WO2020030943A1 - Système de traitement d'eau grise - Google Patents

Système de traitement d'eau grise Download PDF

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Publication number
WO2020030943A1
WO2020030943A1 PCT/IB2018/055885 IB2018055885W WO2020030943A1 WO 2020030943 A1 WO2020030943 A1 WO 2020030943A1 IB 2018055885 W IB2018055885 W IB 2018055885W WO 2020030943 A1 WO2020030943 A1 WO 2020030943A1
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WO
WIPO (PCT)
Prior art keywords
filtration unit
permeate
tank
microfiltration
mixing
Prior art date
Application number
PCT/IB2018/055885
Other languages
English (en)
Inventor
Ali Akbar BABALUO
Seyyed Mohsen MOGHIMI
Mohammadreza HAYATI
Masood GOHAR GERANBAHA
Zeinab DARABI
Sajjad DARVISHI GILAN
Jamal AHMADI
Original Assignee
Babaluo Ali Akbar
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 Babaluo Ali Akbar filed Critical Babaluo Ali Akbar
Priority to PCT/IB2018/055885 priority Critical patent/WO2020030943A1/fr
Publication of WO2020030943A1 publication Critical patent/WO2020030943A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/58—Multistep processes
    • 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
    • B01D61/149—Multistep processes comprising different kinds of membrane processes selected from ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • B01D61/146—Ultrafiltration comprising multiple ultrafiltration steps
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/06—Specific process operations in the permeate stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2626—Absorption or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2642—Aggregation, sedimentation, flocculation, precipitation or coagulation
    • 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
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • 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
    • B01D61/147—Microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

Definitions

  • the present disclosure relates to water treatment systems, particularly to a gray water treatment system.
  • Gray water is wastewater that is generated by sinks, showers, washing machines, dishwashers, etc. in different places such as households, office building, and from industrial sources such as carwashes, laundromats, and the like. Gray water is contaminated lightly and does not include fecal contamination. Since gray water contains fewer high-level organic contaminants and bacteria in comparison with domestic wastewater from toilets, it may be safely treated and reused onsite for washing cars, toilet flushing, irrigation, and similar other applications. Reusing the treated gray water in water systems not only reduces the fresh water demand but it also reduces the amount of wastewater to be handled and treated.
  • a key point in treatment of the gray water is source separation, because if the gray water is not properly separated from the sewage, it should be treated by relatively more complex methods utilized in sewage treatment plants. Once the gray water is separated from the sewage, it may be treated in treatment processes that are smaller and simpler than those utilized in sewage treatment plants. This allows for onsite treatment of the gray water.
  • U.S. Pat. App. No. 2017/0297939 discloses a recycling system for receiving, storing, and recycling household waste influent that utilizes a filtration system and an ultrafiltration system for the treatment of gray water.
  • U.S. Pat. No. 5,868,937 discloses a process and system for recycling and reusing gray water utilizing ultrafiltration.
  • the present disclosure is directed to a gray water treatment system that may include at least one mixing tank connected with a discharge of grey water, a first filtration unit including at least one microfiltration membrane, where the grey water from the at least mixing tank may be fed to the first filtration unit and the first filtration unit may generate a first permeate and a first retentate.
  • the gray water treatment system may further include an adsorption unit including at least one adsorbent bed filled with an adsorbent material, where the first permeate from the first filtration unit fed to the adsorption unit, and a second filtration unit including at least one ultrafiltration membrane, where a discharge from the adsorption unit may be fed to the second filtration unit and the second filtration unit may generate a second permeate and a second retentate.
  • an adsorption unit including at least one adsorbent bed filled with an adsorbent material, where the first permeate from the first filtration unit fed to the adsorption unit, and a second filtration unit including at least one ultrafiltration membrane, where a discharge from the adsorption unit may be fed to the second filtration unit and the second filtration unit may generate a second permeate and a second retentate.
  • the at least one mixing tank may further configured to flocculate the discharge of grey water received therein by mixing the gray water with a flocculent.
  • the flocculent may have a concentration between 50 and 200 mgL 1 .
  • the flocculent may include FeCh, FeS0 4 , Ah(S0 4 )3, and mixtures thereof.
  • the at least one mixing tank may further include a mixing mechanism to mix the gray water with the flocculent, where the mixing mechanism may either a mechanical mixer or a blower.
  • the first retentate may be fed back to the at least one mixing tank.
  • the second retentate may be mixed with the first permeate and obtained mixture may be fed to the adsorption unit.
  • the gray water treatment system may further include a microfiltration pump generating a vacuum driving force of 0.4 to 0.6 bar to drive the gray water from the at least one mixing tank through the at least one microfiltration membrane
  • the at least one microfiltration membrane may have an average pore size in a range between 100 and 500 nanometers.
  • the at least one ultrafiltration membrane may have an average pore size in a range between 50 and 200 nanometers.
  • the adsorption unit may include a packed column with the adsorbent material.
  • the adsorbent material may be activated carbon.
  • the gray water treatment system may further include an ultrafiltration pump that may generate a vacuum driving force of 0.4 to 0.6 bar to drive the discharge from the adsorption unit through the at least one ultrafiltration membrane.
  • a first predetermined portion of the second permeate may be fed back to the first filtration unit as a first backwash stream and a second predetermined portion of the second permeate may be fed back to the second filtration unit as a second backwash stream.
  • the present disclosure is directed to a water treatment plant.
  • the water treatment plant may include at least one mixing/flocculating tank that may be connected with a discharge of grey water.
  • the at least one mixing/flocculating tank may mix and selectively subject the gray water to a flocculation process by mixing the gray water with a flocculent.
  • the water treatment plant may further include a first filtration unit.
  • the first filtration unit may include a microfiltration tank receiving the grey water from the at least mixing tank therein, and a microfiltration module disposed within the microfiltration tank, where the microfiltration module may include at least one microfiltration membrane to filter the gray water and thereby generate a first permeate and a first retentate.
  • the water treatment plant may further include an adsorption unit that may include at least one adsorbent bed filled with an adsorbent material, where the first permeate from the first filtration unit may be fed to the adsorption unit.
  • the water treatment plant may further include a second filtration unit.
  • the second filtration unit may include an ultrafiltration tank receiving the discharge from the adsorption unit therein, and an ultrafiltration module disposed within the ultrafiltration tank, the ultrafiltration module including at least one ultrafiltration membrane generating a second permeate and a second retentate.
  • the water treatment plant may further include a product tank receiving the second permeate therein.
  • the product tank may further be equipped with a back wash pump, where the back-wash pump may feed a first predetermined portion of the second permeate back to the first filtration unit as a first backwash stream and it may feed a second predetermined portion of the second permeate back to the second filtration unit as a second backwash stream.
  • the back-wash pump may feed a first predetermined portion of the second permeate back to the first filtration unit as a first backwash stream and it may feed a second predetermined portion of the second permeate back to the second filtration unit as a second backwash stream.
  • FIG. 1 illustrates a box diagram of a gray water treatment system, according to one or more embodiments of the present disclosure
  • FIG. 2 illustrates a box diagram of gray water treatment system, according to one or more embodiments of the present disclosure
  • FIG. 3 illustrates a schematic of a gray water treatment plant, according to one or more embodiments of the present disclosure
  • FIG. 4 illustrates a flowchart of operations in a gray water treatment plant, according to an exemplary embodiment of the present disclosure.
  • FIG. 5 illustrates a microfiltration module, according to an exemplary embodiment of the present disclosure.
  • FIG. 1 illustrates a box diagram of a gray water treatment system 100, according to one or more embodiments of the present disclosure.
  • Treatment system 100 may include a mixing tank 102 for receiving a discharge of gray water from a gray water feed line 104; a first filteration unit 106 that may be equiped with a microfiltration module; an adsorption unit 108 for contacting the gray water with an adsorbent bed; and a second filtration unit 110 that may be equiped with an ultrafiltration module.
  • mixing tank 102 may further be configured for mixing and flocculating the gray water.
  • a flocculant may be mixed with the gray water received from gray water feed line 104 in mixing tank 102.
  • the flocculant may be an environmental friendly flocculant such as FeCh, FeS0 4 , Al 2 (S04)3, and mixtures thereof.
  • the flocculant may be added to mixing tank 102 for gray water feeds that contain fat/grease and detergents.
  • the flocculant may be added in relatively small doses between approximately 50 to 200 mgL 1 .
  • Mixing tank 102 may be equiped with a sludge discharge 112 that may be utilized to discharge the sludge that may be formed in mixing tank 102.
  • first filteration unit 106 may be equiped with a microfiltration module (not explicitly visible in FIG. 1).
  • the microfiltration module may include at least one microfiltration membrane. Once the flocculation process is completed in mixing tank, gray water may be fed into first filtration unit 106.
  • the at least one microfiltration membrane may have an average pore size in a range between approximately 100 and 500 nm.
  • Most suspended particles, detergents, fat/grease, and microorganisms may be separated by passing the gray water through the at least one microfiltration membrane to obtain a first permeate stream 114 which is free from suspended particles, detergents, fat/grease, and microorganisms to a large extent.
  • first permeate stream 114 may be fed into adsorption unit 108.
  • adsorption unit 108 may include at least one adsorbent bed filled with an adsorbent material.
  • Adsorption units may be a suitable growth environment for microorganisms and bacteria, however in gray water treatment system 100, according to an exemplary embodiment of the present disclosure, subjecting the gray water to microfiltration in first filtration unit 106 before feeding the gray water to adsorption unit 108 may prevent microorganisms and bacteria to grow in the at least one adsorbent bed.
  • second filteration unit 110 may be equiped with an ultrafiltration module (not explicitly visible in FIG. 1).
  • the ultrafiltration module may include at least one ultrafiltration membrane.
  • the at least one ultrafiltration membrane may have an average pore size in a range between approximately 50 and 200 nm.
  • Benefits from subjecting the stream of water to an ultrafilteration process in second filtration unit 110 after adsorption unit 108, may include not only preventing an increase in microbial contamination of the stream of water being treated but also separating most of contaminations caused by the adsorption beds in adsorption unit 108 including micron-, submicron- or nano-sized particles of the adsorbent materials, especially for activated carbon adsorbents.
  • Final product stream 116 may be a water stream free from suspended particles, detergents, fat/grease, microorganisms, adsorbent particles, unwanted color, and unwanted odor that may be ready to be reused in the domestic or industrial water systems.
  • FIG. 2 illustrates a box diagram of gray water treatment system 100, according to one or more embodiments of the present disclosure.
  • first filtration unit 106 may generate first permeat stream 114 and a first retentate stream 202.
  • first retentate stream 202 may be recycled back to mixing tank 102 in order to avoid accumulation in first filtration unit 106.
  • second filtration unit 110 may generate a second permeat stream 206 and a second retentate stream 208.
  • second retentate stream 208 may be recycled back into adsorption unit 108 in order to avoid accumulation in second filtration unit 110
  • treatment system 100 may further include a back-wash stream 204 which may be configured to recycle a protion of the final
  • Back-wash stream 204 may be used for washing filter modules disposed within first filtration unit 106 and second filtration unit 110 to remove formed filter cakes in the aforementioned filter modules.
  • back-wash stream 204 may be used to feed back a portion of the treated water into first filtration module 106 and second filtration module 110 in a period of approximately 3 to 60 seconds.
  • back-wash stream 204 may have a pressure between approximately 0.5 and 5 bars.
  • first retentate stream 202 and second retentate stream 208 may be closed, which is discussed in subsequent paragraphs of this disclosure.
  • FIG. 3 illustrates a schematic of a gray water treatment plant 300, according to one or more embodiments of the present disclosure.
  • Gray water treatment plant 300 may be configured as an implementation of treatment system 100 of FIGs. 1 and 2.
  • gray water treatment plant 300 may include a mixing/flocculating tank 302 for receiving a gray water discharge from a gray water feed line 304 and selectively subjecting the received gray water discharge to a flocculation process.
  • mixing/flocculating tank 302 may further include a mixing mechanism 306, for example a mechanical mixer that may be utilized with a mixing rate of approximately 100 to 200 rpm or a blower with a power of approximately 1 to 3 hp.
  • Mixing mechanism 306 may be utilized to mix the gray water with a flocculant such as FeCh, FeS0 4 , Al 2 (S0 4 ) 3 , and mixtures thereof. According to an embodiment, after mixing/flocculating tank 302 is filled with gray water received from gray water feed line 304, a relatively small amount of the flocculant, for example about 50 mgL 1 to about 200 mgL 1 may be added to mixing/flocculating tank 302, then mixing mechanism 306 may be utilized for mixing the gray water and the added flocculant.
  • a flocculant such as FeCh, FeS0 4 , Al 2 (S0 4 ) 3 , and mixtures thereof.
  • a flocculant such as FeCh, FeS0 4 , Al 2 (S0 4 ) 3 , and mixtures thereof.
  • a relatively small amount of the flocculant for example about 50 mgL 1 to about 200 mgL 1 may be added to mixing/flocculating tank 302, then mixing mechanism 306 may be utilized for mixing
  • mixing/flocculating tank 302 may further be equiped with a sludge disposal system 310 that may be utilized for discharging sludge from mixing/flocculating tank 302 1 to 5 times a day.
  • gray water treatment plant 300 may further include a first filteration unit 312 that may include a microfiltration module 314 disposed within a microfiltration tank 316.
  • microfiltration tank 316 may be fed with mixed and/or flocculated gray water stream 308 from mixing/flocculating tank 302 by a first pump 318.
  • microfiltration module 314 may include at least one microfiltration membrane.
  • microfiltration module 314 may include a number of microfiltration membranes 320 with a plate-and-frame arrangement fed from microfiltration tank 316 and generating a first permeate stream 322 and a first retentate stream 324.
  • FIG. 5 illustrates a microfiltration module 500, according to an exemplary embodiment of the present disclosure.
  • Microfiltration module 500 may include a plurality of microfiltration membranes 502 arranged in a plate-and-frame arrangement. Plurality of microfiltration membranes 502 may be fed from line 504. Referring to FIGs. 3 and 5, in an embodiment, line 504 may be in fluid communication with mixed and/or flocculated gray water stream 308. Received gray water may be sprayed above plurality of microfiltration membranes 502 as shown in FIG. 5. Benefits from spraying the gray water over microfiltration membranes 502 may include washing down any possible cakes formed on surfaces of microfiltration membranes 502. It should be understood that microfiltration module 314 may be similar to microfiltration module 500.
  • first retentate stream 324 that may include suspended particles, detergents, fat/grease, and microorganisms separated from the gray water by microfiltration module 314 may be recycled back to mixing/flocculating tank 302.
  • gray water treatment plant 300 may further include a microfiltration pump 326 that may provide the required driving force for microfiltration process.
  • microfiltration pump 326 may be a vacuum pump capable of providing a pressure difference between approximately 0.4 bar to approximately 0.6 bar to create a flow of water through mocrofiltration membranes.
  • microfiltration pump 326 may be in fluid communication with first permeate stream 322.
  • first retentate stream 324 may be controled by a first retentate valve 328.
  • microfiltration tank 316 may be an open tank with atmospheric pressure, which may be utilized with a level control system (not explicitly shown in FIG. 3)
  • gray water treatment plant 300 may further include an adsorption unit 330 that may be configured for removing any unwanted odors and colors from first permeate stream 322 which may be fed to adsorption unit 330 by microfiltration pump 326.
  • adsorption unit 330 may include at least one adsorbent bed 334 that may be filled with an adsorbent material such as activated carbon for removing unwanted odors and colors. It should be understood that other adsorbents for removing heavy metals from the gray water stream may also be utilized in adsorption unit 330.
  • gray water treatment plant 300 may further include a second filteration unit 336 that may include an ultrafiltration module 338 disposed within an ultrafiltration tank 340.
  • ultrafiltration tank 340 may be fed with a discharge stream 342 from adsorption unit 330.
  • ultrafiltration module 338 may include at least one ultrafiltration membrane.
  • ultrafiltration module 338 may include a number of ultrafiltration membranes 344 with a plate-and-frame arrangement fed from ultrafiltration tank 340 and generating a second permeate stream 346 and a second retentate stream 348.
  • ultrafiltration module 338 may be configured similar to microfiltration module 500 of FIG.
  • gray water treatment plant 300 may further include an ultrafiltration pump 350 that may provide the required driving force for ultrafiltration process.
  • ultrafiltration pump 350 may be a vacuum pump capable of providing a pressure difference between approximately 0.4 bar to approximately 0.6 bar.
  • ultrafiltration pump 350 may be in fluid communication with second permeate stream 346.
  • second retentate stream 348 may be controled by a second retentate valve 352, which may be a directional valve.
  • ultrafiltration tank 340 may be an open tank with atmospheric pressure, which may be utilized with a level control system (which is not explicitly shown in FIG. 3).
  • gray water treatment plant 300 may further include a product tank 354 for storing the treated water received from second filtration unit 336 via second permeate stream 346.
  • a portion of the treated water may be fed back to first filtration unit 312 and second filtration unit 336 as a back-wash stream 356.
  • back-wash stream 356 may be separated into a first back-wash stream 358 and a second back-wash stream 360.
  • First back-wash stream 358 may be connected to first permeat stream 322 and may be controled by a first back-wash valve 362 and a first valve 332.
  • second back-wash stream 360 may be connected to second permeate stream 346 and controled by a second back-wash valve 364 and a second valve 370.
  • back wash pump 368 may be utilized to recycle a portion of the treated water as back-wash stream 356
  • back-wash pump 368 may provide first and second back-wash streams 358, 360 for periods of approximately 3 to 60 seconds in between filteration processes in first permeate stream 332 and second permeate stream 346.
  • first back-wash valve 362 and second back wash valve 364 are open feeding the back-wash stream back into microfiltration module 314 and ultrafiltration module 344, while first valve 332 and second valve 370 are closed.
  • first back-wash stream 358 may be fed back to microfiltration module 314 via first permeate stream 322 and washed down impurities from microfiltration module 314, while second back-wash stream 360 may be fed back to ultrafiltration module 344 via second permeate stream 346 and wash down impurities from ultrafiltration module 344.
  • filtration processes in first filtration unit 312 and second filtration unit 336 may be adjusted by level of gray water in microfiltration tank 316.
  • microfiltration tank 316 may be equiped with a level control mechanism that continuously measures the level of gray water in microfiltration tank 316 between an upper limit and a lower limit, the filtration process goes on as long as the water level in microfiltration tank 316 is between the upper limit and the lower limit.
  • FIG. 4 illustrates a flowchart 400 of operations in gray water treatment plant 300, according to an exemplary embodiment of the present disclosure.
  • system checks the water level in mixing/flocculation tank 302 (block 402) then makes a decision based on the level of water in mixing/flocculation tank
  • microfiltration tank 312 If mixing/flocculation tank 302 is full, the system will fill microfiltration tank 312 by turning on first pump 318 (block 406). After filling microfiltration tank 312, the system checks the level of water in microfiltration tank 312 (block 408), while the water level in microfiltration tank 312 is between an upper limit and a lower limit, the system starts and keeps the filtration process on by turning on microfiltration and ultrafiltration pumps 326, 350 (blocks 410 and 412).
  • microfiltration tank 312 When microfiltration tank 312 is empty, the system turns the filtration off by turning off microfiltration and ultrafiltration pumps 326, 350 (block 414), then the system turns the back-wash process on by turning on back-wash pump 368 for a predetermined period (block 418) provided that mixing/flocculation tank 302 is full (block 415). After the back-wash process, the system again restarts filling the microfiltration tank 312. When the system detects that mixing/flocculation tank 302 is empty it starts to refill the mixing/flocculation tank 302 by gray water feed line 304 (block 416).

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

Abstract

L'invention concerne un système de traitement d'eau grise qui peut comprendre au moins un réservoir de mélange relié à une évacuation d'eau grise, une première unité de filtration comprenant au moins une membrane de microfiltration, l'eau grise provenant du ou des réservoirs de mélange pouvant être amenée à la première unité de filtration et la première unité de filtration pouvant générer un premier perméat et un premier rétentat. Le système de traitement d'eau grise peut en outre comprendre une unité d'adsorption comprenant au moins un lit adsorbant rempli d'un matériau adsorbant, le premier perméat provenant de la première unité de filtration pouvant être alimenté à l'unité d'adsorption, et une seconde unité de filtration comprenant au moins une membrane d'ultrafiltration, une évacuation de l'unité d'adsorption pouvant être fournie à la seconde unité de filtration et la seconde unité de filtration pouvant générer un second perméat et un second rétentat.
PCT/IB2018/055885 2018-08-04 2018-08-04 Système de traitement d'eau grise WO2020030943A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3915669A1 (fr) * 2020-05-26 2021-12-01 Gem Innovations Srl Dispositif de filtration pour filtrer un fluide et procédé de filtrage d'un fluide
WO2022083071A1 (fr) * 2020-10-22 2022-04-28 麦王环境技术股份有限公司 Dispositif et procédé d'épuration en profondeur des eaux usées organiques non dégradables
FR3119618A1 (fr) 2021-02-10 2022-08-12 Inovaya Unité de traitement d’eau comprenant plusieurs dispositifs de filtration

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6203705B1 (en) * 1999-10-22 2001-03-20 Koch Microelectronic Service Company, Inc. Process for treating waste water containing copper
US20110094963A1 (en) * 2007-08-07 2011-04-28 Kurita Water Industries, Ltd. Membrane separation method and membrane separation device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6203705B1 (en) * 1999-10-22 2001-03-20 Koch Microelectronic Service Company, Inc. Process for treating waste water containing copper
US20110094963A1 (en) * 2007-08-07 2011-04-28 Kurita Water Industries, Ltd. Membrane separation method and membrane separation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3915669A1 (fr) * 2020-05-26 2021-12-01 Gem Innovations Srl Dispositif de filtration pour filtrer un fluide et procédé de filtrage d'un fluide
WO2021239847A1 (fr) * 2020-05-26 2021-12-02 Gem Innovations Srl Dispositif de filtration destiné à la filtration d'un fluide et procédé destiné à la filtration d'un fluide
WO2022083071A1 (fr) * 2020-10-22 2022-04-28 麦王环境技术股份有限公司 Dispositif et procédé d'épuration en profondeur des eaux usées organiques non dégradables
FR3119618A1 (fr) 2021-02-10 2022-08-12 Inovaya Unité de traitement d’eau comprenant plusieurs dispositifs de filtration
WO2022171718A1 (fr) 2021-02-10 2022-08-18 Inovaya Unité de traitement d'eau comprenant plusieurs dispositifs de filtration

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