WO2011001803A1 - Procédé de nettoyage d'un module de filtration membranaire et dispositif de nettoyage - Google Patents

Procédé de nettoyage d'un module de filtration membranaire et dispositif de nettoyage Download PDF

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Publication number
WO2011001803A1
WO2011001803A1 PCT/JP2010/059779 JP2010059779W WO2011001803A1 WO 2011001803 A1 WO2011001803 A1 WO 2011001803A1 JP 2010059779 W JP2010059779 W JP 2010059779W WO 2011001803 A1 WO2011001803 A1 WO 2011001803A1
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WO
WIPO (PCT)
Prior art keywords
filtration membrane
membrane module
air
module
cleaning
Prior art date
Application number
PCT/JP2010/059779
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English (en)
Japanese (ja)
Inventor
茂雄 佐藤
和宏 豊岡
Original Assignee
株式会社明電舎
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社明電舎 filed Critical 株式会社明電舎
Priority to KR1020127000535A priority Critical patent/KR101415678B1/ko
Priority to SG2011091964A priority patent/SG176812A1/en
Priority to CN201080029200.XA priority patent/CN102470325B/zh
Publication of WO2011001803A1 publication Critical patent/WO2011001803A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • 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
    • 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
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/20—Specific housing
    • B01D2313/205—Specific housing characterised by the shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/06—Submerged-type; Immersion type
    • 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
    • B01D2321/04—Backflushing
    • 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
    • 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
    • B01D2321/18—Use of gases
    • B01D2321/185—Aeration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/002—Apparatus and plants for the biological treatment of water, waste water or sewage comprising an initial buffer container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a cleaning method and a cleaning apparatus for a filtration membrane module that performs a filtration operation by immersing a pollutant in sewage or industrial wastewater in a reaction tank for biological treatment or coagulation sedimentation treatment.
  • a membrane separation treatment system that performs biological treatment or coagulation sedimentation treatment of pollutants in sewage and industrial wastewater, and filters them with a filtration membrane module, the filtration membrane module is immersed in a reaction tank and filtered water is filtered.
  • Membrane separation In a membrane separation treatment system that performs biological treatment or coagulation sedimentation treatment of pollutants in sewage and industrial wastewater, and filters them with a filtration membrane module, the filtration membrane module is immersed in a reaction tank and filtered water is filtered. Membrane separation.
  • the removed pollutant or the like adheres to and accumulates on the membrane surface of the membrane membrane module and the pores inside the membrane surface.
  • aeration is performed from the bottom of the filtration membrane module, and intense bubble flow on the membrane surface. Scrubbing air is supplied in order to prevent adhesion and accumulation by colliding.
  • the filtered water is pressurized and passed through the membrane filter module at a fixed period to remove the dirt backwashing.
  • scrubbing air and backwashing there is a limit to the long-term suppression effect even by scrubbing air and backwashing. For this reason, in order to periodically remove contaminants that gradually adhere to and deposit on the film surface even by scrubbing air or backwashing, it is essential to perform chemical cleaning that reacts and removes the contaminants that adhere and deposit.
  • sodium hypochlorite is widely used when the pollutant or the like deposited or deposited is organic, and oxalic acid is used when it is inorganic.
  • in-line cleaning and on-air cleaning are known as a method for cleaning a membrane filter module using this chemical solution.
  • In-line cleaning is performed by injecting a chemical solution such as sodium hypochlorite solution from the secondary side (filtrated water removal side) of the filtration membrane module while the filtration membrane module immersed in the reaction tank is immersed. Is permeated and permeated into the primary side (filtered water supply side) of the filtration membrane module to perform chemical cleaning of the filtration membrane module (hereinafter referred to as a first cleaning method).
  • a chemical solution such as sodium hypochlorite solution from the secondary side (filtrated water removal side) of the filtration membrane module while the filtration membrane module immersed in the reaction tank is immersed.
  • Is permeated and permeated into the primary side (filtered water supply side) of the filtration membrane module to perform chemical cleaning of the filtration membrane module hereinafter referred to as a first cleaning method.
  • a chemical solution such as a sodium hypochlorite solution is injected from the secondary side of the filtration membrane module while the filtration membrane module is exposed to the air, and the chemical solution is injected from the secondary side of the filtration membrane module.
  • the filtration membrane module is permeated and permeated to the primary side to perform chemical cleaning.
  • the first is that the filtration membrane module is pulled out from the submerged reaction tank and exposed to the air, and a chemical solution such as a sodium hypochlorite solution is injected from the secondary side of the filtration membrane module, and the chemical solution is removed from the filtration membrane.
  • a chemical solution such as a sodium hypochlorite solution
  • the membrane filter is permeated and permeated from the secondary side to the primary side of the module to clean the filtration membrane module (hereinafter referred to as a second cleaning method).
  • the second is that the liquid in the tank is discharged from the reaction tank in which the filtration membrane module is immersed, and the filtration membrane module is exposed to the air in the reaction tank.
  • This is a method of injecting a chemical solution such as a sodium chlorate solution and allowing the chemical solution to permeate and permeate the primary side of the filtration membrane module to wash the filtration membrane module (hereinafter, a third cleaning method).
  • the third is that, in the case of processing the pollutant and the like by an external immersion tank system provided with a tank dedicated to the filtration membrane module separately from the reaction tank, the chemical solution cleaning in this system is an external immersion tank. Since only the liquid in the tank needs to be discharged, the amount of the discharged liquid can be reduced as compared with the third cleaning method, and further, after taking a method of temporarily storing the discharged liquid in the reaction tank, The same chemical cleaning method as the third cleaning method can be used for the filtration membrane module (hereinafter referred to as a fourth cleaning method).
  • Patent Document 1 discloses the above-described cleaning method.
  • the chemical solution is injected in a state where the filtration membrane module is immersed in the liquid in the reaction tank.
  • the chemical solution that has permeated and permeated on the surface of the filtration membrane module is diluted by the solution in the tank, so cleaning of contaminated substances attached to and deposited on the membrane surface of the filtration membrane module The effect is reduced.
  • medical solution does not spread over this clogging part but a cleaning spot generate
  • a chemical solution must be injected into the filtration membrane module in a large amount at a higher pressure, which requires a high-pressure pump and a large amount of chemical solution.
  • the second cleaning method (on-air cleaning method) it is necessary to use a lifting device such as a chain block in order to pull out the filtration membrane module from the reaction tank and move it in the air. It is necessary to perform complicated operations such as removing the scrubbing air pipe and installing it after completion of cleaning.
  • the third cleaning method requires a separate storage tank for temporarily storing the liquid in the tank extracted from the reaction tank.
  • the filtration membrane module is immersed to the bottom of the reaction tank at a depth of 4 to 5 m. In order to expose the entire filtration membrane module to the air, almost all of the liquid in the reaction tank is drawn out. This leads to an increase in construction costs and operating costs due to the installation and installation of large capacity tanks and transfer pumps that temporarily store the liquid in the tank.
  • the fourth cleaning method on-air cleaning method
  • the fourth cleaning method that is, in the external immersion tank method provided with a tank dedicated to the filtration membrane module separately from the reaction tank
  • only the liquid in the external immersion tank is discharged.
  • the amount of the discharged liquid can be reduced as compared with the third cleaning method, and the discharged liquid can be transferred to the reaction tank and temporarily used as a storage tank.
  • the construction cost and the operating cost are increased although they do not reach the apparatus by the third cleaning method, such as the installation of an external immersion tank and the need for a liquid transfer pump from the reaction tank to the external immersion tank.
  • the object of the present invention is to reduce the cleaning ability in the first cleaning method, to increase the pressure of the pump for injecting the chemical solution for this countermeasure, and to increase the amount of the chemical solution to be used.
  • the problem is that it requires lifting equipment such as a chain block to be moved to the air, and requires complicated work such as removal of filtered water piping and scrubbing air piping, etc., and installation after completion of cleaning.
  • this cleaning method there are problems that require equipment such as a large-capacity tank for temporarily storing the extracted liquid in the tank and a transfer pump, and the fourth cleaning method is used for installation and transfer of an external immersion tank.
  • the filtration membrane module cleaning method of the present invention injects a chemical solution for cleaning from the secondary side of the filtration membrane module placed soaked in a reaction tank, and permeates and permeates the chemical solution to the primary side of the filtration membrane module.
  • the filtration membrane module cleaning method for cleaning the filtration membrane module the filtration membrane module is accommodated in a module casing (cleaning casing), and air, oxygen gas, carbon dioxide gas, nitrogen gas, etc. are easily handled as air in the module casing.
  • Supply gas hereinafter collectively referred to as air
  • the liquid in the tank is expelled from the module casing, and the filtration membrane module is subjected to chemical cleaning with the filtration membrane module in the module casing exposed to the air. .
  • the cleaning device for a filtration membrane module of the present invention includes a chemical solution injection device that injects a chemical solution for cleaning on the secondary side of the filtration membrane module that is immersed in a reaction tank.
  • a filtration membrane module cleaning apparatus that permeates and permeates a primary side of a filtration membrane module to wash the filtration membrane module, and stores the filtration membrane module in the air.
  • a module casing capable of storing air to be exposed, and an air supply device for supplying air into the module casing to expose the filtration membrane module to the air are provided.
  • the module casing was formed into a covered cylindrical shape with the bottom opened and the top closed with a lid plate, and a liquid and air outflow valve for communicating the inside and outside of the module casing with the lid plate was provided.
  • a pressure air drive valve was used as the liquid and air outflow valve.
  • An air blower or a scrubbing blower was used (also used) as an air supply device for supplying the module casing.
  • the filtration membrane module cleaning method of the present invention supplies the air into the module casing containing the filtration membrane module, and fills the inside of the module casing with air so that the filtration membrane module is exposed to the air. Since the chemical solution is injected into the secondary side of the filter membrane module, the filtration membrane module is not subjected to fluid pressure compared to the conventional in-line cleaning method in which the chemical solution is injected while the conventional filtration membrane module is immersed in the reaction vessel. Perhaps the chemical solution is easy to penetrate and permeate. The chemical liquid that has exuded from the pores on the membrane surface of the filtration membrane module does not react with the liquid in the tank and the effect of the chemical liquid does not decrease.
  • the filtration membrane module cleaning method of the present invention is implemented by adding a simple process of storing the filtration membrane module in the module casing and supplying air into the module casing to the conventional in-line cleaning method. be able to.
  • the filtration membrane module cleaning device of the present invention is simple to the conventional inline cleaning device in which the filtration membrane module of the conventional inline cleaning device is accommodated in the module casing and air is supplied to the module casing by the air supply device. It can be implemented by making improvements. Then, by supplying air into the module casing with the air supply device, the inside of the module casing is filled with air and the filtration membrane module is exposed to the air. In this state, the chemical solution is filtered by the chemical solution injector. The filtration membrane module can be washed on-air by being injected into the secondary side of the membrane module.
  • the module casing is formed in a covered cylindrical shape having an opening at the bottom and closed at the top by a lid plate, air can be supplied into the module casing from the opening by an air supply device. Since the liquid and air outflow valves are provided on the cover plate of the module casing, the liquid and air outflow valves can be opened and closed to store or discharge air in the module casing. Therefore, the operation system of the filtration membrane module cleaning device of the present invention can be formed by a simple improvement of adding the operation of opening and closing the liquid and air outflow valves to the operation system of the conventional in-line cleaning device.
  • an air blower or scrubbing blower for the air supply device that is supplied into the module casing eliminates the need for a dedicated air compressor as an air supply device. Can be lowered.
  • FIG. 1 is a flow diagram of a sewage treatment system using a membrane separation activated sludge method (MBR) equipped with a filtration membrane module cleaning device of the present invention.
  • MLR membrane separation activated sludge method
  • raw water 1 such as sewage and industrial effluent is introduced into a screen tank 2 and sent to a flow rate adjusting tank 4 in a state in which dust and the like are removed by a fine screen 3, and a pump is supplied from the flow rate adjusting tank 4
  • the flow rate is adjusted at 5 and sent to the denitrification tank 6, and the denitrification tank 6 is sent to the reaction tank 7 by natural flow due to the difference in water level.
  • the return pump 8 returns the reaction tank 7 to the denitrification tank 6, and the activated sludge circulates between the denitrification tank 6 and the reaction tank 7, and a part thereof is extracted from the reaction tank 7 as excess sludge by the sludge extraction valve 9. It is.
  • inflow water (hereinafter, filtered water) is biologically treated with activated sludge, filtered through a filtration membrane module 11 disposed in the reaction tank 7, and filtered water (hereinafter, filtered water).
  • Water is sent to the filtrate water tank 13 through the filtration pipe 12, temporarily stored in the filtrate water tank 13, and then discharged from the filtrate water tank 13 by the pump 14.
  • the filtration membrane module 11 is a cylindrical hollow fiber membrane module such as polyvinylidene fluoride (PVDF).
  • PVDF polyvinylidene fluoride
  • the filtration membrane module 11 performs filtration by allowing the solution in the reaction tank to permeate.
  • One or more filtration membrane modules 11 are arranged in the reaction tank 7.
  • a filtration / backwash pump 18 is provided in the middle of the filtration pipe 12.
  • the filtration / backwash pump 18 filters the water to be filtered, or when the filtrated membrane module 11 is backwashed and washed by supplying the filtrated water in the filtrated water tank 13 to the membrane filter module 11 every set time, It is used when the chemical solution is washed out after the filtration membrane module 11 is washed with the chemical solution by the chemical solution injection device 26 described later.
  • the filtration pipe 12 is provided with first and second valves 19 and 20 on the upstream side (reaction tank 7 side) and the downstream side (filtrated water tank 13 side) with a filtration / backwash pump 18 interposed therebetween. . Further, the filtration pipe 12 is provided with a first filtered water reverse flow path 21 that connects the upstream side of the first valve 19 and between the filtration / backwash pump 18 and the second valve 20. A third valve 22 is provided in the first filtered water reverse flow path 21. Further, the filtration pipe 12 is provided with a second filtrate reverse flow path 23 connecting the filtration / backwash pump 18 and the first valve 19 and the filtrate water tank 13, and the second filtrate reverse flow path 23. Is provided with a fourth valve 24.
  • the filtration membrane module 11 is cleaned by a filtration membrane module cleaning device 25 described below.
  • the filtration membrane module cleaning device 25 includes a chemical solution injection device 26 that injects a cleaning chemical solution such as a sodium hypochlorite solution into the secondary side of the filtration membrane module 11 during module cleaning.
  • a module casing (cleaning casing) 27 that can store the filtration membrane module 11 and expose the filtration membrane module 11 to the air, and an air supply device 28 that supplies air into the module casing 27 It is made up of.
  • the air supply device 28 also serves as a scrubbing blower 16, and the air is supplied into the module casing 27 from the opening at the bottom of the module casing 27 by positioning the scrubbing diffuser 17 at the bottom of the module casing 27. It is like that.
  • the chemical solution injection device 26 includes a chemical solution tank 29 containing a chemical solution for cleaning such as a sodium hypochlorite solution, a chemical solution supply pump 30, and a chemical solution supply path 31 for supplying the chemical solution in the chemical solution tank 29 to the filtration membrane module 11. And a fifth valve 32 provided in the chemical solution supply path 31.
  • the chemical solution supply path 31 is connected to the upstream side (filtration membrane module 11 side) of the first filtered water reverse flow path 21.
  • the module casing 27 is made of a material such as an airtight metal that is hardly eroded by the chemical solution.
  • the module casing 27 is formed in a cylindrical shape having a diameter larger than the diameter of the filtration membrane module 11 and longer than the length of the filtration membrane module 11, and stores one or more filtration membrane modules 11.
  • a liquid and air outflow valve 33 is provided at the upper part of the module casing 27.
  • the bottom of the module casing 27 is open and the top is closed with a lid plate.
  • the air removes the activated sludge (water to be filtered) in the module casing 27 and the module.
  • the perimeter of the filtration membrane module 11 that is accumulated in the casing 27 and accommodated in the module casing 27 is covered with air.
  • the liquid and air outflow valve 33 is opened to discharge air from the module casing 27 so that the activated sludge can enter the module casing 27 and the module casing 27 is filled with the activated sludge. After that, the circulation property of the activated sludge between the inside and outside of the module casing 27 is ensured. It is desirable to use a pressure air drive valve for the liquid and air outflow valve 33. By providing a plurality of liquid and air outflow valves 33 instead of only one, it is possible to improve the speed of discharging the air inside the module casing 27 and the circulation of activated sludge inside and outside the module casing 27.
  • the position at which the liquid and air outflow valve 33 is provided is not necessarily the upper cover plate of the module casing 27, but can be discharged to a state where the filtration membrane module 11 is not exposed to the air accumulated in the module casing 27. Is good.
  • the operation of the filtration membrane module cleaning device will be described.
  • the fifth valve 32 of the chemical liquid injector 26 is closed, the liquid and air outflow valve 33 is opened, and the first and second valves 19 and 20 provided in the filtration pipe 12 are opened to perform filtration /
  • the backwash pump 18 is driven, the water to be filtered in the reaction tank 7 is filtered by the membrane filter module 11 to become filtered water, sent to the filtered water tank 13 and temporarily stored.
  • the diffuser blower 15 is stopped, the filtration / backwash pump 18 is stopped, the first and second valves 19 and 20 are closed, and the liquid and air outflow valves are closed. 33 is closed.
  • the scrubbing blower 16 is driven, the air sent out from the scrubbing blower 16 enters the module casing 27 through an opening provided at the bottom of the module casing 27 via the scrubbing air diffuser 17, and enters the module casing 27. While removing the activated sludge in 27, it accumulates in the module casing 27.
  • the fifth valve 32 is opened, the chemical solution supply pump 30 is driven, and the chemical solution in the chemical solution tank 29 is added to a predetermined amount, Over a predetermined time, it is injected into the filtration membrane module 11, and the filtration membrane module 11 is washed with a chemical solution.
  • the chemical liquid supply pump 30 is stopped, the fifth valve 32 is closed, and the third and fourth valves 22 and 24 are closed while the first and second valves 19 and 20 are closed. Open and drive the filtration / backwash pump 18 again to supply the filtrate water in the filtrate tank 13 to the filtration membrane module 11 via the second filtrate reverse flow path 23 and the first filtrate reverse flow path 21; By washing the filtration membrane module 11 with filtered water, the chemical solution remaining on the membrane surface of the filtration membrane module 11 is washed away, and the washing of the filtration membrane module 11 is completed.
  • the washing step of the chemical solution may be performed after the activated sludge in the module casing 27 is filled.
  • the liquid and air outflow valve 33 is opened.
  • the air in the module casing 27 passes through the liquid and air outflow valve 33 and is discharged out of the module casing 27, and activated sludge enters the module casing 27,
  • the module casing 27 is filled with activated sludge. Therefore, the first and second valves 19 and 20 are opened again, and the aeration blower 15, the filtration / backwash pump 18, the scrubbing blower 17 and the like are driven to resume the filtration.
  • a timer setting is sufficient for returning to the filtration operation.
  • the filtration membrane module cleaning device of the embodiment has the above-described configuration and has the following effects.
  • (1) With a simple method of storing the filtration membrane module in the module casing and supplying air, it becomes possible to perform on-air cleaning while the filtration membrane module is immersed in the reaction tank. Compared with the method of discharging activated sludge from the tank or extracting the filtration membrane module from the reaction tank and performing on-air cleaning, the on-air cleaning of the filtration membrane module can be performed easily.
  • the filtration membrane module can be individually washed on-air without removing the filtration membrane module in the air.
  • the filtration membrane module can be individually washed on-air (for each module casing), so other filtration membranes except for the membrane membrane being washed are removed. A membrane module can be used, and a stable amount of filtration can be ensured. (3) Since the chemical membrane cleaning can be performed while the filtration membrane module is immersed in the reaction vessel, the filtration membrane module cleaning device can be easily incorporated into the automatic operation of the sewage treatment system.
  • the chemical cleaning frequency can be set high, clogging of the filtration membrane module can be suppressed, and stable processing capability can be ensured.
  • the specially added parts are a module casing for housing the filtration membrane module, a liquid and air outflow valve attached to the module casing, and an air source for valves.
  • a scrubbing blower is used in an air supply device that supplies air to the module casing, the number of parts can be reduced and the cost can be reduced accordingly. Therefore, it can be manufactured at a much lower cost than a conventional on-air cleaning apparatus, and uses less energy.
  • the scrubbing blower 16 and the scrubbing air diffuser 17 are used for the air supply device 28, and the scrubbing air diffuser 17 is disposed facing the opening at the bottom of the module casing 27.
  • the air supply path 34 that connects the scrubbing blower 16 and the scrubbing air diffuser 17 is used.
  • a branch path (not shown) may be connected to the module casing 27 via a switching valve (not shown), and the tip of the branch path may be connected to the module casing 27 to supply air into the module casing 27.
  • a dedicated air supply blower may be used without using the scrubbing blower 16 or the diffuser blower 15.
  • the shape of the module casing 27 is not limited to a covered cylinder shape, It is made to respond
  • the single filtration / backwash pump 18 performs both backwashing and filtration, but the filtration and backwashing may be performed by separate pumps.
  • the material of the filtration membrane module 11 does not ask
  • the structure of the filtration membrane module 11 may be a flat membrane, a hollow fiber membrane, a single tube membrane, or the like.
  • a sodium hypochlorite solution etc. from the secondary side of the filtration membrane module arrange
  • a filtration membrane module cleaning method of injecting a chemical solution and permeating the chemical solution into the primary side of the filtration membrane module to wash the filtration membrane module the filtration membrane module is accommodated in a module casing, and air is introduced into the module casing.
  • the chemical solution is injected into the secondary side of the filtration membrane module while the filtration membrane module is exposed to the air, and the chemical solution is allowed to permeate the primary side of the filtration membrane module.
  • Filtration membrane module cleaning method is disclosed.
  • the membrane separation processing system which processes the pollutant in a sewage wastewater or industrial wastewater by biological treatment, and filters with the filtration membrane module for the filtration membrane module washing
  • the present invention can be applied not only to a submerged membrane but also to a casing housing type membrane module.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Dans un procédé de nettoyage à l'air classique et un dispositif de nettoyage, un module de filtration membranaire est retiré d'une cuve de réaction et un produit chimique doit être injecté dans le module de filtration membranaire qui est exposé à l'air, ce qui nécessite par conséquent un travail compliqué et un degré élevé de coût d'installation et d'espace requis par l'installation. Pour résoudre les problèmes ci-dessus, selon l'invention, un module de filtration membranaire (11) est nettoyé d'une manière telle que : le module de filtration membranaire (11) est logé dans un boîtier de module (27) ; de l'air est introduit dans le boîtier du module (27), ce qui remplit de cette manière d'air l'intérieur du boîtier du module (27) ; un produit chimique de nettoyage tel que, par exemple, une solution d'hypochlorite de sodium est injecté dans le côté secondaire du module de filtration membranaire (11) alors que le module de filtration membranaire (11) est exposé à de l'air ; et le produit chimique est amené à pénétrer du côté primaire du module de filtration membranaire (11).
PCT/JP2010/059779 2009-07-03 2010-06-09 Procédé de nettoyage d'un module de filtration membranaire et dispositif de nettoyage WO2011001803A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020127000535A KR101415678B1 (ko) 2009-07-03 2010-06-09 막분리 활성오니 처리방법 및 처리장치
SG2011091964A SG176812A1 (en) 2009-07-03 2010-06-09 Filtration membrane module cleaning method and cleaning device
CN201080029200.XA CN102470325B (zh) 2009-07-03 2010-06-09 过滤膜模块清洁方法和清洁设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009159188A JP5423184B2 (ja) 2009-07-03 2009-07-03 濾過膜モジュール洗浄方法および洗浄装置
JP2009-159188 2009-07-03

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Publication Number Publication Date
WO2011001803A1 true WO2011001803A1 (fr) 2011-01-06

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CA2964891C (fr) 2014-10-22 2021-11-09 Koch Membrane Systems, Inc. Module de filtrage de membrane et dispositif de gazeification a liberation dans un faisceau
USD779632S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Bundle body

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CN102470325A (zh) 2012-05-23
KR101415678B1 (ko) 2014-08-05
JP2011011173A (ja) 2011-01-20

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