WO2017086267A1 - 膜モジュール及び水処理システム - Google Patents
膜モジュール及び水処理システム Download PDFInfo
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- WO2017086267A1 WO2017086267A1 PCT/JP2016/083676 JP2016083676W WO2017086267A1 WO 2017086267 A1 WO2017086267 A1 WO 2017086267A1 JP 2016083676 W JP2016083676 W JP 2016083676W WO 2017086267 A1 WO2017086267 A1 WO 2017086267A1
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- WIPO (PCT)
- Prior art keywords
- water
- casing
- space
- permeated
- treated
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 235
- 239000012528 membrane Substances 0.000 title claims abstract description 131
- 238000001914 filtration Methods 0.000 claims abstract description 69
- 238000005192 partition Methods 0.000 claims abstract description 45
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 239000002356 single layer Substances 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 1
- 239000012466 permeate Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 21
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 230000008021 deposition Effects 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000008239 natural water Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000010800 human waste Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical group C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Images
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
- B01D63/06—Tubular membrane modules
- B01D63/069—Tubular membrane modules comprising a bundle of tubular membranes
-
- 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
- B01D63/06—Tubular membrane modules
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/08—Specific process operations in the concentrate stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
Definitions
- the present invention relates to a membrane module and a water treatment system for treating organic wastewater such as human waste.
- membrane separation such as MF (microfiltration) and UF (ultrafiltration) for solid-liquid separation.
- MF microfiltration
- UF ultrafiltration
- the membrane separation device a plurality of membrane modules including a cylindrical casing and a plurality of tubular filtration membranes (hollow fiber membranes) accommodated in the casing are used, and raw water is circulated inside the tubular filtration membrane.
- An apparatus using a filtration method is known (for example, see Patent Document 1).
- the permeated water that has permeated through the tubular filtration membrane is sucked by a suction pump and stored in, for example, a storage tank and used as appropriate.
- a plurality of membrane modules are placed vertically, that is, the permeate is taken out from the permeate discharge port provided in the upper part of the casing by arranging the casing so that the axis of the casing is along the vertical direction. It was general. The permeated water that permeated through the plurality of tubular filtration membranes stayed in the permeated water space inside the casing, and was then discharged from the permeated water discharge port provided in the upper part of the casing.
- the permeate discharge port when the permeate discharge port is provided in the upper part of the casing, the permeate stays without being discharged from the permeate space in the casing when the flow of the water to be circulated stops. Thereby, there existed a subject that permeation water decayed. In addition, there is a problem that scale deposition and accumulation occur due to scale components (phosphate ions, calcium ions, magnesium ions, etc.) contained in the permeated water, resulting in problems such as nozzle clogging. Further, the permeated water staying causes a back pressure on the tubular filtration membrane, resulting in a decrease in FLUX (flow rate).
- FLUX flow rate
- An object of the present invention is to provide a membrane module and a water treatment system capable of suppressing permeation of permeated water and scale deposition.
- the membrane module includes a cylindrical casing whose axis extends in the vertical direction, a first partition wall provided below the extending direction of the casing, A second partition provided above the extending direction of the casing, and extends vertically in the casing, one end connected to the first partition and the other connected to the second partition.
- Permeated water that is defined by a plurality of tubular filtration membranes having a single-layer structure copolymerized with hydrophilic monomers, the casing, the first partition walls, and the second partition walls, and that has permeated the plurality of tubular filtration membranes.
- the permeated water space into which the permeated water is introduced, and the permeated water discharge port provided at the lower part of the permeated water space for discharging the permeated water.
- a lower header space that is a space below the first partition in the internal space of the casing, and a space above the second partition in the internal space of the casing. You may provide the upper header space which is space, the to-be-processed water inlet which supplies to-be-processed water to the said upper header space, and the concentrated water discharge port which discharges to-be-processed water from the said lower header space.
- the water treatment system accommodates a biologically treated water tank that treats organic matter contained in the treated water and treated water discharged from the biologically treated water tank.
- a membrane separation apparatus that has a raw water tank, a membrane module according to any one of (1) and (2), and that separates treated water supplied from the raw water tank into permeated water and concentrated water, and the concentrated water And a return line for returning the concentrated water to the biological treatment water tank, and the concentrated water is not returned to the raw water tank.
- the membrane filtration membrane has hydrophilicity, so that the membrane surface flow rate can be lowered, so that the circulation flow rate of the water to be treated can be reduced.
- natural water tank required in the case of a hydrophobic membrane become unnecessary.
- the diameter of the pipe can be reduced by reducing the flow rate.
- by reducing the flow rate it is possible to reduce equipment such as a flow meter.
- the permeated water is discharged from the permeated water discharge port provided at the lower part.
- permeated water does not stay in the permeated water space, and the permeated water can be prevented from decaying and scale deposition.
- the tubular filtration membrane by forming the tubular filtration membrane with a hydrophilic material, it is possible to prevent damage due to drying of the tubular filtration membrane even when the flow of water to be treated stops.
- the water treatment system 10 having the membrane module 1 of the first embodiment of the present invention includes a biological treatment water tank 11 for treating organic substances contained in the water to be treated W1 (organic wastewater including human waste and septic tank sludge), and a biological treatment water tank 11.
- the biological treatment water tank 11 is a device that decomposes and removes BOD, nitrogen compounds, and the like in the liquid by the action of nitrifying bacteria and denitrifying bacteria, for example.
- To-be-treated water tank 11 is supplied with treated water W ⁇ b> 1 through first pipe 15.
- the biological treatment water tank 11 and the raw water tank 12 are connected by a second pipe 16.
- the membrane separation device 13 includes a plurality of membrane modules 1.
- the plurality of membrane modules 1 are arranged in parallel.
- the plurality of membrane modules 1 are arranged vertically in the housing of the membrane separation device 13. That is, the axis A of the cylindrical casing 2 (see FIG. 2) of the membrane module 1 extends in the vertical direction.
- the membrane module 1 has a casing 2 and a plurality of tubular filtration membranes 3 arranged inside the casing 2.
- the membrane separation device 13 is a device that takes out the permeated water PW from the water to be treated W3 by using a method of filtering the water to be treated W3 while circulating it inside the tubular filtration membrane 3.
- the raw water tank 12 and the membrane separation device 13 are connected via a raw water supply pipe 17.
- a circulation pump 21 is provided in the raw water supply pipe 17.
- the water to be treated W stored in the raw water tank 12 is supplied to the membrane separation device 13 while being pressurized by the circulation pump 21.
- the permeated water PW separated from the membrane separation device 13 is introduced into the permeated water pipe 18.
- the permeated water pipe 18 is connected to the storage tank 20. That is, the permeate outlet 9 (see FIG. 2) of the membrane module 1 is connected to the permeate pipe 18.
- a suction pump 22 is provided in the permeate water pipe 18.
- the concentrated water W4 separated from the permeated water PW and discharged from the membrane separation device 13 is returned to the biological treatment water tank 11 through the return pipe 19 (return line) except for excess sludge. That is, the concentrated water discharge port 8 (see FIG. 2) of the membrane module 1 is connected to the return pipe 19. Therefore, the concentrated water W4 is not returned to the raw water tank 12.
- the treated water W2 discharged from the biological treatment water tank 11 returns to the biological treatment water tank 11 via the raw water tank 12 and the membrane separator 13. That is, the to-be-processed water W circulates through the piping of the water treatment system 10.
- the plurality of membrane modules 1 are arranged in parallel. Specifically, the raw water supply pipe 17, the permeate water pipe 18, and the return pipe 19 are connected to each membrane module 1.
- the membrane module 1 includes a cylindrical casing 2 and a plurality of tubular filtration membranes 3.
- the casing 2 includes a cylindrical casing body 4, a first side wall 5 that closes a lower end of the casing body 4, a second side wall 6 that closes an upper end of the casing body 4, and a processing target formed on the casing body 4. It has a water introduction port 7, a concentrated water discharge port 8 formed in the casing body 4, and a permeate discharge port 9 formed in the casing body 4.
- the membrane module 1 includes a first partition wall 30 and a second partition wall 31 that divide the inside of the casing 2 into three spaces.
- a plurality of insertion holes 32 are formed in the first partition wall 30 and the second partition wall 31.
- the insertion hole 32 is a hole that penetrates the first partition wall 30 and the second partition wall 31 in the plate thickness direction.
- the inner diameter of the insertion hole 32 is slightly larger than the outer diameter of the tubular filtration membrane 3.
- the plurality of tubular filtration membranes 3 extend in the vertical direction inside the casing 2, one end is connected to the first partition wall 30, and the other end is connected to the second partition wall 31.
- the first partition 30 is a plate-shaped member, and is fixed below the extending direction of the casing 2 (on the first side wall 5 side).
- a space surrounded by the casing body 4, the first partition wall 30, and the first side wall 5 is a lower header space S1.
- the lower header space S ⁇ b> 1 is a space below the first partition wall 30 in the internal space of the casing 2.
- the second partition wall 31 is a plate-shaped member, and is fixed above the extending direction of the casing 2 (on the second side wall 6 side).
- a space surrounded by the casing body 4, the second partition wall 31 and the second side wall 6 is an upper header space S2.
- the upper header space S ⁇ b> 2 is a space above the second partition wall 31 in the internal space of the casing 2.
- the space surrounded by the casing body 4, the first partition wall 30, and the second partition wall 31 is a permeated water space S3.
- the permeated water PW taken out from the plurality of tubular filtration membranes 3 is discharged into the permeated water space S ⁇ b> 3 and then introduced into the permeated water pipe 18 through the permeated water discharge port 9.
- the treated water introduction port 7 is an opening that allows communication between the outside of the casing 2 and the lower header space S1.
- the treated water inlet 7 is formed in the casing body 4.
- the treated water introduction port 7 is provided between the first partition wall 30 and the first side wall 5 in the axis A direction of the casing 2.
- the concentrated water discharge port 8 is an opening that allows communication between the outside of the casing 2 and the upper header space S2.
- the concentrated water discharge port 8 is formed in the casing body 4.
- the concentrated water discharge port 8 is provided between the second partition wall 31 and the second side wall 6 in the axis A direction of the casing 2.
- the permeated water discharge port 9 is an opening that allows communication between the outside of the casing 2 and the permeated water space S3.
- the permeated water discharge port 9 is formed in the casing body 4.
- the permeate discharge port 9 is provided between the first partition wall 30 and the second partition wall 31 in the axis A direction of the casing 2.
- the permeate discharge port 9 of the present embodiment is provided in the lower part of the permeate space S3. In other words, the permeated water discharge port 9 is provided slightly above the first partition wall 30.
- the permeate discharge port 9 is preferably provided at the lower end of the permeate space S3.
- the permeated water discharge port 9 is formed at a position where the permeated water PW that has passed through the plurality of tubular filtration membranes 3 can be discharged as much as possible without staying in the permeated water space S3. Moreover, the permeated water pipe 18 connected to the permeated water discharge port 9 is inclined downward. That is, the permeated water pipe 18 has a shape such that the permeated water PW discharged from the permeated water discharge port 9 does not return due to gravity.
- the casing body 4 is provided with an air vent 34 for communicating the outside of the casing 2 and the permeated water space S3.
- the air vent 34 is provided in the upper part of the permeated water space S3.
- each tubular filtration membrane 3 is fixed to the inner peripheral surface of the insertion hole 32 after being inserted into the insertion hole 32 of the first partition wall 30.
- a space between the inner peripheral surface of the insertion hole 32 and the outer peripheral surface of the tubular filtration membrane 3 is sealed with a sealing material (not shown).
- a sealing material a material that has an initial viscosity and hardens with time, such as an epoxy resin or a urethane resin, is preferable.
- the other end of each tubular filtration membrane 3 is fixed to the insertion hole 32 of the second partition wall 31 in the same manner as one end of the tubular filtration membrane 3.
- the tubular filtration membrane 3 has a cylindrical shape, and is formed of a polymer filtration membrane having a single layer structure in which a hydrophilic monomer is copolymerized on a single main constituent material. That is, the tubular filtration membrane 3 is formed of a single material as a main material. That the main material is formed of one kind of material means that one kind of resin occupies 50% by mass or more in the material (for example, resin) forming the tubular filtration membrane 3. The fact that the main material is formed of one kind of material means that the nature of the one kind of material dominates the nature of the constituent material. Specifically, it means a material in which one kind of resin has 50 mass% to 99 mass%.
- the main materials constituting the tubular filtration membrane 3 include polyolefin chlorides such as vinyl chloride resin, polysulfone (PS), polyvinylidene fluoride (PVDF), polyethylene (PE), polyacrylonitrile (PAN), and polyether.
- Polymer materials such as sulfone, polyvinyl alcohol (PVA), and polyimide (PI) can be used.
- a vinyl chloride resin is particularly preferable.
- vinyl chloride resins include vinyl chloride homopolymer (vinyl chloride homopolymer), a copolymer of a monomer having an unsaturated bond copolymerizable with vinyl chloride monomer and vinyl chloride monomer, and vinyl chloride monomer in the polymer.
- vinyl chloride resins include graft copolymers obtained by graft copolymerization, and (co) polymers composed of chlorinated vinyl chloride monomer units.
- hydrophilic monomers examples include: (1) A cationic group-containing vinyl monomer such as an amino group, an ammonium group, a pyridyl group, an imino group or a betaine structure and / or a salt thereof, (2) Hydrophilic nonionic group-containing vinyl monomers such as hydroxyl groups, amide groups, ester structures, ether structures, (3) Anionic group-containing vinyl monomer such as carboxyl group, sulfonic acid group, phosphoric acid group and / or salt thereof, (4) Other monomers may be mentioned.
- the tube diameter of the tubular filtration membrane can be appropriately selected depending on the properties of the water to be treated W.
- the inner diameter of the tubular filtration membrane 3 is 5 mm.
- the inner diameter of the tubular filtration membrane 3 is 5 mm-10 mm, and when the coarse fiber amount ⁇ is 500 mg / liter or more, the inner diameter of the tubular filtration membrane 3 is Can be 10 mm or more.
- the water to be treated W1 is treated in the biological treatment water tank 11. Specifically, the organic substance contained in the for-treatment water W1 is decomposed by microorganisms.
- the water to be treated W2 discharged from the biological treatment water tank 11 is stored in the raw water tank 12.
- the treated water W3 discharged from the raw water tank 12 is supplied to the membrane separation device 13 via the circulation pump 21, it is sent into the tubular filtration membrane 3 of the membrane module 1.
- Permeated water PW permeated from the tubular filtration membrane 3 flows into the permeated water space S3.
- the permeated water PW in the permeated water space S3 flows downward by gravity.
- the permeated water PW that has flowed downward in the permeated water space S3 is discharged from the permeated water discharge port 9 provided in the lower portion of the permeated water space S3, and is stored in the storage tank 20 via the permeated water pipe 18.
- Concentrated water W4 discharged from the membrane separation device 13 is returned to the biological treatment water tank 11 through the return pipe 19 for the entire amount excluding excess sludge, and is processed again.
- the water treatment system 10 is stopped, the entire amount of the permeated water PW in the permeate water space S3 is discharged out of the permeate water space S3. In other words, even when the flow of the water to be treated W3 is stopped by stopping the circulation pump 21, the permeate PW does not stay in the permeate space S3.
- the permeated water PW is discharged from the permeated water discharge port 9 provided in the lower part. Thereby, the permeated water PW does not stay in the permeated water space S3, and the permeation of the permeated water PW and scale deposition can be suppressed.
- the tubular filtration membrane 3 is formed of a hydrophilic material, thereby Even when the processing system 10 is stopped, the tubular filtration membrane 3 is not damaged by drying.
- the air release port 34 is provided in the casing body 4, the air pressure in the permeated water space S ⁇ b> 3 becomes atmospheric pressure, thereby preventing the permeated water PW from being difficult to be discharged from the permeated water discharge port 9. be able to. Further, by providing the air vent 34, the permeate PW in the permeate space S3 can be discharged to the outside of the casing 2 even when the suction pump 22 is stopped.
- the membrane surface flow rate of the water to be treated W3 can be lowered.
- the membrane surface flow velocity can be set to, for example, 0.15 m / s-0.30 m / s.
- the tubular filtration membrane 3 When the tubular filtration membrane 3 is hydrophobic, it is necessary to increase the membrane surface flow velocity (for example, 2.5 m / s). For this reason, the circulation flow rate increases, and it becomes necessary to return the concentrated water W4 discharged from the membrane separation device 13 to the raw water tank 12 and the biological treatment water tank 11.
- a distribution tank and piping for distributing the concentrated water W4 to the raw water tank 12 and the biological treatment water tank 11 are required.
- the water treatment system 10 of the present embodiment can reduce the membrane surface flow velocity, the circulation flow rate of the water to be treated W can be reduced. Thereby, the power of the circulation pump 21 can be reduced. Moreover, the distribution tank which distributes the concentrated water W4 to the raw
- the membrane module 1 in which the tubular filtration membranes 3 are arranged in parallel is adopted as the membrane module 1, but the present invention is not limited to this.
- a plurality of tubular filtration membranes 3 may be connected in series. That is, a plurality of U-shaped connection members 46 that connect one end of the plurality of tubular filtration membranes 3 and the other end of the tubular filtration membrane 3 so that the plurality of tubular filtration membranes 3 are connected in series. It is good also as a structure to have.
- the treated water introduction port 7 and the concentrated water discharge port 8 are directly connected to the plurality of tubular filtration membranes 3 connected in series via the connecting member 47 and the connecting member 48, and the treated water W3 is supplied. It may be introduced and the concentrated water W4 may be discharged.
- the upper header space S2 may be omitted, and the configuration of the casing may be changed, for example, the second side wall 6 may be eliminated.
- the membrane module 1 of 2nd embodiment of this invention is demonstrated based on drawing. In the present embodiment, differences from the first embodiment described above will be mainly described, and description of similar parts will be omitted.
- the treated water inlet 7 of the membrane module 1 of the present embodiment is connected to the upper header space S2, and the concentrated water outlet 8 is connected to the lower header space S1.
- the treated water W flows from the upper side to the lower side.
- the membrane module 1 of the present invention can be configured such that the water to be treated W3 flows downward as in the above embodiment. In this case, it is desirable to install a siphon breaker.
- the permeated water is discharged from the permeated water discharge port provided at the lower part.
- permeated water does not stay in the permeated water space, and the permeated water can be prevented from decaying and scale deposition.
- the tubular filtration membrane by forming the tubular filtration membrane with a hydrophilic material, it is possible to prevent damage due to drying of the tubular filtration membrane even when the flow of water to be treated stops.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020187013440A KR102066365B1 (ko) | 2015-11-18 | 2016-11-14 | 막 모듈 및 수처리 시스템 |
CN201680065824.4A CN108348861B (zh) | 2015-11-18 | 2016-11-14 | 膜组件以及水处理*** |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015-225959 | 2015-11-18 | ||
JP2015225959A JP6405596B2 (ja) | 2015-11-18 | 2015-11-18 | 膜モジュール及び水処理システム |
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WO2017086267A1 true WO2017086267A1 (ja) | 2017-05-26 |
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PCT/JP2016/083676 WO2017086267A1 (ja) | 2015-11-18 | 2016-11-14 | 膜モジュール及び水処理システム |
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JP (1) | JP6405596B2 (ko) |
KR (1) | KR102066365B1 (ko) |
CN (1) | CN108348861B (ko) |
TW (1) | TW201722856A (ko) |
WO (1) | WO2017086267A1 (ko) |
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JP6405596B2 (ja) | 2018-10-17 |
KR20180069848A (ko) | 2018-06-25 |
CN108348861A (zh) | 2018-07-31 |
JP2017094229A (ja) | 2017-06-01 |
KR102066365B1 (ko) | 2020-01-14 |
TW201722856A (zh) | 2017-07-01 |
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