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WO2016035079A1 - Système d'oxygénation à émulsion d'air - Google Patents

Système d'oxygénation à émulsion d'air Download PDF

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Publication number
WO2016035079A1
WO2016035079A1 PCT/IL2015/050886 IL2015050886W WO2016035079A1 WO 2016035079 A1 WO2016035079 A1 WO 2016035079A1 IL 2015050886 W IL2015050886 W IL 2015050886W WO 2016035079 A1 WO2016035079 A1 WO 2016035079A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
waste water
pipe
oxygenating
ascending pipe
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.)
Ceased
Application number
PCT/IL2015/050886
Other languages
English (en)
Inventor
Joseph Atzmon
Tomer ATZMON
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.)
Atz Tech Ltd
Original Assignee
Atz Tech 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 Atz Tech Ltd filed Critical Atz Tech Ltd
Priority to CN201580059898.2A priority Critical patent/CN107206332A/zh
Publication of WO2016035079A1 publication Critical patent/WO2016035079A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/18—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from the liquid to be pumped
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
    • 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
    • B01F35/32065—Wind driven
    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • C02F3/085—Fluidized beds
    • 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
    • C02F3/206—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with helical screw impellers
    • 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
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • 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
    • C02F3/24—Activated sludge processes using free-fall aeration or spraying
    • 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 refers to a wastewater treatment system and more particularly to an airlift oxygenating device.
  • US 7267328 discloses a submerged airlift pump using multiple concentric pipes with diameters that increase as they near the water surface. Water initially accelerated into the lowest pipe section is progressively decelerated in subsequent pipe sections, increasing the residence time of the bubbles and hence the total driving force of the pump. Pipe proportions are optimized with gas flows to maximize total pump discharge at extremely low pumping-heads, resulting in ultra-high pumping efficiencies. This device can be used to promote circulation of large volumes of deep pond water, deficient in oxygen, to the surface, creating an increase in the exchange of gases between the atmosphere and water with minimal energy requirements.
  • US 8596989 discloses the dual injection airlift pump having a hollow tubular body through which the liquid being pumped passes upward from the lower intake end to the upper outlet end. Air or other gas is injected into the liquid in the pump body, the less dense gas adding buoyancy to the liquid and entraining the liquid to rise toward the outlet end.
  • the dual injection airlift pump includes two air injection stages, with the first or lower stage having a perforated interior sleeve allowing the gas to pass therethrough to be injected radially into the liquid.
  • the second, upper stage has an impervious sleeve defining a gap between the sleeve and the interior surface of the pump wall, the lower end being sealed and the upper end open. Air is injected between the sleeve and pump wall, the air exiting at the upper or downstream end in an axially peripheral flow pattern.
  • US 8056887 discloses a surface aerator for mixing gas and liquid.
  • the surface aerator has an upwardly pumping impeller located within a draft tube.
  • a flow diverter redirects pumped liquid from the impeller traveling in an upward direction to a radially outward direction where it impacts and aerates the remaining liquid in a vessel.
  • a baffle extends radially at a shallow depth to a point beyond the impact area of the liquid to provide separation of the impact area from the rest of the liquid and promote aeration.
  • the aforesaid system comprises (a) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (b) an air dispenser disposed within the pipe member connectable to a source of a compressed air; and (c) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water.
  • the first member is rotatable relative to the second member.
  • Another object of the invention is to disclose one of the members defining the passage which is a rotor member having a shaft.
  • the rotor is rotatable around the shaft.
  • a further object of the invention is to disclose the rotor member rotatable by kinetic energy of air-saturated-water flow within the ascending pipe member from the air diffuser to the waste water level applied to the ribs acting as turbine blades.
  • a further object of the invention is to disclose the rotor member provided with a power spring and rotatable in an oscillatory manner by the spring.
  • a further object of the invention is to disclose the sprinkler head having a hollow housing provided with a mounting slot configured for receiving the rotor member and freely rotating the shaft there within.
  • a further object of the invention is to disclose the shaft is spring-biased such that the rotor is upward displaceable under elevated airlifted water to be cleaned from clogs within the sprinkler head.
  • a further object of the invention is to disclose the mounting slot carried within the hollow housing by members projecting into the hollow housing.
  • a further object of the invention is to disclose an orientation of the ribs selected from a group consisting of a radial orientation and a spiral orientation.
  • a further object of the invention is to disclose the sprinkler head suspended to at least one floating member.
  • a further object of the invention is to disclose the floating member which is a pipe connecting the system to a compressed air.
  • a further object of the invention is to disclose the system comprising an adaptor for a quick connection to an existing air diffuser disposed on a bed of a wastewater basin.
  • a further object of the invention is to disclose the ascending pipe provided at the lower portion with an inlet mesh screen.
  • a further object of the invention is to disclose the ascending flexible or collapsible (bellows) pipe is air-permeable.
  • the ascending pipe conducts compressed air which is exhausted from the ascending pipe between strap coils.
  • a further object of the invention is to disclose the ascending pipe member comprises an air diffuser further comprising a hollow perforated ring-like member fluidly connected to the source of compressed air; the hollow perforated ring-like member is disposed between internal and external mesh ring screens such that air from the hollow perforated ring-like member is exhausted inside and outside of the ascending pipe member.
  • a further object of the invention is to disclose the air dispenser disposed within the pipe member comprises a hollow perforated ring-like member fluidly connected to the source of compressed air; the hollow perforated ring-like member is disposed between internal and external mesh ring screens such that air from the hollow ring-like member is exhausted inside and outside of the air dispenser.
  • the internal space of the air dispenser is filled by a porous member diffusing the exhausted air.
  • a further object of the invention is to disclose the system comprising a wind-propelled water pump.
  • a further object of the invention is to disclose the water pump which is a screw pump.
  • a further object of the invention is to disclose an MBBR airlift oxygenating system for waste water treatment bioreactors.
  • the aforesaid system comprises (a) an ascending pipe member inserted into the bioreactor comprising biofilm carriers suspended within waste water to be treated; the pipe having lower and upper portions; (b) an air dispenser disposed within the pipe member connectable to a source of a compressed air; said air dispenser providing air bubbles within said ascending pipe member ;(c) an oxygenating mesh collar connected to said upper portion of ascending pipe member said oxygenating mesh collar configured for exposing said biofilm carriers airlifted thereupon ot ambient air; (d) a floating member holding said oxygenating mesh collar above a waste water level.
  • a further object of the invention is to disclose the system comprising a mesh screen defining a space around the MBBR airlift oxygenating system such that biofilm carrier suspended in are localized within the screen.
  • a further object of the invention is to disclose a multistage bioreactor for microbiological treatment of wastewater.
  • the aforesaid reactor comprises (a) a basin accommodating waste water to be treated; (b) a plurality of treatment cells within the basin successively fluidly connected to each other such that the waste water is flushed through the cells; (c) oxygenating means configured for injecting air into the waste water and disposed within at least one treatment cell; the oxygenating means further comprising at least one sprinkler comprising (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air diffuser disposed within the lower portion of the pipe member; (iii) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water; and (d) plurality of substrates for supporting a biomass layer; each substrate comprises a mesh layer for forming superficial environment conducive for supporting biomass growth.
  • a further object of the invention is to disclose a method of airlift oxygenating waste water treatment bioreactors.
  • the aforesaid method comprises the steps of: (a) providing at least one airlift oxygenating system comprising an airlift oxygenating system for waste water treatment bioreactors comprising: (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air dispenser disposed within the pipe member; (iii) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water; (b) mounting the airlift oxygenating system within bioreactor; (c) feeding the diffuser with compressed air; (d) lifting fed air along the ascending pipe member; (e) conducting lifted air through the slit-like passage; and (f) turbulizing the lifted air within the slit-like passage in order to increase an area of air- waste water contact.
  • a further object of the invention is to disclose a method of MBBR airlift oxygenating waste water treatment bioreactors.
  • the aforesaid method comprises the steps of: (a) providing at least one airlift oxygenating system comprising an airlift oxygenating system for waste water treatment bioreactors comprising: (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air dispenser disposed within the pipe member connectable to a source of a compressed air; (iii) an oxygenating mesh collar; (b) mounting the airlift oxygenating system within bioreactor; (c) feeding the diffuser with compressed air; (d) lifting fed air along the ascending pipe member; (e) conducting lifted air through the slit-like passage; and (f) oxygenating biofilm carrier by ambient air on the mesh collar.
  • a further object of the invention is to disclose a method of multistage microbiological treatment of wastewater, the method comprising the steps of: (a) constructing a basin for accommodating waste water to be treated; (b) providing a multistage bioreactor further comprising (i) a basin accommodating waste water to be treated; (ii) a plurality of treatment cells within the basin successively fluidly connected to each other such that the waste water is flushed through the cells; (iii) oxygenating means configured for injecting air into the waste water and disposed within at least one treatment cell; the oxygenating means further comprising at least one sprinkler comprising (1) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (2) an air diffuser disposed within the lower portion of the pipe member; (3) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water; (iv) plurality of substrates for supporting a biomass layer; each substrate comprises a mesh layer for forming superficial environment conducive for supporting biomass
  • Figs la and lb are schematic cross-sectional views of a waste water treatment multistag bioreactor;
  • Fig. 2 is an isometric view of a wind-propelled oxygenation device;
  • Figs 3a and 3b are cross sectional views of a head of wind-propelled oxygenation device
  • Figs 4a to 4d are cross sectional views of a spring-operated oscillating airlift oxygenation head
  • Figs 5 a and 5b are a cross-sectional view of an airlift oxygenation head provided with turbulizing external pins and an enlarged view of the pins;
  • Figs 6a and 6b are external and cross-sectional views of an airlift oxygenation device provided with an inlet mesh screen;
  • Figs 7a to 7d are external and cross-sectional views of an airlift oxygenation device with an overhead rotor
  • Fig. 8 is an external view of an airlift oxygenation device connectable to a bed-disposed air diffuser
  • Figs 9a to 9c are an external view of an MBBR airlift oxygenation device with a mesh collar and enlarged views thereof;
  • Figs 10a and 10b are cross-sectional views of an oxygenation device having a wind- propelled drive
  • Figs 11a and 1 lb are external and cross-sectional views of an external air diffuser
  • Fig 12 is a cross-sectional view of an internal air diffuser
  • Figs 13a and 13b are cross-sectional and internal isometric views of an MBBR airlift oxygenation device provided with a mesh screen;
  • Fig. 14 is a cross-sectional view of an MBBR airlift oxygenation device with a wind- propelled drive.
  • the present invention is based on kinetic energy of air bubbles freed underwater and rising above the water surface.
  • the formed air-water mixture propels a sprinkler turbine wheel of the present invention.
  • Figs la and lb presenting a waste water treatment bioreactor 200.
  • Waste water 230 flows into the bioreactor 200 from an input pipe 220.
  • Numeral 240 refers to waste water level.
  • Biofilm is carried on substrates 250 which are secured within cages secured to a bioreactor bed 210 (Fig. la). Waste water contained in the bioreactor 200 is aerated by means of the airlift oxygenation devices 100 which are fed by compressed air from a floating manifold 260 via air pipes 280. Waste water is sprinkled at a height over water level 240.
  • the manifold 260 is anchored by means of an anchoring weight 270.
  • Air feeding piping mechanically anchored to the bioreactor bed 210 is also in the scope of the present invention.
  • biofilm substrates are suspended to buoyant members 265.
  • An advantage of airlift oxidation devices of the present invention is in providing waste water drops having significantly greater surface area of contact with oxygen contained in ambient air. Extended surface increases efficiency of oxidation process.
  • gravel body 290 is elevated over a wastewater level 240 provides more effective oxidation of water sprinkled by airlift oxygenation devices 100 due to extended time of the sprinkled water with oxygen of the ambient air. Sprinkled water is in contact with oxygen while the water flows down from the gravel body back into the bioreactor 200.
  • FIG. 2 showing exemplar wind-propelled oxygenation device 300.
  • Device 300 comprises piping 330 filled with air and functioning as buoyant members carrying wind-propelled wheels 310 and vertical pipes 320. Detailed description of the device 300 is below.
  • Numeral 10 refers to waste water level.
  • Figs 3 a and 3b showing air-propelled sprinkler 400.
  • Wind- propelled wheel 310 has blades 450 disposed between two plates 460. Water pressure is produced by screw pump 430 driven by wheel 310 or due to airlift effect. Water is splashed up by a conical sprinkling member 440..
  • sprinkler 400 has n alternative operation modes implemented by diffuser 420 dispensing pressurized air and screw pump 430 which are used according to atmospheric conditions.
  • An air blower feeding diffuser 420 can be energized by photovoltaic array or photovoltaic battery is also in scope of the present invention. All drive means can be also used conjointly.
  • Figs 4a to 4d showing sprinklers 500 and 500a provided with ribbed rotor 520.
  • the aforesaid rotor is mounted within tube 510. Pressurized air is fed by pipe 540 and dispensed into internal volume of tube 510.
  • Numeral 550 refers to air bubbles within tube 510.
  • the pressure created by an airlift effect rotates ribbed rotor 520 around shaft 530.
  • Rotor 520 is nutted up by nut 570.
  • sprinklers 500 and 500a are of an impact type. Specifically, spring 560 oscillates rotor 520 which is under rotating torque of airlifted water flow impacting rotor ribs 525 (as indicated by numeral 508).
  • Oscillation amplitude is indicated as angle a.
  • the airlifted water flow is spiraled within canals defined by ribs 515 of tube 510. Oscillations of rotor 520 are restricted by stopper 512.
  • Numeral 590 refers to supporting frame. Waste water drops are dispensed in directions indicated by numeral 507.
  • Figs 5a and 5b showing sprinkler 500b provided with pins 615.
  • Sprinkler 500b is similar to the abovementioned ones.
  • Numeral 536 refers to a quick connector of sprinkler 500b to the system. Rotor is rotated by airlifted flow thereat spring 620 presses against rotor 520 such that water pressure is balanced by spring. Higher pressure of water causes a wider gap between rotor 520 and tube 610. The sprinkler can be opened due to compression of spring 620 and cleaned.
  • Figs 6a and 6b showing sprinkler 500c including a head 700, an ascending flexible or collapsible pipe (bellows) 701, mesh screen 702 preventing biofilm carriers used in MBBR technology from entering into the ascending pipe and weight 703 keeping the ascending pipe in a vertical position.
  • Air is dispensed by an air dispenser 704.
  • FIG. 7a to 7f showing sprinkler head 700 having external rotor 740 nutted up by nut 755 to shaft 750.
  • the aforesaid shaft is inserted into a bore with spring pin 751.
  • Shaft 750 is fastened by locking ring 752.
  • Article 730 is static and has a parabolic shape provided with channels which spirals water flow airlifted within pipe 505.
  • the airlifted water is compressed with passing through a gap between pipe 505 and parabolic article 730.
  • the airlifted water flow impacts turbine blades 760 of rotor 740 such that the water flow splashes up around the sprinkler.
  • forces impacting turbine blades are directed radially in an absolutely balanced manner. In other words, external rotor 740 is not exposed to any unbalanced force and as a result, resistance to rolling in in the present embodiment is minimal.
  • rotor 740 is lifted by elevated pressure of air fed into sprinkler head 700. Specifically, rotor 740 being pressed by compressed air pulls shaft 750. Vertical retrogressive displacement is achieved due to compression of spring 751 within housing 757. Numeral 756 refers to o-ring disposed at shaft 750.
  • parabolic member 730 In the operation mode, parabolic member 730 is tightly adjoins to pipe 505. Minimal distance between parabolic member 730 and housing 757 is T. when compressed fluid (gas or liquid) pressure is fed via pipe 758, shaft 750 is displaced up by distance a and clogs within the sprinkler head 70 are removed. In this case, the distance between parabolic member 730 and pipe 505 is T+a.
  • FIG. 8 showing embodiment 800 of the airlift oxidation device connectable to existing air diffuser 840 fed by air piping 850.
  • Ascending pipe member 805 is provided with cone 820 connectable to air diffuser by means of flat spring 830.
  • Sprinkler 730 is held on a surface 10 of wastewater by buoyant member 810.
  • FIGs 9a to 9c showing an MBBR airlift oxygenation device.
  • An ascending pipe wrapped with strap 701 is connected to air diffuser 840 fed by piping 850.
  • An upper portion of the ascending pipe wrapped with strap 701 is provided with mesh collar 860.
  • Biofilm carriers 870 suspended in the waste water according to Moving Bed Biofilm Reactor (MBBR) technology are brought onto mesh collar 860 and exposed to the ambient air there some time. At this time period, the aforesaid biofilm carried by members 870 are intensively oxidized by oxygen of ambient air.
  • Collar 860 is held on a surface 10 of wastewater by buoyant member 810.
  • FIGs 10a and 10b showing an MBBR airlift oxygenation device provided with wind-propelled screw pump 430.
  • Screw pump 430 is driven by a turbine wheel 310.
  • the device in Fig. 10b is provided with supporting frame 880.
  • Air blower feeding diffuser 420 can be energized by photovoltaic array or photovoltaic battery is also in scope of the present invention. All drive means can be used conjointly.
  • Figs 11a and l ib showing an air dispenser 900 providing both external and internal exhausting of air.
  • the dispenser 900 is mechanically connected to ascending pipe 505 and includes hollow perforated ring-like member 930 disposed between internal and external mesh rings 910 and 920, respectively.
  • Pipe 940 interconnects hollow perforated ring-like member 930 with a compressed air source.
  • FIG. 12 showing an air dispenser 900a designed for using within ascending pipe 505.
  • the device 900a is fed with air by means of pipe 505.
  • internal space of dispenser 900a is filled with a porous material such foam.
  • Figs 13a and 13b showing localized MBBR airlift oxygenation device 1000.
  • the aforesaid device is characterized by establishing a closed space where biofilm carriers are suspended. This space is defined by mesh screen 1010.
  • the biofilm carriers (not shown) are air lifted onto mesh collar by air dispenser 900a located within ascending pipe member 905. Dispenser 900a is fed with air via pipes 905 and 908.
  • Device 1000 is held afloat by member 810.
  • FIG. 14 showing embodiment 1000a of the localized MBBR airlift oxygenation device.
  • the aforesaid device is provided with screw pump 430 driven by a turbine wheel 310.
  • Electric motor drive energized by photovoltaic array or photovoltaic battery is also in scope of the present invention. All drive means can be used conjointly.
  • an airlift oxygenating system for waste water treatment bioreactors is disclosed.
  • the aforesaid system comprises (a) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (b) an air dispenser disposed within the pipe member connectable to a source of a compressed air; and (c) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water.
  • It is a core feature of the invention to provide the sprinkler head comprising a slit-like passage defined by a first member and a second member provided with ribs projecting into the passage and configured for turbulizing a stream of the air-saturated water.
  • the first member is rotatable relative to the second member.
  • one of the members defining the passage which is a rotor member having a shaft.
  • the rotor is rotatable around a the shaft.
  • the rotor member is rotatable by kinetic energy of air-saturated-water flow within the ascending pipe member from the air diffuser to the waste water level applied to the ribs acting as turbine blades.
  • the rotor member is provided with a power spring and rotatable in an oscillatory manner by the spring.
  • the sprinkler head has a hollow housing provided with a mounting slot configured for receiving the rotor member and freely rotating the shaft therewithin.
  • the shaft is spring-biased such that the rotor is upward displaceable under elevated airlifted water to be cleaned from clogs within the sprinkler head.
  • the mounting slot is carried within the hollow housing by members projecting into the hollow housing.
  • an orientation of the ribs is selected from a group consisting of a radial orientation and a spiral orientation.
  • the sprinkler head is suspended to at least one floating member.
  • the floating member is a pipe connecting the system to a compressed air.
  • the system comprises an adaptor for a quick connection to an existing air diffuser disposed on a bed of a wastewater basin.
  • the ascending pipe is provided at the lower portion with an inlet mesh screen.
  • the ascending pipe is air permeable.
  • the ascending flexible or collapsible (bellows) pipe conducts compressed air which is exhausted from the ascending pipe.
  • the ascending pipe member comprises an air diffuser further comprising a hollow perforated ring-like member fluidly connected to the source of compressed air; the hollow perforated ring-like member is disposed between internal and external mesh ring screens such that air from the hollow perforated ring-like member is exhausted inside and outside of the ascending pipe member.
  • the air dispenser disposed within the pipe member comprises a hollow perforated ring-like member fluidly connected to the source of compressed air; the hollow perforated ring-like member is disposed between internal and external mesh ring screens such that air from the hollow perforated ring-like member is exhausted inside and outside of the air dispenser.
  • the internal space of the air dispenser is filled by a porous member diffusing the exhausted air.
  • the system comprises a wind-propelled water pump.
  • the water pump is a screw pump.
  • an MBBR airlift oxygenating system for waste water treatment bioreactors comprises (a) an ascending pipe member inserted into the bioreactor comprising biofilm carriers suspended within waste water to be treated; the pipe having lower and upper portions; (b) an air dispenser disposed within the pipe member connectable to a source of a compressed air; said air dispenser providing air bubbles within said ascending pipe member; (c) an oxygenating mesh collar connected to said upper portion of ascending pipe member said oxygenating mesh collar configured for exposing said biofilm carriers airlifted thereupon to ambient air; (d) a floating member holding said oxygenating mesh collar above a waste water level.
  • the system comprises a mesh screen defining a space around the MBBR airlift oxygenating system such that biofilm carrier suspended in are localized within the screen.
  • a multistage bioreactor for microbiological treatment of wastewater comprises (a) a basin accommodating waste water to be treated; (b) a plurality of treatment cells within the basin successively fluidly connected to each other such that the waste water is flushed through the cells; (c) oxygenating means configured for injecting air into the waste water and disposed within at least one treatment cell; the oxygenating means further comprising at least one sprinkler comprising (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air diffuser disposed within the lower portion of the pipe member; (iii) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air- saturated water; and (d) plurality of substrates for supporting a biomass layer; each substrate comprises a mesh layer for forming superficial environment conducive for supporting biomass growth.
  • a method of airlift oxygenating waste water treatment bioreactors comprises the steps of: (a) providing at least one airlift oxygenating system comprising an airlift oxygenating system for waste water treatment bioreactors comprising: (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air dispenser disposed within the pipe member; (iii) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water; (b) mounting the airlift oxygenating system within bioreactor; (c) feeding the diffuser with compressed air; (d) lifting fed air along the ascending pipe member; (e) conducting lifted air through the slit-like passage; and (f) turbulizing the lifted air within the slit-like passage in order to increase an area of air- waste water contact.
  • a method of MBBR airlift oxygenating waste water treatment bioreactors comprises the steps of: (a) providing at least one airlift oxygenating system comprising an airlift oxygenating system for waste water treatment bioreactors comprising: (i) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (ii) an air dispenser disposed within the pipe member connectable to a source of a compressed air; (iii) an oxygenating mesh collar; (b) mounting the airlift oxygenating system within bioreactor; (c) feeding the diffuser with compressed air; (d) lifting fed air along the ascending pipe member; (e) conducting lifted air through the slit-like passage; and (f) oxygenating biofilm carrier by ambient air on the mesh collar.
  • a method of multistage microbiological treatment of wastewater comprises the steps of: (a) constructing a basin for accommodating waste water to be treated; (b) providing a multistage bioreactor further comprising (i) a basin accommodating waste water to be treated; (ii) a plurality of treatment cells within the basin successively fluidly connected to each other such that the waste water is flushed through the cells; (iii) oxygenating means configured for injecting air into the waste water and disposed within at least one treatment cell; the oxygenating means further comprising at least one sprinkler comprising (1) an ascending pipe member inserted into the bioreactor; the pipe having lower and upper portions; (2) an air diffuser disposed within the lower portion of the pipe member; (3) a sprinkler head connected to the upper portion of the pipe member above a waste water level and configured for dispensing air-saturated water; (iv) plurality of substrates for supporting a biomass layer; each substrate comprises a mesh layer for

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

La présente invention concerne un système d'oxygénation à émulsion d'air pour des bioréacteurs de traitement des eaux usées qui comprend (a) un élément de tuyau ascendant inséré dans le bioréacteur ; le tuyau ayant des parties inférieure et supérieure ; (b) un distributeur d'air disposé à l'intérieur de l'élément de tuyau ; et (c) une tête d'arroseur raccordée à la partie supérieure de l'élément de tuyau au-dessus d'un niveau d'eaux usées et configurée pour distribuer de l'eau saturée d'air. La tête d'arroseur comprend un passage en forme de fente défini par un premier élément et un deuxième élément pourvus de nervures faisant saillie dans le passage et configurées pour rendre turbulent un flux d'eau saturé d'air. Le premier élément est rotatif par rapport au deuxième élément.
PCT/IL2015/050886 2014-09-03 2015-09-03 Système d'oxygénation à émulsion d'air Ceased WO2016035079A1 (fr)

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CN201580059898.2A CN107206332A (zh) 2014-09-03 2015-09-03 气升式充氧系统

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US62/045,070 2014-09-03

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Cited By (3)

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CN111977817A (zh) * 2020-08-28 2020-11-24 湖南文理学院 一种扬水式充氧生态景观修复装置
CN116444056A (zh) * 2023-04-19 2023-07-18 马安然 一种微动力自充氧生化处理装置
US12116291B1 (en) * 2023-05-22 2024-10-15 Kimball Water & Energy LLC Water restoration system

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JP6583447B2 (ja) * 2018-02-20 2019-10-02 株式会社明電舎 気泡発生装置
CN111498983A (zh) * 2020-04-22 2020-08-07 图方便（苏州）环保科技有限公司 一种基于mbbr污水处理用过滤装置及处理方法

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CN111977817A (zh) * 2020-08-28 2020-11-24 湖南文理学院 一种扬水式充氧生态景观修复装置
CN116444056A (zh) * 2023-04-19 2023-07-18 马安然 一种微动力自充氧生化处理装置
US12116291B1 (en) * 2023-05-22 2024-10-15 Kimball Water & Energy LLC Water restoration system

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