WO2013031231A1 - 海水淡水化方法 - Google Patents
海水淡水化方法 Download PDFInfo
- Publication number
- WO2013031231A1 WO2013031231A1 PCT/JP2012/005512 JP2012005512W WO2013031231A1 WO 2013031231 A1 WO2013031231 A1 WO 2013031231A1 JP 2012005512 W JP2012005512 W JP 2012005512W WO 2013031231 A1 WO2013031231 A1 WO 2013031231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- water
- treated water
- ultraviolet irradiation
- treatment
- Prior art date
Links
- 239000013535 sea water Substances 0.000 title claims abstract description 37
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000011282 treatment Methods 0.000 claims abstract description 46
- 239000010802 sludge Substances 0.000 claims abstract description 35
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 30
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims description 10
- 239000002351 wastewater Substances 0.000 claims description 7
- 239000013505 freshwater Substances 0.000 claims description 6
- 239000010815 organic waste Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 244000005700 microbiome Species 0.000 description 8
- 239000010840 domestic wastewater Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 102100037364 Craniofacial development protein 1 Human genes 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 101000880187 Homo sapiens Craniofacial development protein 1 Proteins 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
-
- 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
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2611—Irradiation
- B01D2311/2619—UV-irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
-
- 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
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
-
- 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
Definitions
- the present invention relates to a seawater desalination method in which seawater is pretreated and then desalinated using a reverse osmosis membrane.
- seawater desalination from seawater is required in coastal metropolises in dry and semi-arid areas where it is difficult to stably secure water resources.
- seawater desalination evaporation methods implemented in large-scale plants in high-temperature areas and membrane methods that desalinate using reverse osmosis membranes have been commercialized. Therefore, seawater desalination by the membrane method is attracting attention.
- seawater is treated with ultrafiltration membranes or low-pressure reverse osmosis membranes in order to prevent contaminants such as polymers from flowing into the reverse osmosis membranes and reducing the processing efficiency.
- ultrafiltration membranes or low-pressure reverse osmosis membranes In order to increase the energy efficiency by reducing the concentration of salt flowing into the reverse osmosis membrane by using a reverse osmosis membrane after treatment with water, river water and membrane-separated activated sludge treated water are mixed with seawater. Then, a method of desalting using a reverse osmosis membrane has been proposed (for example, see Patent Document 1).
- the object of the present invention is to provide a seawater desalination method that has a high biofouling suppression effect and can be used continuously for a long period of time in seawater desalination using a reverse osmosis membrane.
- the present invention is a seawater desalination method for obtaining fresh water from seawater by reverse osmosis membrane treatment, the step of obtaining seawater from ultrafiltration membrane treatment to obtain ultrafiltration membrane treated water, and organic wastewater from membrane separation activated sludge Processing to obtain a membrane-separated activated sludge treated water, mixing the ultrafiltration membrane-treated water and the membrane-separated activated sludge treated water to obtain a mixed water, and subjecting the mixed water to an ultraviolet irradiation
- a seawater desalination method comprising the steps of: obtaining irradiation treatment water; and subjecting the ultraviolet irradiation treatment water to a reverse osmosis membrane treatment.
- the osmotic pressure of the mixed water can be reduced by mixing the treated water obtained by treating the sewage with membrane separation activated sludge with the ultrafiltration membrane treated water of seawater, the operating pressure during the reverse osmosis membrane treatment A certain amount of fresh water can be produced with reduced energy consumption.
- ultraviolet irradiation treatment is used to suppress biofouling of microorganisms and the like that increase in the reverse osmosis membrane module and in the mixing tank with the use of the membrane separation activated sludge treated water.
- the membrane-separated activated sludge treated water or seawater is mixed as it is, the turbidity of this mixed water becomes high, and the ultraviolet treatment efficiency is remarkably deteriorated.
- the present invention eliminates the use of chlorine-based disinfectants such as chloramine and SBS, thereby reducing the deterioration of the reverse osmosis membrane and producing by-products such as those generated during other sterilization processes such as trihalomethane. It enables stable seawater desalination over a long period without sedimentation.
- the present invention includes a step of treating the seawater 2 with an ultrafiltration membrane module 4 to obtain ultrafiltration membrane treated water, as shown in FIG.
- the waste water 1 has a step of obtaining a membrane separation activated sludge treated water through a membrane separation activated sludge treatment device 9, and the ultrafiltration membrane treated water obtained by these treatments and the membrane separation activated sludge treated water are mixed.
- ultraviolet irradiation treated water is obtained from the mixed water using the ultraviolet irradiation treatment device 6.
- This ultraviolet irradiation treatment water is supplied to the reverse osmosis membrane module 8 to obtain fresh water.
- the ultrafiltration membrane may be a conventionally known ultrafiltration membrane such as polysulfone, polyacrylonitrile, cellulose acetate, polyamide, polycarbonate, polyvinyl alcohol or the like. It may be used and is not particularly limited. As the shape, any shape of a hollow fiber membrane (capillary, follow fiber, etc.), a flat membrane, or a tubular membrane can be used, and these are bundled to form a module.
- the average pore size of the ultrafiltration membrane is preferably about 1 to 100 nm.
- the organic wastewater 1 to be treated is particularly limited as long as it can be biologically treated in a normal membrane separation activated sludge treatment apparatus, such as sewage and domestic wastewater. Is not to be done.
- the filtration membrane 3 used for the membrane separation activated sludge treatment is, for example, a flat membrane in which a filtration membrane is bonded to both sides of the frame with a filtration water flow path material interposed between them in order to improve the handleability and physical durability of the filtration membrane.
- An element structure is preferable.
- the structure of the filtration membrane 3 is not particularly limited, and a microfiltration membrane, an ultrafiltration membrane, or the like can be used.
- a flat membrane element structure is preferably used because of its high effect of removing contaminants.
- the flat membrane element structure includes a rotating flat membrane structure.
- Examples of the membrane structure of the filtration membrane 3 include a porous membrane and a composite membrane obtained by combining a functional layer with a porous membrane, but are not particularly limited. Specific examples of these membranes include polyacrylonitrile porous membrane, polyimide porous membrane, polyethersulfone porous membrane, polyphenylene sulfide sulfone porous membrane, polytetrafluoroethylene porous membrane, polyvinylidene fluoride porous membrane, polypropylene
- Examples of the porous film include a porous film and a porous film such as a polyethylene porous film, and a polyvinylidene fluoride porous film and a polytetrafluoroethylene porous film are particularly preferable because of high chemical resistance.
- a composite film in which a rubbery polymer such as cross-linked silicone, polybutadiene, polyacrylonitrile butadiene, ethylene propylene rubber, or neoprene rubber is compounded as a functional layer can be given as a functional layer.
- the treatment water tank of the membrane separation activated sludge treatment apparatus 9 is not particularly limited as long as it can store the treated water and immerse the filtration membrane 3 in the treated water, but a concrete tank, a fiber reinforced plastic tank, or the like can be used. Preferably used. Moreover, the inside of the treated water tank may be divided into a plurality. Furthermore, it is good also as a membrane separation activated sludge apparatus by installing a vertically-arranged casing type membrane element together with a pressurized circulation pump pipe outside the activated sludge reaction tank.
- the activated sludge introduced into this treated water tank is generally used for wastewater treatment and the like, and the sludge extracted from other wastewater treatment facilities is usually used as seed sludge.
- the operation is performed at a sludge concentration of about 2,000 mg / L to 20,000 mg / L.
- the activated sludge treatment enables purification of water by using microorganisms as contaminants in organic wastewater.
- the mixed water tank 5 is not particularly limited as long as the filtered water from the activated sludge treatment membrane 3 and the permeated water obtained from the ultrafiltration membrane module 4 can be stored.
- a concrete tank, a fiber reinforced plastic tank Etc. are preferably used.
- a pump or the like may be provided between the filtration membrane 3 and the mixed water tank 5.
- the liquid level in the mixed water tank 5 is preferably lower than the water level of the water to be treated of the separation activated sludge treatment apparatus 9.
- the ultrafiltration membrane treated water and the membrane separation activated sludge treated water are mixed in the mixing water tank 5.
- the mixing ratio at this time is not particularly limited, but the ratio of ultrafiltration membrane treated water: membrane separation activated sludge treated water is preferably about 4: 6 to 9: 1 on a weight basis. ⁇ 6: 4 is more preferred. It is preferable to appropriately stir in the mixed water tank.
- the efficiency of the subsequent ultraviolet irradiation treatment is increased by reducing the turbidity in the mixed water tank 5.
- the turbidity at this time is preferably 0.001 to 0.5 NTU (Nephelometric Turbidity Unit), more preferably 0.2 NTU or less, and further preferably 0.1 NTU or less. This can be achieved by adjusting the mixing ratio of the ultrafiltration membrane treated water.
- the mixed water is subjected to ultraviolet irradiation treatment in the ultraviolet irradiation processing device 6.
- the ultraviolet irradiation treatment device 6 aims at sterilizing microorganisms in the mixed water and decomposing dissolved organic substances.
- the types of the ultraviolet irradiation treatment device 6 include an irradiation type that directly irradiates ultraviolet rays from the water surface, an immersion type that immerses the lamp in water, an external flow type that irradiates running water from the outside, and internal illumination that irradiates from the inside. There are various types such as a flowing water type, etc., which can be appropriately selected and used.
- Ultraviolet rays have been found to have a strong bactericidal effect in the wavelength range of 250 to 260 nm, and irradiation with a wavelength of about 185 nm is particularly effective for organic substances.
- the ultraviolet irradiation treatment device 6 can be exemplified by a device using a low-pressure mercury lamp capable of irradiating ultraviolet rays having a wavelength of about 185 nm and ultraviolet rays having a wavelength of about 254 nm, but is not limited thereto.
- UV dose required for sterilization will vary with the type of microorganism in question, preferably in the 10 mJ / cm 2 or more, preferably 140 mJ / cm 2 or less. Thereby, most bacteria can be sterilized.
- Ultraviolet irradiation treated water is supplied to the reverse osmosis membrane module 8 via the pressure pump 7 to be desalinated.
- the pressurizing pump 7 is not particularly limited, but a centrifugal pump, a diffuser pump, a spiral mixed flow pump, a mixed flow pump, a piston pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump, a vane pump, a cascade pump, a jet A pump etc. can be illustrated.
- the pressure required at this time is about 1 to 10 MPa depending on the osmotic pressure of the water to be treated and the performance of the reverse osmosis membrane module 8.
- reverse osmosis membrane module 8 for example, a composite reverse osmosis membrane in which a semipermeable polyamide skin layer is formed on a porous support such as polysulfone formed on a nonwoven fabric, a member such as a spacer or a central tube is used. At the same time, a spiral type element is used, and one or more pressure vessels are loaded.
- the piping connecting each device can be made of a material such as resin or metal.
- a material such as resin or metal.
- the ultraviolet irradiation treatment device 6 it is particularly preferable to install the ultraviolet irradiation treatment device 6 between the pressure pump 7 and the reverse osmosis membrane module 8.
- the ultraviolet irradiation process water can be directly supplied to the reverse osmosis membrane module 8 without going through any apparatus, the biofouling suppression effect in the reverse osmosis membrane module 8 further increases remarkably.
- the to-be-processed water flow path in the ultraviolet irradiation processing apparatus 6 is required to be sealed and has a pressure-resistant structure, it is preferable to configure it with an ultraviolet transmissive transparent resin or glass.
- Example 1 In the seawater desalination system shown in FIG. 1, MBR treated water obtained by subjecting domestic wastewater as organic wastewater to membrane separation activated sludge treatment using a tank-immersed filtration membrane and UF treated water obtained by treating seawater with a UF membrane were prepared.
- Table 1 shows impurity solubility TDS (Total Dissolved Solids) [%] representing the quality of treated water.
- These treated waters were mixed at a weight ratio of 5: 5 and stored in a water storage tank, and at the same time, ultraviolet rays having a wavelength of 254 nm were irradiated with 30 mJ / cm 2 using a low-pressure mercury lamp. The turbidity of the mixed water at this time was 0.1 NTU.
- Example 2 The test was conducted in the same manner as in Example 1 except that domestic wastewater and seawater were used in which the quality of domestic wastewater and seawater were different from those of Example 1. The results are shown in Table 1.
- Example 1 The test was performed in the same manner as in Example 1 except that the same seawater as in Example 1 and the same domestic wastewater as in Example 2 were used and no ultraviolet treatment was performed. The results are shown in Table 1.
- Example 3 The test was performed in the same manner as in Example 1 except that only UF treated water similar to that in Example 1 was used and MBR treated water was not mixed. The results are shown in Table 1.
- Example 4 The test was performed in the same manner as in Example 1 except that only MBR-treated water similar to that in Example 1 was used and UF-treated water was not mixed. The results are shown in Table 1.
- Example 1 and Example 2 the deterioration of the RO membrane was less than in Comparative Example 1, Comparative Example 2 and Comparative Example 4.
- Comparative Example 3 although the RO membrane was less deteriorated, only the UF treated water having a high salinity concentration was treated in a large amount by not mixing the MBR treated water. Pump pressure increased. For this reason, the fresh water energy of the comparative example 3 was 2 times or more of the fresh water energy of Example 1.
Abstract
Description
図1に示した海水淡水化システムにおいて、有機性廃水としての生活排水を槽浸漬型濾過膜で膜分離活性汚泥処理したMBR処理水と、海水をUF膜処理したUF処理水を準備した。処理水の水質を表す不純物溶解度TDS(Total Dissolved Solids)[%]を表1に示す。これらの処理水を重量比で5:5に混合して貯水槽に貯留すると同時に、低圧水銀ランプを用いて波長254nmの紫外線を30mJ/cm2照射した。このときの混合水の濁度は0.1NTUであった。紫外線処理水を連続的にRO膜(日東電工社製:「SWC5」)に通し続けたところ、膜間差圧が8週間で使用限界値(膜間差圧の初期値ΔPの2倍)に達した。表1に結果を示す。
生活排水の水質及び海水の水質が実施例1の生活排水の水質及び海水の水質と異なる生活排水及び海水を使用した以外は実施例1と同様にして試験を行った。結果を表1に示す。
実施例1と同じ海水及び実施例2と同じ生活排水を用い、紫外線処理を行わなかったこと以外は実施例1と同様にして試験を行った。結果を表1に示す。
実施例2と同様の処理水を用い、紫外線処理を行わなかったこと以外は実施例1と同様にして試験を行った。結果を表1に示す。
実施例1と同様のUF処理水のみを用い、MBR処理水を混合しなかったこと以外は実施例1と同様にして試験を行った。結果を表1に示す。
実施例1と同様のMBR処理水のみを用いてUF処理水を混合しなかったこと以外は実施例1と同様にして試験を行った。結果を表1に示す。
2 海水
3 活性汚泥処理用濾過膜
4 限外濾過膜モジュール
5 混合水槽
6 紫外線照射処理装置
7 加圧ポンプ
8 逆浸透膜モジュール
9 膜分離活性汚泥処理装置
Claims (4)
- 海水から逆浸透膜処理によって淡水を得る海水淡水化方法であって、
海水を限外濾過膜処理して限外濾過膜処理水を得るステップと、
有機性廃水を膜分離活性汚泥処理して膜分離活性汚泥処理水を得るステップと、
前記限外濾過膜処理水と前記膜分離活性汚泥処理水を混合して混合水を得るステップと、
前記混合水に紫外線照射処理して紫外線照射処理水を得るステップと、
前記紫外線照射処理水を逆浸透膜処理するステップと、を有する海水淡水化方法。 - 前記紫外線照射処理の紫外線量が10~140mJ/cm2である、請求項1に記載の海水淡水化方法。
- 前記紫外線照射処理の紫外線波長が250~260nmである、請求項1又は2に記載の海水淡水化方法。
- 前記混合水の濁度が0.001~0.5NTUである、請求項1に記載の海水淡水化方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/240,984 US9133048B2 (en) | 2011-09-02 | 2012-08-31 | Seawater desalination method |
CN201280041677.9A CN103764571A (zh) | 2011-09-02 | 2012-08-31 | 海水淡化方法 |
AU2012303366A AU2012303366A1 (en) | 2011-09-02 | 2012-08-31 | Seawater desalination method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011192135A JP2014217790A (ja) | 2011-09-02 | 2011-09-02 | 海水淡水化方法 |
JP2011-192135 | 2011-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013031231A1 true WO2013031231A1 (ja) | 2013-03-07 |
Family
ID=47755759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/005512 WO2013031231A1 (ja) | 2011-09-02 | 2012-08-31 | 海水淡水化方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9133048B2 (ja) |
JP (1) | JP2014217790A (ja) |
CN (1) | CN103764571A (ja) |
AU (1) | AU2012303366A1 (ja) |
WO (1) | WO2013031231A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019146733A1 (ja) * | 2018-01-24 | 2019-08-01 | 宇部興産株式会社 | 細胞培養装置、及びそれを使用した細胞培養方法 |
CN113830977A (zh) * | 2021-11-01 | 2021-12-24 | 成都剀瑞环保工程有限公司 | 一种新型mbr膜污水处理系统 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11447878B2 (en) | 2018-03-13 | 2022-09-20 | James Bartkowiak | Hydrogen generating cell |
CN114212929A (zh) * | 2022-01-05 | 2022-03-22 | 台州禾源净化设备科技有限公司 | 高效率反渗透海水淡化装置及操作方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006057249A1 (ja) * | 2004-11-24 | 2006-06-01 | Hitachi Zosen Corporation | 逆浸透膜法海水淡水化装置 |
WO2010061879A1 (ja) * | 2008-11-28 | 2010-06-03 | 株式会社神鋼環境ソリューション | 淡水生成方法、淡水生成装置、海水淡水化方法および海水淡水化装置 |
WO2011077815A1 (ja) * | 2009-12-25 | 2011-06-30 | 東レ株式会社 | 造水システムおよびその運転方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007069204A (ja) | 2005-08-12 | 2007-03-22 | Toray Ind Inc | 水処理方法、水処理装置、及び再生水の製造方法 |
JP4481345B1 (ja) | 2008-11-28 | 2010-06-16 | 株式会社神鋼環境ソリューション | 海水淡水化方法および海水淡水化装置 |
US8696908B2 (en) * | 2009-05-13 | 2014-04-15 | Poseidon Resources Ip Llc | Desalination system and method of wastewater treatment |
CN102060394A (zh) * | 2009-11-18 | 2011-05-18 | 东丽纤维研究所(中国)有限公司 | 一种海水淡化集成工艺 |
US9790113B2 (en) * | 2010-09-14 | 2017-10-17 | The Regents Of The University Of California | Apparatus, system and method for integrated filtration and reverse osmosis desalination |
-
2011
- 2011-09-02 JP JP2011192135A patent/JP2014217790A/ja not_active Withdrawn
-
2012
- 2012-08-31 US US14/240,984 patent/US9133048B2/en not_active Expired - Fee Related
- 2012-08-31 WO PCT/JP2012/005512 patent/WO2013031231A1/ja active Application Filing
- 2012-08-31 CN CN201280041677.9A patent/CN103764571A/zh active Pending
- 2012-08-31 AU AU2012303366A patent/AU2012303366A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006057249A1 (ja) * | 2004-11-24 | 2006-06-01 | Hitachi Zosen Corporation | 逆浸透膜法海水淡水化装置 |
WO2010061879A1 (ja) * | 2008-11-28 | 2010-06-03 | 株式会社神鋼環境ソリューション | 淡水生成方法、淡水生成装置、海水淡水化方法および海水淡水化装置 |
WO2011077815A1 (ja) * | 2009-12-25 | 2011-06-30 | 東レ株式会社 | 造水システムおよびその運転方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019146733A1 (ja) * | 2018-01-24 | 2019-08-01 | 宇部興産株式会社 | 細胞培養装置、及びそれを使用した細胞培養方法 |
JPWO2019146733A1 (ja) * | 2018-01-24 | 2020-12-03 | 宇部興産株式会社 | 細胞培養装置、及びそれを使用した細胞培養方法 |
CN113830977A (zh) * | 2021-11-01 | 2021-12-24 | 成都剀瑞环保工程有限公司 | 一种新型mbr膜污水处理系统 |
Also Published As
Publication number | Publication date |
---|---|
US20140231344A1 (en) | 2014-08-21 |
AU2012303366A1 (en) | 2014-03-13 |
JP2014217790A (ja) | 2014-11-20 |
US9133048B2 (en) | 2015-09-15 |
CN103764571A (zh) | 2014-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Warsinger et al. | A review of polymeric membranes and processes for potable water reuse | |
US9259686B2 (en) | Water producing system and operation method therefor | |
JP4923428B2 (ja) | 膜分離方法および膜分離装置 | |
WO2015083717A1 (ja) | 水処理方法 | |
JP6194887B2 (ja) | 淡水製造方法 | |
JP2011125822A (ja) | 膜モジュールの洗浄方法および造水装置 | |
WO2013111826A1 (ja) | 造水方法および造水装置 | |
KR20070095226A (ko) | 막 모듈 및 수처리 시스템 | |
JP2006272135A (ja) | 膜分離方法および膜分離装置 | |
WO2013031231A1 (ja) | 海水淡水化方法 | |
EP1894612B1 (en) | Method for purifying water by means of a membrane filtration unit | |
JP6183213B2 (ja) | 造水方法および造水装置 | |
JP2009072766A (ja) | 水処理方法 | |
JP6816292B2 (ja) | 水処理方法および水処理装置 | |
JP2005185985A (ja) | 水の製造方法および製造装置 | |
JP2011041907A (ja) | 水処理システム | |
JP4525857B1 (ja) | 水処理システムの前処理装置及び前処理方法 | |
WO2016136957A1 (ja) | 有機物含有水の処理方法および有機物含有水処理装置 | |
WO2011108589A1 (ja) | 多孔質膜モジュールの洗浄方法および造水装置 | |
JPWO2013125373A1 (ja) | 水処理装置および水処理方法 | |
JP3353810B2 (ja) | 逆浸透法海水淡水化システム | |
WO2014087991A1 (ja) | 有機性汚水の処理方法および処理装置 | |
JP2015160174A (ja) | 水処理システム | |
JP2004000938A (ja) | 造水方法 | |
JP2005040661A (ja) | 淡水またはかん水の処理方法および処理装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12827982 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14240984 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2012303366 Country of ref document: AU Date of ref document: 20120831 Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12827982 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: JP |