CN109789376A - Hollow-fibre membrane, filter assemblies and wastewater treatment equipment - Google Patents
Hollow-fibre membrane, filter assemblies and wastewater treatment equipment Download PDFInfo
- Publication number
- CN109789376A CN109789376A CN201780060655.XA CN201780060655A CN109789376A CN 109789376 A CN109789376 A CN 109789376A CN 201780060655 A CN201780060655 A CN 201780060655A CN 109789376 A CN109789376 A CN 109789376A
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- hollow
- fibre membrane
- mentioned
- resin involucra
- framework material
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- 239000012528 membrane Substances 0.000 title claims abstract description 132
- 239000000835 fiber Substances 0.000 title claims abstract description 126
- 230000000712 assembly Effects 0.000 title claims description 33
- 238000000429 assembly Methods 0.000 title claims description 33
- 238000004065 wastewater treatment Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000011347 resin Substances 0.000 claims abstract description 73
- 229920005989 resin Polymers 0.000 claims abstract description 73
- 230000002093 peripheral effect Effects 0.000 claims abstract description 31
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 20
- 239000000295 fuel oil Substances 0.000 claims abstract description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 10
- 230000010148 water-pollination Effects 0.000 claims abstract description 9
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 21
- 239000011148 porous material Substances 0.000 claims description 18
- 239000010802 sludge Substances 0.000 claims description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005977 Ethylene Substances 0.000 claims description 11
- 238000007334 copolymerization reaction Methods 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 description 21
- 230000035515 penetration Effects 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000012535 impurity Substances 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- 230000002209 hydrophobic effect Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 235000012489 doughnuts Nutrition 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229920002521 macromolecule Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011850 water-based material Substances 0.000 description 2
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001542 size-exclusion chromatography Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/031—Two or more types of hollow fibres within one bundle or within one potting or tube-sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/1213—Laminated layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/26—Polyalkenes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/36—Polytetrafluoroethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
- D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
- D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
One embodiment of the present invention relates to hollow-fibre membrane include the framework material of tubular, using polytetrafluoroethylene (PTFE) as main component, there is porosity；And resin involucra, with hydrophily, and it is coated the outer surface and internal voids surface of above-mentioned framework material, the pure water contact angle of outer peripheral surface is 40 ° or more and 80 ° hereinafter, the C heavy oil contact angle of outer peripheral surface in water is 110 ° or more and 150 ° or less.
Description
Technical field
The present invention relates to hollow-fibre membrane, filter assemblies and wastewater treatment equipments.The application is based on November 17th, 2016
Japanese publication the 2016-224141st of it is proposed claims priority, and quotes documented all records in above-mentioned Japanese publication
Content.
Background technique
Such as based on a variety of purposes such as wastewater treatment, as the filter membrane that solid content is filtered and removed to treated water
One kind, use sometimes and porous body be formed as into hollow-fibre membrane obtained by the lesser tubular of diameter.As above-mentioned doughnut
The material of film, it is known to which material as main component is made with the more excellent polytetrafluoroethylene (PTFE) of mechanical strength and chemical stability.
Polytetrafluoroethylene (PTFE) is since with biggish hydrophobicity, water penetration is easily reduced, especially in hollow-fibre membrane
Pore diameter it is small in the case where, filter capacity is easy to become inadequate.In addition, there is biggish hydrophobicity in hollow-fibre membrane
In the case where, there is also following bad situations: the hydrophobic soils such as oil being easy to happen in treated water are attached to hollow
Fiber film surface and generate blocking be referred to as incrustation the phenomenon that.
It is therefore proposed that have the aqueous solution by impregnating hydrophilic material in the perforated membrane formed by polytetrafluoroethylene (PTFE), and
It is crosslinked hydrophilic material, keeps its insoluble and is fixed on the internal voids surface of perforated membrane, to be carried out to perforated membrane hydrophilic
Change processing (referring to No. 2010/092938 bulletin of International Publication No.).Make perforated membrane hydrophiling in this way, so that water penetration mentions
Height, filter capacity increases, and the attachment of hydrophobic soil is inhibited, therefore becomes to be not likely to produce incrustation.
Existing technical literature
Patent document
Patent document 1: No. 2010/092938 bulletin of International Publication No.
Summary of the invention
[problems to be solved by the invention]
However, documented hydrophilicity-imparting treatment needs to carry out following steps in above-mentioned bulletin: perforated membrane is impregnated in and parent
The aqueous solution of water-based material have step in the isopropanol of compatibility, the perforated membrane in hole containing isopropanol is impregnated in it is thin
The step of in the aqueous solution of water-based material to import hydrophilic material in the hole of perforated membrane and by intrapore hydrophily
Crosslink material and the step of be fixed on internal voids surface.Complicated hydrophilicity-imparting treatment causes the price of filter membrane to improve in this way.
[the method used for solving the problem]
One embodiment of the present invention relates to hollow-fibre membrane include the framework material of tubular, with polytetrafluoroethyl-ne
Alkene has porosity as main component；And resin involucra, with hydrophily, and it is coated the outer of above-mentioned framework material
Surface and internal voids surface, the pure water contact angle of the outer peripheral surface of the hollow-fibre membrane are 40 ° or more and 80 ° hereinafter, outer peripheral surface
C heavy oil contact angle in water is 110 ° or more and 150 ° or less.
Detailed description of the invention
[Fig. 1] Fig. 1 is the schematic diagram for indicating the structure of wastewater treatment equipment of one embodiment of the present invention.
[Fig. 2] Fig. 2 is the schematic cross sectional view of the filter assemblies of the wastewater treatment equipment of Fig. 1.
[Fig. 3] Fig. 3 is the schematic section sectional view of the hollow-fibre membrane of the filter assemblies of Fig. 2.
Specific embodiment
[the invention solves project]
The present invention is to complete based on the above situation, and project is to provide more cheap, processing capacity greatly and be not easy
Generate hollow-fibre membrane, filter assemblies and the wastewater treatment equipment of incrustation.
[The effect of invention]
One embodiment of the present invention relates to hollow-fibre membrane is less expensive, processing capacity is big and is not likely to produce product
Dirt.
[explanations of embodiments of the present invention]
One embodiment of the present invention relates to hollow-fibre membrane have: the framework material of tubular, with polytetrafluoroethyl-ne
Alkene has porosity as main component；And resin involucra, with hydrophily, and it is coated the outer of above-mentioned framework material
Surface and internal voids surface, the pure water contact angle of outer peripheral surface are 40 ° or more and 80 ° hereinafter, the C heavy oil of outer peripheral surface in water connects
Feeler is 110 ° or more and 150 ° or less.
In the hollow-fibre membrane, by as main component and being had more using resin involucra coated with polytetrafluoroethylene (PTFE)
The outer surface and internal voids surface of the tubular framework material of permeability are to carry out hydrophiling, therefore water penetration improves, and handle energy
Power is larger, and ratio less easily generates incrustation.In addition, in the hollow-fibre membrane, by by the pure water contact angle and water of outer peripheral surface
In C heavy oil contact angle be set as in above range, so that using has appropriate formation of the hydrophilic material as resin involucra
Material.Only the aqueous solution of resin involucra forming material is impregnated in framework material and is made it dry as a result, it will be able to easily
Form the outer surface of coating framework material and the resin involucra on internal voids surface.Therefore, the hollow-fibre membrane is less expensive, and
And processing capacity is big, and is not likely to produce incrustation.
The main component of above-mentioned resin involucra can be ethylene-vinyl alcohol copolymer, as above-mentioned ethylene vinyl alcohol copolymer
The copolymerization ratio of ethylene in object, preferably 20mol% or more and 60mol% or less.In this way, passing through the main of above-mentioned resin involucra
Ingredient is that the copolymerization ratio of ethylene-vinyl alcohol copolymer and the ethylene in above-mentioned ethylene-vinyl alcohol copolymer is in above range,
So as to be easier and be reliably formed resin involucra, which can assign biggish water penetration and can prevent
Only incrustation.
Above-mentioned framework material can have the support layer of tubular and be laminated in the filter layer of the outer peripheral surface of the support layer.As
The average thickness of above-mentioned support layer, preferably 0.3mm or more and 1.0m are hereinafter, average pore size as above-mentioned support layer, preferably
For 1 μm or more and 3 μm hereinafter, porosity as above-mentioned support layer, preferably 40% or more and 90% or less.As above-mentioned mistake
The average thickness of filtering layer, preferably 10 μm or more and 100 μm hereinafter, average pore size as above-mentioned filter layer, preferably 0.01 μ
M or more and 0.45 μm hereinafter, average thickness as above-mentioned resin involucra, preferably 50nm or less.In this way, passing through above-mentioned skeleton
Material has the support layer of tubular and is laminated in the filter layer of the outer peripheral surface of the support layer, so as to relatively easily manufacture this
Hollow-fibre membrane and keep the doughnut film strength larger, and lesser impurity can be removed from treated water.In addition,
By by the average thickness of above-mentioned support layer, average pore size and porosity, the average thickness of above-mentioned filter layer and average pore size with
And the average thickness of above-mentioned resin involucra is set in above range, so as to more easily manufacture, and prevents processing energy
The reduction of power.
As bubble point, preferably 60kPa or more and 200kPa or less.In this way, by making in bubble point above range, thus
Water penetration is larger, and can remove smaller impurity.
The filter assemblies that other embodiments of the invention are related to include the more hollow-fibre membranes, remain one
The state being aligned on a direction；And a pair of of holding member, the both ends of the more hollow-fibre membranes are fixed in they.
Since the filter assemblies have used the hollow-fibre membrane, less expensive, processing capacity is big, is not likely to produce product
Dirt.In addition, the filter assemblies are by having a pair of of holding member that the both ends of more hollow-fibre membranes are fixed, thus
To easily and reliably while more hollow-fibre membranes can be used and being impregnated in treated water, therefore can be easier
And promptly treated water is filtered.
The wastewater treatment equipment that other embodiments of the invention are related to includes processing sink, and storage contains active dirt
The treated water of mud；And it is configured at the filter assemblies in the processing sink.
The wastewater treatment equipment is handled in sink being stored in by the filter assemblies and is located containing activated sludge
Reason water is filtered.The wastewater treatment equipment is less expensive as a result, and processing capacity is big, is not likely to produce incrustation, thus can with compared with
Low cost relatively reliable handles waste water.
Herein, " main component " refers to the maximum ingredient of quality containing ratio, preferably containing 90 mass % or more at
Point." pure water contact angle " refers to through " sessile drop method " is measured specified in JIS-R3257 (1999) value.In addition, " in water
C heavy oil contact angle " refers to such angle: aspect of measure is horizontally configured downward in pure water, when below measuring object
When standing the oil droplet of C heavy oil, the aspect of measure that is measured in the same manner as specified in JIS-R3257 (1999) " contact angle " and oil droplet it
Between angle.In addition, " average pore size " refers to the pore diameter distribution measurement device (Perm- using PMI company, the U.S.
Porometer the value) measured.In addition, " porosity " refers to the value according to ASTM D792.In addition, " bubble point " refers to using different
Propyl alcohol and the value measured according to ASTM-F316-86.
[detailed contents of embodiments of the present invention]
Hereinafter, the embodiments of the present invention are described in detail referring to attached drawing.
[wastewater treatment equipment]
The wastewater treatment equipment of an embodiment of the invention shown in FIG. 1 includes processing sink T, and storage contains
The treated water of activated sludge；And it is configured at one or more filter assemblies 1 in processing sink T.In addition, at the waste water
Reason device also has filter pump 2, which the treated water in processing sink T is sucked out by filter assemblies 1.
In addition, though it is not shown, but the wastewater treatment equipment can have: for supplying air (oxygen to activated sludge
Gas) aerator, the activated sludge carrier, bubble of the supply for being cleaned to filter assemblies 1 that adhere in high concentration
Sparger, the sludge withdrawing device that excessive activated sludge is discharged are used to carry out other structures element in processing sink T
Frame, control device of support etc..
The wastewater treatment equipment used as aerobic microorganism activated sludge to (for example) sanitary wastewater, sewage, work
Organic matter in the treated waters such as factory's waste water is decomposed, and is separated impurity using filter assemblies 1, discharge.That is, at the waste water
Managing device is the device handled by membrane separation activated sludge process waste water.
(processing sink)
Sink T is handled so that treated water can be stored in a manner of immersion filtration component 1.As the material of processing sink T, example
Resin, metal, concrete such as can be used.
(filter assemblies)
Filter assemblies 1 itself are an embodiment of the invention.
As shown in Fig. 2, filter assemblies 1 include more hollow-fibre membranes 3, (up and down direction) in one direction is remained
The state of upper alignment；And a pair of of holding member (the 1st holding member 4 and the 2nd holding member 5), they are respectively in this more
The both ends of empty fiber membrane 3 are fixed.
< hollow-fibre membrane >
Hollow-fibre membrane 3 itself is an embodiment of the invention.
As shown in figure 3, the hollow-fibre membrane 3 includes the framework material 6 of tubular, using polytetrafluoroethylene (PTFE) as mainly at
Point, there is porosity；And resin involucra 7, with hydrophily, and it is coated outer surface and the inside sky of above-mentioned framework material
Hole surface.
The lower limit of the pure water contact angle of outer peripheral surface as the hollow-fibre membrane 3 is 40 °, preferably 45 °, further excellent
It is selected as 50 °.On the other hand, the upper limit as the pure water contact angle of the outer peripheral surface of the hollow-fibre membrane 3, be 80 °, preferably 75 °,
Further preferably 70 °.It, should in the case where the pure water contact angle of the outer peripheral surface of the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit
The permeable amount of hollow-fibre membrane 3 is possible to become inadequate or be possible to not preventing incrustation.Conversely, hollow at this
In the case that the pure water contact angle of the outer peripheral surface of tunica fibrosa 3 is more than the above-mentioned upper limit, it is possible to form resin involucra 7 because being not easy due to increase
The manufacturing cost of the big hollow-fibre membrane 3.
The lower limit of the C heavy oil contact angle of outer peripheral surface in water as the hollow-fibre membrane 3, be 110 °, preferably 115 °,
Further preferably 120 °.On the other hand, the upper limit of the C heavy oil contact angle as the outer peripheral surface of the hollow-fibre membrane 3 in water,
It is 150 °, preferably 145 °, further preferably 140 °.When the outer peripheral surface C heavy oil contact angle in water of the hollow-fibre membrane 3
In the case where being unsatisfactory for above-mentioned lower limit, it is possible to form resin involucra 7 because being not easy due to increase manufacturing cost.Conversely, when this is hollow
In the case that the C heavy oil contact angle of the outer peripheral surface of tunica fibrosa 3 in water is more than the above-mentioned upper limit, the permeable amount of the hollow-fibre membrane 3
It is possible that becoming inadequate or being possible to not preventing incrustation.
The lower limit of bubble point as the hollow-fibre membrane 3, preferably 60kPa, more preferably 80kPa.On the other hand, as
The upper limit of the bubble point of the hollow-fibre membrane 3, preferably 200kPa, more preferably 180kPa.Above-mentioned lower limit is unsatisfactory in bubble point
In the case of, which is possible to separate impurity with being unable to fully.Conversely, in the case where bubble point is more than the above-mentioned upper limit,
The permeable amount of the hollow-fibre membrane 3 is possible to become inadequate.
The lower limit of mean outside diameter as the hollow-fibre membrane 3, preferably 1mm, more preferably 1.5mm, further preferably
For 2mm.On the other hand, the upper limit as the mean outside diameter of the hollow-fibre membrane 3, preferably 6mm, more preferably 5mm, further
Preferably 4mm.In the case where the mean outside diameter of the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit, the machinery of the hollow-fibre membrane 3
Intensity is possible to become inadequate.Conversely, having can in the case where the mean outside diameter of the hollow-fibre membrane 3 is more than the above-mentioned upper limit
The surface area of the energy hollow-fibre membrane 3 becomes smaller relative to the ratio between sectional area and reduces the filter efficiency of the hollow-fibre membrane 3.
The lower limit of mean inside diameter as the hollow-fibre membrane 3, preferably 0.3mm, more preferably 0.5mm, it is further excellent
It is selected as 0.9mm.On the other hand, the upper limit as the mean inside diameter of the hollow-fibre membrane 3, preferably 4mm, more preferably 3mm.?
It is processed in the hollow-fibre membrane 3 being discharged in the case that the mean inside diameter of the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit
Water when the pressure loss be possible to increase.Conversely, the case where the mean inside diameter of the hollow-fibre membrane 3 is more than the above-mentioned upper limit
Under, it is possible to the thickness of the hollow-fibre membrane 3 reduces and makes the mechanical strength of the hollow-fibre membrane 3 and imitating through blocking for impurity
Fruit becomes inadequate.
Lower limit of the mean inside diameter relative to the ratio between mean outside diameter as the hollow-fibre membrane 3, preferably 3/10, more preferably
It is 2/5.On the other hand, the upper limit as the mean inside diameter of the hollow-fibre membrane 3 relative to the ratio between mean outside diameter, preferably 4/5,
More preferably 3/5.The case where the mean inside diameter of the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit relative to the ratio between mean outside diameter
Under, it is possible to the thickness of the hollow-fibre membrane 3, which becomes water penetration that is excessive and making the hollow-fibre membrane 3, to be reduced.Conversely, in this
In the case that the mean inside diameter of empty fiber membrane 3 is more than the above-mentioned upper limit relative to the ratio between mean outside diameter, it is possible to the hollow-fibre membrane 3
Thickness reduce and make the mechanical strength of the hollow-fibre membrane 3 and becoming inadequate through blocking effect for impurity.
In the filter assemblies 1, as the hollow-fibre membrane 3 along the lower limit of the average effective length of central axis, preferably
1m, more preferably 2m.On the other hand, the upper limit as the average effective length of the hollow-fibre membrane 3, preferably 8m, more preferably
For 7m.In the case where the average effective length of the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit, the volume of the filter assemblies 1 is imitated
Rate is possible to become smaller.Conversely, in the case where the average effective length of the hollow-fibre membrane 3 is more than the above-mentioned upper limit, it is possible to because
The own wt of the hollow-fibre membrane 3 and so that the flexibility of the hollow-fibre membrane 3 is become excessive or when filter assemblies 1 are arranged
Deng operability reduce.
(framework material)
Framework material 6 ensures the shape and mechanical property of the hollow-fibre membrane 3, and using resin involucra 7 and to surface
The characteristic on (outer surface and internal voids surface) is modified.
The framework material 6 using intensity, chemical resistance and hole formed the more excellent polytetrafluoroethylene (PTFE) of easiness as
Main component.
In addition, framework material 6 can be set as the mistake of the support layer 8 with tubular and the outer peripheral surface for being laminated in the support layer 8
Structure as filtering layer 9.In this way, by being set as the support layer 8 with the intensity for ensuring framework material 6 and impurity being stopped to penetrate
Filter layer 9 multilayered structure, so as to improve intensity, and can relatively easily manufacture the small skeleton of active porosity diameter
Material 6.
The lower limit of average thickness as support layer 8, preferably 0.3mm, more preferably 0.5mm.On the other hand, as branch
Hold the upper limit of the average thickness of layer 8, preferably 1.0mm, more preferably 0.8mm.It is unsatisfactory in the average thickness of support layer 8 above-mentioned
In the case where lower limit, the intensity of framework material 6 or even the hollow-fibre membrane 3 is possible to become inadequate.Conversely, in support layer 8
Average thickness be more than the above-mentioned upper limit in the case where, it is possible to the intracavity diameter of the hollow-fibre membrane 3 become smaller to made discharge
Pressure loss when processed water increases.
The lower limit of average pore size as support layer 8, preferably 1 μm, more preferably 1.5 μm.On the other hand, as support
The upper limit of the average pore size of layer 8, preferably 3 μm, more preferably 2.5 μm.Above-mentioned lower limit is unsatisfactory in the average pore size of support layer 8
In the case where, the water penetration of the hollow-fibre membrane 3 is possible to become inadequate.Conversely, the average pore size in support layer 8 is more than upper
In the case where stating the upper limit, which is possible to stop the transmission of impurity with being unable to fully.
The lower limit of porosity as support layer 8, preferably 40%, more preferably 50%.On the other hand, as support layer
The upper limit of 8 porosity, preferably 90%, more preferably 85%.The case where the porosity of support layer 8 is unsatisfactory for above-mentioned lower limit
Under, the water penetration of the hollow-fibre membrane 3 is possible to become inadequate.Conversely, the porosity in support layer 8 is more than the above-mentioned upper limit
In the case of, the intensity of support layer 8 or even the hollow-fibre membrane 3 is possible to become inadequate.
The lower limit of average thickness as filter layer 9, preferably 10 μm, more preferably 12 μm.On the other hand, as filtering
The upper limit of the average thickness of layer 9, preferably 100 μm, more preferably 80 μm.Filter layer 9 average thickness be unsatisfactory for it is above-mentioned under
In the case where limit, which is possible to stop the transmission of impurity with being unable to fully.Conversely, in the average thickness of filter layer 9
In the case that degree is more than the above-mentioned upper limit, the water penetration of the hollow-fibre membrane 3 is possible to become inadequate.
The lower limit of average pore size as filter layer 9, preferably 0.01 μm, more preferably 0.05 μm.On the other hand, as
The upper limit of the average pore size of filter layer 9, preferably 0.45 μm, more preferably 0.3 μm.It is unsatisfactory in the average pore size of filter layer 9
In the case where above-mentioned lower limit, the water penetration of the hollow-fibre membrane 3 is possible to become inadequate.Conversely, in the average hole of filter layer 9
In the case that diameter is more than the above-mentioned upper limit, which is possible to stop the transmission of impurity with being unable to fully.
The lower limit of porosity as filter layer 9, preferably 40%, more preferably 50%.On the other hand, as filter layer
The upper limit of 9 porosity, preferably 80%, more preferably 70%.The case where the porosity of filter layer 9 is unsatisfactory for above-mentioned lower limit
Under, the water penetration of the hollow-fibre membrane 3 is possible to become inadequate.Conversely, the porosity in filter layer 9 is more than the above-mentioned upper limit
In the case of, the aperture of the hollow-fibre membrane 3 is possible to become uneven.
(resin involucra)
Resin involucra 7 is coated the outer surface and internal voids surface of framework material 6, and assigns to the hollow-fibre membrane 3
Hydrophily.
As the main component of resin involucra 7, the macromolecule with hydrophilic parts and hydrophobic parts is used.By making
Resin involucra 7 is using the macromolecule with hydrophilic parts and hydrophobic parts as main component, thus high molecular hydrophobicity
Part has the adhesion with framework material 6, and high molecular hydrophilic parts improve the water penetration of the hollow-fibre membrane 3, and
And inhibit incrustation.In addition, in addition to making the high score as main component with hydrophilic parts and hydrophobic parts in resin involucra 7
Other than son, such as the impurity such as additive, reaction residues can also be contained.
About the macromolecule with hydrophilic parts and hydrophobic parts of the main component as resin involucra 7, such as
Ethylene-vinyl alcohol copolymer, polyvinyl formal, phenol system macromolecule etc. can be used, wherein can it is preferable to use ethylene-second
Enol copolymer.The ethylene moiety of ethylene-vinyl alcohol copolymer shows hydrophobicity, vinyl alcohol moieties (especially its hydroxyl) table
Reveal hydrophily.
The lower limit of copolymerization ratio about the ethylene in the ethylene-vinyl alcohol copolymer of the main component as resin involucra 7,
Preferably 20mol%, more preferably 22mol%, further preferably 24mol%.On the other hand, about as resin involucra 7
Main component ethylene-vinyl alcohol copolymer in ethylene copolymerization ratio the upper limit, preferably 60mol%, more preferably
55mol%, further preferably 50mol%.In the ethylene-vinyl alcohol copolymer of the main component as resin involucra 7
It in the case that the copolymerization ratio of ethylene is unsatisfactory for above-mentioned lower limit, is possible to become inadequate with the adhesion of framework material 6, be not easy
It is coated the surface of framework material 6 evenly.Conversely, in the ethylene-vinyl alcohol copolymer of the main component as resin involucra 7
In the case that the copolymerization ratio of ethylene is more than the above-mentioned upper limit, it is possible to make the water penetration of the hollow-fibre membrane 3 because hydrophily reduces
It becomes inadequate.
The lower limit of the average molecular weight of ethylene-vinyl alcohol copolymer about the main component as resin involucra 7, preferably
It is 5000, more preferably 10000.On the other hand, the ethylene-vinyl alcohol copolymer about the main component as resin involucra 7
Average molecular weight the upper limit, preferably 100000, more preferably 50000.In the second of the main component as resin involucra 7
In the case that alkene-ethenol copolymer average molecular weight is unsatisfactory for above-mentioned lower limit, resin involucra 7 is possible to become easy stripping
From.Conversely, the average molecular weight in the ethylene-vinyl alcohol copolymer of the main component as resin involucra 7 is more than the above-mentioned upper limit
In the case where, it is possible to resin involucra 7 are formed because being not easy due to increase the manufacturing cost of the hollow-fibre membrane 3.It needs to illustrate
It is that " average molecular weight " refers to that " plastics-find out high molecular foundation JIS-K7252-1 (2008) based on Size Exclusion Chromatography
Method-the 1 of average molecular weight and molecular weight distribution: general rule ", the matter measured using gel permeation chromatography (GPC) are equal
Molecular weight.
The lower limit of average thickness as resin involucra 7, preferably 2nm, more preferably 5nm.On the other hand, as resin
The upper limit of the average thickness of epithelium 7, preferably 50nm, more preferably 30nm.It is unsatisfactory in the average thickness of resin involucra 7 above-mentioned
In the case where lower limit, it is possible to can not continuously be coated framework material 6, improve the permeable of the hollow-fibre membrane 3 with being unable to fully
Property and resistance to incrustation.Conversely, in the case where the average thickness of resin involucra 7 is more than the above-mentioned upper limit, it is possible to because of the hollow fibre
The porosity of dimension film 3 reduces and becomes inadequate water penetration.
The lower limit of amount as the resin involucra 7 in the hollow-fibre membrane 3, preferably 0.1 mass %, more preferably 0.2
Quality %.On the other hand, the upper limit as the amount of the resin involucra 7 in the hollow-fibre membrane 3, preferably 2 mass %, more preferably
For 1 mass %.In the case that the amount of resin involucra 7 in the hollow-fibre membrane 3 is unsatisfactory for above-mentioned lower limit, it is possible to Wu Falian
Be coated framework material 6 continuously, improve with being unable to fully the hollow-fibre membrane 3 water penetration and resistance to incrustation.Conversely, hollow at this
In the case that the amount of resin involucra 7 in tunica fibrosa 3 is more than the above-mentioned upper limit, it is possible to because the porosity of the hollow-fibre membrane 3 drops
It is low and become inadequate water penetration.
(manufacturing method of hollow-fibre membrane)
The hollow-fibre membrane 3 can be manufactured by having the step of following steps: be made solvent impregnated in skeleton material
Step in material 6 imports material (the resin involucra formation material for forming resin involucra 7 in the framework material 6 for being impregnated with solvent
Material) aqueous solution the step of, and the step of framework material 6 of the aqueous solution containing resin involucra forming material is dried.
As solvent used in above-mentioned impregnation steps, as long as the wetability for polytetrafluoroethylene (PTFE) is high and affine with water
The high solvent of property, can be used for example isopropanol etc..
In above-mentioned steps for importing, for example, passing through the aqueous solution that framework material 6 is impregnated in resin involucra forming material
In, to import the aqueous solution of resin involucra forming material in the hole of framework material 6.Herein, by framework material 6
Hole in the filling solvent high with the compatibility of the aqueous solution of resin involucra forming material, so as to mitigate resin involucra shape
At the surface tension of the aqueous solution of material, the aqueous solution of resin involucra forming material is relatively easily imported into framework material 6
Hole in.
As the lower limit for the time being impregnated in framework material 6 in the aqueous solution of resin involucra forming material, such as depend on
In conditions such as the types, the concentration of aqueous solution, temperature of resin involucra forming material, but preferably 5 minutes, more preferably 30 points
Clock.On the other hand, the upper limit as the time being impregnated in framework material 6 in the aqueous solution of resin involucra forming material, preferably
It is 6 hours, more preferably 9 hours.It is discontented in the time that framework material 6 is impregnated in the aqueous solution of resin involucra forming material
In the case where the above-mentioned lower limit of foot, it is possible to can not fully imported into resin involucra forming material in the hole of framework material 6.
Conversely, in the case where the time being impregnated in framework material 6 in the aqueous solution of resin involucra forming material being more than the above-mentioned upper limit,
It is possible that reducing the porosity of framework material 6 because of the excessive attachment of resin.
As the lower limit of the resin involucra forming material content (solid component content) in above-mentioned aqueous solution, preferably 0.1
Quality %, more preferably 0.2 mass %.On the other hand, as the upper of the resin involucra forming material content in above-mentioned aqueous solution
Limit, preferably 2 mass %, more preferably 1 mass %.It is unsatisfactory in the resin involucra forming material content in above-mentioned aqueous solution
In the case where stating lower limit, it is possible to the resin involucra 7 on the surface of continuous coating framework material 6 can not be formed.Conversely, in above-mentioned water
In the case that resin involucra forming material content in solution is more than the above-mentioned upper limit, it is possible to can not be in the hole of framework material 6
Interior aqueous impregnation solution or block the hole of framework material 6.
In above-mentioned drying steps, the solvent in the intrapore above-mentioned aqueous solution by making framework material 6 evaporates, thus
Make resin involucra forming material in the membranaceous outer surface for being attached to framework material 6 and internal voids surface.
As the drying temperature (atmosphere temperature) in the drying steps, such as it can be set to 0 DEG C or more and 60 DEG C hereinafter, allusion quotation
Type is set to room temperature.In addition, as the drying time in the drying steps, such as can be set to 5 minutes or more and 24 hours
Below.
Holding member > on the upside of <
1st holding member 4 keeps the upper end of multiple hollow-fibre membranes 3.1st holding member 4 is formed and institute
The inner space of the inner cavity connection of the hollow-fibre membrane 3 kept, and there is waste water nozzle 10, the waste water nozzle 10 is interior from this
Portion space is discharged through the filtered processed water of the hollow-fibre membrane 3.That is, the waste water of filter pump 2 and the 1st holding member 4
Nozzle 10 connects.
Holding member > on the downside of <
2nd holding member 5 keeps the lower end of multiple hollow-fibre membranes 3.2nd holding member 5 can with it is above-mentioned
1st holding member 4 is identically formed inner space, can also be by the way that the opening of the hollow-fibre membrane 3 is blocked such method
The lower end of the hollow-fibre membrane 3 is kept.2nd holding member 5 or the component that the hollow-fibre membrane 3 turns back.
That is, the lower end of the adjacent hollow-fibre membrane 3 can be connected in the filter assemblies 1.
(advantage)
For the hollow-fibre membrane 3, it is set as by the C heavy oil contact angle in the pure water contact angle and water by outer peripheral surface
In certain range, to as described above, form resin involucra using having certain hydrophobic resin involucra forming material
7, therefore resin involucra forming material is made relatively easily to be close contact in outer surface and the internal voids table of hydrophobic framework material 6
Face.Therefore, for the hollow-fibre membrane 3, resin involucra forming material can not be made to occur in the hole of framework material 6
Chemical reaction, and with relatively certain quality and more inexpensively formation improves processing by above-mentioned impregnation steps and drying steps
The resin involucra 7 of ability (water penetration) and resistance to incrustation.In addition, the filter element and wastewater treatment equipment have used the hollow fibre
Film 3 is tieed up, therefore relatively cheap, processing capacity is big, and is not likely to produce incrustation.
[other embodiments]
It will be understood that the full content of embodiment of disclosure is all to illustrate, it is not restrictive content.This
Structure that the range of invention is not limited to the above embodiment, but be shown in the claims, and be intended to include and power
Whole changes in sharp claim equivalent meaning and range.
The negative pressure that the filter assemblies are not limited by inner peripheral surface side penetrates treated water to the impregnated mistake of inner peripheral surface side
Component is filtered, such as can also be set as: the periphery surface side of hollow-fibre membrane is set as high pressure and penetrates treated water to hollow fibre
The inner peripheral surface side of hollow-fibre membrane is set as high pressure and penetrates treated water to hollow fibre by the external-compression type for tieing up the inner peripheral surface side of film
Tie up any form of filter assemblies such as the inner pressed of periphery surface side of film.
The filter assemblies can be used for filtering the treated water other than the water containing activated sludge.
For the wastewater treatment equipment other than the processing sink configured with the filter assemblies, can also have makes treated water
In suspended material precipitating sink, carry out exclusively with activated sludge sink of decomposition etc. of organic matter.
Embodiment
Hereinafter, based on embodiment, the present invention is described in detail, but cannot be limited based on the record of the embodiment
Explain the present invention to property.
< hollow-fibre membrane >
Be produced as follows the trial-production example 1~3 of hollow-fibre membrane: the hollow-fibre membrane is to be formed by polytetrafluoroethylene (PTFE) and be averaged
Outer diameter is formed flat by ethylene-vinyl alcohol copolymer on the outer surface and internal voids surface for the framework material of the tubular of 2.3mm
With a thickness of the resin involucra of 20nm, above-mentioned framework material has that average thickness is 600 μm, average pore size is 2 μm, porosity is
The filter layer that 80% support layer and average thickness is 15 μm, average pore size is 0.3 μm, porosity is 60%.
In the trial-production example 1 of hollow-fibre membrane, the copolymerization ratio of the ethylene in ethylene-vinyl alcohol copolymer is set as 27mol%.
In the trial-production example 2 of hollow-fibre membrane, the copolymerization ratio of the ethylene in ethylene-vinyl alcohol copolymer is set as 32mol%.Doughnut
In the trial-production example 3 of film, the copolymerization ratio of the ethylene in ethylene-vinyl alcohol copolymer is set as 44mol%.
The formation of resin involucra carries out in the following way: firstly, framework material is impregnated in isopropanol 1 hour, connecing
Get off, is impregnated 6 hours in the aqueous solution of 0.4 mass % concentration of above-mentioned ethylene-vinyl alcohol copolymer, and gained sample is existed
It is 3 hours dry in room temperature.
For the trial-production example 1~3 of above-mentioned hollow-fibre membrane, hollow-fibre membrane is cut and be made it is planar, to outer peripheral surface
Pure water contact angle and water in C heavy oil contact angle be measured.It should be noted that " pure water contact angle " passes through JIS-
" sessile drop method " of R3257 (1999) defined is measured.In addition, " the C heavy oil contact angle in water " is hollow after cutting
The periphery of tunica fibrosa is horizontally configured in pure water down, and the oil droplet of C heavy oil is statically placed on the outer peripheral surface of hollow-fibre membrane,
The angle between the outer peripheral surface and oil droplet of hollow-fibre membrane is measured in the same manner as " contact angle " of JIS-R3257 (1999) defined
Degree.
In addition, production has the doughnut that 48 effective lengths are 40cm using the trial-production example 1~3 of hollow-fibre membrane
The filter assemblies of film, are measured permeable amount.About permeable amount, filter assemblies are impregnated in pure water, aspirate doughnut
The inner cavity of film and the inside and outside pressure difference 20kPa for making hollow-fibre membrane, to be measured to the water aspirated.
The pure water contact angle and the C heavy oil in water that the outer peripheral surface of the trial-production example 1~3 of hollow-fibre membrane is shown in the following table 1 connect
The measurement result of the permeable amount of feeler and filter assemblies.
[table 1]
Further, activated sludge water is carried out in the filter assemblies of the trial-production example 1~3 by using hollow-fibre membrane
After filtering 5 days, confirms its appearance, as a result do not observe incrustation.
As set forth above, it is possible to confirm: being connect by the C heavy oil in the pure water contact angle and water by the outer peripheral surface of hollow-fibre membrane
Feeler is set as in certain range, and so as to relatively be manufactured inexpensively, and permeable amount is larger, can be effectively prevented incrustation.
[explanation of symbol]
1 filter assemblies
2 filter pumps
3 hollow-fibre membranes
4 the 1st holding members
5 the 2nd holding members
6 framework materials
7 resin involucras
8 support layers
9 filter layers
10 waste water nozzles
T handles sink
Claims (6)
1. a kind of hollow-fibre membrane, comprising:
The framework material of tubular using polytetrafluoroethylene (PTFE) as main component, and has porosity；And
Resin involucra with hydrophily, and is coated the outer surface and internal voids surface of above-mentioned framework material,
The pure water contact angle of outer peripheral surface be 40 ° or more and 80 ° hereinafter,
The C heavy oil contact angle of outer peripheral surface in water is 110 ° or more and 150 ° or less.
2. hollow-fibre membrane according to claim 1, wherein
The main component of above-mentioned resin involucra is ethylene-vinyl alcohol copolymer,
The copolymerization ratio of ethylene in above-mentioned ethylene-vinyl alcohol copolymer is 20mol% or more and 60mol% or less.
3. hollow-fibre membrane according to claim 1 or 2, wherein
Above-mentioned framework material has the support layer of tubular and is laminated in the filter layer of the outer peripheral surface of the support layer,
The average thickness of above-mentioned support layer be 0.3mm or more and 1.0m hereinafter,
The average pore size of above-mentioned support layer be 1 μm or more and 3 μm hereinafter,
The porosity of above-mentioned support layer be 40% or more and 90% hereinafter,
The average thickness of above-mentioned filter layer be 10 μm or more and 100 μm hereinafter,
The average pore size of above-mentioned filter layer be 0.01 μm or more and 0.45 μm hereinafter,
The average thickness of above-mentioned resin involucra is 50nm or less.
4. hollow-fibre membrane according to claim 1,2 or 3, wherein
Bubble point is 60kPa or more and 200kPa or less.
5. a kind of filter assemblies, comprising:
More hollow-fibre membranes described in claim 1, remain the state being aligned in one direction；And
The both ends of the more hollow-fibre membranes are fixed in a pair of of holding member.
6. a kind of wastewater treatment equipment, comprising:
Sink is handled, the treated water containing activated sludge is stored；And
It is configured at filter assemblies described in the claim 5 in the processing sink.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-224141 | 2016-11-17 | ||
| JP2016224141 | 2016-11-17 | ||
| PCT/JP2017/038111 WO2018092516A1 (en) | 2016-11-17 | 2017-10-23 | Hollow-fiber membrane, filtration module, and wastewater treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109789376A true CN109789376A (en) | 2019-05-21 |
Family
ID=62145453
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780060655.XA Pending CN109789376A (en) | 2016-11-17 | 2017-10-23 | Hollow-fibre membrane, filter assemblies and wastewater treatment equipment |
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| Country | Link |
|---|---|
| JP (1) | JPWO2018092516A1 (en) |
| CN (1) | CN109789376A (en) |
| TW (1) | TW201822875A (en) |
| WO (1) | WO2018092516A1 (en) |
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| JP7090015B2 (en) * | 2018-11-08 | 2022-06-23 | オルガノ株式会社 | Iron / manganese-containing water treatment equipment and treatment method |
| CN113766967B (en) * | 2019-05-30 | 2024-02-23 | 住友电气工业株式会社 | Hollow fiber membrane, filtration module, and drainage treatment device |
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- 2017-10-23 JP JP2018551537A patent/JPWO2018092516A1/en active Pending
- 2017-10-23 CN CN201780060655.XA patent/CN109789376A/en active Pending
- 2017-10-23 WO PCT/JP2017/038111 patent/WO2018092516A1/en active Application Filing
- 2017-10-27 TW TW106137141A patent/TW201822875A/en unknown
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| CN1441692A (en) * | 2000-07-10 | 2003-09-10 | 旭化成株式会社 | Hollow thread film cartridge, hollow thread film module using cartridge and tank type filter |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201822875A (en) | 2018-07-01 |
| WO2018092516A1 (en) | 2018-05-24 |
| JPWO2018092516A1 (en) | 2019-10-17 |
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