WO2019229866A1 - 膜洗浄装置及び膜洗浄方法 - Google Patents
膜洗浄装置及び膜洗浄方法 Download PDFInfo
- Publication number
- WO2019229866A1 WO2019229866A1 PCT/JP2018/020677 JP2018020677W WO2019229866A1 WO 2019229866 A1 WO2019229866 A1 WO 2019229866A1 JP 2018020677 W JP2018020677 W JP 2018020677W WO 2019229866 A1 WO2019229866 A1 WO 2019229866A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- ozone
- dissolved
- concentration
- threshold value
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/12—Use of permeate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/40—Automatic control of cleaning processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/44—Specific cleaning apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- 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
- C02F2209/23—O3
-
- 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
- C02F2303/16—Regeneration of sorbents, filters
-
- 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
-
- 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 application relates to a membrane cleaning apparatus and a membrane cleaning method for cleaning a separation membrane for filtering water to be treated with ozone water.
- MBR Membrane-separated activated sludge that decomposes organic matter in treated water with activated sludge containing microorganisms and performs solid-liquid separation by filtration using a separation membrane as a method of treating wastewater containing organic matter (hereinafter, treated water)
- the method (Membrane Bio Reactor: hereinafter referred to as MBR) is known. Since MBR separation membranes are clogged due to adherence of contaminants to the surface or pores with continuous use, the filtration performance gradually decreases. For this reason, a membrane cleaning apparatus for cleaning the separation membrane with ozone water is attached to the membrane separation tank for performing the filtration treatment.
- Patent Document 1 discloses a method for generating ozone water by supplying ozone gas to water to be dissolved to which an acid is added as a method for cleaning an MBR separation membrane.
- Ozone water causes autolysis under alkaline conditions, but is relatively stable under acidic conditions. By setting the water to be dissolved to pH 5 or less in advance, ozone water can be generated with a smaller amount of supplied ozone.
- an oxidation treatment process Has an alkaline oxidation treatment step for oxidation treatment under alkaline conditions and an acidic oxidation treatment step for oxidation treatment under acidic to neutral conditions.
- the alkaline oxidation treatment step by first performing the alkaline oxidation treatment step, the oxidation treatment efficiency of the organic matter by ozone is increased, and the organic matter in the water to be dissolved can be decomposed and reduced in molecular weight.
- the acidic oxidation treatment step ozone water can be generated with a smaller amount of supplied ozone.
- the present application discloses a technique for solving the above-described problems, and efficiently generates ozone water used for film cleaning, and can reduce the cost required for ozone water generation. It is another object of the present invention to provide a film cleaning method.
- the membrane cleaning device disclosed in the present application is a membrane cleaning device for cleaning a separation membrane that performs filtration treatment on water to be treated with ozone water, storing treated water that has been filtered by the separation membrane as dissolved water, Ozone water generating unit for generating ozone water by dissolving ozone gas in the water to be dissolved, ozone gas supply means for supplying ozone gas to the ozone water generating unit, and stored in the ozone water generating unit based on the organic substance concentration of the water to be dissolved PH adjusting means for adjusting the pH of the water to be dissolved.
- the membrane cleaning method disclosed in the present application is a membrane cleaning method in which a separation membrane that performs filtration treatment on water to be treated is washed with ozone water, and the treated water filtered by the separation membrane is used as dissolved water.
- An ozone water generating step of dissolving ozone gas in dissolved water to generate ozone water comprising: a first step of dissolving ozone gas in water to be dissolved under neutral or alkaline conditions; And a second step of dissolving ozone gas in the water to be dissolved under acidic conditions, and judging the transition from the first step to the second step based on the organic matter concentration of the water to be dissolved,
- the start of ozone water feeding to the separation membrane is determined based on the dissolved ozone concentration.
- the pH adjusting means for adjusting the pH of the water to be dissolved is provided based on the organic matter concentration of the water to be dissolved, the organic substance in the water to be dissolved is measured from the measured value of the organic substance concentration. Estimate the processing time required for decomposition, generate ozone water under pH conditions suitable for organic matter decomposition, and adjust pH so that the pH conditions are suitable for increasing the dissolved ozone concentration thereafter. can do. Therefore, it is possible to efficiently generate ozone water regardless of fluctuations in the organic matter concentration of the water to be dissolved, and it is possible to reduce the cost required for generating ozone water.
- the processing time of the first step is optimized without excess or shortage by judging the transition from the first step to the second step based on the organic matter concentration of the water to be dissolved. If the organic matter concentration of the water to be dissolved is low, the processing time of the first step can be shortened. Further, by determining the start of ozone water feeding to the separation membrane based on the dissolved ozone concentration of the water to be dissolved, the processing time of the second step can be optimized without excess or deficiency. Therefore, it is possible to efficiently generate ozone water regardless of fluctuations in the organic matter concentration of the water to be dissolved, and it is possible to reduce the cost required for generating ozone water.
- FIG. 1 It is a figure which shows the whole structure of the film
- FIG. It is a figure which shows the structure of the process transfer judgment means of the film
- FIG. It is a figure which shows the structure of the pH adjustment means of the film
- FIG. It is a figure which shows the structure of the water supply start judgment means of the film
- FIG. It is a figure which shows the example of the connection part of the ozone water supply piping and filtrate water piping in the membrane cleaning apparatus by Embodiment 1.
- FIG. 6 is a diagram illustrating a film cleaning start procedure in the film cleaning apparatus according to the first embodiment. It is a figure which shows the whole structure of the film
- FIG. It is a figure which shows the structure of the process transfer judgment means of the film
- FIG. It is a figure explaining the film
- FIG. It is a figure which shows the whole structure of the film
- FIG. 10 is a diagram for explaining a film cleaning start procedure in the film cleaning apparatus according to the third embodiment.
- FIG. 3 is a hardware configuration diagram that realizes part of the functions of a process transition determination unit, a pH adjustment unit, or a water supply start determination unit of the membrane cleaning apparatus according to the first embodiment.
- FIG. 1 shows the overall configuration of the film cleaning apparatus according to the first embodiment.
- FIG. 3 and FIG. 4 show the configurations of the process transition judging means, pH adjusting means, and water supply start judging means of the membrane cleaning apparatus according to Embodiment 1, respectively.
- the same and corresponding parts are denoted by the same reference numerals.
- the membrane cleaning apparatus cleans the separation membrane 2 that separates the water to be treated W1 including activated sludge into activated sludge and treated water W2.
- a membrane cleaning device for cleaning the MBR separation membrane 2 will be described.
- the membrane to be cleaned by the membrane cleaning device according to the present application is not limited to the MBR separation membrane 2, and is not limited to the treated water W1. May not contain activated sludge.
- inflow water W flowing from an aeration tank (not shown) that performs biological treatment with activated sludge is stored as treated water W1.
- the separation membrane 2 is disposed in the membrane separation tank 1 and is immersed in the water to be treated W1.
- the treated water W1 contains activated sludge and is separated into activated sludge and treated water W2 by the filtration treatment by the separation membrane 2.
- the separation membrane 2 needs to be cleaned with a membrane cleaning device because contaminants adhere to the surface or pores with continuous use and clogging occurs.
- the separation membrane 2 is connected to the filtrate pipe 3a and the filtration pump 4, and the treated water W2 filtered by the separation membrane 2 is sucked by the filtration pump 4 and circulates through the filtrate water pipe 3a. It is stored in.
- the material of the membrane separation tank 1 and the treated water tank 5 is not particularly limited, and for example, concrete, stainless steel, resin, or the like is used.
- the separation membrane 2 can be of a reverse osmosis membrane (RO membrane), nanofiltration membrane (NF membrane), ultrafiltration membrane (UF membrane), and microfiltration membrane (MF membrane). , Are appropriately selected from them.
- a fluorine-based resin compound such as polytetrafluoroethylene resin (PTFE) or polyvinylidene fluoride resin (PVDF) is preferable because of its excellent resistance to ozone water.
- the separation membrane 2 may be either a hollow fiber membrane or a flat membrane.
- the treated water W2 stored in the treated water tank 5 is discharged out of the system by the treated water discharge pipe 3b, but a part of the treated water W2 flows through the dissolved water pipe 3c and enters the ozone water generation unit 6 as the dissolved water W3.
- a pump and a valve may be appropriately installed in the treated water discharge pipe 3b and the dissolved water pipe 3c.
- the ozone water generation unit 6 uses the treated water W2 as the water to be dissolved W3, and performs an ozone water generation step of generating ozone water W4 by dissolving ozone gas in the water to be dissolved W3.
- the ozone water generation step includes a first step of dissolving ozone gas in the water to be dissolved W3 under neutral or alkaline conditions, a second step of dissolving ozone gas in the water to be dissolved W3 under acidic conditions after the first step, and have.
- the dissolved water W3 stored in the ozone water generating unit 6 has a dissolved ozone concentration increased by the ozone water generating step, and becomes ozone water W4 having a predetermined dissolved ozone concentration.
- ozone water W4 the dissolved water W3 that has reached a predetermined dissolved ozone concentration that can be used for film cleaning.
- the material for the ozone water generating unit 6 for example, stainless steel or a fluorine resin compound is preferable because of its excellent resistance to ozone. Further, the surface of the container of the ozone water generation unit 6 may be coated with a fluorine resin compound.
- the ozone water generator 6 is connected to an ozonizer 61 that is an ozone gas supply means via an ozone gas pipe 3d.
- the ozonizer 61 generates ozone gas using oxygen generated by the pressure swing adsorption method (PSA method) or the vacuum pressure swing adsorption method (PVSA method) or liquid oxygen as a raw material, and supplies the ozone gas to the ozone water generation unit 6.
- the ozone gas generated by the ozonizer 61 flows to the ozone water generation unit 6 through the ozone gas pipe 3d.
- ozone gas can be dissolved in the water to be dissolved W ⁇ b> 3 by, for example, an ejector method, a diffuser method, and a dissolved film method.
- the ozone water generation unit 6 is connected to the exhaust ozone gas decomposition unit 62 through the exhaust ozone gas pipe 3e.
- the exhaust ozone gas decomposition unit 62 is filled with a catalyst such as activated carbon or manganese oxide for decomposing ozone gas into oxygen. Exhaust ozone gas discharged from the ozone water generation unit 6 contacts the catalyst in the exhaust ozone gas decomposition unit 62, is decomposed into oxygen, and is discharged outside the system.
- Process transition judgment means 7 judges the transition from the first process to the second process based on the organic substance concentration of the water to be dissolved W3.
- the pH adjusting means 8 adjusts the pH of the water to be dissolved W3 stored in the ozone water generator 6 based on the organic substance concentration of the water to be dissolved W3.
- the water supply start determination means 10 determines the start of ozone water supply to the separation membrane 2 based on the dissolved ozone concentration of the water to be dissolved W3.
- the ozone water supply unit 11 includes an electromagnetic or pneumatic automatic valve, a pump, and the like.
- the ozone water supply unit 11 separates the ozone water W4 generated by the ozone water generation unit 6 based on the determination result by the water supply start determination unit 10. Send water to 2.
- the ozone water W4 supplied by the ozone water supply unit 11 flows to the separation membrane 2 through the ozone water supply piping 3g and the filtrate water piping 3a, and cleans the separation membrane 2. That is, the membrane cleaning with the ozone water W4 is a back-flow cleaning in which the ozone water W4 flows through the separation membrane 2 in the direction opposite to the direction in which the water to be treated W1 is filtered.
- the ozone water generating step in the ozone water generating unit 6 includes the first step of dissolving ozone gas in the water to be dissolved W3 under neutral or alkaline conditions, and dissolving ozone gas in the water to be dissolved W3 under acidic conditions. And a second step.
- the processing time of the first process is determined by the process transition determining means 7, and the processing time of the second process is determined by the water supply start determining means 10.
- Ozone self-decomposition rate is faster as the pH is higher, and hydroxyl radicals generated in the process of ozone self-decomposition have higher oxidizing power than ozone. For this reason, in the first step of dissolving ozone gas in the water to be dissolved W3 under neutral or alkaline conditions, the oxidation efficiency of the organic substance by dissolved ozone is increased, and the decomposition of the organic substance in the water to be dissolved W3 can be promoted. .
- the pH set value in the first step is preferably in the range of pH 7 to pH 10.
- the pH is less than 7, the self-decomposition of ozone is suppressed and the decomposition of organic matter cannot be promoted.
- the pH is greater than 10
- both the amount of alkali added to the water to be dissolved W3 and the amount of acid added to the water to be dissolved W3 when moving to the second step are both required.
- a large amount of ionic components flow into the membrane separation tank 1 when performing membrane cleaning, and this affects the treatment of the water to be treated W1, which is not preferable.
- the self-decomposition rate of ozone is suppressed as the pH decreases.
- disassembly of ozone can be suppressed and dissolved ozone concentration can be raised.
- the pH set value in the second step is preferably in the range of pH 2 to pH 6. At pH 2, the self-decomposition of ozone is substantially suppressed.
- the organic substance concentration of the treated water W2 varies depending on the operating conditions of the MBR such as the sludge residence time (SRT) of the membrane separator and the dissolved oxygen concentration of the treated water W1. Therefore, in the membrane cleaning apparatus that uses the treated water W2 as the water to be dissolved W3, the amount of ozone gas required to decompose the organic matter in the water to be dissolved W3 varies depending on the operating conditions of the MBR. Further, when a constant amount of ozone gas is supplied to the ozone water generation unit 6 by the ozonizer 61, the processing time of the first step necessary for decomposing the organic matter in the water to be dissolved W3 varies depending on the operating conditions of the MBR. .
- the process transition judging means 7 estimates the processing time of the first process necessary for decomposing the organic matter in the dissolved water W3 based on the organic substance concentration of the dissolved water W3, and shifts to the second process. By determining the above, it is possible to optimize the processing time of the first process without excess or deficiency.
- concentration also fluctuate.
- the predetermined dissolved ozone concentration is a dissolved ozone concentration capable of cleaning contaminants adhering to the separation membrane 2, and is specifically set in a range of 5 mg / L to 80 mg / L.
- the start time of the ozone water supply to the separation membrane 2 is determined based on the dissolved ozone concentration of the dissolved water W3, thereby optimizing the processing time of the second step without excess or deficiency. be able to.
- the process transition determination unit 7 includes an organic substance sensor 71, a memory (second memory) 72, and a comparison unit (second comparison unit) 73.
- the organic substance sensor 71 and the comparison unit 73, the memory 72 and the comparison unit 73, the comparison unit 73, and the pH adjusting unit 8 are connected by a signal line 9c, a signal line 9d, and a signal line 9a, respectively.
- the organic substance sensor 71 continuously or periodically measures the organic substance concentration of the dissolved water W3 stored in the ozone water generation unit 6 in the ozone water generation process (particularly the first process).
- the organic substance concentration can be measured using the absorbance of UV 254 nm (UV254), total organic carbon (TOC), fluorescence intensity, etc., which are organic substance indicators.
- the memory 72 stores a threshold value of the organic substance concentration that shifts from the first process to the second process.
- the comparison unit 73 acquires the measurement value obtained by the organic sensor 71 through the signal line 9c, and acquires the threshold value stored in the memory 72 through the signal line 9d. Furthermore, the comparison unit 73 compares the measurement value obtained by the organic substance sensor 71 with a threshold value, and the pH value is set so that the ozone water generation unit 6 moves from the first step to the second step when the measurement value is equal to or less than the threshold value.
- the adjusting means 8 is controlled. Specifically, the comparison unit 73 sends a process transition signal to the pH adjusting unit 8 via the signal line 9a when the measured value by the organic sensor 71 becomes equal to or less than the threshold value.
- the threshold value of the organic substance concentration is calculated using the following equation 1 that calculates the ozone water generation time including the first step and the second step, using the organic substance concentration and the threshold value of the dissolved ozone concentration at which cleaning is started as parameters. Can do.
- the organic substance concentration that minimizes the ozone water generation time calculated using Equation 1 can be used as the organic substance concentration threshold value that shifts from the first step to the second step.
- [Ozone water generation time] f (organic substance concentration, threshold of dissolved ozone concentration at which cleaning is started) (1)
- the pH adjusting means 8 includes a pH sensor 81, a memory (fifth memory) 82, a pH adjustment control unit 83, and a pH adjustment unit 84, as shown in FIG.
- the pH sensor 81 and the pH adjustment control unit 83, the memory 82 and the pH adjustment control unit 83, the pH adjustment control unit 83 and the pH adjustment unit 84, and the pH adjustment control unit 83 and the process transition judging means 7 are respectively connected to the signal lines 9e and 9f. , 9g, 9a.
- the pH adjuster 84 and the ozone water generator 6 are connected via an acid-alkali supply pipe 3f.
- the pH sensor 81 continuously measures the pH of the to-be-dissolved water W3 stored in the ozone water generation unit 6 during the ozone water generation process.
- the memory 82 stores the pH set value of the water W3 to be dissolved in the first process and the second process.
- the pH adjustment control unit 83 controls the pH adjustment unit 84 so that the to-be-dissolved water W3 becomes the pH set value stored in the memory 82 in the first step or the second step.
- the pH adjusting unit 84 stores acid and alkali, and supplies acid or alkali to the ozone water generating unit 6 based on a signal sent from the pH adjusting control unit 83 via the signal line 9g, thereby dissolving water to be dissolved. Adjust the pH of W3.
- the pH adjustment control unit 83 acquires the measured value by the pH sensor 81 via the signal line 9e, and the pH setting value in the first step from the memory 82 via the signal line 9f. get.
- a signal is sent to the pH adjusting unit 84 so that an acid is added, and when the measured value is lower, an alkali is added.
- the pH adjustment control part 83 acquires the pH setting value in a 2nd process from the memory 82, when the process transition signal is received from the process transition judgment means 7, and the to-be-dissolved water W3 is the pH setting value in a 2nd process.
- a signal is sent to the pH adjusting unit 84 for control.
- the pH adjustment means 8 is the dissolved water W3 stored in the ozone water production
- the pH adjusting unit 84 adds an acid to the dissolved water W3 of the ozone water generating unit 6.
- the acid-alkali supply pipe 3f may be a plurality of pipes, and either or both of a pump and a valve may be appropriately installed.
- the acid added to the to-be-dissolved water W3 is, for example, sulfuric acid, nitric acid, hydrochloric acid, an aqueous solution of carbonic acid, carbon dioxide, or the like, and the alkali is, for example, sodium hydroxide or sodium carbonate.
- the water supply start determination unit 10 includes a dissolved ozone sensor 101, a memory (first memory) 102, and a comparison unit (first comparison unit) 103, and includes the dissolved ozone sensor 101 and the comparison unit 103.
- the memory 102 and the comparison unit 103, and the comparison unit 103 and the ozone water supply unit 11 are connected by signal lines 9h, 9i, and 9b, respectively.
- the dissolved ozone sensor 101 measures the dissolved ozone concentration of the to-be-dissolved water W ⁇ b> 3 during the ozone water generation process in the ozone water generation unit 6.
- the measurement of dissolved ozone concentration is preferable because a measurement method using an ultraviolet absorption method can be easily and continuously measured.
- the memory 102 stores a threshold value of dissolved ozone concentration at which ozone water feeding to the separation membrane 2 is started.
- the threshold value of the dissolved ozone concentration is preferably 5 mg / L to 80 mg / L.
- the comparison unit 103 compares the measurement value obtained by the dissolved ozone sensor 101 with the threshold value acquired from the memory 102 via the signal line 9i, and when the measurement value is equal to or greater than the threshold value, the ozone water is transmitted via the signal line 9b.
- a water supply start signal is sent to the water supply unit 11.
- the ozone water supply unit 11 supplies the ozone water W4 generated in the ozone water generation unit 6 to the separation membrane 2 via the ozone water supply pipe 3g. Thereby, the cleaning of the separation membrane 2 by the membrane cleaning apparatus is started.
- the ozone water supply pipe 3g is connected to the filtrate water pipe 3a.
- the ozone water supply pipe 3 g, the filtrate water pipe 3 a, and the separation membrane 2 are connected via a three-way valve 12.
- the on-off valves 13a and 13b are installed in the ozone water supply pipe 3g and the filtrate water pipe 3a, respectively.
- the functions performed by software are realized by the processing circuit 20 including the processor 21 and the memory 22 shown in FIG.
- the function of the comparison unit 73 of the process transition determination unit 7, the pH adjustment control unit 83 of the pH adjustment unit 8, or the comparison unit 103 of the water supply start determination unit 10 is realized by a processor 21 such as a CPU.
- the memory 22 includes a volatile storage device such as a random access memory and a nonvolatile auxiliary storage device such as a flash memory. Further, an auxiliary storage device of a hard disk may be provided instead of the flash memory.
- the processor 21 executes the program input from the memory 22. In this case, a program is input from the auxiliary storage device to the processor 21 via the volatile storage device.
- step S1 the water to be dissolved W3 is supplied to the ozone water generator 6. Specifically, the treated water W2 stored in the treated water tank 5 is sent to the ozone water generating unit 6 via the dissolved water pipe 3c and stored as the dissolved water W3.
- step S2 the first process is performed in step S2. Specifically, the water to be dissolved W3 stored in the ozone water generating unit 6 is adjusted by the pH adjusting unit 8 so as to become the pH set value in the first step stored in the memory 82 of the pH adjusting unit 8. . Further, the ozone gas generated by the ozonizer 61 is supplied to the ozone water generator 6 to dissolve the ozone gas in the water to be dissolved W3.
- step S3 it is determined whether or not the organic matter concentration of the water to be dissolved W3 of the ozone water generation unit 6 is equal to or less than a threshold value. Specifically, the measured value of the organic substance concentration by the organic substance sensor 71 is compared with the threshold value of the organic substance concentration stored in the memory 72. In step S3, when the measured value of the organic substance concentration is larger than the threshold value (NO), the process returns to step S2 and the first process is continued. The pH setting value in the first step is maintained as the pH setting value of the water W3 to be dissolved in the ozone water generation unit 6.
- step S3 when the measured value of the organic substance concentration is equal to or lower than the threshold value (YES), the process proceeds to step S4, and the second step of the ozone water generation step is performed.
- the process transition determining means 7 sends a process transition signal to the pH adjusting means 8 via the signal line 9a.
- the pH adjusting means 8 that has received the process transition signal adjusts so that the water to be dissolved W ⁇ b> 3 becomes the pH set value in the second process stored in the memory 82. At this time, the supply of ozone gas is continued.
- step S5 it is determined whether or not the dissolved ozone concentration of the water to be dissolved W3 is equal to or higher than a threshold value. Specifically, the water supply start determination unit 10 compares the measured value of the dissolved ozone concentration by the dissolved ozone sensor 101 with the threshold value of the dissolved ozone concentration stored in the memory 102. In step S5, when the measured value of the dissolved ozone concentration is smaller than the threshold value (NO), the process returns to step S4 and the second process is continued.
- step S5 when the measured value of the dissolved ozone concentration of the water W3 to be dissolved is equal to or greater than the threshold (YES), the process proceeds to step S6, and the ozone water supply unit 11 starts supplying ozone water W4.
- the water supply start determination means 10 sends a water supply start signal to the ozone water supply unit 11 via the signal line 9b.
- the ozone water supply unit 11 that has received the water supply start signal supplies the ozone water W4 generated in the ozone water generation unit 6 to the separation membrane 2 via the ozone water supply pipe 3g, and starts cleaning the separation membrane 2.
- the supply of ozone gas may be continued during cleaning, or the supply of ozone gas may be stopped as long as a predetermined dissolved ozone concentration can be maintained.
- the treated water W2 filtered by the separation membrane 2 is used as the dissolved water W3, and the membrane cleaning is performed by dissolving the ozone gas in the dissolved water W3 to generate the ozone water W4.
- the pH of the water to be dissolved W3 stored in the ozone water generation unit 6 is adjusted based on the organic substance concentration of the water to be dissolved W3. It is possible to estimate the processing time required for the decomposition of organic matter from the measured concentration value. For this reason, the treatment time required for the decomposition of the organic matter generates ozone water under pH conditions suitable for the decomposition of the organic matter, and thereafter adjusts the pH so that the pH conditions are suitable for increasing the dissolved ozone concentration. It is possible.
- dissolve ozone gas in to-be-dissolved water on acidic conditions are implemented.
- the processing time of the first step can be optimized without excess or deficiency.
- the processing time of the first step can be shortened.
- the processing time of the second step can be optimized without excess or deficiency.
- the ozone water W4 can be efficiently generated regardless of fluctuations in the organic matter concentration of the dissolved water W3 due to the operating conditions of the MBR, and the cost required for generating ozone water. Can be reduced.
- FIG. FIG. 8 shows the overall configuration of the membrane cleaning apparatus according to the second embodiment of the present application
- FIG. 9 shows the configuration of the process transition determining means of the membrane cleaning apparatus according to the second embodiment.
- the film cleaning apparatus according to the second embodiment is different from the film cleaning apparatus according to the first embodiment only in the configuration of the process transition judging means, and the other configurations are the same, so the description thereof is omitted here.
- the film cleaning apparatus includes process transition determination means 7A.
- the process transition determination means 7A includes an organic substance sensor 74, an ozone gas sensor 75, a memory (third memory) 72A, and a comparison unit (third comparison unit) 73A.
- the organic substance sensor 74 and the comparison unit 73A, the ozone gas sensor 75 and the comparison unit 73A, and the memory 72A and the comparison unit 73A are connected by signal lines 9k, 9m, and 9n, respectively.
- the organic substance sensor 74 measures the initial value of the organic substance concentration of the water W3 to be dissolved supplied to the ozone water generation unit 6 before the start of the ozone water generation process.
- the place to install the organic matter sensor 74 is preferably the dissolved water pipe 3c or the ozone water generation unit 6, but is not particularly limited.
- the dissolved water W3 may be sampled before the start of the ozone water generation step to measure the organic substance concentration.
- the organic substance concentration can be measured using UV254, TOC, fluorescence intensity, etc., which are organic substance indicators.
- the ozone gas sensor 75 is installed in the ozone gas pipe 3d and measures the amount of ozone gas supplied to the ozone water generation unit 6 (hereinafter referred to as supply ozone amount).
- the supplied ozone amount is obtained from the integrated value of the ozone gas concentration and the flow rate.
- the amount of supply ozone required before shifting from the first step to the second step varies depending on the initial value of the organic matter concentration of the water to be dissolved W3. That is, if the initial value of the organic substance concentration of the water to be dissolved W3 is high, the amount of supply ozone required to move from the first process to the second process also increases.
- the memory 72A stores a threshold value of the supply ozone amount necessary for shifting from the first step to the second step, which is set corresponding to the initial value of the organic substance concentration of the water to be dissolved W3.
- 73 A of comparison parts acquire the threshold value of the supply ozone amount corresponding to the organic substance density
- the organic substance concentration of the to-be-dissolved water W3 in the ozone water generating step can be estimated using the initial value of the organic substance concentration of the to-be-dissolved water W3 and the supplied ozone amount as parameters.
- the threshold value of the supply ozone amount can be calculated using the following equation 2 that calculates the organic substance concentration of the dissolved water W3 using the initial value of the organic substance concentration of the dissolved water W3 and the supply ozone amount as parameters.
- step S11 the water to be dissolved W3 is supplied to the ozone water generation unit 6.
- step S12 the organic substance sensor 74 measures the initial value of the organic substance concentration of the water W3 to be dissolved.
- step S13 a threshold value of the supply ozone amount for shifting the process is determined.
- the comparison unit 73A of the process transition determination unit 7A acquires the threshold value of the supply ozone amount corresponding to the initial value of the organic substance concentration measured by the organic substance sensor 74 from the memory 72A.
- step S14 it is determined whether or not the supply ozone amount supplied to the dissolved water W3 of the ozone water generating unit 6 is equal to or greater than a threshold value.
- the comparison unit 73A of the process transition determination unit 7A compares the measured value of the supplied ozone amount by the ozone gas sensor 75 with the threshold value determined in step S13.
- step S15 when the measured value of the supplied ozone amount is smaller than the threshold value (NO), the process returns to step S14 and the first process is continued.
- step S15 when the measured value of the supply ozone amount is equal to or greater than the threshold (YES), the process proceeds to step S16, and the second process is performed.
- Step S16 and subsequent steps are the same as step S4 and subsequent steps in the flowchart of FIG.
- the threshold value of the supply ozone amount corresponding to the initial value of the organic substance concentration of the water W3 to be dissolved is determined, and the first value when the measured value of the supply ozone amount is equal to or greater than the threshold value.
- FIG. 11 shows the overall configuration of a film cleaning apparatus according to Embodiment 3 of the present application.
- the film cleaning apparatus according to the third embodiment is different from the film cleaning apparatus according to the first embodiment only in the configuration of the process transition determining means, and the other configurations are the same, so the description thereof is omitted here.
- the film cleaning apparatus includes process transition determination means 7B.
- the process transition determination unit 7B includes a dissolved ozone sensor 76, an ozone gas sensor 75, a memory (fourth memory) 72B, and a comparison unit (fourth comparison unit) 73B.
- the dissolved ozone sensor 76 and the comparison unit 73B, the ozone gas sensor 75 and the comparison unit 73B, the memory 72B and the comparison unit 73B, and the comparison unit 73B and the pH adjusting unit 8 are connected by signal lines 9p, 9m, 9n, and 9a, respectively. .
- the dissolved ozone sensor 76 continuously measures the dissolved ozone concentration of the water to be dissolved W3 stored in the ozone water generation unit 6 during the ozone water generation process.
- the dissolved ozone sensor 101 (see FIG. 4) of the water supply start determining means 10 may also be used as the dissolved ozone sensor 76 of the process transition determining means 7B.
- the ozone gas sensor 75 is installed in the ozone gas pipe 3d and measures the amount of supplied ozone from the integrated value of the ozone gas concentration and the flow rate.
- the memory 72B stores a threshold value of the dissolved ozone concentration necessary for shifting from the first process to the second process, which is set corresponding to the amount of ozone supplied to the dissolved water W3.
- the comparison unit 73B compares the measured value obtained from the dissolved ozone sensor 76 with the threshold value stored in the memory 72B, and when the measured value of the dissolved ozone concentration is equal to or greater than the threshold value, the pH adjustment means 8 is transmitted by the signal line 9a. Send process transition signal to.
- a part of the ozone supplied to the water to be dissolved W3 is dissolved in the water to be dissolved W3 to be dissolved ozone and is consumed by reacting with organic substances in the water to be dissolved W3. For this reason, the organic substance in the to-be-dissolved water W3, dissolved ozone, and the ozone gas supplied are in an equilibrium state. For example, when the concentration of organic matter that consumes ozone decreases, the concentration of dissolved ozone increases. That is, the organic substance concentration in the water to be dissolved W3 can be estimated using the dissolved ozone concentration and the supplied ozone amount as parameters.
- the comparison unit 73B of the process transition determination unit 7B estimates the organic substance concentration of the dissolved water W3 using the dissolved ozone concentration and the supplied ozone amount of the dissolved water W3 as parameters, and based on the estimated organic substance concentration of the dissolved water W3. The transition from the first process to the second process is determined.
- the threshold value of the dissolved ozone concentration can be calculated using the following equation 3 that calculates the organic substance concentration of the water to be dissolved W3 using the dissolved ozone concentration and the supplied ozone amount as parameters.
- the dissolved ozone concentration at which the organic substance concentration calculated using Equation 3 becomes the organic substance concentration threshold value calculated by the organic substance threshold value calculation method (for example, Equation 1) is obtained, and this is used as the dissolved ozone concentration threshold value.
- [Organic substance concentration] f (dissolved ozone concentration, supply ozone amount) (3)
- step S ⁇ b> 21 the dissolved water W ⁇ b> 3 is supplied to the ozone water generation unit 6.
- step S22 the first process is performed in step S22, and then the supplied ozone amount is measured by the ozone gas sensor 75 in step S23.
- step S24 a threshold value of the dissolved ozone concentration for transferring the process is determined.
- the comparison unit 73B of the process transition determination unit 7B acquires the threshold value of the dissolved ozone concentration corresponding to the supplied ozone amount measured by the ozone gas sensor 75 from the memory 72B.
- step S25 it is determined whether or not the dissolved ozone concentration of the water to be dissolved W3 of the ozone water generator 6 is equal to or higher than a threshold value.
- the comparison unit 73B of the process transition determination unit 7B compares the measured value of the dissolved ozone concentration by the dissolved ozone sensor 76 with the threshold value determined in step S24.
- step S25 when the measured value of the dissolved ozone concentration is smaller than the threshold value (NO), the process returns to step S22 and the first process is continued. In step S25, if the measured value of the dissolved ozone concentration is greater than or equal to the threshold value (YES), the process proceeds to step S26 and the second step is performed. Step S26 and subsequent steps are the same as step S4 and subsequent steps in the flowchart of FIG.
- the threshold value of the dissolved ozone concentration corresponding to the supply ozone amount supplied to the dissolved water W3 is determined, and when the measured value of the dissolved ozone concentration is equal to or greater than the threshold value, the first step is started.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
本願の上記以外の目的、特徴、観点及び効果は、図面を参照する以下の詳細な説明から、さらに明らかになるであろう。
以下に、本願の実施の形態1による膜洗浄装置及び膜洗浄方法について、図面に基づいて説明する。図1は、実施の形態1による膜洗浄装置の全体構成を示している。また、図2、図3、及び図4は、実施の形態1による膜洗浄装置の工程移行判断手段、pH調整手段、及び送水開始判断手段の構成をそれぞれ示している。各図において、同一、相当部分には同一符号を付している。
[オゾン水生成時間]=f(有機物濃度、洗浄を開始する溶存オゾン濃度の閾値) (1)
図8は、本願の実施の形態2による膜洗浄装置の全体構成を示し、図9は、実施の形態2による膜洗浄装置の工程移行判断手段の構成を示している。実施の形態2による膜洗浄装置は、工程移行判断手段の構成のみが上記実施の形態1による膜洗浄装置と異なっており、その他の構成は同様であるのでここでは説明を省略する。
[有機物濃度]=f(有機物濃度の初期値、供給オゾン量) (2)
図11は、本願の実施の形態3による膜洗浄装置の全体構成を示している。実施の形態3による膜洗浄装置は、工程移行判断手段の構成のみが上記実施の形態1による膜洗浄装置と異なっており、その他の構成は同様であるのでここでは説明を省略する。
[有機物濃度]=f(溶存オゾン濃度、供給オゾン量) (3)
Claims (11)
- 被処理水にろ過処理を行う分離膜をオゾン水で洗浄する膜洗浄装置であって、
前記分離膜によってろ過処理された処理水を被溶解水として貯留し、被溶解水にオゾンガスを溶解させてオゾン水を生成するオゾン水生成部と、
前記オゾン水生成部にオゾンガスを供給するオゾンガス供給手段と、
被溶解水の有機物濃度に基づいて、前記オゾン水生成部に貯留された被溶解水のpHを調整するpH調整手段とを備えたことを特徴とする膜洗浄装置。 - 被溶解水の溶存オゾン濃度に基づいて、前記オゾン水生成部から前記分離膜へのオゾン水送水の開始を判断する送水開始判断手段と、
前記送水開始判断手段による判断結果に基づいて、前記オゾン水生成部で生成されたオゾン水を前記分離膜へ送水するオゾン水送水部とを備えたことを特徴とする請求項1記載の膜洗浄装置。 - 前記送水開始判断手段は、
前記オゾン水生成部の被溶解水の溶存オゾン濃度を測定する溶存オゾンセンサと、
オゾン水送水を開始する溶存オゾン濃度の閾値を記憶した第1のメモリと、
前記溶存オゾンセンサによる測定値と前記第1のメモリに記憶された閾値とを比較し、前記測定値が前記閾値以上となった場合に前記オゾン水送水部にオゾン水を送水させる第1の比較部とを含むことを特徴とする請求項2記載の膜洗浄装置。 - 前記オゾン水生成部は、中性またはアルカリ性条件下で被溶解水にオゾンガスを溶解する第一工程と、前記第一工程の後、酸性条件下で被溶解水にオゾンガスを溶解する第二工程とを実施することを特徴とする請求項1から請求項3のいずれか一項に記載の膜洗浄装置。
- 被溶解水の有機物濃度に基づいて、前記第一工程から前記第二工程への移行を判断する工程移行判断手段を備えたことを特徴とする請求項4記載の膜洗浄装置。
- 前記工程移行判断手段は、
前記オゾン水生成部の被溶解水の有機物濃度を前記第一工程において測定する有機物センサと、
第一工程から第二工程に移行する有機物濃度の閾値を記憶した第2のメモリと、
前記有機物センサによる測定値と前記第2のメモリに記憶された閾値とを比較し、前記測定値が前記閾値以下となった場合に前記第一工程から前記第二工程に移行するように、前記pH調整手段を制御する第2の比較部とを含むことを特徴とする請求項5記載の膜洗浄装置。 - 前記工程移行判断手段は、
前記オゾン水生成部の被溶解水の有機物濃度の初期値を測定する有機物センサと、
前記オゾン水生成部へ供給されるオゾンガス量を測定するオゾンガスセンサと、
被溶解水の有機物濃度の初期値に対応して設定された第一工程から第二工程に移行するまでに必要なオゾンガス量の閾値を記憶した第3のメモリと、
前記有機物センサにより測定された有機物濃度の初期値に対応する前記閾値を前記第3のメモリから取得し、前記オゾンガスセンサによる測定値と前記閾値とを比較し、前記測定値が前記閾値以上となった場合に前記第一工程から前記第二工程に移行するように、前記pH調整手段を制御する第3の比較部とを含むことを特徴とする請求項5記載の膜洗浄装置。 - 前記工程移行判断手段は、
前記オゾン水生成部の前記第一工程における被溶解水の溶存オゾン濃度を測定する溶存オゾンセンサと、
前記オゾン水生成部へ供給されるオゾンガス量を測定するオゾンガスセンサと、
前記オゾン水生成部へ供給されるオゾンガス量に対応して設定された第一工程から第二工程に移行する溶存オゾン濃度の閾値を記憶した第4のメモリと、
前記オゾンガスセンサにより測定されたオゾンガス量に対応する前記閾値を前記第4のメモリから取得し、前記溶存オゾンセンサによる測定値と前記閾値とを比較し、前記測定値が前記閾値以上となった場合に前記第一工程から前記第二工程に移行するように、前記pH調整手段を制御する第4の比較部とを含み、
前記第4の比較部は、被溶解水の溶存オゾン濃度及び前記オゾン水生成部へ供給されるオゾンガス量をパラメータとして被溶解水の有機物濃度を推定し、推定された被溶解水の有機物濃度に基づいて、前記第一工程から前記第二工程への移行を判断することを特徴とする請求項5記載の膜洗浄装置。 - 前記pH調整手段は、
前記オゾン水生成部に貯留された被溶解水のpHを測定するpHセンサと、
前記オゾン水生成部へ酸またはアルカリを供給し、被溶解水のpHを調整するpH調整部と、
前記第一工程及び前記第二工程における被溶解水のpH設定値をそれぞれ記憶した第5のメモリと、
第一工程及び第二工程において被溶解水が前記第5のメモリに記憶されたそれぞれのpH設定値となるように前記pH調整部を制御するpH調整制御部とを含むことを特徴とする請求項4から請求項8のいずれか一項に記載の膜洗浄装置。 - 前記分離膜は、活性汚泥と処理水とを分離する分離膜であることを特徴とする請求項1から請求項9のいずれか一項に記載の膜洗浄装置。
- 被処理水にろ過処理を行う分離膜をオゾン水で洗浄する膜洗浄方法であって、
前記分離膜によってろ過処理された処理水を被溶解水として用い、被溶解水にオゾンガスを溶解させてオゾン水を生成するオゾン水生成工程を含み、
前記オゾン水生成工程は、中性またはアルカリ性条件下で被溶解水にオゾンガスを溶解する第一工程と、前記第一工程の後、酸性条件下で被溶解水にオゾンガスを溶解する第二工程とを有し、
被溶解水の有機物濃度に基づいて前記第一工程から前記第二工程への移行を判断すると共に、被溶解水の溶存オゾン濃度に基づいて前記分離膜へのオゾン水送水の開始を判断することを特徴とする膜洗浄方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/046,899 US20210053014A1 (en) | 2018-05-30 | 2018-05-30 | Membrane cleaning device and membrane cleaning method |
KR1020207033565A KR20200137017A (ko) | 2018-05-30 | 2018-05-30 | 막 세정 장치 및 막 세정 방법 |
PCT/JP2018/020677 WO2019229866A1 (ja) | 2018-05-30 | 2018-05-30 | 膜洗浄装置及び膜洗浄方法 |
JP2018546906A JP6430091B1 (ja) | 2018-05-30 | 2018-05-30 | 膜洗浄装置及び膜洗浄方法 |
CN201880093508.7A CN112135681B (zh) | 2018-05-30 | 2018-05-30 | 膜清洗装置及膜清洗方法 |
SG11202011443TA SG11202011443TA (en) | 2018-05-30 | 2018-05-30 | Membrane cleaning device and membrane cleaning method |
TW108118138A TWI717743B (zh) | 2018-05-30 | 2019-05-24 | 膜洗淨裝置及膜洗淨方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2018/020677 WO2019229866A1 (ja) | 2018-05-30 | 2018-05-30 | 膜洗浄装置及び膜洗浄方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019229866A1 true WO2019229866A1 (ja) | 2019-12-05 |
Family
ID=64480549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2018/020677 WO2019229866A1 (ja) | 2018-05-30 | 2018-05-30 | 膜洗浄装置及び膜洗浄方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20210053014A1 (ja) |
JP (1) | JP6430091B1 (ja) |
KR (1) | KR20200137017A (ja) |
CN (1) | CN112135681B (ja) |
SG (1) | SG11202011443TA (ja) |
TW (1) | TWI717743B (ja) |
WO (1) | WO2019229866A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022215489A1 (ja) * | 2021-04-05 | 2022-10-13 | キヤノン株式会社 | オゾン含有ウルトラファインバブル液の生成装置およびオゾン含有ウルトラファインバブル液の生成方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021191997A1 (ja) * | 2020-03-24 | 2021-09-30 | 三菱電機株式会社 | 膜洗浄装置および膜分離活性汚泥システム、並びに膜洗浄方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10277572A (ja) * | 1997-04-03 | 1998-10-20 | Japan Organo Co Ltd | 水中の有機物除去方法 |
JP2002166139A (ja) * | 2000-12-04 | 2002-06-11 | Hitachi Plant Eng & Constr Co Ltd | 膜分離装置 |
JP2004105876A (ja) * | 2002-09-19 | 2004-04-08 | Isomura Housui Kiko Kk | ろ過膜の洗浄方法 |
JP2005230731A (ja) * | 2004-02-20 | 2005-09-02 | Kurita Water Ind Ltd | 水処理方法及び水処理装置 |
JP2005324118A (ja) * | 2004-05-14 | 2005-11-24 | Kurita Water Ind Ltd | 水処理方法及び水処理装置 |
JP2007083155A (ja) * | 2005-09-21 | 2007-04-05 | Fuji Electric Systems Co Ltd | 水処理方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001187324A (ja) * | 1999-12-28 | 2001-07-10 | Nkk Corp | 膜ろ過装置の洗浄方法および水処理装置 |
US6755977B2 (en) * | 2002-06-19 | 2004-06-29 | Dennis A. Brunsell | Method in treating aqueous waste feedstream for improving the flux rates, cleaning and the useful life of filter media |
JP4039662B2 (ja) * | 2002-08-13 | 2008-01-30 | 株式会社Sumco | 半導体基板又は素子の洗浄方法 |
KR101816319B1 (ko) * | 2009-06-03 | 2018-01-08 | 구라시키 보세키 가부시키가이샤 | 하이드록실 라디칼 함유수 공급방법 및 하이드록실 라디칼 함유수 공급장치 |
CN102711965A (zh) * | 2010-03-30 | 2012-10-03 | 东丽株式会社 | 分离膜组件的清洗方法和制水方法 |
US20150232357A1 (en) * | 2013-12-27 | 2015-08-20 | Clean Liquid, Llc | Real-time system and processes for controlling ozone gas |
JP6734621B2 (ja) * | 2014-02-20 | 2020-08-05 | オルガノ株式会社 | オゾン水供給方法及びオゾン水供給装置 |
WO2015156242A1 (ja) * | 2014-04-10 | 2015-10-15 | 三菱電機株式会社 | 膜を用いた水処理方法および水処理装置 |
CN115121124A (zh) * | 2014-08-29 | 2022-09-30 | 三菱电机株式会社 | 过滤膜的清洗方法及清洗装置、以及水处理系统 |
CN104710001A (zh) * | 2015-03-11 | 2015-06-17 | 天津市联合环保工程设计有限公司 | 用于污水深度处理的高效臭氧接触反应装置及处理工艺 |
CN207276417U (zh) * | 2017-09-06 | 2018-04-27 | 江西博鑫精陶环保科技有限公司 | 一种陶瓷膜曝气和微正压臭氧膜再生水处理装置 |
-
2018
- 2018-05-30 US US17/046,899 patent/US20210053014A1/en not_active Abandoned
- 2018-05-30 CN CN201880093508.7A patent/CN112135681B/zh active Active
- 2018-05-30 WO PCT/JP2018/020677 patent/WO2019229866A1/ja active Application Filing
- 2018-05-30 KR KR1020207033565A patent/KR20200137017A/ko active IP Right Grant
- 2018-05-30 SG SG11202011443TA patent/SG11202011443TA/en unknown
- 2018-05-30 JP JP2018546906A patent/JP6430091B1/ja active Active
-
2019
- 2019-05-24 TW TW108118138A patent/TWI717743B/zh active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10277572A (ja) * | 1997-04-03 | 1998-10-20 | Japan Organo Co Ltd | 水中の有機物除去方法 |
JP2002166139A (ja) * | 2000-12-04 | 2002-06-11 | Hitachi Plant Eng & Constr Co Ltd | 膜分離装置 |
JP2004105876A (ja) * | 2002-09-19 | 2004-04-08 | Isomura Housui Kiko Kk | ろ過膜の洗浄方法 |
JP2005230731A (ja) * | 2004-02-20 | 2005-09-02 | Kurita Water Ind Ltd | 水処理方法及び水処理装置 |
JP2005324118A (ja) * | 2004-05-14 | 2005-11-24 | Kurita Water Ind Ltd | 水処理方法及び水処理装置 |
JP2007083155A (ja) * | 2005-09-21 | 2007-04-05 | Fuji Electric Systems Co Ltd | 水処理方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022215489A1 (ja) * | 2021-04-05 | 2022-10-13 | キヤノン株式会社 | オゾン含有ウルトラファインバブル液の生成装置およびオゾン含有ウルトラファインバブル液の生成方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI717743B (zh) | 2021-02-01 |
CN112135681A (zh) | 2020-12-25 |
JPWO2019229866A1 (ja) | 2020-06-18 |
KR20200137017A (ko) | 2020-12-08 |
JP6430091B1 (ja) | 2018-11-28 |
SG11202011443TA (en) | 2020-12-30 |
US20210053014A1 (en) | 2021-02-25 |
TW202003098A (zh) | 2020-01-16 |
CN112135681B (zh) | 2021-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103492054B (zh) | 膜组件的洗涤方法 | |
JP6432914B2 (ja) | 水処理方法および水処理装置 | |
JP5933854B1 (ja) | 被処理水の濾過膜の洗浄方法及び洗浄装置、並びに水処理システム | |
CN106132518B (zh) | 使用膜的水处理方法以及水处理装置 | |
JP6695515B1 (ja) | ろ過膜洗浄装置、ろ過膜洗浄方法、および水処理システム | |
JP6430091B1 (ja) | 膜洗浄装置及び膜洗浄方法 | |
WO2019039155A1 (ja) | 水処理膜の洗浄装置及び洗浄方法 | |
JP2009006209A (ja) | 中空糸膜モジュールの洗浄方法 | |
JP6271109B1 (ja) | 水処理膜の洗浄装置及び洗浄方法、並びに水処理システム | |
JP6591093B1 (ja) | オゾン水生成装置、水処理装置、オゾン水生成方法、および、洗浄方法 | |
JP2012086182A (ja) | 水処理方法および水処理装置 | |
JP2009101349A (ja) | 浸漬型膜モジュールの洗浄方法 | |
JP2012086120A (ja) | 浸漬型膜モジュールの薬品洗浄方法 | |
JP2003326258A (ja) | 水処理方法 | |
JP6107987B1 (ja) | 超純水製造システムの洗浄方法 | |
JP2009160512A (ja) | 膜ろ過装置の排水処理方法 | |
JP2009082858A (ja) | 濾過膜の洗浄方法 | |
KR102027900B1 (ko) | 전오존 처리를 적용한 수처리 장치 및 공법 | |
CN115103820A (zh) | 基于过滤特性预测的造水装置的控制方法、造水装置的故障判定方法、造水装置、造水装置的运行程序、造水装置的故障判定程序和记录介质 | |
JP2005218904A (ja) | 水処理装置 | |
JP7120496B1 (ja) | 濾過膜洗浄装置、水処理装置及び濾過膜洗浄方法 | |
WO2022157926A1 (ja) | 濾過膜の洗浄装置、水処理装置及び濾過膜の洗浄方法 | |
JP6952930B1 (ja) | 水処理装置および水処理方法 | |
JP3449247B2 (ja) | 水処理方法およびその装置 | |
CN115297949A (zh) | 水处理系统 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2018546906 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18920732 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20207033565 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18920732 Country of ref document: EP Kind code of ref document: A1 |