GB1572044A - Apparatus for aerating liquids - Google Patents

Apparatus for aerating liquids Download PDF

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Publication number
GB1572044A
GB1572044A GB7706/77A GB770677A GB1572044A GB 1572044 A GB1572044 A GB 1572044A GB 7706/77 A GB7706/77 A GB 7706/77A GB 770677 A GB770677 A GB 770677A GB 1572044 A GB1572044 A GB 1572044A
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GB
United Kingdom
Prior art keywords
nozzle
liquid
nozzles
gas
water
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB7706/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB1572044A publication Critical patent/GB1572044A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • 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
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • 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
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • 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
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B01F25/212—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being movable, e.g. rotating
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B01F25/212—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being movable, e.g. rotating
    • B01F25/2122—Rotating during jetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3203—Gas driven
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
    • C12M27/18—Flow directing inserts
    • C12M27/24—Draft tube
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/06—Nozzles; Sprayers; Spargers; Diffusers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/32015—Flow driven
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Microbiology (AREA)
  • Biomedical Technology (AREA)
  • Biochemistry (AREA)
  • Genetics & Genomics (AREA)
  • Biotechnology (AREA)
  • Sustainable Development (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Physical Water Treatments (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

(54) APPARATUS FOR AERATING LIQUIDS (71) We. METALLGESELLSCHAFT AKTIENGESELLSCHAFT, a body corporate organised under the Laws of the German Federal Republic. of 14 Reuterweg, Frankfurt-on-the-Main. German Federal Republic. do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed. to be particularly de scribed in and by the following statement: This invention relates to an apparatus for aerating liquids. particularly in the treatment of sewage in a tank.
Numerous apparatus for treating sewage with air or oxygen have been proposed and include. e.g.. surface aerators, immersion tube aerators. immersion jet aerators and ejector aerators. All these have the disadvantage that a relatively large quantity of energy is required to discharge air into the sewage to be treated.
According to the present invention there is provided apparatus for aerating a liquid, comprising a tank for holding liquid to be aerated. at least one nozzle mounted within the tank for rotation about a vertical axis, and pump means for feeding liquid and gas to said nozzle(s). the arrangement of the nozzles being such that, when the apparatus is in operation with a jet of liquid and gas being discharged from the or each nozzle into the liquid in the tank. the flow vector of said jet has a component that is tangential to the circular orbit of the nozzle, wherebv the nozzle(s) is (are) caused to rotate by the pressure of the liquid and gas discharged by the nozzle(s).
In using the present apparatus. the relative movement of the nozzle and liquid results in additional turbulence. which enables a uniform distribution of the water and gas in the liquid to be effected.
At the same time, shearing forces cause.
e.y.. oxygen-containing gas, particularly air, to form minute bubbles which enter the liquid, e.g., the sewage. As a result, the growth of microorganisms which assist the treatment of the sewage is greatly improved and the throughput rate of sewage treatment plants, e.g., , plants using activated sludge can be increased.
The present aerating apparatus can be used in many fields of chemical technology, for example in fermentation processes and for introducing carbon dioxide or chlorine into water for sanitary purposes.
Rotary movement is imparted to the nozzle or nozzles by the action of the water and gas discharged with a flow vector which has a component that is tangential to the circular orbit of the rotating nozzle. As a result of this flow vector. the physical phenomenon known as the preservation of momentum causes the rotatablv mounted nozzle to impart a rotation to itself. This principle is also utilized to drive Segner's water wheel. known in physics.
Using rotating nozzles, the present apparatus may be used in a sewage treatment plant not only to aerate the sewage in basins which contain activated sludge but also to separate solids and treated liquid in flotation basins. Air is generally discharged into the flotation basin in order to carry flakes of sludge to the surface of the water so that the sludge can be skimmed off.
In order to enable the invention to be more readily understood. reference will now be made to the accompanying drawings, which illustrate diagrammatically and by wav of example an embodiment thereof, and in which: Figure 1 is a diagram showing part of a sewage treatment plant, Figure 2 a diagrammatic longitudinal sectional view showing a rotary nozzle, in part of a treating apparatus, Figure 3 a top plan view showing the rotary nozzle of Figure 2.
Referring now to Figure 1. there is shown part of a sewage treatment plant which comprises an activating basin 1 for biologic al treatment of sewte, and a flotation basin 2. Sewage to be treated is fed into the activating basin I through a conduit 3, which has an outlet near the bottom 4 of the activating basin. the activating basin 1 being almost entirely filled with sewage to be treated.
An aerator 5 provided noar the bottom of the activating basin I serves to supply the required oxygen to the micfl)()rginisms which decompose in known manner. the organic matter which contaminates the sewage. The aerator is rotatable, as is indicated by in allow (,, and comprises four nozzles, which extend in different directions and through which liquid and air are discharged into the sewage ill the basin I . The acrnlor is connected by a hollow shaft 7 to a stationary beiring l0)using 8 ind a float Xct carries at least part of the weight of the aerator. Air to be introduced into the sewage is sucked through a compressor 9 and is conducted through the hollow shaft 7 to flow to the nozzles of the lerator 5. I)etails ()f the aerator 5 ind of its nozzles will be cxpliined hereinafter with reference to Figures 7 and 3.
Solids-containing water is transferred from the upper portion of the activating basin 1 through a conduit 1() into the flotation basin 7. more pirticularly int() the interior of a shielding cylinder 2u. Adjacent to the shielding cvlinder 'o. a liquid-air mixture is discharged into the basin 2 by an aeflitor II. which has the same principle of operation as the aerator 5 in the basin 1.
The acrator 11 is also rotatablv mounted as indicated by an arrow 6a. Gas bubbles rising in the flotation basin 2 ciuse the flakes of solids to be upwardly entrained and to collect on the surface of the liquid. Some of these solids are transferred through n conduit 1' and are then mixed with the sewage in conduit 3 in order to maintain a sufficiently high biological activitv in the basin 1. The remaining solids are withdrawn through a conduit 13.
The treated water collects in the lower portion of the flotation basin 2 and is withdrawn from the basin 2 through a conduit 14. Some of this treated water is recvcled by a pump 16 through a conduit 15.
a stationary pipe 17. and the aerator 11 into the basin 2. Flotation agents supplied through a conduit 18 may be added to the treated water as it is recvcled while air sucked by a compressor 19 is added to the treated water which is recvcled in pipe 17.
In Figures 2 and 3, the aerator 5 of the activating basin I of Figure I is shown with a bearing r() mounted in the stationarv bearing housing 8 and connected to the hollow shaft 7. which extends to horizontal air ducts 21 and 22, which conduct compressed air to discharge nozzles 23 and 24. The aerator 5 also compriscs a water intake tube 25, which is open at its lower end, and a guiding rod 26 extends from the bottom 4 of the activating basin into the tube 25. The hollow shaft 7 and the intake tube 25 are secured to and connected by a fitting 38. A centrifuWyal pump 27 is provided for sucking water from the basin 1, in the direction of the yarrow 28 in Figures 1 and 2, and forcing the water through water conduits 29 and 30 to water discharge nozzles 31 and 32. In the portion shown on the right in Figurcs 2 and 3, the air discharge nozzle 23 is arranged beside the water discharge nozzle 31 and extends approximately parallel to the latter. In the portion shown on the left in Figures 2 and 3, the water discharge nozzle 32 is concentrically surrounded by the air discharge nozzle 24. Both types of nozzle arrangement or only one of them may be embodied in a given aerator. Whereas the rod 26 is provided to prevent uncontrolled movements of the aerator, the gyroscopic behaviour of the aerator often results in such a high stability that the rod may be omitted.
The jets of gas and liquid discharged from the nozzles 23, 34 and 31, 32 may enter guide tubes, known per se, which may promote the mixing of gas and liquid and may also improve the range of the jets. such guide tubes not being shown because thev are not essential.
Electric current required to operate the centrifugal pump 27 is conducted from the outside via a cable 37 to the housing 8 and is then conducted by sliding contacts, not shown, and a cable, which extends along the hollow shaft 7 within or outside the same and through the fitting 3X and the intake tube 25.
Figure 3, which is a top plan view showing the essential parts of the aerator which may be used in the-activating basin 1 and in the flotation basin 2. shows that the flexible air conduits 21 and 22 are mounted in a connector disc 38 and extend to respective nozzle carriers 39 and 40. which have been omitted in Figure 2 for the sake of claritv.
The air discharge nozzles 23 and 24 and the water discharge nozzles 31 and 32 (nozzles 32 is not visible in Figure 3) are secured in the nozzle carriers 39 and 40, each of which has a lug 41 or 42. which is mounted on a rod 43 or 44. respectively. for rotation about a vertical axis. The two rods 43 and 44 are mounted in the fitting 38 for rotation about their respective longitudinal axes. A connector leads from the fitting 38 to the flexible tubes 29 and 30 connected to the water nozzles 31 and 32.
The air and water conduits leading to the nozzles may be load-carrying structures so that the rods 43 and 44. and the lugs 41 and 42 are superfluous. The conduits and any lugs and rods which are provided are suitably contained in coverings which have a profile designed to minimize drag. Such coverings may consititute floats, but no such covering has been shown in the drawing for the sake of clarity.
The above-mentioned connections between the lugs 41 and 42, the rods 43 and 44, and the fitting 3X. enable the positions of the nozzle carriers 39 and 40 to be adjusted in a horizontal plane and in a vertical one. The aerators shown in the drawings are designed to rotate in a horizontal plane, rotation being imparted to the aerators by the pressure of the water and/or gas which is discharged from the nozzles. Each nozzle extends in such a direction that the vector of the discharge flow has a component which is tangential to the circular orbit. As a result, the reaction which is due to the discharge is utilized to move the nozzles, this phenomenon being known from Segner's water wheel. In the aerator shown in Figure 3, the reaction to the discharge of air and water results in rotation in the clockwise sense, as is indicated bv the arrow 45.
The aerator t which has been described in detail with reference to Figures 2 and 3 differs some what from the aerator 11 arranged in the flotation basin 2 in that the aerator 11 is carried and rotatably mounted by the stationary tube 17. An air-water mixture may be supplied to a single nozzle through the tube 17 so that separate nozzles for discharging air and water, respectively, are no longer required. If air and water are to be discharged through separate nozzles in the aerator 11. the proper treating fluid. air or water, must be separatelv supplied to each nozzle from the outside. These modifications do not involve technical difficulties.
The present apparatus enables sewage treatment basins to be aerated with a low energy requirement. An aerator for discharging air or another gas into a container may comprise any desired number of discharge nozzles, which may be spaced different radial distances from the axis of rotation so that the gas can be introduced in a distribution which is substantiallv uniform throughout the area of the container.
WHAT WE CLAIM IS: 1. Apparatus for aerating a liquid. comprising a tank for holding liquid to be aerated. at least one nozzle mounted within the tank for rotation about a vertical axis, and pump means for feeding liquid and gas to said nozzle(s). the arrangement of the nozzles being such that. when the apparatus is in operation with a jet of liquid and gas being discharged from the or each nozzle into the liquid in the tank. the flow vector of said jet has a component that is tangential to the circular orbit of the nozzle. whereby the nozzle(s) is (are) caused to rotate by the pressure of the liquid and gas discharged by the nozzle(s).
2. Apparatus as claimed in claim 1, wherein the or each nozzle is pivotally mounted.
3. Apparatus as claimed in claim 1 or 2, wherein the nozzles comprise at least one gas discharge nozzle and at least one liquid discharge nozzle, and wherein each gas discharge nozzle cooperates with a liquid discharge nozzle.
4. Apparatus as claimed in any of claims 1 to 3, wherein conduits leading to the nozzle(s) are surrounded by one or more floats.
5. Apparatus as claimed in any one of claims 1 to 4, wherein the tank is an activating basin of a sewage treatment plant.
6. Apparatus as claimed in any one of claims 1 to 5, wherein the tank is a flotation basin of a sewage treatment plant.
7. Apparatus for aerating a liquid substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. 42 are superfluous. The conduits and any lugs and rods which are provided are suitably contained in coverings which have a profile designed to minimize drag. Such coverings may consititute floats, but no such covering has been shown in the drawing for the sake of clarity. The above-mentioned connections between the lugs 41 and 42, the rods 43 and 44, and the fitting 3X. enable the positions of the nozzle carriers 39 and 40 to be adjusted in a horizontal plane and in a vertical one. The aerators shown in the drawings are designed to rotate in a horizontal plane, rotation being imparted to the aerators by the pressure of the water and/or gas which is discharged from the nozzles. Each nozzle extends in such a direction that the vector of the discharge flow has a component which is tangential to the circular orbit. As a result, the reaction which is due to the discharge is utilized to move the nozzles, this phenomenon being known from Segner's water wheel. In the aerator shown in Figure 3, the reaction to the discharge of air and water results in rotation in the clockwise sense, as is indicated bv the arrow 45. The aerator t which has been described in detail with reference to Figures 2 and 3 differs some what from the aerator 11 arranged in the flotation basin 2 in that the aerator 11 is carried and rotatably mounted by the stationary tube 17. An air-water mixture may be supplied to a single nozzle through the tube 17 so that separate nozzles for discharging air and water, respectively, are no longer required. If air and water are to be discharged through separate nozzles in the aerator 11. the proper treating fluid. air or water, must be separatelv supplied to each nozzle from the outside. These modifications do not involve technical difficulties. The present apparatus enables sewage treatment basins to be aerated with a low energy requirement. An aerator for discharging air or another gas into a container may comprise any desired number of discharge nozzles, which may be spaced different radial distances from the axis of rotation so that the gas can be introduced in a distribution which is substantiallv uniform throughout the area of the container. WHAT WE CLAIM IS:
1. Apparatus for aerating a liquid. comprising a tank for holding liquid to be aerated. at least one nozzle mounted within the tank for rotation about a vertical axis, and pump means for feeding liquid and gas to said nozzle(s). the arrangement of the nozzles being such that. when the apparatus is in operation with a jet of liquid and gas being discharged from the or each nozzle into the liquid in the tank. the flow vector of said jet has a component that is tangential to the circular orbit of the nozzle. whereby the nozzle(s) is (are) caused to rotate by the pressure of the liquid and gas discharged by the nozzle(s).
2. Apparatus as claimed in claim 1, wherein the or each nozzle is pivotally mounted.
3. Apparatus as claimed in claim 1 or 2, wherein the nozzles comprise at least one gas discharge nozzle and at least one liquid discharge nozzle, and wherein each gas discharge nozzle cooperates with a liquid discharge nozzle.
4. Apparatus as claimed in any of claims 1 to 3, wherein conduits leading to the nozzle(s) are surrounded by one or more floats.
5. Apparatus as claimed in any one of claims 1 to 4, wherein the tank is an activating basin of a sewage treatment plant.
6. Apparatus as claimed in any one of claims 1 to 5, wherein the tank is a flotation basin of a sewage treatment plant.
7. Apparatus for aerating a liquid substantially as hereinbefore described with reference to the accompanying drawings.
GB7706/77A 1976-02-27 1977-02-23 Apparatus for aerating liquids Expired GB1572044A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762607963 DE2607963A1 (en) 1976-02-27 1976-02-27 METHOD AND DEVICE FOR GASIFYING LIQUIDS

Publications (1)

Publication Number Publication Date
GB1572044A true GB1572044A (en) 1980-07-23

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ID=5971001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7706/77A Expired GB1572044A (en) 1976-02-27 1977-02-23 Apparatus for aerating liquids

Country Status (3)

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JP (1) JPS52105659A (en)
DE (1) DE2607963A1 (en)
GB (1) GB1572044A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014526A1 (en) * 1993-11-26 1995-06-01 Hyperno Proprietary Limited Chemical waste treatment
ITGE20100051A1 (en) * 2010-05-12 2011-11-13 Alberto Ticconi MASS ACCELERATION OXYGENATOR FOR INDEPENDENT POWER PURIFICATION.
GB2527317A (en) * 2014-06-17 2015-12-23 Nch Corp Microbial fermentation system for growing and discharging a biological material
FR3026654A1 (en) * 2014-10-03 2016-04-08 Univ Claude Bernard Lyon DEVICE FOR GENERATING MICROBULLES
CN108652447A (en) * 2018-07-06 2018-10-16 乔德利奥 High temperature fluid heats the device of liquid

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442379B (en) * 1983-03-23 1985-12-23 Purac Ab DEVICE FOR THE SUPPLY AND MIXING OF GAS IN A LIQUID
NO155447C (en) * 1984-01-25 1987-04-01 Ardal Og Sunndal Verk DEVICE FOR PLANT FOR TREATMENT OF A FLUID, E.g. AN ALUMINUM MELT.
JP4520757B2 (en) * 2004-02-03 2010-08-11 株式会社アネモス Air diffuser
JP4727350B2 (en) * 2005-08-31 2011-07-20 昭男 古川 Lake water quality control system
DE102015216517A1 (en) * 2015-08-28 2017-03-02 Aktiebolaget Skf contraption
CN107537338A (en) * 2016-06-28 2018-01-05 厦门大学 A kind of efficiently hybrid technology is equipped with energy-conservation
CN112316771B (en) * 2020-10-12 2022-06-17 淮南矿业(集团)有限责任公司 Double-circuit self-disturbing type high-pressure sand supply device for hydraulic sand adding and fracturing of mine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014526A1 (en) * 1993-11-26 1995-06-01 Hyperno Proprietary Limited Chemical waste treatment
ITGE20100051A1 (en) * 2010-05-12 2011-11-13 Alberto Ticconi MASS ACCELERATION OXYGENATOR FOR INDEPENDENT POWER PURIFICATION.
GB2527317A (en) * 2014-06-17 2015-12-23 Nch Corp Microbial fermentation system for growing and discharging a biological material
GB2527317B (en) * 2014-06-17 2020-12-02 Nch Corp Microbial fermentation system for growing and discharging a biological material
FR3026654A1 (en) * 2014-10-03 2016-04-08 Univ Claude Bernard Lyon DEVICE FOR GENERATING MICROBULLES
CN108652447A (en) * 2018-07-06 2018-10-16 乔德利奥 High temperature fluid heats the device of liquid

Also Published As

Publication number Publication date
JPS52105659A (en) 1977-09-05
DE2607963A1 (en) 1977-09-01

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PS Patent sealed [section 19, patents act 1949]
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