CN100368316C - High-pass flexible bionic dynamic membrane assembly and its production method and uses - Google Patents
High-pass flexible bionic dynamic membrane assembly and its production method and uses Download PDFInfo
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- CN100368316C CN100368316C CNB2006100383485A CN200610038348A CN100368316C CN 100368316 C CN100368316 C CN 100368316C CN B2006100383485 A CNB2006100383485 A CN B2006100383485A CN 200610038348 A CN200610038348 A CN 200610038348A CN 100368316 C CN100368316 C CN 100368316C
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- 239000000463 material Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 16
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
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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)
Abstract
The present invention relates to a flexible bionic dynamic membrane assembly with high flux and a manufacturing method thereof, particularly to a flexible bionic dynamic membrane assembly with high flux, a manufacturing method thereof and an application in a biochemical sewage treatment device. The flexible bionic dynamic membrane assembly comprises a membrane assembly, a valve, a movable joint, a membrane bracket and a fixing clip, wherein the membrane assembly comprises a curtain sheet, a flow guide cavity and water collecting pipes. The curtain sheet is made from a plurality of kinds of porous material nets or filtration cloths, and combined and assembled by the porous material nets or the filtration cloths. The surface of the membrane assembly is decorated by collagen protein. The curtain sheet has a cavity with length and width, both sides are glued or seamed in the long direction, and both sides have openings in the width direction. A flexible flow guide grid is arranged in the sheet cavity to form a flexible flow guide cavity. Two opening ends of the curtain sheet with the flexible flow guide cavity are respectively inserted in a groove with the two water collecting pipes. One end of each water collecting pipe is blocked and sealed, and the other end is connected with a main water outlet pipe by the matched movable joint and the valve. The fixing clip is welded on the membrane bracket, and the water collecting pipes are respectively fixed on the fixing clip.
Description
Technical field
What a kind of high-pass flexible bionic dynamic membrane assembly of the present invention and preparation method thereof, application related to is a kind of high-pass flexible bionic dynamic membrane assembly that is used for solid-liquid separation and preparation method thereof and the application of high-pass flexible bionic dynamic membrane assembly at the sewage disposal biochemical device, belongs to environment, biology and chemical field.
Background technology
The wastewater treatment biochemical system is divided into suspension growth and fixed growth from the microbial growth pattern, often relates to solid-liquid separation for the biochemical system of suspension growth pattern, and traditional method is to utilize the gravity settling effect of second pond.Membrane bioreactor (MBR) is the focus of present biochemical system research, because of its have good microbe filter effect, effluent quality height, easy to operate, reduce advantage such as floor space gradually through engineering approaches use.Membrane module among the MBR is divided into organic membrane and mineral membrane according to the preparation material, according to membrane structure hollow-fibre membrane, flat sheet membrane, rolled film, tubular membrane etc. is arranged.Long-term number of research projects has been carried out in the preparation of film both at home and abroad, emerged in large numbers the membrane module of each style in succession, and structure integral type MBR and separated type MBR.Integral type MBR forms negative pressure and reaches solid-liquid separation effect by self-priming both sides inside and outside film, and it is very low to go out the aqueous suspension solid content.Yet the preparation of film is on the high side, film in use is easy to be subjected to the pollution of microorganism and metabolic secretion thing, needs regular matting, has increased running cost, and reduce the work-ing life of short film, these factors have limited the large-scale promotion application of MBR greatly.
Dynamic Membrane (Dynamic Membrane) is an important selection that is used to research and solve MBR the problems referred to above, part scholar studies the solid-liquid separation that it is used for field of waste water treatment, Kiso (Wat Res, 2000,34 (17): 4143-4150) etc. the screen making membrane module of employing certain pore size is used for active sludge, relies on waterhead to form the biodynamic film in screen surface and improves effluent quality.Zhang Hanmin (ACTA Scientiae Circumstantiae, 2005,25 (2): 249-253) wait the industrial filter cloth that adopts aperture 56 μ m to make membrane module,, form precoated dynamic membrane-bio-reactor with the PAC precoating.Huang Xia (patent of invention publication number CN1363526A) etc. adopt base material formation filter assemblies such as common porous material, carry out solid-liquid separation by the water level pressure reduction of filter assemblies in reactor.Though the research of Dynamic Membrane has obtained certain progress, the dynamic film component of making is in stationary state in biochemical reactor, only depend on aeration that face cross-flow shearing force unilaterally is provided, and membrane pollution problem is also unresolved.
Summary of the invention
The object of the invention is based on the limiting factor of above-mentioned MBR large-scale promotion application and designs and a kind of high-pass flexible bionic dynamic membrane assembly and preparation method thereof is provided, uses.The curtain sheet is a base material with porous web material or filter cloth in the membrane module, be assembled by the combination of some kinds of porous web materials or filter cloth, and with collagen protein modified membrane assembly surface.Membrane module arranged with curtain formula structure be immersed in the biochemical reactor, form negative pressure in the film by water pump, form one deck even compact biomass membrane on the film surface, this layer biomass membrane is from the similar imitative microorganism cells film of macrostructure, have very strong filteration, can realize the biochemical reactor solid-liquid separation.Aeration provides face cross-flow shearing force, simultaneously flexible fluid-directing grid and soft header are arranged in the membrane module structure of the present invention and have flexible structure, can produce flexible shake, the thickness of effective controlling diaphragm surface biological film, make microbial film be in homeostasis process all the time, the reactor of above-mentioned formation is called the flexible bionic bioreactor of dynamic membrane.Flexible shake can bubble crushing, improves the aeration utilization ratio, cuts down the consumption of energy.
A kind of high-pass flexible bionic dynamic membrane assembly and preparation method thereof, application are to take following scheme to realize:
A kind of high-pass flexible bionic dynamic membrane assembly structure comprises membrane module, valve, loose joint, film frame, fixing catch; Membrane module structure comprises curtain sheet, diversion cavity, the header that some kinds of porous materials constitute, the curtain sheet is a base material with porous web material or filter cloth, combination by some kinds of porous web materials or filter cloth is assembled, and with collagen protein modified membrane assembly surface, the curtain sheet has the chamber of certain length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, the curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes the flexible fluid-directing chamber; Have groove on the header, look curtain sheet width and thickness and determine the length and the width of groove, groove is made an opening through tube wall fully, two opening ends that are provided with the curtain sheet in flexible fluid-directing chamber are inserted respectively in the groove of two headers, by seal gum header trough rim and curtain sheet contact position are sealed, one end of header blocks, and the other end is connected to total rising pipe by supporting loose joint and valve; Be welded with fixing catch on the film frame, header is individually fixed on the fixing catch.
Collagen protein derives from tankage etc.Header adopts hard tube or flexible pipe in the membrane module.The curtain sheet adopts one or more combinations in screen cloth, filter cloth, the nylon wire.
Be welded with fixing catch on the film frame, the header of membrane module is individually fixed on the fixing catch, and membrane module is the vertical blinds formula, has improved the membrane module loadings of unit biochemical reactor volume.Every intermembranous every 50-100mm, and the 100-200mm place lays the aeration structure under the membrane module, and face cross-flow shearing force is provided, and makes membrane module produce flexible shake simultaneously, effectively the thickness of controlling diaphragm surface biological film makes microbial film be in homeostasis process all the time.Flexible shake can bubble crushing, improves the aeration utilization ratio, cuts down the consumption of energy.
The total rising pipe of membrane module is connected with water pump, forms negative pressure by water pump, impels the formation of biomass membrane, the similar imitative microorganism cells film of macrostructure.Add 0.1～1.0% Powdered Activated Carbon in the biochemical reactor, both as the microorganism colonization carrier, also as the material of protective membrane.
A kind of making method of high-pass flexible bionic dynamic membrane assembly is characterized in that
(1) making of membrane module: membrane module structure comprises the curtain sheet, diversion cavity, header, it is base material that the curtain sheet is selected the porous web material of different size or filter cloth for use, be processed into the chamber of certain length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, in collagen liquid, soak then, add 0.5～3.0% chromium-aldehyde properties-correcting agent, temperature of reaction is 30～40 ℃, reaction times is 2～6 hours, taking-up is dried, the curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes the flexible fluid-directing chamber, and fluting is one on header, look curtain sheet width and thickness and determine the length and the width of groove, groove is made an opening through tube wall fully, and two opening ends that will be provided with the curtain sheet in flexible fluid-directing chamber then insert respectively in the groove of two headers, and depth of penetration is the radius of header, with header trough rim and the sealing of curtain sheet contact position, be made into membrane module by seal gum;
(2) on the film frame, set up fixing catch, two-layer up and down, with the spacing 50-100mm of layer fixing catch, the fixing catch spacing is slightly less than membrane module length 10-20mm up and down, and above-mentioned membrane module is fixed on the fixing catch according to vertical direction, guarantee that membrane module can have certain sinuousness, and two adjacent membrane modules do not contact with each other, and an end of the header of membrane module blocks, and the other end is by valve and loose joint, be connected to total rising pipe, make high-pass flexible bionic dynamic membrane assembly.
The application of a kind of high-pass flexible bionic dynamic membrane assembly in the sewage disposal biochemical device: some groups of high-pass flexible bionic dynamic membrane assemblies are fixed on the film frame, put into biochemical reactor, total rising pipe is connected with water pump, add 0.1～1.0% Powdered Activated Carbon in the biochemical reactor, as the material of microorganism colonization carrier and protective membrane; Have the aeration structure at the film frame, apart from membrane module lower end 100-200mm, form negative pressure by water pump, impel the formation of biomass membrane at curtain chip surface, the aeration structure provides face cross-flow shearing force simultaneously, and makes membrane module produce flexible shake, destroy the biomass membrane of curtain chip surface, finally make the formation of biomass membrane reach equilibrium state with coming off, be in running balance all the time, constituted the flexible bionic bioreactor of dynamic membrane.
The present invention is a base material with the common porous material in market (screen cloth, filter cloth, nylon wire etc.), and wide material sources are cheap, and the combination of some kinds of porous materials of process is assembled, and modifies the membrane module surface certainly with the collagen egg.Membrane module arranged with curtain formula structure be immersed in the biochemical reactor, form negative pressure in the film by water pump, form one deck even compact biomass membrane, the similar imitative microorganism cells film of macrostructure on the collagen film surface, have very strong filteration, can realize the biochemical reactor solid-liquid separation; Aeration provides face cross-flow shearing force, simultaneously flexible fluid-directing grid and soft header is arranged in the membrane module structure of the present invention and has flexible structure, can produce flexible shake, the effective thickness of controlling diaphragm surface biological film, said process flexible bionic Dynamic Membrane.Flexible shake can bubble crushing, improves the aeration utilization ratio, cuts down the consumption of energy.Membrane module processing of the present invention is simple, cheap, need not film and cleans, and has reduced fixed investment and running cost, has wide market application prospect.
The active sludge solid liquid that a kind of high-pass flexible bionic dynamic membrane assembly of the present invention is highly suitable in the sewage biochemical treatment separates.Traditional solid-liquid separation is utilized the effect of drowning oneself of the gravity of second pond, and the design of second pond has increased floor space and fixed investment, and mud need reflux, and has also increased process cost.The content of suspension solid substance is often higher in the water outlet of second pond simultaneously, is unfavorable for the direct discharging of water outlet.Membrane bioreactor (MBR) has the good solid-liquid separating effect, the effluent quality height, but be shortcomings such as all there are the cost height in mineral membrane or organic membrane, easily pollute, clean frequent, membrane lifetime weak point, fixed investment height.High-pass flexible bionic dynamic membrane assembly of the present invention has tangible advantage than present membrane bioreactor, and (1) material source is abundant, and is cheap; (2) membrane module preparation processing is simple and convenient; (3) membrane flux height is 3～10 times of common hollow-fibre membrane; (4) film is stable, is difficult for stopping up, and need not film and cleans; (5) membrane module surface biological plasma membrane is in dynamic balance state, constitutes the flexible bionic bioreactor of dynamic membrane.The membrane module cost of manufacture is low, and is easy to operate, and flux is big, is difficult for film and pollutes, and duration of service is long.
Description of drawings
The invention will be further described below with reference to accompanying drawing.
Fig. 1 is a kind of membrane module structure front view of high-pass flexible bionic dynamic membrane assembly.
Fig. 2 is a kind of membrane module structure left view of high-pass flexible bionic dynamic membrane assembly.
Fig. 3 is a kind of membrane module assembling front view of high-pass flexible bionic dynamic membrane assembly.
Fig. 4 is a kind of membrane module assembling vertical view of high-pass flexible bionic dynamic membrane assembly.
Fig. 5 is the application state synoptic diagram of a kind of high-pass flexible bionic dynamic membrane assembly in the sewage disposal biochemical device.
Embodiment
With reference to accompanying drawing 1～4, the high-pass flexible bionic dynamic membrane assembly structure comprises membrane module 8, valve 4, loose joint 5, film frame 6, fixing catch 7; Membrane module 8 structures comprise curtain sheet 1, diversion cavity 2, the header 3 that some kinds of porous materials constitute, curtain sheet 1 is a base material with porous web material or filter cloth, combination by some kinds of porous web materials or filter cloth is assembled, and with collagen protein modified membrane assembly surface, curtain sheet 1 has the chamber of certain length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, the curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes flexible fluid-directing chamber 2; Fluting is one on the header 3, look curtain sheet width and thickness and determine the length and the width of groove, groove is made an opening through tube wall fully, two opening ends that are provided with the curtain sheet 1 in flexible fluid-directing chamber 2 are inserted respectively in the groove of two headers 3, by seal gum header 3 trough rims and curtain sheet 1 contact position are sealed, one end of header 3 blocks, and the other end is connected to total rising pipe by supporting loose joint 5 and valve 4; Be welded with fixing catch 7 on the film frame 6, header 3 is individually fixed on the fixing catch 7.
Curtain sheet 1 is a base material with the common porous material in market (screen cloth, filter cloth, nylon wire etc.), and the combination of some kinds of porous materials is assembled.One or more combinations that curtain sheet 1 adopts in screen cloth, filter cloth, the nylon wire.
Shown in accompanying drawing 1,2, membrane module structure comprises curtain sheet 1, diversion cavity 2, header 3.It is base material that curtain sheet 1 is selected the porous web material of different size or filter cloth for use, be processed into the chamber of certain length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, soak in collagen liquid then, add 0.5～3.0% chromium-aldehyde properties-correcting agent, temperature of reaction is 30～40 ℃, in 2～6 hours reaction times, taking-up is dried.The curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes flexible fluid-directing chamber 2.Two opening ends are inserted respectively in the groove of two headers 3 (can be hard tube, also can be flexible pipe) then, depth of penetration is the radius of header 3, by seal gum header 3 trough rims and curtain sheet 1 contact position is sealed.
Shown in accompanying drawing 3,4, set up fixing catch 7 on the film frame 6, two-layer up and down, with the spacing 50-100mm of layer fixing catch 7, fixing catch 7 spacings are slightly less than membrane module 8 length 10-20mm up and down.Membrane module 8 is fixed on the fixing catch 7 according to vertical direction, guarantee that membrane module 8 can have certain sinuousness, and two adjacent membrane modules 8 does not contact with each other.One end of the header 3 of membrane module 8 blocks, and the other end is connected to total rising pipe 9 by valve 4 and loose joint 5.
As shown in Figure 5, after membrane module 8 is fixedly finished, put into biochemical reactor 12, total rising pipe 9 is connected with water pump 10, adds 0.1～1.0% Powdered Activated Carbon in the biochemical reactor 12,, as the material of microorganism colonization carrier and protective membrane.Have aeration structure 11 at film frame 6, apart from membrane module 8 lower end 100-200mm.Form negative pressure by water pump 10, impel the formation of biomass membrane on curtain sheet 1 surface, aeration structure 11 provides face cross-flow shearing force simultaneously, and make membrane module 8 produce flexible shake, destroy the biomass membrane on curtain sheet 1 surface, finally make the formation of biomass membrane reach equilibrium state with coming off, be in running balance all the time, constituted the flexible bionic bioreactor of dynamic membrane.Flexible shake can bubble crushing, improves the aeration utilization ratio, cuts down the consumption of energy.
Embodiment 1: selects for use 200 orders and 300 purpose nylon mesh as base material, makes 1000 * 500mm compliant membrane assembly, in collagen liquid, soak, add 0.5% chromium-aldehyde properties-correcting agent, and 30 ℃ of temperature of reaction, in 2 hours reaction times, header is the 20mmPVC pipe.Membrane module of the present invention is used for the processing of sanitary sewage, the biochemical reactor operating parameter is as follows: water inlet COD150～380mg/L, hydraulic detention time (HRT) 6h, activated sludge concentration 6.0～8.0g/L, Powdered Activated Carbon dosage 0.1%, gas-water ratio 20～30: 1, dissolved oxygen concentration (DO) 2.0～4.0mg/L, 22～30 ℃ of temperature of reaction, 5 tons of day outputs.Controlling diaphragm flux 30L/m
2H, continuous effluent, film pressure keep being stabilized in-0.02MPa.Effluent quality by membrane module is as follows: COD＜20mg/L, SS are zero, colorless and odorless.Membrane module of the present invention steady running 180 days need not film and cleans.
Embodiment 2: selects for use 100 eye mesh screens and 200 order nylon wires as base material, makes 800 * 400mm compliant membrane assembly, in collagen liquid, soak, add 1.5% chromium-aldehyde properties-correcting agent, and 40 ℃ of temperature of reaction, in 4 hours reaction times, header is the 20mmPVC pipe.Membrane module of the present invention is used for the processing of dyeing waste water, the biochemical reactor operating parameter is as follows: intaking is acidication waste water, COD900～1500mg/L, about 50 times of colourity, hydraulic detention time (HRT) 15h, activated sludge concentration 6.5～8.0g/L, Powdered Activated Carbon dosage 0.6%, 2.5 tons of day outputs.Controlling diaphragm flux 20L/m
2H, film pressure keeps being stabilized in-0.02MPa.Effluent quality by membrane module is as follows: COD＜100mg/L, SS are zero, 3 times of colourities.Membrane module of the present invention steady running 160 days need not film and cleans, and membrane flux and film pressure all there are not variation, the about 1mm of biomass membrane thickness.
Embodiment 3: selects for use 80 order nylon wires and filter cloth as base material, makes 1100 * 600mm compliant membrane assembly, in collagen liquid, soak, add 3.0% chromium-aldehyde properties-correcting agent, and 35 ℃ of temperature of reaction, in 6 hours reaction times, header is the 20mm rubber hose.Membrane module of the present invention is used for the processing of terephthalic acid (PTA) waste water, the biochemical reactor operating parameter is as follows: terephthalic acid (PTA) factory effluent, mainly contain terephthalic acid, acetate, methyl acetate etc., water inlet COD4000 ± 1000mg/L, TA1400 ± 100mg/L, hydraulic detention time (HRT) 30h, TA degradation bacteria strains concentration 2.0～4.0g/L, Powdered Activated Carbon dosage 1.0%, 1.6 tons of day outputs.Controlling diaphragm flux 18L/m
2H, continuous effluent, film pressure keep being stabilized in-0.02～-0.03MPa.Effluent quality by membrane module is as follows: COD＜100mg/L, SS are zero.Membrane module of the present invention steady running 205 days need not film and cleans the about 0.7mm of biomass membrane thickness.
Claims (6)
1. a high-pass flexible bionic dynamic membrane assembly is characterized in that structure comprises membrane module, valve, loose joint, film frame, fixing catch; Membrane module structure comprises curtain sheet, diversion cavity, the header that some kinds of porous materials constitute, the curtain sheet is base material with the porous web material, combination by some kinds of porous web materials is assembled, and with collagen protein modified membrane assembly surface, the curtain sheet has the chamber of length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, the curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes the flexible fluid-directing chamber; Have groove on the header, two opening ends that are provided with the curtain sheet in flexible fluid-directing chamber are inserted respectively in the groove of two headers, with header trough rim and the sealing of curtain sheet contact position, an end of header blocks by seal gum, and the other end is connected to total rising pipe by supporting loose joint and valve; Be welded with fixing catch on the film frame, header is individually fixed on the fixing catch.
2. a kind of high-pass flexible bionic dynamic membrane assembly according to claim 1 is characterized in that the total rising pipe of membrane module is connected with water pump.
3. a kind of high-pass flexible bionic dynamic membrane assembly according to claim 1 is characterized in that membrane module is the vertical blinds formula.
4. a kind of high-pass flexible bionic dynamic membrane assembly according to claim 1 is characterized in that header adopts hard tube or flexible pipe in the membrane module.
5. the making method of a high-pass flexible bionic dynamic membrane assembly is characterized in that
(1) making of membrane module: membrane module structure comprises the curtain sheet, diversion cavity, header, it is base material that the curtain sheet is selected the porous web material of different size for use, be processed into the chamber of certain length and width size, the wherein bonding or stitching in length direction both sides, width both sides opening, in collagen liquid, soak then, add 0.5～3.0% chromium-aldehyde properties-correcting agent, temperature of reaction is 30～40 ℃, and the reaction times is 2～6 hours, taking-up is dried, the curtain sheet is provided with the flexible fluid-directing grid in the chamber, constitutes the flexible fluid-directing chamber, and fluting is one on header, look curtain sheet width and thickness and determine the length and the width of groove, groove is made an opening through tube wall fully, and two opening ends that will be provided with the curtain sheet in flexible fluid-directing chamber then insert respectively in the groove of two headers, and depth of penetration is the radius of header, with header trough rim and the sealing of curtain sheet contact position, be made into membrane module by seal gum;
(2) on the film frame, set up fixing catch, two-layer up and down, with the spacing 50-100mm of layer fixing catch, the fixing catch spacing is fixed in above-mentioned membrane module on the fixing catch according to vertical direction less than membrane module length 10-20mm up and down, guarantee that membrane module can have sinuousness, and two adjacent membrane modules do not contact with each other, and an end of the header of membrane module blocks, and the other end is by valve and loose joint, be connected to total rising pipe, make high-pass flexible bionic dynamic membrane assembly.
6. the application of the described a kind of high-pass flexible bionic dynamic membrane assembly of claim 1 in the sewage disposal biochemical device: some groups of high-pass flexible bionic dynamic membrane assemblies are fixed on the film frame, put into biochemical reactor, total rising pipe is connected with water pump, add 0.1～1.0% Powdered Activated Carbon in the biochemical reactor, as the material of microorganism colonization carrier and protective membrane; Have the aeration structure at the film frame, apart from membrane module lower end 100-200mm, form negative pressure by water pump, impel the formation of biomass membrane at curtain chip surface, the aeration structure provides face cross-flow shearing force simultaneously, and makes membrane module produce flexible shake, destroy the biomass membrane of curtain chip surface, finally make the formation of biomass membrane reach equilibrium state with coming off, be in running balance all the time, constituted the flexible bionic bioreactor of dynamic membrane.
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