EP0000293A1 - Vorrichtung und Verfahren zur anaeroben Zersetzung von biologisch abbaubarem Abfall - Google Patents

Vorrichtung und Verfahren zur anaeroben Zersetzung von biologisch abbaubarem Abfall Download PDF

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Publication number
EP0000293A1
EP0000293A1 EP19780300116 EP78300116A EP0000293A1 EP 0000293 A1 EP0000293 A1 EP 0000293A1 EP 19780300116 EP19780300116 EP 19780300116 EP 78300116 A EP78300116 A EP 78300116A EP 0000293 A1 EP0000293 A1 EP 0000293A1
Authority
EP
European Patent Office
Prior art keywords
gas
tank
arm
holding member
mixing assembly
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.)
Granted
Application number
EP19780300116
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English (en)
French (fr)
Other versions
EP0000293B1 (de
Inventor
George Maxwell Rippon
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.)
Biomechanics Ltd
Original Assignee
Biomechanics Ltd
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 Biomechanics Ltd filed Critical Biomechanics Ltd
Publication of EP0000293A1 publication Critical patent/EP0000293A1/de
Application granted granted Critical
Publication of EP0000293B1 publication Critical patent/EP0000293B1/de
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
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1284—Mixing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/15—Stirrers with tubes for guiding the material
    • 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
    • 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
    • B01F23/2366—Parts; Accessories
    • B01F23/2368—Mixing receptacles, e.g. tanks, vessels or reactors, being completely closed, e.g. hermetically closed
    • 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
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • 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
    • 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
    • C02F3/28—Anaerobic digestion processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/13—Openwork frame or cage stirrers not provided for in other groups of this subclass
    • 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
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Definitions

  • This invention relates to apparatus for anaerobic digestion of biodegradable waste material.
  • the concentration of the solids material which should be maintained in suspension in the tank during anaerobic digestion is often such, especially during start-up of the process, that the solids material tends to settle fast to the floor of the tank where it can compact and require a large force to disturb it and move it back into suspension in the tank. Because of this much more energy is required to maintain in suspension a low concentration of solids than is required with a high concentration of solids which behaves more like a homogeneous liquid and can be kept mixed by using relatively inexpensive gas lift pumps which use relatively little power.
  • An alternative method of preventing settling and compaction of the solids material as a sludge on the bottom of the tank is to use a rotating scraper arm.
  • Such scraper arms are usually driven by a central torque tube from outside the tank roof by a reduction gear drive system.
  • the central drive systems for the scraper arm involve very large torques and are consequently very expensive.
  • the difficulty of mixing the anaerobic bacteria in the waste material in the digestion tank is one of the important factors currently limiting the diameter of the digestion tanks which, for this reason, are built higher and frequently involve very costly foundations.
  • settling and compaction of sludge on the bottom of the anaerobic digestion tank is substantially prevented by rotating an arm from which gas is emitted at a plurality of positions along the length of the arm.
  • apparatus for anaerobic digestion of biodegradable waste material comprising a closed substantially vertical cylindrical tank having a central axis, a gas delivery duct having an outlet disposed near to the central axis of the tank and to the base of the tank, and a mixing assembly located within the tank for rotation about the central axis of the tank, the mixing assembly comprising a gas-holding member which has an open lower surface and which defines an annulus concentric with the said central axis, a part of the annulus defined by the gas-holding member being positioned above the outlet of the gas delivery duct, and a gas distribution arm extending substantially radially outwardly from the said gas-holding member towards the periphery of the tank and having exhaust apertures spaced along the length of the arm for delivering gas from the gas-holding member at different radial distances along the arm, means supporting the gas-holding member and the gas distribution arm near the base of the tank, and drive means for causing the mixing assembly to be rotated about the said central axis, a gas delivery duct having
  • the drive means may comprise a rotatable member positioned within the tank and near the periphery thereof at a similar level in the tank to the mixing assembly, a motor located outside the tank and linked to the rotatable member by means enabling the motor to drive the rotatable member, a wheel located concentrically with the axis of the tank and rigidly connected to the gas-holding member and the gas distribution arm, and an endless flexible drive member embracing the circumferences of the rotatable member and the wheel for transmitting rotational movement from the rotatable member to the wheel.
  • the drive means may comprise gas lift draught tubes mounted on the gas distribution arm for receiving gas from the arm, each gas lift draught tube comprising a vertical portion connected through a right angle bend to a horizontal portion.
  • the driving force is provided by a reaction force developed at the right angle bend.
  • each gas lift draught tube comprises two horizontal portions connected through right angle bends to opposite ends of the vertical portion.
  • the drive means may comprise gas lift draught tubes mounted on the gas distribution arm for receiving.gas from the arm and including a vertical portion incorporating therein a propeller turbine, and means connecting the output from the said turbine to individual drive wheels which support the gas distribution arm.
  • the drive means comprises a rotatable member positioned within the tank above the level of liquid in the tank, and a motor located outside the tank and linked to the rotatable member by means enabling the motor to drive the rotatable member, and the supporting means comprises a torque transmitting cage suspended from the rotatable member and carrying the mixing assembly.
  • FIG. 1 of the accompanying drawings there is shown a closed anaerobic digestion tank indicated generally by the reference numeral 1, the tank comprising a lower digester portion 2 and an upper gas storage portion 3.
  • a mixing assembly indicated generally by the reference numeral 4, which is capable of rotation about a central vertical member 5 the axis of which is concentric with the central vertical axis of the tank 1.
  • the mixing assembly 4 is supported on supporting means constituted by a horizontal wheel 6 which has pivotably mounted beneath its circumference a plurality of vertical wheels 7 which contact the base of the tank 1.
  • the mixing assembly 4 essentially comprises a gas-holding member 8 and a gas distribution arm 9.
  • Both the gas holding member 8 and the gas distribution arm 9 are constituted by inverted channel members.
  • the gas-holding member 8 is arranged in a circle and thus defines an annulus concentric with the axis of the central vertical member 5 and the central vertical axis of the tank 1.
  • the gas distribution arm 9 which is connected to and extends radially from the outer circumference of the gas-holding member 8 includes a plurality of cut-away portions 10 in the lower periphery of its inverted channel member.
  • the cut-away portions 10 may be U-shaped or V-shaped.
  • the gas is supplied to the gas-holding member 8 from the upper gas storage portion 3 of the tank 1 by a pump 11 which pumps gas through a gas delivery duct 12 having an outlet 13 placed vertically beneath a part of the annulus defined by the gas-holding member 8. Accordingly,
  • FIG. 2 An alternative embodiment of the mixing assembly including the gas-holding member 8 and the gas distribution arm 9 is shown in Figure 2 of the accompanying drawings.
  • This includes a horizontally extending arm 21 which is vertically above and substantially parallel to the gas distribution arm 9.
  • the arm 21 is mounted to the central vertical member 5 by bearings 22 similar to the bearings 18 supporting the gas-holding member 8.
  • the gas distribution arm 9 and the arm 21 together support gas lift draught tubes 23 which include a vertical portion 23a which is connected through a right angle bend 23b to a horizontal portion 23c.
  • the gas lift draught tubes 23 also include a lower horizontal portion 23d which terminates in a broader member 23e which has an aperture (not shown) in its lower surface.
  • the gas distribution member 9 of Figure 2 delivers gas into the gas lift tubes 23 which, being immersed in the lower digester portion of the tank, contain liquids and solids material being subjected to anaerobic digestion.
  • the emission of the gas bubbles at the foot of the vertical portions 23a of the gas lift tubes 23 causes liquid-within these vertical portions to be raised vertically with a simultaneous drawing in of further liquid or sludge through the apertures in the lower surfaces of the broader members 23e and discharge of liquid from the upper horizontal portion 23c.
  • a gas lift draught tube 23 positioned on the mixing assembly at the end of the gas distribution arm 9 remote from the central member 5 is advantageously of a greater cross- sectional area than the gas lift draught tube positioned nearer to the central member 5. Any desired number of gas lift draught tubes 23 can be provided in association with the gas distribution arm 9.
  • the mixing assembly of Figure 2 may also be modified by the provision of one or more cut-away portions 10 in the gas distribution arm 9, which cut-away portions are not associated with gas lift draught tubes 23.
  • the mixing assembly of Figure 2 can be mounted on vertical wheels so that the weight of the assembly including the gas distribution arm 9, the horizontal arm 21 and the gas lift draught tubes 23 is supported by the wheels rather than by the central member 5.
  • the mixing assembly of ligure 2 can be supported on bearings located above the level of liquid under treatment, for example the bearings may be out side and above the tank.
  • the gas lift draught tubes 23 could be constructed with only one of the horizontal portions, that is to say either the horizontal portions 23c or the horizontal portion 23d, the reaction force at the single right angle bend in a plurality of gas lift draught tubes mounted on the gas distribution arm 9 being sufficient to move the mixing assembly.
  • gas lift draught tubes 23 of Figure 2 could be provided without any horizontal portions 23c and 23d but with propeller turbines located in the vertical portions 23a with drive means connecting the output from the turbines to vertical wheels supporting the mixing assembly immediately beneath respective gas lift draught tubes 23.
  • FIG. 3 the ⁇ eis shown another embodiment of apparatus according to the present invention, and incorporating a mixing assembly comprising a gas-holding member 8 and a pair of gas distribution arms 9 similar to the gas distribution arm 9 of Figure 1.
  • the central vertical member 5 which is a supporting column of concrete or steel, carries a disc 30 at a level which is below the roof of the tank 1 but above the level of liquid in the tank 1.
  • the disc 30, which is made of the same material as the vertical member 5 is thus located in the upper gas storage portion 3 of the tank 1.
  • the disc 30 constitutes a platform within the tank 1 on which an internally toothed ring gear wheel 31 is mounted on bearings. From the outer periphery 32 of the gear wheel 31 there is suspended, by means of bolts or other suitable fixing means 33, a torque transmission cage 34.
  • the torque transmission cage 34 carries the gas-holding member 8 and the gas distribution arms 9 which are connected to the cage 34 by supporting wires 35.
  • the gas distribution arms 9 are therefor connected directly to the gas-holding member 8 for supply of gas, and also to the cage 34 by the supporting wires 35.
  • the internally toothed ring gear wheel 31 is driven by a gear 38 from a standard reduction gear motor 36 through any suitable gear means 37.
  • the drive for the gear wheel 31 may, conveniently, include a worm and wheel reducer gear.
  • the gas supply to the gas-holding member 8 of Figure 3 is essentially similar to that described with reference to Figure 1.
  • the gas-holding member 8 is provided with four steady bearings 39 of lignum-vitae, or similar material, for maintaining the suspended mixing assembly in position during rotation.
  • Figure 3 has the advantage over that of Figure 1 of accessibility of the supporting means for maintenance and repair.
  • the supporting means could be-external to the tank 1, for example on the roof of the tank 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP78300116A 1977-07-05 1978-07-04 Vorrichtung und Verfahren zur anaeroben Zersetzung von biologisch abbaubarem Abfall Expired EP0000293B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB28183/77A GB1600283A (en) 1977-07-05 1977-07-05 Apparatus for anaerobic digestion of biodegradable waste material
GB2818377 1977-07-05

Publications (2)

Publication Number Publication Date
EP0000293A1 true EP0000293A1 (de) 1979-01-10
EP0000293B1 EP0000293B1 (de) 1982-06-02

Family

ID=10271605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300116A Expired EP0000293B1 (de) 1977-07-05 1978-07-04 Vorrichtung und Verfahren zur anaeroben Zersetzung von biologisch abbaubarem Abfall

Country Status (10)

Country Link
US (1) US4179220A (de)
EP (1) EP0000293B1 (de)
JP (1) JPS5439961A (de)
AU (1) AU519474B2 (de)
CA (1) CA1091369A (de)
DE (1) DE2861875D1 (de)
ES (1) ES471481A1 (de)
GB (1) GB1600283A (de)
IN (1) IN149944B (de)
IT (1) IT1111486B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251370A (en) * 1978-06-26 1981-02-17 Volker Stengelin Device for biological digestion of sewage
WO1990005582A2 (en) * 1988-11-23 1990-05-31 Nytek A/S Mixing device
EP0619136A1 (de) * 1993-03-31 1994-10-12 Kansai Chemical Engineering Co. Ltd Rührerblatt und Rührverfahren
US5785424A (en) * 1993-04-30 1998-07-28 Kansai Chemical Engineering Co. Ltd. Agitator blade having agitators with open first and second ends and inner fabrics therein
US6241381B1 (en) 1997-11-14 2001-06-05 Kansai Chemical Eng. Col. Ltd. Liquid ejection apparatus and liquid ejection method
US6310028B1 (en) 1998-10-09 2001-10-30 Unilever Home & Personal Care, Usa, Division Of Conopco, Inc. Water-softening and detergent compositions containing partially hydrated Na acetate
US6341889B1 (en) 1999-02-22 2002-01-29 Kansai Chemical Eng. Col. Ltd. Method for distributing liquid by controlling rotation speed of a shaft as a function of the liquid depth in a tank
DE10127228A1 (de) * 2001-05-22 2002-12-05 Xaver Lipp Vorrichtung und Verfahren zum Gären organischer Substanzen
US20190002996A1 (en) * 2015-08-06 2019-01-03 Sms Group S.P.A. Plant and method for vacuum degassing liquid steel
CN109433795A (zh) * 2018-11-06 2019-03-08 济源市众帮环境保洁有限公司 一种有机垃圾处理设备系统
EP3456408A1 (de) * 2017-09-13 2019-03-20 Depuracion Biologica Y Bacteriologica de Aguas Residuales, S.L. Anlage zum aufreinigen von schlamm

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JPS58125014U (ja) * 1982-02-18 1983-08-25 呉羽化学工業株式会社 パリソン反転供給装置
JPS58125876U (ja) * 1982-02-18 1983-08-26 ソニー株式会社 発振周波数検出回路
AT378168B (de) * 1982-07-05 1985-06-25 Emde Wilhelm Von Der Vorrichtung zur anaeroben abwasserreinigung
DE3379059D1 (en) * 1982-10-19 1989-03-02 Secr Defence Brit Organometallic chemical vapour deposition of films
US5863119A (en) * 1996-07-03 1999-01-26 J. R. Simplot Company Apparatus for mixing a slurry within a bioreactor vessel
US6207055B1 (en) 1997-06-16 2001-03-27 Idaho Research Foundation, Inc. Method and apparatus for forming a slurry
AU3427899A (en) * 1998-10-12 2000-05-01 Petrojet International Hydrodynamic stirring device and jet pipe
DE102006027031A1 (de) 2006-06-08 2008-01-24 Verink, Johan, Dr.-Ing. Vorrichtung zur Abwasserbehandlung sowie eine mit einer solchen Vorrichtung ausgestattete Anlage
US8366312B1 (en) * 2006-08-01 2013-02-05 United Services Automobile Association (Usaa) Systems to store and agitate fuel
US20100110824A1 (en) * 2007-05-18 2010-05-06 Kabushiki Kaisha Teikoku Denki Seisakusho Dispersion/stirring apparatus and dispersion tank
GB2457681B (en) * 2008-02-21 2013-02-27 Farm Renewable Enviromental Energy Ltd A gas actuated mixing system
WO2012015833A1 (en) 2010-07-27 2012-02-02 WISErg Corporation Methods and systems for processing organic material
US9181138B2 (en) 2013-03-12 2015-11-10 WISErg Corporation Methods and systems for stabilizing organic material
US20190084896A1 (en) * 2017-09-15 2019-03-21 Daniel T. Scott Aerobic Composting System
CN110756096A (zh) * 2019-11-28 2020-02-07 耒阳市旗心电子科技有限公司 一种电子产品生产用物料分散设备
US11732463B1 (en) 2022-04-27 2023-08-22 Modology Design Group Systems and methods for rotating modular housing modules on a trailer bed
CN115539765B (zh) * 2022-08-25 2023-05-23 苏州易合医药有限公司 一种粉末旋转流化装置及其方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887490A (en) * 1932-03-14 1932-11-15 Imhoff Karl Method of and apparatus for the treatment of sludge, sewage, and the like
US2173932A (en) * 1937-02-19 1939-09-26 J W Swanson Septic tank sludge ejector
US2768136A (en) * 1953-12-23 1956-10-23 Pacific Flush Tank Co Gas discharge device for sewage digestion tanks
FR1174321A (fr) * 1957-04-19 1959-03-10 Dorr Oliver Inc Traitement d'eaux d'égouts
FR2099090A5 (en) * 1970-05-15 1972-03-10 Schnyder Hans Continuous liquid gasification using submerged revolving nozzle - arms esp for activated sludge

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US2458061A (en) * 1947-07-12 1949-01-04 Dorr Co Slurry mixer
BE493382A (de) * 1949-05-06
US4100610A (en) * 1975-12-23 1978-07-11 John Blue Company Division Of Subscription Television, Inc. Rotating nozzle sparging system for suspension fertilizer tanks
US4089507A (en) * 1976-03-15 1978-05-16 Sumitomo Heavy Industries, Ltd. Method and apparatus for maintaining uniformity of mixed dust slurry stored in a basin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887490A (en) * 1932-03-14 1932-11-15 Imhoff Karl Method of and apparatus for the treatment of sludge, sewage, and the like
US2173932A (en) * 1937-02-19 1939-09-26 J W Swanson Septic tank sludge ejector
US2768136A (en) * 1953-12-23 1956-10-23 Pacific Flush Tank Co Gas discharge device for sewage digestion tanks
FR1174321A (fr) * 1957-04-19 1959-03-10 Dorr Oliver Inc Traitement d'eaux d'égouts
FR2099090A5 (en) * 1970-05-15 1972-03-10 Schnyder Hans Continuous liquid gasification using submerged revolving nozzle - arms esp for activated sludge

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251370A (en) * 1978-06-26 1981-02-17 Volker Stengelin Device for biological digestion of sewage
WO1990005582A2 (en) * 1988-11-23 1990-05-31 Nytek A/S Mixing device
WO1990005582A3 (en) * 1988-11-23 1990-08-09 Nytek As Mixing device
US5156778A (en) * 1988-11-23 1992-10-20 Nytek A/S Mixing device
EP0619136A1 (de) * 1993-03-31 1994-10-12 Kansai Chemical Engineering Co. Ltd Rührerblatt und Rührverfahren
EP0861685A2 (de) * 1993-03-31 1998-09-02 Kansai Chemical Engineering Co. Ltd Rührer und Verfahren zum Rühren
EP0861685A3 (de) * 1993-03-31 2000-02-09 Kansai Chemical Engineering Co. Ltd Rührer und Verfahren zum Rühren
US5785424A (en) * 1993-04-30 1998-07-28 Kansai Chemical Engineering Co. Ltd. Agitator blade having agitators with open first and second ends and inner fabrics therein
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US6310028B1 (en) 1998-10-09 2001-10-30 Unilever Home & Personal Care, Usa, Division Of Conopco, Inc. Water-softening and detergent compositions containing partially hydrated Na acetate
US6341889B1 (en) 1999-02-22 2002-01-29 Kansai Chemical Eng. Col. Ltd. Method for distributing liquid by controlling rotation speed of a shaft as a function of the liquid depth in a tank
DE10127228A1 (de) * 2001-05-22 2002-12-05 Xaver Lipp Vorrichtung und Verfahren zum Gären organischer Substanzen
DE10127228B4 (de) * 2001-05-22 2005-03-03 Xaver Lipp Vorrichtung und Verfahren zum Gären organischer Substanzen
US20190002996A1 (en) * 2015-08-06 2019-01-03 Sms Group S.P.A. Plant and method for vacuum degassing liquid steel
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DE2861875D1 (en) 1982-07-22
AU3778678A (en) 1980-01-10
IN149944B (de) 1982-06-12
GB1600283A (en) 1981-10-14
EP0000293B1 (de) 1982-06-02
ES471481A1 (es) 1980-12-01
CA1091369A (en) 1980-12-09
JPS6152758B2 (de) 1986-11-14
AU519474B2 (en) 1981-12-03
IT1111486B (it) 1986-01-13
JPS5439961A (en) 1979-03-28
IT7868566A0 (it) 1978-07-04
US4179220A (en) 1979-12-18

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