CN105174425A - Membrane bioreactor - Google Patents
Membrane bioreactor Download PDFInfo
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- CN105174425A CN105174425A CN201510490290.7A CN201510490290A CN105174425A CN 105174425 A CN105174425 A CN 105174425A CN 201510490290 A CN201510490290 A CN 201510490290A CN 105174425 A CN105174425 A CN 105174425A
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- membrane
- zeolite
- porous support
- fine pore
- reaction tank
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Abstract
The present invention discloses a membrane bioreactor, which comprises a reaction tank and a membrane element in the reaction tank. The membrane element includes an inner cavity and permeable cylindrical support layer; the outer surface of the support layer is coated with a composite filter membrane layer; the upper end of the inner cavity is closed, and the lower end of the inner cavity is provided with a water outlet; the reaction tank is also provided with a water collecting tray connected to the water outlet of the membrane element; the side surface of the water collecting tray is connected to a suction pump through a water collecting pipe; and the composite filter membrane includes a porous support and a zeolite film on the surface of the porous support and a polymer film formed on the surface of the zeolite. The membrane bioreactor substantially retains the original advantages of a submerged fiber membrane bioreactor; and the membrane element itself has high strength, can effectively reduce the probability of membrane wire breakage, thus prolonging the service life of the membrane element.
Description
Technical field
The present invention relates to a kind of membrane bioreactor.
Background technology
Existing membrane bioreactor MBR technique mainly utilizes aperture to be about the micro-filtration membrane element of 1mm at 0.1 microns, film silk internal diameter, adopts built-in immersion technique, carrys out the reacted active sludge mud mixture of separating bio, reach the object of purification of water quality.Submerged hollow fiber membrane bio-reactor, due to cost advantage, occupies most practical application engineering case, is the main application form of membrane biological reactor process.But in practical engineering application, hollow-fibre membrane also exists several obvious technological deficiency: 1, fiber yarn easily ruptures in vigorous stirring process; 2, cleaning difficulty, generally needs to take out biological reaction tank and cleans specially; 3, because high-bulk-density, making very easily by sludge blockage in reaction tank between fiber yarn, wherein the blocking of membrane element two terminal membrane silk and seal gum joint portion, is modal sludge blockage.After blocking, membrane flux sharply declines, and goes out water unstable, easily causes broken fiber filaments, and improves cleaning difficulty.Film blocking is one of major obstacle of MBR process engineering application.
In recent years, separation means such as super method of purification, reverse osmosis method, gas separating method etc. by selective permeation separatory membrane had obtained application in numerous fields, and were put goods on the market by the separatory membrane of all-purpose matrix thing.As the matrix thing of selective permeation separatory membrane, the polymer adopted comprises cellulose-type, cellulose acetate type, polyamide, polypropylene nitrilic type, polyvinyl alcohol type, polymethylmethacrylate type, polysulfones type, polyolefin-type etc.Wherein polysulfones type polymkeric substance has excellent physical and chemical performance as thermotolerance, acid resistance, alkali resistance, scale resistance etc., therefore Recent study emphasis turned to exploitation its as on the matrix thing of medicine and industrial separation film.
But because polysulfones type polymkeric substance is lyophobic dust, therefore selective permeation separatory membrane prepared therefrom can not show a candle to the selective permeation separatory membrane prepared with hydrophilic polymer at water-wet aspect of performance.
Zeolite is the crystallinity aluminosilicate of the pore with molecular dimension size, the film be made up of zeolite, has the character optionally making molecule pass through according to the difference of molecular dimension and shape, therefore can be used as molecular sieve and be widely used.Purposes wherein as the separatory membrane of water and organic solvent etc. gets most of the attention.But, when the zeolite membrane as separatory membrane performance function exists with monomer, enough physical strengths, therefore, use under being normally supported on the state on the porous matrix be made up of pottery etc.As the exemplary process of carrying out zeolite membrane film forming on porous matrix, under the state being impregnate porous matrix in the raw material being main raw material with silica source and alumina source, zeolite membrane is made to be attached to the synthetic method on porous matrix surface by hydro-thermal reaction.If in the slurry raw material making porous matrix be immersed in containing silica source and alumina source, and be adjusted to suitable temperature, so, the trickle zeolite kind crystalline substance in slurries becomes nucleus, and zeolite is grown up and formed film.Under the state of porous matrix loaded zeolite kind crystalline substance, manufacture the method for zeolite membrane itself by hydro-thermal reaction is known (for example, referring to Unexamined Patent 7-185275 publication).In this hydro-thermal reaction method, when porous matrix is immersed in oversaturated slurries, trickle zeolite kind crystalline substance is attached to porous matrix surface and grows into zeolite membrane, moreover, the crystallization of zeolites having become large of growing up in slurries also can be attached to porous matrix surface, thus zeolite membrane is grown up.The zeolite membrane of such formation does not have homogeneous aperture and thickness, is easy to the problem producing pin hole (ピ Application ホ mono-Le) and so on.For this reason, propose by hydro-thermal reaction on porous matrix during synthetic zeolite film, make pottery wait porous matrix load kind brilliant, the scheme that the concentration of slurries mesolite raw material sets very low in advance.
Summary of the invention
The object of the invention is to propose a kind of membrane bioreactor.
For reaching this object, the present invention by the following technical solutions:
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 6-18 μm.
This membrane bioreactor remains the original advantage of immersion fiber membrane biological reaction device substantially, the high strength that membrane element itself has, and effectively can reduce film silk fracture probability, thus extend the work-ing life of membrane element.
Embodiment
Embodiment 1
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 6 μm.
Embodiment 2
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 8 μm.
Embodiment 3
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 10 μm.
Embodiment 4
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 12 μm.
Embodiment 5
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 14 μm.
Embodiment 6
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 16 μm.
Embodiment 7
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 18 μm.
Embodiment 8
A kind of membrane bioreactor, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, it is characterized in that: composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.The average fine pore of described porous support is 15 μm.
Claims (1)
1. a membrane bioreactor, it is characterized in that, comprise reaction tank and the membrane element being positioned at reaction tank, described membrane element comprise inner chamber and can be permeable cylindrical support layer, the outside surface of supporting layer is coated with composite filter rete, the upper end closed of described inner chamber, the lower end of inner chamber is provided with water outlet, also be provided with water-collecting tray in reaction tank to be connected with the water outlet of described membrane element, water-collecting tray side is connected with suction pump by header, composite filter membrane be comprise porous support and this porous support surface filming zeolite membrane and zeolite surface formed polymeric film, described porous support is ceramic sintering material, zeolite membrane is prepared by hydro-thermal reaction under the state that institute's zeolite membrane is porous support loaded zeolite kind crystalline substance, described polymeric film is poly (ether sulfone) film, and be coated in zeolite membrane upper surface, wherein, the average fine pore of described polymeric film is less than the average fine pore of described zeolite membrane, the average fine pore of described zeolite membrane is less than the average fine pore of described porous support.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510490290.7A CN105174425A (en) | 2015-08-11 | 2015-08-11 | Membrane bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510490290.7A CN105174425A (en) | 2015-08-11 | 2015-08-11 | Membrane bioreactor |
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| CN105174425A true CN105174425A (en) | 2015-12-23 |
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| CN201510490290.7A Pending CN105174425A (en) | 2015-08-11 | 2015-08-11 | Membrane bioreactor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3263291B2 (en) * | 1995-10-03 | 2002-03-04 | 株式会社クボタ | Septic tank |
| CN101874987A (en) * | 2009-04-29 | 2010-11-03 | 上海膜达克环保工程有限公司 | Pipe type membrane element and submerged membrane bioreactor |
| CN104307390A (en) * | 2014-11-05 | 2015-01-28 | 华玉叶 | Composite membrane |
-
2015
- 2015-08-11 CN CN201510490290.7A patent/CN105174425A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3263291B2 (en) * | 1995-10-03 | 2002-03-04 | 株式会社クボタ | Septic tank |
| CN101874987A (en) * | 2009-04-29 | 2010-11-03 | 上海膜达克环保工程有限公司 | Pipe type membrane element and submerged membrane bioreactor |
| CN104307390A (en) * | 2014-11-05 | 2015-01-28 | 华玉叶 | Composite membrane |
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Application publication date: 20151223 |