 opens the treated water valve 65 in step S32 and moves the treated water W3 from the treated water pipe 60 to the outside of the stirring tank. Let it flow out.
  • the treated water outflow control unit 92 closes the treated water valve 65 in step S33. As a result, the outflow of sludge S1 into the treated water W3 is avoided.
  • the wastewater treatment device 1J includes a sludge valve 75, an outer concentration detection unit 82, and a solid matter discharge control unit 91 as a configuration suitable for sludge concentration treatment and solid matter aggregation treatment. Since the configuration and processing of the solid matter discharge control unit 91 are similar to the configuration and processing shown in FIG. 3, they will be described with reference to FIG. In step S11, the solid matter discharge control unit 91 branches the process depending on whether or not the detection concentration of the outer concentration detection unit 82 is larger than the set value.
  • the solid matter discharge control unit 91 closes the sludge valve 75 in step S13.
  • the solid matter discharge control unit 91 opens the sludge valve 75 in step S12 and discharges the sludge S1 from the sludge pipe 70 to the outside of the stirring tank.
  • the wastewater treatment device 1K has a configuration suitable for sludge concentration treatment.
  • the tip of the inflow pipe 50 of the wastewater treatment device 1K faces substantially horizontally and is connected between the upper inclined portion 31 and the lower inclined portion 33 in the settling tank 20.
  • the inflow water W1 from the inflow pipe 50 flows into the settling tank 20 substantially horizontally.
  • the water to be treated W2 in the settling tank 20 is separated into a component containing a large amount of sludge S1 and a treated water W3 which is a supernatant component.
  • the treated water W3 flows out of the stirring tank from the treated water outflow section 22 through the treated water pipe 60.
  • the water to be treated W2 containing a large amount of sludge S1 in the settling tank 20 enters the stirring tank 10 from the water flow section 21 to be treated. Since the circulating flow C1 of the water to be treated W2 that goes around the outside of the settling tank 20 in the vertical cross section is generated in the stirring tank 10 by the stirring means 40, the water to be treated W2 is efficiently stirred. A part of the agitated water to be treated W2 enters the settling tank 20 from the water flow section 21 to be treated, and the water to be treated W2 is also separated into sludge S1 and treated water W3.
  • the concentrated sludge S1 deposited on the bottom 10b of the stirring tank 10 is discharged to the outside of the stirring tank through the sludge pipe 70.
  • the wastewater treatment device 1L also has a configuration suitable for sludge concentration treatment. For example, when fine bubbles adhere to the sludge in the stirring tank 10 by using an air diffuser 41 (see FIG. 1B) for the stirring means 40, the treated water W3 from the settling tank 20 if there is no suspended solids return unit 23. At the same time, sludge may flow out.
  • the suspended solids return unit 23 collects air bubbles and floating sludge in the settling tank 20 and returns them to the stirring tank 10 again.
  • the wastewater treatment device 1M is suitable for biological treatment of sewage, and can also perform biological treatment by adding a biological carrier to the water to be treated W2.
  • the second sludge pipe 72 passes through the inside of the stirring tank 10 from the settling tank 20 and goes out of the stirring tank 10 at a position higher than the treated water flow section 21 and lower than the treated water outflow section 22.
  • the second sludge pipe 72 discharges sludge having a relatively small particle size contained in the water to be treated W2 of the settling tank 20 to the outside of the stirring tank. As a result, bulking is suppressed.
  • a wastewater treatment device 1N suitable for anaerobic treatment of sewage can also be implemented.
  • the wastewater treatment device 1N has a second sludge pipe 72, a first sludge valve 76, and a second sludge that discharge sludge S1 existing in the settling tank 20 to the outside of the stirring tank in the wastewater treatment device 1B shown in FIG. 2A.
  • Valve 77 has been added.
  • the first sludge valve 76 and the second sludge valve 77 are examples of the sludge valve 75.
  • the first sludge valve 76 is provided in the middle of the first sludge pipe 71 and opens and closes the flow path of the first sludge pipe 71.
  • the second sludge valve 77 is provided in the middle of the second sludge pipe 72 and opens and closes the flow path of the second sludge pipe 72. Further, the treated water pipe 60 is pulled out upward from the uppermost portion of the outer wall portion 30 of the settling tank 20, is bent in a substantially horizontal direction in the middle, and is drawn out of the stirring tank 10.
  • the combination of the stirring blade 42a and the driving device 42b and the inflow structure 43 of the siphon 50A generate a circulating flow C1 in the water to be treated W2 of the stirring tank 10 and promote the decomposition of dirt in the water to be treated by anaerobic bacteria. ..
  • a part of the agitated water to be treated W2 is separated into sludge S1 and treated water W3 in the settling tank 20, and sludge S1 that is difficult to settle is discharged from the second sludge pipe 72 and settled in the agitating tank 10.
  • S1 is discharged from the first sludge pipe 71, and the treated water W3 flows out from the treated water pipe 60.
  • the discharge of sludge S1 from the first sludge pipe 71 is controlled by the solid matter discharge control unit (not shown) operating the first sludge valve 76 based on the detected concentration of suspended solids by the concentration detection unit (not shown). May be good.
  • the discharge of sludge S1 from the second sludge pipe 72 is controlled by the solid matter discharge control unit (not shown) operating the second sludge valve 77 based on the detected concentration of suspended solids by the concentration detection unit (not shown). May be good.
  • the wastewater treatment device 1N can perform anaerobic treatment with a small installation area.
  • the air diffuser 41 is shown as the stirring means 40 in FIG. 9B, it is also possible to use the stirring means 40 other than the air diffuser 41 for the wastewater treatment device 1O.
  • the plurality of settling tanks 20 are arranged so that the axial directions D1 (see FIG. 1A) are parallel to each other.
  • the stirring means 40 causes an upward flow in the water to be treated W2 between the settling tanks 20 in a vertical cross section orthogonal to the axial direction D1
  • the flow of the water to be treated W2 is directed toward each settling tank 20 near the water surface WS.
  • a circulating flow C1 that goes around the outside of each settling tank 20 is generated in the water W2 to be treated in the stirring tank 10.
  • the circulating flow that goes around the outside of one settling tank and the circulating flow that goes around the outside of the other settling tank are opposite to each other.
  • the wastewater treatment device 1O is suitable when the area of the stirring tank is large, such as a biological reaction tank of a sewage treatment plant.
  • the water treatment apparatus may perform a treatment for separating the solid matter not contained in the sludge and the treated water from the water to be treated.
  • the water treatment device may be used to obtain purified water or the like.
  • the water treatment device can be applied to a crystallization reaction device or the like.
  • magnesium ions can be added to the stirring tank and the pH can be adjusted to produce a solid substance of magnesium ammonium phosphate hexahydrate. ..
  • the solid matter When the solid matter is settled in a settling tank, the solid matter can be recovered.
  • the same control as for biological treatment can be applied to the control of the solid matter concentration in the stirring tank.
  • the inflow water to the water treatment apparatus may be introduced into both the stirring tank and the settling chamber by, for example, combining the inflow pipes 50 shown in FIGS. 1B and 7B.
  • the water to be treated in the stirring tank is efficiently stirred by the circulating flow, and the water to be treated in the settling chamber is solid-liquid separated.
  • the solid matter discharge part for example, only the second sludge pipe 72 that has passed through the inside of the stirring tank 10 from the settling tank 20 and has come out of the stirring tank is provided in the water treatment device, and only the solid matter existing in the settling chamber is provided outside the stirring tank. It may be discharged.
  • the water treatment apparatus may include both an inner concentration detecting unit 81 and an outer concentration detecting unit 82.
  • the solid matter discharge control unit 91 may operate the sludge valve 75 based on the detection concentrations of both concentration detection units 81 and 82.
  • the treated water outflow control unit 92 may operate the treated water valve 65 based on the detected concentrations of both concentration detection units 81 and 82.
  • the control unit 90 operates the sludge valve 75 and the treated water valve 65 separately based on the detected concentration of the inner concentration detection unit 81.
  • the control unit 90 may operate the sludge valve 75 and the treated water valve 65 separately based on the detected concentration of the outer concentration detecting unit 82.
  • a wastewater treatment device 1D (see FIG. 3) is used for biological treatment of sewage
  • a wastewater treatment device 1E (see FIG. 4) in which sludge S1 discharged from the wastewater treatment device 1D is used as inflow water W1 is used to concentrate sludge. It can be used for processing. In this treatment system, sludge concentration control of the wastewater treatment device 1D becomes unnecessary.
  • the stirring tank may be an element that utilizes the terrain, such as an existing pond. Further, the stirring tank is not limited to an artificial object such as an artificial pond, and may be an element utilizing a natural structure such as a natural pond.
  • FIG. 10 schematically shows a test device for a wastewater treatment device. Both ends of the outer wall portion 30 of the test device in the axial direction are closed by the side walls of the biological reaction layer as the stirring tank 10.
  • the biological reaction tank has a width of 90 mm, a depth of 10 mm, and a height of 130 mm, and has a capacity of 87 mL excluding the settling tank 20.
  • the settling tank 20 has a maximum width of 55 mm, a depth of 10 mm, and a maximum height of 80 mm, and has a capacity of 30 mL.
  • the treated water outflow portion 22 is located near the uppermost portion of the settling tank 20 on the side wall of the biological reaction tank, and the inner diameter of the treated water outflow portion 22 is 10 mm.
  • the tip of the air pipe as the air diffuser 41 is inserted from the water surface WS to the vicinity of the bottom of the biological reaction tank.
  • the inflow water W1 raw water in which a nitrogen source of 13 mgN / L or more and a phosphorus source of 1 mgP / L or more was added to glucose-dissolved water having a COD (Chemical Oxygen Demand) of 100 mg / L was used.
  • FIG. 11 shows the measurement result of the COD removal rate according to the residence time of the raw water in the biological reaction tank.
  • the horizontal axis represents the residence time (minutes) of raw water in the biological reaction vessel, and the vertical axis indicates the COD removal rate (%).
  • the COD removal rate reached 85% when the residence time was about 30 minutes, and the COD removal rate reached 90% when the residence time was about 50 minutes. Therefore, it was confirmed that it is possible to carry out biological treatment of raw water in a short time.
  • FIG. 13 schematically shows a design example of a biological reaction tank and a settling tank by the standard activated sludge method as a comparative example.
  • a plan view of the biological reaction tank and the settling tank is shown in the upper part of FIG. 13, and a vertical cross-sectional view of the biological reaction tank and the settling tank is shown in the lower part of FIG.
  • a biological reaction vessel having a treated water volume of 1000 m 3 / day and a residence time of 8 hours has, for example, a width of 5 m, a length of 13.3 m, an installation area of 67 m 2 , an effective water depth of 5 m, and a capacity of 333 m 3. ..
  • the settling tank having a water area load of 20 m 3 / (m 2 days) has, for example, a width of 5 m, a length of 10 m, an installation area of 50 m 2 , an effective water depth of 2.5 m, and a capacity of 125 m 3 .
  • the combined capacity of the biological reaction tank and the settling tank is 458 m 3
  • the combined installation area of the biological reaction tank and the settling tank is 117 m 2 .
  • FIG. 12 schematically shows a design example of the wastewater treatment apparatus of the present technology.
  • the treated water volume is 1000 m 3 / day.
  • a settling tank with a water area load of 20 m 3 / (m 2 days) is, for example, a maximum width of 1.4 m and a length of 17.9 m for two sets. It has a maximum area of 50 m 2 and a capacity of 118 m 3 for two units.
  • the length above the maximum width portion is 2.425 m
  • the length below the maximum width portion is 1.905 m
  • the width of the water flow section to be treated is 0.3 m. ..
  • the biological reaction tank having a residence time of 8 hours has a size of, for example, a width of 5 m, a length of 18.1 m, an installation area of 90 m 2 , an effective water depth of 5 m, and a capacity of 334 m 3 .
  • the combined capacity of the biological reaction tank and the settling tank is 452 m 3
  • the total installation area of the biological reaction tank and the settling tank is 90 m 2 of the area of the biological reaction tank.
  • the settling tank can be made of a processed steel product, for example, so that the civil engineering work is limited to the biological reaction tank, and a significant reduction in the civil engineering work cost can be expected. Therefore, the wastewater treatment apparatus of the present technology can reduce the cost.
  • sludge pipe (example of solid matter discharge part), 71 ... first sludge pipe, 72 ... second sludge pipe, 75 ... Sludge valve (example of solid material flow path on-off valve), 76 ... First sludge valve, 77 ... Second sludge valve, 80 ... Concentration detection unit, 81 ... Inner concentration detection unit, 82 ... Outer concentration detection unit, 90 ... control unit, 91 ... solid matter discharge control unit, 92 ... treated water outflow control unit, C1 ... Circulating flow, S1 ... Sludge (example of solid matter), W1 ... Inflow water, W2 ... Water to be treated, W3 ... Treated water, WS ... Water surface.

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  • Life Sciences & Earth Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
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PCT/JP2020/010453 2019-04-15 2020-03-11 水処理装置 WO2020213305A1 (ja)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113713663A (zh) * 2021-05-31 2021-11-30 黑龙江省林业科学院伊春分院 一种刺五加软胶囊制造用药液配制装置及方法
WO2024143575A1 (ko) * 2022-12-26 2024-07-04 주식회사 세기종합환경 풍력을 이용한 수질 정화 장치

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US2230386A (en) * 1937-08-12 1941-02-04 American Centrifugal Corp Separation of solids from liquids
JPS5367966U (enrdf_load_stackoverflow) * 1976-11-11 1978-06-07
JPS5966393A (ja) * 1982-10-06 1984-04-14 Seishin Sangyo Kk 廃水処理における懸濁物の分離装置
CN103241815A (zh) * 2013-05-21 2013-08-14 山西省环境工程设计院(有限公司) 净水处理装置

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US2230386A (en) * 1937-08-12 1941-02-04 American Centrifugal Corp Separation of solids from liquids
JPS5367966U (enrdf_load_stackoverflow) * 1976-11-11 1978-06-07
JPS5966393A (ja) * 1982-10-06 1984-04-14 Seishin Sangyo Kk 廃水処理における懸濁物の分離装置
CN103241815A (zh) * 2013-05-21 2013-08-14 山西省环境工程设计院(有限公司) 净水处理装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113713663A (zh) * 2021-05-31 2021-11-30 黑龙江省林业科学院伊春分院 一种刺五加软胶囊制造用药液配制装置及方法
CN113713663B (zh) * 2021-05-31 2024-03-29 黑龙江省林业科学院伊春分院 一种刺五加软胶囊制造用药液配制装置及方法
WO2024143575A1 (ko) * 2022-12-26 2024-07-04 주식회사 세기종합환경 풍력을 이용한 수질 정화 장치

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