CN105073652A - Fresh water production process - Google Patents
Fresh water production process Download PDFInfo
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- CN105073652A CN105073652A CN201480017159.2A CN201480017159A CN105073652A CN 105073652 A CN105073652 A CN 105073652A CN 201480017159 A CN201480017159 A CN 201480017159A CN 105073652 A CN105073652 A CN 105073652A
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- 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
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- 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
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
- B01D2317/022—Reject series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
- B01D2317/025—Permeate series
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- 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
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- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- 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
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- 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
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- 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
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- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
Abstract
This fresh water production process comprises mixing a concentrated water obtained by treating a feed water in a first semipermeable membrane unit with another feed water having a solute concentration higher than that of the concentrated water and then treating the mixed water in a second semipermeable membrane unit, wherein: both an organic matters/microbes removal line in which the concentrated water is passed through an organic matters/microbes removal unit and then mixed with the another feed water, and a by-pass line in which the concentrated water is mixed with the another feed water without being passed through the removal unit are employed; and the flow volume of the concentrated water is controlled in accordance with the concentration(s) of organic substances and/or microbes in the concentrated water on the upstream side of the removal unit and/or a change in the pressure difference between the inflow side of the first semipermeable membrane unit and the non-permeation side thereof.
Description
Technical field
The present invention relates to for by multiple former water as seawater and river, trade effluent, sewage wastewater or its process the fresh water production method of the use semi-permeable membranes unit of the object of the combinations produce fresh water of water.
Background technology
Along with water environment degradation day by day serious in recent years, water technology is still important and utilize the technology of separatory membrane to obtain application widely.
Separatory membrane rough segmentation for water treatment is the microfiltration membrane realizing being separated with submicron order pore, the ultra-filtration membrane realizing being separated with more aperture, can realize the nanofiltration membrane that nano level is separated, with the reverse osmosis membrane that can realize Subnano-class and be separated.In these, there is the nanofiltration membrane of little pore, and reverse osmosis membrane be called as semi-permeable membranes and be classified as water can through and the impervious film of solute.Especially, as the technology that can be obtained the fresh water of water suitable for drinking by seawater or slightly salty, reverse osmosis membrane obtains to be applied especially widely.
Although use seawater to be energetically better than method of evaporating as former aquatic product fresh water by semi-permeable membranes, but due to the high osmotic pressure of seawater, this production and application high pressure method, thus make with use river as former aquatic product water purification method compared with need high energy.Be recently proposed a kind of system reducing osmotic pressure, comprise seawater and the salt concn water lower than seawater, such as the mixing of river, trade effluent or sewage wastewater is to dilute seawater, thus reduces cost of energy (see patent documentation 1).In addition, also there is the situation (see patent documentation 2-6) using the concentrated draining of being discharged by following technological process as dilution water: purifying treatment is carried out to trade effluent or sewage wastewater, reclaims with semi-permeable membranes and again utilize.
Usually, when carrying out semi-permeable membranes process to river, trade effluent or sewage wastewater, after by pre-treatment removing suspended substance, described water is fed semi-permeable membranes, but BOD (biological oxygen demand) composition, COD (chemical oxygen demand (COD)) composition and organic components such as polymerization polysaccharide and chlorophyll and microbe composition does not effectively remove by pre-treatment in many cases.Therefore, compared with use seawater, wherein to by with comprise the dilute seawater that the river of many organic components and microbe composition, trade effluent, sewage wastewater or its concentrated draining mix and obtain and carry out in the system of semi-permeable membranes process, a problem is that microorganism tends to breed on the surface at semi-permeable membranes, and the performance of semi-permeable membranes reduces owing to producing biological pollution.
In addition, as the organic components in the river of dilution water, trade effluent and sewage wastewater and microbe composition when this water is river, with rainfall and seasonal variation; When this water is sewage wastewater, band and seasonal variation in time; When this water is trade effluent, with the change such as turnout and production technique, thus make when seawater mixes with the dilution water collected during there is many organic components and microbe composition, the remarkable pollution of semi-permeable membranes becomes a problem.Especially, when the semi-permeable membranes concentrated solution from river, trade effluent and sewage wastewater is used as dilution water, organic components and microbe composition are concentrated and the pollution be separated into by dilute seawater through the semi-permeable membranes of thing and concentrated solution becomes even more serious, thus this situation is had problems.
In addition, at river, in the semi-permeable membranes process of trade effluent and sewage wastewater, breed on the surface at semi-permeable membranes to prevent microorganism, during operation interval or add sterilant (as described in non-patent literature 1 and 2) continuously, implement the flushing (as described in patent documentation 7) wherein regularly using water cleanses semi-permeable membranes surface, or implement when producing water wherein to clean the back scrubbing (as described in patent documentation 8) on semi-permeable membranes surface by allowing washing lotion to flow with the direction contrary with former water inflow direction, containing the pollutent of organic components and microbe composition from semi-permeable membranes sur-face peeling to semi-permeable membranes concentrated solution, and the pollution be separated into by dilute seawater through the semi-permeable membranes of thing and concentrated solution becomes more remarkable, thus make the problem that this situation becomes serious.
Background technology document
Patent documentation
Patent documentation 1:WO2011/114967
Patent documentation 2:JP-A-2010-207805
Patent documentation 3:JP-A-2012-16695
Patent documentation 4:JP-A-2012-16696
Patent documentation 5:JP-A-2010-149100
Patent documentation 6:JP-A-2010-149123
Patent documentation 7: Japanese Patent 4472050
Patent documentation 8:JP-A-2012-139614
Non-patent literature
Non-patent literature 1:TakuheiKimura etc., " InnovativeBiofoulingPreventiononSeawaterDesalinationReve rseOsmosisMembrane ", ProceedingsofIDAWorldCongress, BAH01-048 (2001).
Non-patent literature 2:KatariinaMajamaa etc., " FieldTrialtoOptimizetheUseofDBNPAinWRUApplication ", ProceedingsofIDAWorldCongress, DB09-076 (2009).
Invention summary
Problem to be solved by this invention
The object of the invention is effectively preventing semi-permeable membranes from polluting due to contained organism in for the river of dilute seawater, trade effluent, sewage wastewater or its treated water and/or microorganism for being used in the fresh water production method of semi-permeable membranes unit by the object of multiple former water as the combinations produce fresh water of seawater and river, trade effluent, sewage wastewater or its treated water.
The settling mode of problem
In order to solve the problem, the present invention has following integrant (1)-(16).
(1) a kind of method of producing fresh water, wherein in the first semi-permeable membranes unit to pending water A process to produce fresh water, the the first concentrated solution Ac produced during the process of the first semi-permeable membranes unit is mixed with the pending water B of solute concentration higher than the first concentrated solution Ac, and described mixing water is processed to produce fresh water in the second semi-permeable membranes unit
Described method comprises:
Organism/microorganism removing pipe, it allows the first concentrated solution Ac by organism/microorganism removing unit to reduce organic concentration or the microorganism concn of the first concentrated solution Ac, and it is mixed with pending water B; With
Bypass pipe, it allows the first concentrated solution Ac not mix with pending water B via organism/microorganism removing unit;
Wherein control according to the flow of at least one following aspect to the first concentrated solution Ac flowing into organism/microorganism removing unit: the organic concentration in the first concentrated solution Ac of organism/microorganism removing unit upstream side or microorganism concn; And first semi-permeable membranes unit inflow side and non-ly to change through the differential pressure between side, wherein said differential pressure calculating by deducting the pressure of the first concentrated solution Ac by the pressure for feedwater of the first semi-permeable membranes unit.
(2) according to the method for the production fresh water of (1), wherein when the first semi-permeable membranes unit inflow side and non-through the differential pressure between side change exceed preset value time, control according to the change of this differential pressure the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit; When the first semi-permeable membranes unit inflow side and non-through the differential pressure between side change be less than or equal to preset value time, control the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit according to the organic concentration in the first concentrated solution Ac or microorganism concn.
(3) according to the method for the production fresh water of (1) or (2), wherein in the first semi-permeable membranes unit to before pending water A process, to pending water A process in pretreatment unit.
(4) according to the method for the production fresh water of (3), the treatment process wherein forming organism/microorganism removing unit comprises at least one treatment process different from the treatment process of the pretreatment unit forming pending water A.
(5) according to the method for the production fresh water any one of (1)-(4), wherein provide the pressure by reducing the first concentrated solution Ac at organism/microorganism removing unit upstream side and produce the micro bubble generation unit of micro bubble, and produce micro bubble in the first concentrated solution Ac.
(6) according to the method for the production fresh water any one of (1)-(5), wherein organism/microorganism removing unit is for utilizing the hydraulic pressure of the first concentrated solution Ac to implement the pressure filtration unit be separated.
(7) according to the method for production fresh water any one of (1)-(6), wherein use filtering material that its material is identical with the filtering material of the second semi-permeable membranes unit as the filtering material of organism/microorganism removing unit.
(8) according to the method for the production fresh water any one of (1)-(7), wherein the treated draining from organism/microorganism removing unit is mixed with the concentrated solution from the second semi-permeable membranes unit, discharge from this system subsequently.
(9) produce a method for fresh water, wherein pending water A is mixed with the pending water B of solute concentration higher than pending water A, and mixing water is processed to produce fresh water in semi-permeable membranes unit;
Described method comprises:
Organism/microorganism removing pipe, it allows pending water A by organism/microorganism removing unit to reduce organic concentration or the microorganism concn of pending water A, and it is mixed with pending water B; With
Bypass pipe, it allows pending water A not mix with pending water B via organism/microorganism removing unit;
Wherein according to the organic concentration of the pending water A of organism/microorganism removing unit upstream side or microorganism concn, the flow to the pending water A flowing into organism/microorganism removing unit controls.
(10) according to the method for the production fresh water of (9), wherein before mixing with pending water B, to pending water A process in pretreatment unit.
(11) according to the method for the production fresh water of (10), the treatment process wherein forming organism/microorganism removing unit comprises at least one treatment process different from the treatment process of the pretreatment unit forming pending water A.
(12) according to the method for production fresh water any one of (9)-(11), wherein use filtering material that its material is identical with the filtering material of semi-permeable membranes unit as the filtering material of organism/microorganism removing unit.
(13) according to the method for the production fresh water any one of (9)-(12), wherein the treated draining from organism/microorganism removing unit is mixed with the concentrated solution from semi-permeable membranes unit, discharge from this system subsequently.
(14) according to the method for production fresh water any one of (1)-(13), wherein organic concentration or microorganism concn comprise at least one be selected from following group: total organic carbon concentration (TOC), can assimilate organic carbon (AOC), dissolved organic carbon concentration (DOC), chemical oxygen demand (COD) (COD), biological oxygen demand (BOD), ultraviolet absorptivity (UV), transparent exopolymer particle (TEP), Triphosaden (ATP), bacterial count and chlorophyll.
(15) according to the method for the production fresh water any one of (1)-(14), wherein organism/microorganism removing unit comprises at least one be selected from following group: flotation separation, precipitate and separate, oxidation pond method, sand filtration, micro-filtration, ultrafiltration, nanofiltration, flocculation treatment, oxide treatment and adsorption treatment.
(16) according to the method for the production fresh water any one of (1)-(15), wherein organism/microorganism removing unit is also used as the pretreatment unit of pending water B.
Advantage of the present invention
According to fresh water production device of the present invention, when by the combinations produce fresh water of multiple former water as seawater and river, trade effluent, sewage wastewater or its treated water, can prevent due to organism contained in river, trade effluent, sewage wastewater or its treated water and/or microorganism and cause the semi-permeable membranes for the treatment of mixing water to pollute.
Accompanying drawing is sketched
[Fig. 1] Fig. 1 is a schema, which show the example that the present invention produces an embodiment of fresh water method.
[Fig. 2] Fig. 2 is a schema, which show the example that the present invention produces another embodiment of fresh water method.
[Fig. 3] Fig. 3 is a schema, which show the example that the present invention produces the another embodiment of fresh water method.
[Fig. 4] Fig. 4 is a schema, which show the example that the present invention produces an embodiment again of fresh water method.
[Fig. 5] Fig. 5 is a schema, which show the example that the present invention produces an also embodiment of fresh water method.
[Fig. 6] Fig. 6 is a schema, which show the example that the present invention produces an embodiment again of fresh water method.
[Fig. 7] Fig. 7 is a schema, which show the example that the present invention produces an also embodiment of fresh water method.
[Fig. 8] Fig. 8 is a schema, which show the example that the present invention produces an embodiment again of fresh water method.
Embodiments of the present invention
Hereafter set forth embodiment of the present invention with reference to the accompanying drawings, but the present invention should not be construed as the following embodiment be limited to shown in accompanying drawing.
Fig. 1 is a schema, which show the example that the present invention produces an embodiment of fresh water method.Pending water A is stored in pending water A groove 1, and is fed in the first pretreatment unit 3 by pending water A supply pump 2 subsequently.After enforcement pre-treatment is as removing suspended substance, described water is temporarily stored in the first pre-treatment tank 4, and processes in the first semi-permeable membranes unit 6 by the first topping-up pump 5 subsequently.In the first semi-permeable membranes unit 6, the water through semi-permeable membranes process that pre-treatment by pending water A obtains is separated into through component (through thing) and non-through component (concentrated solution), and will through thing (being hereafter sometimes referred to as " first through thing Ap ") as freshwater storage first through in thing groove 7.On the other hand, the concentrated solution (hereinafter referred to as " the first concentrated solution Ac ") of discharging from the first semi-permeable membranes unit 6 is temporarily stored in has in the first concentrated liquid bath 9 of water quality sensor 8a.
In the method for production fresh water of the present invention, control the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit 12 according to the detected value of water quality sensor 8a.As the mode of the flow of control first concentrated solution Ac, the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b can be used as example.Control by regulating the opening and closing degree of the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b to flow through the flow of the first concentrated solution Ac of organism/microorganism removing unit 12 by the first concentrate pump 11 and flow through the flow of bypass pipe 13 of bypass organism/microorganism removing unit 12.The whole amount of the first concentrated solution Ac can flow through bypass pipe 13 or it can be allowed by organism/microorganism removing unit 12 and process wherein.In the present invention, the flow flowing into the first concentrated solution Ac of organism/microorganism removing unit 12 and bypass pipe 13 is according to the detected value of water quality sensor 8a and/or the inflow side of the first semi-permeable membranes unit 6 recorded by the pressure transmitter 21 hereinafter mentioned and non-ly control through the differential pressure between side changes.
The first concentrated solution Ac by organism/microorganism removing unit 12 and the first concentrated solution Ac by bypass pipe 13 merges in the downstream side of organism/microorganism removing unit 12, and is temporarily stored in the mixing tank 14 for mixing with pending water B.
By way of parenthesis, pending water B is stored in pending water B groove 15, and is fed in the second pretreatment unit 17 by pending water B supply pump 16 subsequently.After enforcement pre-treatment is as removing suspended substance, described water is fed in mixing tank 14.By the second topping-up pump 18 by the mixing water pressurization comprising the first concentrated solution Ac and pending water B in mixing tank 14, and then process in the second semi-permeable membranes unit 19, and second will be stored in through in thing groove 20 from the second semi-permeable membranes unit 19 through thing (being sometimes referred to as hereinafter " second through thing Bp ").By way of parenthesis, after suitably regulating pH, bright lattice rel index (langelier ' sindex), concentration of sterilant and mineral concentration as required, use first through in thing groove 7 through thing and second through in thing groove 20 through thing.
Produce the processing target in the method for fresh water as the present invention, pending water A and pending water B has no particular limits, as long as they are affecting difference in the solute concentration of osmotic pressure.Such as, seawater can be used and there is the concentrated seawater of high density, and concentration is lower than the river of concentration of seawater, underground water, sewage wastewater, trade effluent and treated water thereof.As treated water, example is filtered liquid and concentrated solution.As illustrated in fig. 1, when the first concentrated solution Ac will obtained by processing pending water A in semi-permeable membranes unit being used as dilution water, the concentrated draining of usually discharging from this system can being effectively utilized, thus make this situation effective.On the other hand, as as illustrated in Fig. 2 and Fig. 3, when will there is lower concentration and the pending water A (such as sewage wastewater) do not processed in semi-permeable membranes unit as when there is the dilution water of pending water B (such as seawater) of high density, under reduction capital investment, easily can produce dilute seawater, thus make this situation be preferred.About the concrete grammar of flow in control chart 2 and 3, in the example of figure 2, pending water A is processed in the first pretreatment unit 3, and based on the value of gained pretreated water that water quality sensor 8a detects, described water is fed in mixing tank 14 via organism/microorganism removing unit 12 and/or bypass pipe 13, and can mix with pending water B.In addition, in the example of fig. 3, water quality sensor 8c detects the water quality of pending water A, and based on the detected value of gained, described water is fed in mixing tank 14 via organism/microorganism removing unit 12 and/or bypass pipe 13, and can mix with pending water B.In both cases, according to be equipped with pending water A groove 1 water quality sensor 8a detected value or be equipped with the detected value of water quality sensor 8b of the first pre-treatment tank 4, controllable flow enters the flow of the pending water A of organism/microorganism removing unit or the pretreated water of pending water A.In figs. 2 and 3, symbol same as those of FIG. 1 and the explanation of mark is eliminated.
Pretreatment unit 3 can be arbitrarily, as long as it to process suspended substance and organic method.Such as, flotation separation, precipitate and separate, oxidation pond method, sand filtration, micro-filtration, ultrafiltration, nanofiltration, flocculation treatment, oxide treatment, adsorption treatment etc. can be mentioned, and can the multiple treatment process of series combination.
Semi-permeable membranes unit 6 can be selected from the nanofiltration membrane, reverse osmosis membrane etc. with little pore.
Organism/microorganism removing unit 12 can be arbitrarily, as long as it to reduce the treatment process as the organic components of target substance to be removed and microbe composition (comprising microorganism and metabolite thereof and by product).Such as, flotation separation, precipitate and separate, oxidation pond method, sand filtration, micro-filtration, ultrafiltration, nanofiltration, flocculation treatment, oxide treatment, adsorption treatment etc. can be mentioned.In organism/microorganism removing unit 12, can the multiple treatment process of series combination or can the multiple treatment process of parallel combination, and described treatment process can switch according to the detected value of water quality sensor 8a, 8b and 8c.
Treat that the target substance removed by organism/microorganism removing unit 12 comprises microorganism and metabolite thereof and by product, and as its organic concentration or microorganism concn, preferably measure the water quality index (WQI) be generally used in water treatment field.The measurement of organic concentration or microorganism concn has no particular limits, but with regard to organic concentration, be generally TOC (total organic carbon concentration), AOC (can organic carbon be assimilated), DOC (dissolved organic carbon concentration), COD (chemical oxygen demand (COD)), BOD (biological oxygen demand) etc.With regard to microorganism concn, TEP (transparent exopolymer particle), bacterial count, ATP (Triphosaden), chlorophyll etc. can be used.
Water quality sensor 8a, 8b or 8c can be arbitrarily, as long as it can measure above-mentioned organic concentration or microorganism concn.Water quality sensor 8a, 8b or 8c also can be the surveying instrument for manual measurement, or the surveying instrument of energy on-line measurement, but with regard to the angle of the change of water quality of the energy pending water A of instantaneous reply and the first concentrated solution Ac, water quality sensor 8a, 8b or 8c are preferably the surveying instrument for on-line measurement.
In addition, as the mode controlling the flow flowing into organism/microorganism removing unit 12, such as, the various valve of velocity of flow and three-way valve can be regulated to can be used as example.Such as, when water quality sensor 8a, 8b or 8c are TOC meter, the opening and closing degree of adjustable first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b, thus when the TOC of the first concentrated solution Ac is less than 5mg/l, improve the flow flowing into bypass pipe 13; And when its TOC is 5mg/l or larger, improve the flow flowing into organism/microorganism removing unit 12.In FIG, control the flow of the first concentrated solution Ac by regulating the opening and closing degree of the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b, but at use T-valve as under the first concentrated solution supply valve, changeable whole amount.
In addition, also focus on the biological pollutant produced in the first semi-permeable membranes unit 6 and can be used as pollutent containing organic components and microbe composition by semi-permeable membranes hyper-proliferative and/or the stress that caused by water temperature or change of water quality and peel off on the surface from this semi-permeable membranes on the surface, dispersible in the first concentrated solution Ac, and the second semi-permeable membranes unit 19 in downstream can be polluted.In addition, also pay close attention to described pollutent and peel off by adding sterilant or clean film surface, the deterioration of the first concentrated solution Ac water quality can be caused, and the second semi-permeable membranes unit 19 in downstream can be polluted.In this case, by removing (stripping) biological pollution material, reduced by the non-differential pressure through side of the first semi-permeable membranes unit 6 (circuit pressure loses, and it is not by calculating through the concentrated solution pressure (non-through wall pressure) of the first semi-permeable membranes unit 6 from deducting for feed pressure (supply side pressure) of the first semi-permeable membranes unit 6).That is, the change of water quality of the first concentrated solution Ac by the inflow side of the first semi-permeable membranes unit 6 and non-ly can be estimated through the differential pressure between side changes.Therefore, according to inflow side and the non-opening and closing degree regulating the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b through the differential pressure between side changes of the first semi-permeable membranes unit 6, controllable flow enters the flow of the first concentrated solution Ac of organism/microorganism removing unit 12 thus.
The inflow side of the first semi-permeable membranes unit 6 and non-through the differential pressure between side by arranging pressure transmitter 21 to detect first for the pressure of feed water Af pressure and the first concentrated solution Ac, thus show the non-differential pressure through side (circuit pressure loss) and measure, as shown in Figure 4.By way of parenthesis, produce in the method for fresh water using semi-permeable membranes, the inflow side of the first semi-permeable membranes unit and non-be the important parameter that monitoring bio pollutent forms degree through the differential pressure between side, and the inflow side of usually installing on the fresh water production device using semi-permeable membranes for monitoring semi-permeable membranes unit and the non-pressure transmitter through the differential pressure between side.Therefore, by according to the inflow side of the first semi-permeable membranes unit and the non-opening and closing degree controlling the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b through the differential pressure between side changes, the water quality sensor 8a for monitoring the first concentrated solution Ac change of water quality can be omitted, and can equipment cost be reduced, thus this situation is made to be preferred.
With regard to the first semi-permeable membranes unit 6 inflow side and non-to change through the differential pressure between side with regard to, such as when differential pressure reduces 10kPa or larger, namely, the microbial film on semi-permeable membranes surface is peeled off, the flow flowing into organism/microorganism removing unit 12 is preferably improved; And when differential pressure reduces 20kPa or larger, more preferably improve the flow flowing into organism/microorganism removing unit 12 further or allow the whole amount of the first concentrated solution Ac by organism/microorganism removing unit 12.In addition, such as in pending water sterilant being added into the first semi-permeable membranes unit 6, even when the first semi-permeable membranes unit 6 inflow side with non-through the differential pressure between side compared with non-add-on system when low reduction, the opening and closing degree of adjustable first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b, thus improve the flow flowing into organism/microorganism removing unit 12.
In the method for production fresh water of the present invention, the flow (as shown in Figure 1) of the first concentrated solution Ac flowing into organism/microorganism removing unit 12 can be controlled according to the detected value of water quality sensor 8a, can according to the inflow side of the first semi-permeable membranes unit 6 and the non-flow (wherein said differential pressure is by calculating first of semi-permeable membranes unit 6 for the Af pressure that feeds water deducts the pressure of the first concentrated solution Ac) (as shown in Figure 4) controlling the first concentrated solution Ac flowing into organism/microorganism removing unit 12 through the differential pressure between side changes, or can according to the inflow side of the detected value of water quality sensor 8a and the first semi-permeable membranes unit 6 and the non-flow (as shown in Figure 5) controlling the first concentrated solution Ac flowing into organism/microorganism removing unit 12 through the differential pressure between side changes.
In the method for the production fresh water shown in Fig. 5, the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit 12 can be controlled according to both detected values of water quality sensor and pressure transmitter.Water quality sensor 8a and pressure transmitter 21 can be used simultaneously.In this case, according to the inflow side of the first semi-permeable membranes unit detected on pressure transmitter 21 in optimal way and non-ly can control through the differential pressure between side changes the flow flowing into organism/microorganism removing unit.Such as, when differential pressure change is less than 10kPa, the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit can be controlled according to the detected value of water quality sensor 8a; When differential pressure is 10kPa or larger, the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit can be controlled according to the detected value of pressure transmitter.
By way of parenthesis, because the organism in the first concentrated solution Ac and microorganism also comprise organism and the microorganism of not fully removing in the first pretreatment unit 3, therefore organism/microorganism removing unit 12 preferably includes the treatment process that at least one is different from the first pretreatment unit 3.Such as, when the first pretreatment unit 3 be solid-liquid separation as sand filtration, micro-filtration or ultrafiltration, the organism do not removed by this solid-liquid separation and microorganism are decomposed by implementing oxide treatment (as ozonize) or biological treatment in organism/microorganism removing unit 12 and remove, or described organism and microorganism remove by interpolation flocculation agent or sorbent material.Such as, as shown in Figure 1, pump or sorbent material interpolation pump 23a is added by arranging flocculation agent groove or sorbent material groove 22a and flocculation agent at the upstream side of organism/microorganism removing unit 12, flocculation agent or sorbent material are added in the first concentrated solution Ac, thus described organism and microorganisms decompose remove.
In addition, with regard to reducing the angle of the equipment cost of organism/microorganism removing unit 12, preferably the second pretreatment unit 17 for the treatment of pending water B is also used as organism/microorganism removing unit, as shown in Figure 6.In figure 6, pending water A is stored in pending water A groove 1, and is then fed in the first pretreatment unit 3 by pending water A supply pump 2.After enforcement pre-treatment, described water is temporarily stored in the first pre-treatment tank 4, and processes in the first semi-permeable membranes unit 6 by the first topping-up pump 5 subsequently.In the first semi-permeable membranes unit 6, using described semi-permeable membranes through thing Ap as freshwater storage in the first fresh-water tank 7.On the other hand, the first concentrated solution Ac discharged from the first semi-permeable membranes unit 6 flows into be had the pipeline of water quality sensor 8.In the example of figure 7, first concentrated liquid bath and the first concentrate pump is not set, and pass through the pressure of the first concentrated solution Ac, regulate the opening and closing degree of the first concentrated solution supply valve 10a and the second concentrated solution supply valve 10b according to the detected value of water quality sensor 8, and described water is fed in the second pretreatment unit 17 or mixing tank 14 to mix with pending water B.Now, pump or sorbent material interpolation pump 23b is added by arranging flocculation agent groove or sorbent material groove 22b and flocculation agent at the upstream side of the second pretreatment unit 17, flocculation agent or sorbent material are added in the first concentrated solution Ac, thus organism and microorganisms decompose remove.In addition, pending water B is stored in pending water B groove 15, and is fed in the second pretreatment unit 17 by pending water B supply pump 16 subsequently.After pre-treatment together with above-mentioned first concentrated solution Ac at least partially, described mixing water is fed in mixing tank 14.After the mixing water comprising the first concentrated solution Ac and pending water B in mixing tank 14 being pressurizeed by the second topping-up pump 18, in the second semi-permeable membranes unit 19, described mixing water is processed, and second will be stored in through in thing groove 20 from the second semi-permeable membranes unit 19 through thing (second through thing Bp).
In the method for production fresh water of the present invention, described organism/microorganism removing unit is preferably a kind of processing unit, and it comprises at least one be selected from following group: flotation separation, precipitate and separate, oxidation pond method, sand filtration, micro-filtration, ultrafiltration, nanofiltration, flocculation treatment, oxide treatment and adsorption treatment.In these, when there is many light oil compositions and tensio-active agent, flotation separation is suitable; And under stress introduce micro bubble as microvesicle or receive bubble time, pressure flotation separation is effective.Micro bubble produces by being blown into pressurized air wherein, or by pressurized water fast decompression is produced.In addition, when guaranteeing large floor area, owing to reducing organism in the first concentrated solution Ac and microorganism with can having no power, therefore oxidation pond method is preferred, wherein implements aerobic treatment on top simultaneously, and implements anaerobic treatment in bottom.In oxidation pond method, preferably water is generally in the degree of depth in the retention basin of 1.2-2.5m and keeps about 5-30 days.
In sand filtration situation, gravity filter (it is the type that nature flows down) can be used, and adding pressure type also can be used to filter (being wherein filled in pressurized tank by sand).With regard to the sand for filling, the sand be made up of one-component can be used, but improve filtration efficiency by combination hard coal, silica sand, garnet and/or float stone etc.In addition, the first concentrated solution Ac can be allowed to pass through pervious bed, thus utilize the purification/decomposition function comprising the useful microorganism of anaerobic and aerobic of light compositing bacterium, yeast, milk-acid bacteria, thread fungus, actinomycetes etc. and the organic concentration or the microorganism concn that reduce the first concentrated solution Ac, and the water be accumulated in underground reservoir can be used as dilution water subsequently.
Microfiltration membrane and ultra-filtration membrane have no particular limits, and can use those with any shape suitably, the such as film of flat film, hollow-fibre membrane, tubular film or collapsed shape.The material of film also has no particular limits, and polyacrylonitrile, PPSU, polyphenylene sulfide sulfone, polyvinylidene difluoride (PVDF), polypropylene, polyethylene, polysulfones, tetrafluoroethylene, polyvinyl alcohol, rhodia, polymeric amide, polyester, polyimide, vinyl polymer and inorganic materials can be used as pottery.In addition, with regard to filter method, can use wherein to the pressure filtration method of pressurizeing for feedwater and filter and both the suction strainer methods wherein by filtering aspirating through side.In addition, pressure floatation also can be used to filter, it has combinationally used pressure floatation and sand filtration or immersion membrane filtration unit.Especially, when suction strainer method, also preferably use so-called flocculation membrane filtration or membrane bioreactor (MBR), wherein microfiltration membrane or ultra-filtration membrane are immersed in flocculation sediment groove or biological treating tank to implement to filter.
With regard to semi-permeable membranes as with regard to nanofiltration membrane and reverse osmosis membrane, polymer materials can be used as mould material, such as rhodia based polyalcohol, polymeric amide, polyester, polyimide and vinyl polymer.In addition, its membrane structure can be has tight zone and to have aperture inner or become the asymmetric membrane of large micropore gradually towards another surface towards this film by tight zone at least one surface of film, or has and formed and the composite membrane of the very thin functional layer formed by other materials on the tight zone of asymmetric membrane.But with regard to protecting the second semi-permeable membranes unit 19 in order to avoid component can easily be adsorbed to regard to the angle of semi-permeable membranes, the filtering material of organism/microorganism removing unit is preferably the material identical with the filtering material of the second semi-permeable membranes unit.
Forming the flocculation treatment of organism/microorganism removing unit is a kind ofly effectively be separated the process of solid-liquid by adding flocculation agent and the organism that flocculates in water with microorganism.In this case, the first concentrated solution Ac carrying out flocculation treatment by after the sedimentation using swash plate etc., implement sand filtration or implement micro-filtration or ultrafiltration and change into allow by the second semi-permeable membranes unit for feedwater.Flocculation agent is roughly divided into inorganic flocculating agent and organic polvmer flocculant, and the example of inorganic flocculating agent comprises Al-based goagulants as Tai-Ace S 150 (vitriol band) and polymerize aluminum chloride (PACl), and iron-based flocculation agent is as iron(ic) chloride and bodied ferric sulfate.In addition, the example of organic polymer flocculation agent comprises cationic polymer flocculent as (methyl) acrylate quaternary salt (being total to) polymkeric substance, Anionic polymer flocculants is as acrylamide/sodium Acrylate multipolymer, and Non-ionic polymer flocculants is as polyacrylamide.These flocculation agents can be used alone, or can be used as flocculant aid and inorganic flocculating agent combinationally uses.In addition, due to use organic polvmer flocculant but not inorganic flocculating agent time, can suppress the generation of mud, therefore preferably combination uses inorganic flocculating agent and organic polvmer flocculant, instead of is used alone inorganic flocculating agent.In addition, in flocculation, because effect is with the pH noticeable change of pending water, therefore preferably use alkali as sodium hydroxide, lime or sodium bicarbonate, or sour example hydrochloric acid or sulfuric acid by pH regulator to suitable scope.
As oxide treatment, can mention that biological treatment, ozone and ultraviolet or gamma-radiation irradiate, add fluorine or hydrogen peroxide, catalytic treatment etc., and also can use and wherein combinationally use its accelerated oxidation process of at least two kinds.Consider the impact on environment, preferred ozone or uviolizing, interpolation hydrogen peroxide and catalytic treatment.As catalyzer, the catalyzer (it can improve oxidation capacity when combining with ozone or hydrogen peroxide) of iron, copper and manganese can being mentioned, there is the metal oxide of so-called photo-catalysis function, such as titanium dioxide etc.Accelerated oxidation process is called AOP (=advanced oxidization method), and it a kind of produce in water have the hydroxyl radical free radical of high oxidative capacity with the method for decomposing organic matter by combinationally using ozone, ultraviolet, hydrogen peroxide, catalyzer (photocatalyst etc.) etc.In addition, the feature of accelerated oxidation process is do not produce secondary waste thing outside organic matter removal decomposition and can obtain the treatment effects such as deodorizing, decolouring, sterilization.As the combination of accelerated oxidation process, preferably can produce remarkable more than the combination contributing to the hydroxyl radical free radical of oxygenolysis, and the combination of more preferably hydrogen peroxide and ultraviolet combination, ozone and hydrogen peroxide, or ozone and ultraviolet combination.When combining ozone, ultraviolet and hydrogen peroxide these three kinds, more effectively can implement oxygenolysis, thus making this situation be preferred.
Adsorption treatment is a kind of process wherein having relatively little organism that is hundreds of or more small-molecular-weight and be adsorbed in water on solid surface by adding sorbent material.As sorbent material, gac, ion exchange resin, zeolite etc. can be mentioned, with regard to relatively tractable angle, preferably use powdered active carbon.When sorbent material has particle shape, can be designed to be filled in post and to allow water by this post.When sorbent material has powder shape, suitably by with solid-liquid separation as precipitate and separate or membrane filtration combine under be added directly in the first concentrated solution Ac and use this sorbent material.In addition, can use and be coated with the adsorbent filter of sorbent material as gac or ion exchange resin.
By way of parenthesis, when low salt concn water is as river, trade effluent or sewage wastewater, as semi-permeable membranes unit 6, use semi-permeable membranes as reverse osmosis membrane (to low pressure) or nanofiltration membrane.But, due to Hyposmolality, high-recovery can be realized and run, and therefore the amount of the first concentrated solution Ac is minimized.Therefore, energy recovery unit is installed in the downstream side of even discharging concentrated solution at semi-permeable membranes unit, and callable little energy and the cost-performance of energy recovery unit reduce, thus make this installation be uneconomic in many cases.Therefore, for the treatment of in the semi-permeable membranes unit 6 of low salt concn water, usually water is discharged from this system and not recovered energy.Therefore, as as illustrated in Fig. 7, when as reducing the organic concentration of the first concentrated solution Ac or the organism/microorganism removing unit of microorganism concn, when the pressure filtration unit 12a that can implement to filter under concentrated solution pressure is directly connected with the first semi-permeable membranes unit 6, can at unpowered lower reduction organic concentration or microorganism concn, thus this situation be made to be preferred.With regard to pressure filtration unit 12a, core strainer, disc filter, micro-filtration, ultrafiltration, sand filtration, bio-carrier filtration, nanofiltration, sand filtration, precoat filter can be used, be coated with the absorbent filtering etc. of gac or ion exchange resin.
In addition, when carrying out semi-permeable membranes process to low salt concn water as river, trade effluent or sewage wastewater, the first concentrated solution Ac keeps the concentrated solution pressure of about 0.8-1.5MPa.Therefore, preferably provide the pressure that can reduce the first concentrated solution Ac fast to produce the micro bubble generation unit 24 of micro bubble in the first concentrated solution Ac.When organism/microorganism removing unit be pressure floatation be separated or biological treatment, by producing micro bubble by micro bubble generation unit 24 in the concentrated solution of the first semi-permeable membranes unit 6, can reduce for generation of the required energy of the gas blower, compressor etc. of micro bubble, and therefore this situation is preferred.In addition, when organism/microorganism removing unit is the film separation unit adopting cross-flow method, can realize being separated into through thing and concentrated solution, simultaneously with micro bubble cleaning film surface, and therefore this situation is preferred.As the micro bubble generation unit 24 of pressure that can reduce the first concentrated solution Ac fast, such as vent fan etc. can be used as example.Position set by micro bubble generation unit 24 can be any position, as long as it is for execute stressed pipeline to concentrated solution.But, as illustrated in Fig. 7, when the first concentrated solution Ac utilizes its concentrated solution pressure to be separated in organism/microorganism removing unit (pressure filtration unit 12a), must micro bubble be produced, keep simultaneously and be separated required energy balance.
In the present invention, due to will the physical cleaning draining of many organism and microorganism be comprised and adopt the concentrated draining of the film separation unit of cross-flow method to discharge (as illustrated in Fig. 8) from organism/microorganism removing unit, when the concentrated draining 25 of treated draining as cleaned draining and pressure filtration unit 12a is mixed with the concentrated solution Bc of the second semi-permeable membranes unit 19 and discharges from this system via water shoot 26 subsequently, the cleaning draining comprising many organism and microorganism from organism/microorganism removing unit and concentrated draining can be diluted, and also can dilute the concentrated solution Bc of the second semi-permeable membranes unit 19 with high density, thus make the present invention environmentally friendly and be preferred.
Although describe the present invention in detail with reference to its specific embodiments, but those skilled in the art know and can carry out various change and change to it not departing under the spirit and scope of the invention.The Japanese patent application 2013-059548 that the application submitted to based on March 22nd, 2013, and its content is incorporated to by reference at this.
Industrial applicibility
The invention provides a kind of method using semi-permeable membranes cellular manufacture fresh water, and a kind of fresh water side working system, thus by the combinations produce fresh water of multiple former water as seawater and river, underground water or treated sewage wastewater, more specifically, provide a kind of method of producing fresh water, it effectively prevent semi-permeable membranes and pollutes due to organism contained in concentrated draining or microorganism.
Reference numeral and denotational description
1: pending water A groove
2: pending water A supply pump
3: the first pretreatment units
4: the first pre-treatment tanks
5: the first topping-up pumps
6: the first semi-permeable membranes unit
7: the first through thing groove
8,8a, 8b, 8c: water quality sensor
9: the first concentrated liquid baths
10a: the first concentrated solution supply valve
10b: the second concentrated solution supply valve
11: the first concentrate pumps
12: organism/microorganism removing unit
12a: pressure filtration unit
13: bypass pipe
14: mixing tank
15: pending water B groove
16: pending water B supply pump
17: the second pretreatment units
18: the second topping-up pumps
19: the second semi-permeable membranes unit
20: the second through thing groove
21: pressure transmitter
22a, 22b: flocculation agent groove or sorbent material groove
23a, 23b: flocculation agent adds pump or sorbent material adds pump
24: micro bubble generation unit
25: organism/microorganism removing unit cleaning water shoot or concentrated water shoot
26: water shoot
Claims (16)
1. produce the method for fresh water for one kind, wherein in the first semi-permeable membranes unit to pending water A process to produce fresh water, the the first concentrated solution Ac produced during the process of the first semi-permeable membranes unit is mixed with the pending water B of solute concentration higher than the first concentrated solution Ac, and mixing water is processed to produce fresh water in the second semi-permeable membranes unit
Described method comprises:
Organism/microorganism removing pipe, it allows the first concentrated solution Ac by organism/microorganism removing unit to reduce organic concentration or the microorganism concn of the first concentrated solution Ac, and it is mixed with pending water B; With
Bypass pipe, it allows the first concentrated solution Ac not mix with pending water B via organism/microorganism removing unit;
Wherein according to the inflow side of the organic concentration in the first concentrated solution Ac of organism/microorganism removing unit upstream side or microorganism concn and the first semi-permeable membranes unit and non-change through the differential pressure between side at least one the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit is controlled, wherein said differential pressure calculating by deducting the pressure of the first concentrated solution Ac by the pressure for feedwater of the first semi-permeable membranes unit.
2. the method for production fresh water according to claim 1, wherein when the first semi-permeable membranes unit inflow side and non-through the differential pressure between side change exceed preset value time, control according to the change of this differential pressure the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit; When the first semi-permeable membranes unit inflow side and non-through the differential pressure between side change be less than or equal to preset value time, control the flow of the first concentrated solution Ac flowing into organism/microorganism removing unit according to the organic concentration in the first concentrated solution Ac or microorganism concn.
3. according to the method for the production fresh water of claim 1 or 2, wherein in the first semi-permeable membranes unit to before pending water A process, to pending water A process in pretreatment unit.
4. the method for production fresh water according to claim 3, the treatment process wherein forming organism/microorganism removing unit comprises at least one treatment process different from the treatment process of the pretreatment unit forming pending water A.
5. the method for production fresh water as claimed in one of claims 1-4, wherein provide the pressure by reducing the first concentrated solution Ac at organism/microorganism removing unit upstream side and produce the micro bubble generation unit of micro bubble, and produce micro bubble in the first concentrated solution Ac.
6. the method for production fresh water as claimed in one of claims 1-5, wherein organism/microorganism removing unit is for utilizing the hydraulic pressure of the first concentrated solution Ac to implement the pressure filtration unit be separated.
7. the method for production fresh water as claimed in one of claims 1-6, wherein uses filtering material that its material is identical with the filtering material of the second semi-permeable membranes unit as the filtering material of organism/microorganism removing unit.
8. the method for production fresh water as claimed in one of claims 1-7, wherein mixes the treated draining from organism/microorganism removing unit with the concentrated solution from the second semi-permeable membranes unit, discharges subsequently from this system.
9. produce a method for fresh water, wherein pending water A is mixed with the pending water B of solute concentration higher than pending water A, and mixing water is processed to produce fresh water in semi-permeable membranes unit;
Described method comprises:
Organism/microorganism removing pipe, it allows pending water A by organism/microorganism removing unit to reduce organic concentration or the microorganism concn of pending water A, and it is mixed with pending water B; With
Bypass pipe, it allows pending water A not mix with pending water B via organism/microorganism removing unit;
Wherein according to the organic concentration of the pending water A of organism/microorganism removing unit upstream side or microorganism concn, the flow to the pending water A flowing into organism/microorganism removing unit controls.
10. the method for production fresh water according to claim 9, wherein before mixing with pending water B, to pending water A process in pretreatment unit.
The method of 11. production fresh water according to claim 10, the treatment process wherein forming organism/microorganism removing unit comprises at least one treatment process different from the treatment process of the pretreatment unit forming pending water A.
The method of 12. production fresh water any one of claim 9-11, wherein uses filtering material that its material is identical with the filtering material of semi-permeable membranes unit as the filtering material of organism/microorganism removing unit.
The method of 13. production fresh water any one of claim 9-12, wherein mixes the treated draining from organism/microorganism removing unit with the concentrated solution from semi-permeable membranes unit, discharges subsequently from this system.
The method of 14. production fresh water any one of claim 1-13, wherein organic concentration or microorganism concn comprise at least one be selected from following group: total organic carbon concentration (TOC), can assimilate organic carbon (AOC), dissolved organic carbon concentration (DOC), chemical oxygen demand (COD) (COD), biological oxygen demand (BOD), ultraviolet absorptivity (UV), transparent exopolymer particle (TEP), Triphosaden (ATP), bacterial count and chlorophyll.
The method of 15. production fresh water any one of claim 1-14, wherein organism/microorganism removing unit comprises at least one be selected from following group: flotation separation, precipitate and separate, oxidation pond method, sand filtration, micro-filtration, ultrafiltration, nanofiltration, flocculation treatment, oxide treatment and adsorption treatment.
The method of 16. production fresh water any one of claim 1-15, wherein organism/microorganism removing unit is also used as the pretreatment unit of pending water B.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-059548 | 2013-03-22 | ||
| JP2013059548 | 2013-03-22 | ||
| PCT/JP2014/057615 WO2014148580A1 (en) | 2013-03-22 | 2014-03-19 | Fresh water production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105073652A true CN105073652A (en) | 2015-11-18 |
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| CN201480017159.2A Pending CN105073652A (en) | 2013-03-22 | 2014-03-19 | Fresh water production process |
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| JP (1) | JP6194887B2 (en) |
| CN (1) | CN105073652A (en) |
| SG (1) | SG11201507830XA (en) |
| WO (1) | WO2014148580A1 (en) |
| ZA (1) | ZA201507065B (en) |
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| CN114057356A (en) * | 2021-11-19 | 2022-02-18 | 福建省环境保护设计院有限公司 | Device for treating industrial wastewater by biotechnology and membrane technology and treatment method thereof |
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| KR102098009B1 (en) * | 2018-02-13 | 2020-04-07 | 한국산업기술시험원 | Reverse osmosis membrane water treatment system utilizing concentrated water |
| JP2020146670A (en) * | 2019-03-15 | 2020-09-17 | 栗田工業株式会社 | Wastewater treatment apparatus |
| JP2021045736A (en) * | 2019-09-11 | 2021-03-25 | 東洋紡株式会社 | Concentration system |
| WO2021049621A1 (en) * | 2019-09-11 | 2021-03-18 | 東洋紡株式会社 | Concentration system |
| JP7342901B2 (en) * | 2021-02-26 | 2023-09-12 | 横河電機株式会社 | Water treatment methods, control devices, and water treatment systems |
| CN114349203A (en) * | 2021-12-02 | 2022-04-15 | 康沃胜鑫(广州)技术有限公司 | Micro-nano rotational flow direct water dispenser |
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- 2014-03-19 JP JP2014530045A patent/JP6194887B2/en not_active Expired - Fee Related
- 2014-03-19 SG SG11201507830XA patent/SG11201507830XA/en unknown
- 2014-03-19 WO PCT/JP2014/057615 patent/WO2014148580A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
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| SG11201507830XA (en) | 2015-10-29 |
| JP6194887B2 (en) | 2017-09-13 |
| JPWO2014148580A1 (en) | 2017-02-16 |
| WO2014148580A1 (en) | 2014-09-25 |
| ZA201507065B (en) | 2016-12-21 |
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Application publication date: 20151118 |