CN102557233A - Film Separation Bio-treatment Device - Google Patents

Film Separation Bio-treatment Device Download PDF

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Publication number
CN102557233A
CN102557233A CN2011103633854A CN201110363385A CN102557233A CN 102557233 A CN102557233 A CN 102557233A CN 2011103633854 A CN2011103633854 A CN 2011103633854A CN 201110363385 A CN201110363385 A CN 201110363385A CN 102557233 A CN102557233 A CN 102557233A
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China
Prior art keywords
film
membrane sepn
draining
treatment device
pump
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Pending
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CN2011103633854A
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Chinese (zh)
Inventor
永森泰彦
足利伸行
中山芳夫
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Toshiba Corp
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Toshiba Corp
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Publication of CN102557233A publication Critical patent/CN102557233A/en
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    • 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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  • Separation Using Semi-Permeable Membranes (AREA)
  • Activated Sludge Processes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

A film separation bio-treatment device according to the embodiment is provided with a storage tank, a pump and an injector. The storage tank is internally provided with: microbes which perform bio-treatment on the organic matter in discharged water, and a film which separates the discharged water into treatment water and mud. The pump generates transversely flowing water flow for the film surface. The injector is provided an injection-out side of the pump and sucks and mixes the air into the water flow which is generated by the pump.

Description

The membrane sepn biological treatment device
On November 16th, 2010) and enjoy the right of priority of this application the application is based on the japanese application 2010-255713 (applying date:.This through with reference to this formerly application documents comprise the full content of this application.
Technical field
Embodiment of the present invention relates to a kind of membrane sepn biological treatment device that the sewage that contains the organic matter of being sick of is handled.
Background technology
In following water treatment employed activated sludge method or in sludge treatment employed lonely property facture (the property digestion method of perhaps being sick of), be to use mikrobe the organism in draining or the dirt to be decomposed and the method for removing.In order to make the highly-efficient treatmentization of this use mikrobe, need to improve the microorganism concn in the biological reaction tank.
As one of method that improves microorganism concn, the partition method (film separated activated sludge method) of having utilized film is by practicability.The applied general interior microorganism concn of biological reaction tank of following water treatment is 3000mg/l; Relative therewith; Microorganism concn in the film separated activated sludge method in the biological reaction tank can simmer down to 8000～10000mg/l, therefore has the advantage that can access limpid treating water.
But because through film separating treatment water from draining, so film stops up owing to the organism in the draining or mud.In order to prevent film, generally take the method for cleaning the air of usefulness, cleaning through the shearing force of thick bubble when face rises from the underfeed of film unit by organism or sludge blockage.On the other hand, in the film clean, utilize under the situation of aeration, need about 5 times air capacity of aeration required air quantity in biological treatment, therefore need huge power.Therefore, all the time, in the film separated activated sludge method, the method that various films clean has been proposed in order to cut down the power in the film cleaning.
In the film separated activated sludge method, filter the moving of thickened sludge liquid that obtains and carry out through aeration with the cleaning on film surface, therefore need huge power.In addition, there is following problem: in cleaning, make aeration become under the uneven situation, pile up mud on the part on film surface, thereby membrane area is reduced in be provided with precision or obstruction because of diffuser based on aeration.
And, if main equipment, then need be through strengthening the film size or film is made as multistage being impregnated in the darker case of the depth of water, improve the aeration that is used to be provided with ejection pressure with gas blower, thus aeration further increases with the power consumption of gas blower.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of membrane sepn biological treatment device that can carry out the mobile of mud and the cleaning on film surface with less power.
The membrane sepn biological treatment device of embodiment possesses storage tank, pump and injector.In storage tank, the film that is built-in with mikrobe that the organism in the draining is carried out a biological disposal upon and draining is separated into treating water and mud.Pump produces the current of crossing current (cross flow) to face.Injector is arranged on the ejection side of pump, and gas is attracted to be mixed in the current that produced by pump.
According to the membrane sepn biological treatment device of said structure, can carry out the cleaning surperficial of moving of mud with less power with film.
Description of drawings
Fig. 1 is the sectional view of the membrane sepn biological treatment device of explanation first embodiment.
Fig. 2 is the sectional view of the membrane sepn biological treatment device of explanation second embodiment.
Embodiment
Below, use accompanying drawing that the membrane sepn biological treatment device of each embodiment is described.The membrane sepn biological treatment device of each embodiment is to utilize mikrobe the organism in the draining to be carried out a biological disposal upon and the draining after the biological treatment is carried out membrane sepn and obtained the device of treating water.
< first embodiment >
As shown in Figure 1, among the membrane sepn biological treatment device 1a of first embodiment, membrane sepn groove 10 is connected through circulation line 12 with mud circulation groove 11.Membrane sepn groove 10 forms air-tight state with mud circulation groove 11.In mud circulation groove 11, there is the mikrobe that the organism in the draining is carried out a biological disposal upon, the draining after in mud circulation groove 11, being processed is sent to membrane sepn groove 10.In membrane sepn groove 10, draining is separated into treating water and thickened sludge through membrane sepn.Isolated thickened sludge is sent to mud circulation groove 11 through circulation line 12.
In mud circulation groove 11, flow into draining via draining supply-pipe L1, and flow into the thickened sludge that in membrane sepn groove 10, obtains via circulation line 12, stockpile the draining that has mixed thickened sludge.On mud circulation groove 11, dispose the influx of the first induction pipe L2 with pump 15 and valve 16.When valve 16 is open mode, via the first induction pipe L2 membrane sepn groove 10 is delivered in the draining in the mud circulation groove 11 through pump 15.
In membrane sepn groove 10, be built-in with the injector 18 that is connected with the first induction pipe L2; The second induction pipe L3 that is connected with injector 18; The air-supply duct 19 that is connected with injector 18; And film unit 13 with a plurality of flat films.
Draining via the first induction pipe L2 sends here from mud circulation groove 11 when valve 16 is open mode, is imported in the film unit 13 via the injector 18 and the second induction pipe L3.When injector 18 is open mode at valve 20, attract the gas of generations membrane sepn groove 10 in via air-supply duct 19, the gas that makes attraction mixes with draining as bubble and imports film unit 13.For example, in membrane sepn groove 10 and mud circulation groove 11, have the gases such as methane gas that produce through biological treatment, superfluous gas is discharged from membrane sepn groove 10 and mud circulation groove 11 via vapor pipe L5.
In film unit 13, the draining that flows into via the second induction pipe L3 from the bottom is risen and is filtered with the crossing current mode by flat film 14.Therefore, pump 15 need send water in film unit 13, flat film 14 is formed the such pressure of current that flows over when draining is sent into.The relief outlet of the second induction pipe L3 so that the current of the draining of sending into by pump 15 form with respect to the mode that flat film 14 becomes crossing current.
Treating water through flat film 14 obtains flows out from membrane sepn groove 10 via treating water vent pipe L4 when valve 22 is open mode.Residual thickened sludge then imports to mud circulation groove 11 via circulation line 12 through overflow (over flow) if flow out from the top of film unit 13 in membrane sepn groove 10 after from draining, having separated treating water through flat film 14.
Surface at the flat film 14 of film unit 13; Mud in the draining becomes filter cake and piles up; But can suppress the accumulation of mud through the laminar flow of crossing current, perhaps be utilized in the turbulent flow (injection stream) of sneaking into bubble in the current of crossing current and producing mud is peeled off from flat film 14 to flat film 14.Here, the size of injector 18 blended bubbles does not limit, and preferably is easy to generate the size of turbulent flow.
Timing according to the clean of the timing of filtration treatment or flat film 14; Each valve 16,20,22 is opened and closed through corresponding respectively motor 17,21,23, can improve mud peeling off effect and suppressing the inhibition effect that mud is piled up to flat film 14 thus from flat film 14.
For example, in membrane sepn biological treatment device 1a, in filter process, the valve 16 on the first induction pipe L2 is opened, the valve on the air-supply duct 19 20 is cut out, the draining that does not contain bubble is gone in the film unit 13 with quick conductance through motor 21 through motor 17.In addition, the valve 22 on the treating water vent pipe L4 is opened, the treating water that filtration obtains that passes through in the film unit 13 is seen off from membrane sepn groove 10 through motor 23.In this case, the draining that imports in the film unit 13 does not become turbulent flow and becomes laminar flow, therefore can suppress the generation of lip-deep concentration polarization layer of film or gel coat, promptly can suppress the accumulation of mud to 14 of flat films.
In addition; For example in membrane sepn biological treatment device 1a, in the clean process of flat film 14, the valve 16 on the first induction pipe L2 is opened through motor 17; Through motor 21 valve on the air-supply duct 19 20 is opened, the draining that will contain bubble imports in the film unit 13.In addition, the valve 22 on the treating water vent pipe L4 cuts out, make from film unit 13 interior treating water discharges to stop through motor 23.In this case, through in the current of crossing current, sneaking into bubble, in film unit 13, produce turbulent flow thus, this turbulent flow makes flat film 14 vibrations, can effectively the filter cake of putting down film 14 surfaces be peeled off thus.
In membrane sepn biological treatment device 1a; The pressure-losses from pump 15; Have only the pressure-losses that the throttling of injector 18 causes and the pressure-losses in the crossing current water route between a plurality of flat film 14; Are the circulations between the same depth of water from membrane sepn groove 10 to mud circulation groove 11, therefore do not have the pressure-losses that causes because of waterhead.Therefore, total pressure-losses is minimum.Because the pressure-losses is less, so pump 15 needed power tail off, and compare with the situation of cleaning through aeration and also can reduce power consumption.
For example, be that 5m, membrane area are 150m in the depth of water 2The situation of film under, when utilizing aeration to clean as in the past, the aeration air quantity need be 1.5～2.0m 3/ min, the power of aeration blower need be 2.7kW.Relative therewith, in membrane sepn biological treatment device 1a,,, realized quantity of circulating water 11m through about 2.2kW in order to obtain same performance for the film of same depth of water 5m, membrane area 3/ min, bubble flow 0.7m 3/ min, total 1.7m 3The crossing current of/min.
As stated, in membrane sepn biological treatment device 1a, can suppress the accumulation of mud on flat film 14, and can peel off through the mud that turbulent flow will be piled up on flat film 14 through the laminar flow that in film unit 13, produces.Thus, can carry out the cleaning surperficial of moving of mud with the power littler than aeration with film.
In addition; In above-mentioned first embodiment; Explained that injector 18 attracts via 19 pairs of gases that in membrane sepn groove 10, produce of air-supply duct and makes it be mixed into the situation in the draining, but the gas that injector 18 attracts need not be defined as the gas in the membrane sepn groove 10.
< second embodiment >
As shown in Figure 2, the membrane sepn biological treatment device 1b of second embodiment compares with the membrane sepn biological treatment device 1a of above-mentioned first embodiment, and difference is in same groove, to carry out a biological disposal upon and membrane sepn.That is, membrane sepn biological treatment device 1b does not possess mud circulation groove 11, and L1 flows directly into draining in membrane sepn groove 10 from the draining supply-pipe.Therefore, in this membrane sepn biological treatment device 1b, in membrane sepn groove 10, there is the mikrobe that the organism in the draining is handled.In addition, in membrane sepn biological treatment device 1b, pump 15 is configured in membrane sepn groove 10, be connected with injector 18, and membrane sepn groove 10 inner sewage are imported film unit 13 via the second induction pipe L3.
In the film unit 13 of membrane sepn biological treatment device 1b, the draining that flows into from the bottom is risen and is put down the treating water after film 14 filters with the crossing current mode, flows out via treating water vent pipe L4.From draining, separated residual thickened sludge after the treating water through flat film 14, flowed out to membrane sepn groove 10 from the top of film unit 13.
In membrane sepn groove 10, the draining that stockpiles the draining that flows into via draining supply-pipe L1 and mixed with the effusive thickened sludge from the top of film unit 13 comes the organism in the draining is carried out a biological disposal upon through mikrobe.The draining that in membrane sepn groove 10, stockpiles is sent in the film unit 13 via the injector 18 and the second induction pipe L3 through pump 15.Here, when valve 20 is open mode, injector 18 will make the gas that attracts via air-supply duct 19 as bubble and the blended draining imports film unit 13.
In the membrane sepn biological treatment device 1b of second embodiment; Also same with the membrane sepn biological treatment device 1a of first embodiment; Can each valve 20,22 be opened and closed according to the timing of the clean of the timing of filtration treatment peace film 14; Utilize the current of crossing current, prevent the formation of filter cake on surface of the flat film 14 of film unit 13, the filter cakes that form are gone up on flat film 14 surfaces peeled off and improve and suppress the inhibition effect that mud is piled up to flat film 14.
For example, in membrane sepn biological treatment device 1b, in filter process, through motor 21 valve on the air-supply duct 19 20 cuts out, the draining that will not contain bubble through pump 15 is gone in the film unit 13 with quick conductance.In addition, the valve 22 on the treating water vent pipe L4 is opened, the treating water that filtration obtains that passes through in the film unit 13 is seen off from membrane sepn groove 10 through motor 23.In this case, the draining that imports in the film unit 13 does not become turbulent flow and becomes laminar flow, therefore can suppress the generation of lip-deep concentration polarization layer of film or gel coat, promptly can suppress the accumulation of mud to flat film 14.
In addition, for example in membrane sepn biological treatment device 1b, in the clean process of flat film 14, through motor 21 valve on the air-supply duct 19 20 is opened, through pump 15 draining in the membrane sepn groove 10 is seen off, the draining that will contain bubble imports in the film unit 13.In addition, through motor 23 treating water vent pipe L4 is gone up valve 22 and close, make from film unit 13 interior treating water discharges to stop.In this case, in film unit 13, produce turbulent flow through current that flow over and the current that contain bubble, this turbulent flow makes flat film 14 vibrations, can peel off the filter cake of putting down film 14 surfaces thus effectively.
In this membrane sepn biological treatment device 1b,, have only the pressure-losses that the throttling of injector 18 causes and the pressure-losses in the crossing current water route between a plurality of flat film 14 from the pressure-losses of pump 15.Therefore, the pressure-losses is less, so the power that pump 15 needs tails off, compares with the situation of cleaning through aeration and also can reduce power consumption.
As stated, in membrane sepn biological treatment device 1b, can suppress the accumulation of mud, and can peel off the mud of piling up on the flat film 14 through turbulent flow through the laminar flow that in film unit 13, produces to flat film 14.
In addition; In the above-mentioned example that uses Fig. 2 to explain; Explained that injector 18 attracts via the gases that produce in air-supply duct 19 pairs of membrane sepn grooves 10 and makes it be mixed into the situation in the draining, but the gas that injector 18 attracts need not be defined in the gas in the membrane sepn groove 10.
Each embodiment of the present invention is illustrated, but these embodiments just point out as an example, be not intended to limit scope of invention.These new embodiments can be implemented with other variety of ways, in the scope of the aim that does not break away from invention, can carry out various omissions, displacement and change.These embodiments or its distortion are included in scope of invention or the aim, and are included in the invention of putting down in writing in claims and equivalency range thereof.

Claims (3)

1. membrane sepn biological treatment device possesses:
Storage tank, the film that is built-in with mikrobe that the organism in the draining is carried out a biological disposal upon and draining is separated into treating water and mud;
Pump produces the current that flow over to above-mentioned face; And
Injector is arranged on the ejection side of said pump, and gas is attracted to be mixed in the current that produced by said pump.
2. the membrane sepn biological treatment device of putting down in writing like claim 1 is characterized in that,
Above-mentioned injector makes the attraction mixing of gas stop when membrane filtration, when film cleans, makes the attraction of gas mix action.
3. the membrane sepn biological treatment device of being put down in writing like claim 1 or 2 is characterized in that,
Above-mentioned injector attracts to mix to the gas that in above-mentioned storage tank, produces.
CN2011103633854A 2010-11-16 2011-11-16 Film Separation Bio-treatment Device Pending CN102557233A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP255713/2010 2010-11-16
JP2010255713A JP5439344B2 (en) 2010-11-16 2010-11-16 Membrane separation biological treatment equipment

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CN102557233A true CN102557233A (en) 2012-07-11

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Cited By (1)

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JP2014034003A (en) * 2012-08-09 2014-02-24 Meidensha Corp Membrane separation methane fermentation apparatus and membrane separation methane fermentation method
CA2964891C (en) 2014-10-22 2021-11-09 Koch Membrane Systems, Inc. Membrane filter module with bundle-releasing gasification device
USD779632S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Bundle body
JP6327306B2 (en) * 2016-09-13 2018-05-23 株式会社明電舎 Membrane separation methane fermentation treatment apparatus and membrane separation methane fermentation treatment method

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JP5439344B2 (en) 2014-03-12

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Application publication date: 20120711