WO2002036248A1 - Filtering device having a cylindrical first filter surrounding a membrane filtration unit - Google Patents

Filtering device having a cylindrical first filter surrounding a membrane filtration unit Download PDF

Info

Publication number
WO2002036248A1
WO2002036248A1 PCT/NL2001/000790 NL0100790W WO0236248A1 WO 2002036248 A1 WO2002036248 A1 WO 2002036248A1 NL 0100790 W NL0100790 W NL 0100790W WO 0236248 A1 WO0236248 A1 WO 0236248A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filtering device
cfl
activated carbon
membrane filtration
Prior art date
Application number
PCT/NL2001/000790
Other languages
French (fr)
Inventor
Johan Jan Scharstuhl
Eric Scharstuhl
Original Assignee
Prime Water Systems Gmbh
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 Prime Water Systems Gmbh filed Critical Prime Water Systems Gmbh
Priority to AU2002224197A priority Critical patent/AU2002224197A1/en
Publication of WO2002036248A1 publication Critical patent/WO2002036248A1/en

Links

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
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • 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
    • B01D63/02—Hollow fibre modules
    • B01D63/024—Hollow fibre modules with a single potted end
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/48—Antimicrobial properties
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

Definitions

  • Filtering device having a cylindrical first filter surrounding a membrane filtration unit
  • the invention relates to a filtering device with the objective to provide conditions for the simultaneous elimination of microorganisms and the removal of dissolved organic and other contaminants from drinking water, under low-pressure conditions.
  • the invention relates more particularly to a filtering device according to the preamble of claim 1.
  • Such filtering devices are known from the patent applications US-A-4, 636,307, WO91/05600 and EP 364 111.
  • the known filtering devices comprise a housing having an inlet and an outlet connection. Inside said housing, an at least approximately cylindrical body is disposed in which an adsorption agent is provided, which cylindrical body with adsorbent forms the first filter. At the top side of this body there is an inlet for the liquid to be filtered. Above a bottom portion, the body is provided with a hollow core, while the top section of said bottom portion bordering the hollow core at the lower side is, provided with an outlet for the liquid.
  • the activated carbon adsorbent is provided between the two cylinder walls and in the bottom part and, when in use, the liquid to be filtered flows through it.
  • the filtration module with hollow fibres is disposed inside the hollow core. After the liquid is dis- charged through the outlet of the first filter, it will flow through the wall of the hollow fibres, thereby carrying out a subsequent filtering phase.
  • the hollow fibres have an open end through which the filtered liquid is able to reach the outlet connection of the filtering devices.
  • the drawback of the known filtering device is that the liquid has to travel a long way through the first filter, and that only an inlet and outlet of a limited size are available.
  • the hollow fibres in use have a hydrophobic (water repellent) surface structure, and the result of
  • M filtering phase provide a large filtering surface with an exceptionally good filtering capacity.
  • the membrane filtration module comprises a module housing surrounding the capil- lary membranes
  • the module housing preferably comprises a perforated tube. The liquid filtered by the first filter and exiting from the inner wall of the first filter will, via perforations provided in the module housing, quickly reach the capillary membranes for a fastest possible pas- sage through the filtering device.
  • the module housing is, in a preferred embodiment of the filtering device, at least for the most part not in contact with the inner shell of the first filter that surrounds the cavity.
  • the membrane filtration module is provided with hydrophilic capillary membranes.
  • hydrophilic capillary membranes Although the above-described embodiment affords an excellent solution for the removal of sediment, dissolved organic substances and microorganisms from water intended for the production of drinking water, it should be considered that the microorganisms that are still alive and that during the filtration process have collected in the space formed by the cylindrical hollow core and the module shell, have the tendency to grow through the membrane wall, especially under oligotropic conditions.
  • a further preferred embodiment proposes the use of water- insoluble biocidal N-Halamine polymers such as, for example, described by S.D. orley et al. in Trends in Polymer Science, Vol. 4, No. 11 of November 1996.
  • biocidal polymers have been shown to be able to kill microorganisms present in water, but are in practice not easily put to use.
  • a carrier material For an efficient utilization it is necessary for a carrier material to be impregnated with the granular biocidal N-Halamine polymer.
  • This is preferably a membrane S whose pore structure and size can be adapted to the size of the microorganisms, in order to provide sufficient opportunity for contact and enough time to render the microorganisms innocuous.
  • Suitable carriers are membranes on the basis of cellulose, glass fibre, pes/pvp and zirconium oxide, as described in EP 0 624 283 Bl and in WO 00/29101.
  • the flat membrane produced with the aforementioned materials is to this end wound once or several times like a layer around the perfo- rated module shell.
  • the water that has passed the charcoal block will now first flow through the biocidal membrane before exiting the filtering device via the capillary membranes and the outlet connection.
  • the biocidal polymer in the membrane By contacting the biocidal polymer in the membrane, the microorganisms are killed and will no longer be able to proliferate, or form a danger of growing through.
  • the biocidal polymer is incorporated in the surface structure of the capillary filtration membrane as described in WO 00/29101.
  • FIG. 1 shows a longitudinal section through an embodiment of the filtering device according to the invention
  • Figure 2 shows an enlarged top view of the longitudinal section of Figure 1;
  • FIG. 3 shows a cross section through the fil- tering device according to Figure 1;
  • FIG. 5 shows a cross section of the filtering device according to Figure 4.
  • the filtering device according to the invention shown in the figures comprises a housing in the form of a beaker 10 with a screw lid 11.
  • an O-ring (not indicated but visible in the Figures 1 and 2) is provided between the lid 11 and the beaker 10.
  • the lid 11 is ⁇ O t t H H t ⁇ o u. o t ⁇ o Ul
  • any air collected in the hollow core 21 can easily escape via the block 20 and the filter 40 to the vent 50, and extremely hydrophilic membranes 32 that are very permeable to the liquid to be filtered may be used in the filtering device.
  • a further preferred embodiment is shown in Figure
  • the Figures 4 and 5 substantially correspond to the Figures 2 and 3, on the understanding that the perforated shell 31 is provided with a membrane layer 60.
  • This membrane layers 60 is provided with a water-insoluble, preferably granular biocidal polymer. In this way any remaining microorganisms in the water to be treated will be killed so that they will no longer be able to proliferate or be likely to grow through.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Water Treatment By Sorption (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to a filtering device, comprised of a housing (10) with an inlet (1) and an outlet (2) connection, an exchangeable, substantially cylindrical activated carbon first filter (20) connected to the inlet connection (1), with a hollow core (21) extening along the cylinder axis, accommodating a membrane filtration module (30) that is connected to the outlet connection (2), the first filter (20) and the membrane filtration module (30) being connected in series, and the filtration module (30) comprising a bundle of capillary filtration membranes (32) whose open ends are connected to the outlet connection (2). The outer cylinder shell of the first filter (20) forms an inlet, and the inner shell of the first filter (20) surrounding the hollow core (21), forms an outlet for the first filter (20). The first filter (20) comprises a block of activated carbon. The membrane filtration module (30) comprises a module housing (31) surrounding the capillary membranes (32), embodied as a perforated tube accommodated in, and for the most part without contacting the hollow core (21) of the first filter (2). Around the block of activated carbon (20) a felt-like filter (40) is provided as a first filtering stage. The perforated shell (31) is provided with a membrane layer (60) comprising a water-insoluble biocidal polymer. The capillary membranes (32) may also be provided with a water-insoluble polymer.

Description

Filtering device having a cylindrical first filter surrounding a membrane filtration unit
The invention relates to a filtering device with the objective to provide conditions for the simultaneous elimination of microorganisms and the removal of dissolved organic and other contaminants from drinking water, under low-pressure conditions.
To this end the invention relates more particularly to a filtering device according to the preamble of claim 1.
Such filtering devices are known from the patent applications US-A-4, 636,307, WO91/05600 and EP 364 111. The known filtering devices comprise a housing having an inlet and an outlet connection. Inside said housing, an at least approximately cylindrical body is disposed in which an adsorption agent is provided, which cylindrical body with adsorbent forms the first filter. At the top side of this body there is an inlet for the liquid to be filtered. Above a bottom portion, the body is provided with a hollow core, while the top section of said bottom portion bordering the hollow core at the lower side is, provided with an outlet for the liquid. The activated carbon adsorbent is provided between the two cylinder walls and in the bottom part and, when in use, the liquid to be filtered flows through it. The filtration module with hollow fibres is disposed inside the hollow core. After the liquid is dis- charged through the outlet of the first filter, it will flow through the wall of the hollow fibres, thereby carrying out a subsequent filtering phase. The hollow fibres have an open end through which the filtered liquid is able to reach the outlet connection of the filtering devices. The drawback of the known filtering device is that the liquid has to travel a long way through the first filter, and that only an inlet and outlet of a limited size are available. The hollow fibres in use have a hydrophobic (water repellent) surface structure, and the result of
Figure imgf000004_0001
^ -^ H 3 SD o r+ 3 rr SD Ω rt rr Hi rt H- rt tr Ω H rr O H H 0 H rt μ- <J SD a rt -s Hi μ- rt
Ω Φ φ 13 H tr Φ O Ω O τr τr H- t 13 tr ■< (D Φ tr (^ Φ μ- c o tr 13 μ- tr H φ tr O CO tr
»< 3 α a ιQ Φ rt rr 3 φ h-1 Φ <! Φ a TJ CO φ H Ω l-1 rt S-. Φ Ω o SD μ- l-i Φ o H- SD SD ι-i μ- TJ O rt H Φ H SD H- rt rt rt H1 13 rt φ <! s: « Ω t3 CO
H- < Ω o 3 SD I-1 Φ <! l-i H- C Φ Φ 13 Ω o Ω co Hi μ- φ Φ a μ- tr Φ σ tr rt φ φ
3 φ H- Ω- H- Ω CO 3 SD H- .3 ιQ H Hi ft o TJ H- rt H- μ- O l-i rt μ- 13 (D O • SD tr φ a α 3 o Ω rf O r co <J tr O H- 13 13- rt SD -J 13 13 φ 13 H rt Hi Ω a Φ a Ω f-i Φ c H- Hi < Φ Φ Φ SD H O Hi H- • 13 rt a Hi iQ Φ ι-3 ? Φ φ o
H- Hi CO l-i CO <. l-i Φ α CO 3 ft Ω Φ 13 H- I-1 Ω Φ SD TJ O rt rt rt O ω rt Hi » a
Ω l-i *% > e SD O rr tr Ω H iQ M- H- φ H Φ μ- H rt " tr tr H3 H μ- &
SD o XT rr H 3 (D Ω SD H- Φ O 13 Φ H- β Ω CO H- 3 H C0 tr φ φ ft o tr SD o μ-
3 51) SD Cfl Φ 3 (D O Hi H CU CO l-i H- 13 S3 TJ r Φ SD tr Hi Φ Ω rt <! 13
— 3 r+ a s: s: H σ 13 C Hi α SD ω SD Ω SD o ιQ Ω Φ SD tr 13 o - μ- rtφ φ Φ f+ a co SD SD SD H- σ H H- μ- •< rt rt SD Ω 13- 13 σ Φ Ω a C H- ω ft O Cfl l-i l-i a σ tr o 3 Ω rr a o o H- rt H .3 TJ U H- TJ U H a a SD rt 13 tr tr μ-
--1 Φ t Ω SD TJ Φ Φ 3 Ω O V CO ιQ H rt SD O H- H- Φ Φ Cfl μ- Φ Hi <i rt Φ a φ (0 -J. Hi 13 rt Hi o Φ TJ Φ H H H - r Φ rt Φ o rt 13 I-1 Φ a <l tr Ω μ- μ- tr H 3 Φ l-i ιQ tr (D
Ω s: &) φ CO tr Φ . H H- Ω ι-i rt Hi H1 <i C H- o S3 rt H rt Φ 3 a Λ' Ω O φ Ω
? o> <! 03 » o Hi SD tfl o -^ H O Φ SD H- O SD Φ Ω Ω l-i o CO ^ Ω φ 13 rt 3 a rt rr ^ rr -3 φ 13 Hi SD Φ H- l-i TJ rt Hi H a Φ Φ rt SD rt μ- ^ 13 rt o φ Hi o ιQ Φ H- s: H iQ rt H 3 H rt H TJ >< ^* a φ l-i Hi SD -3 --1 rt tr s: O SD < μ- ι-i
(3 H 3 Ω i-r H- φ t SD SD 1 ft t φ I-1 U rt SD H -> Hi H 3 μ- μ- Φ 13 Hi μ- l-i CO
0- • Φ H- H- CO Φ SD Ω Ω O φ Φ • SD tr 3 ≤: Ω Ω rt O μ- o φ 13 o iQ Ω CO
K r+ a Ω a o rt rt rt P- H . CO Φ φ tr o Ω Hi O € {-• S3 H a 13 μ- Hi rt Φ φ rt μ-
0) 0) Φ tT Ω Hi H- Φ H- • H- φ 3 H- 13 o I-1 rt 13 Φ Φ 13 μ- tr 13 co
-3 Ω O tr Φ σ <5 l-i 3 13 g (D HY o* Ω O H o rt- ft Φ a CO H a < --■ Φ Φ rt Hi rf rt co SD o 3 O ^ SD H- φ o" H- H 13- H- a s: tr tr H tr Φ rt l-S O μ- rt
Φ H- *>* &) H to Q H rr ISl -3 φ o CO --■ SD a μ- Φ H • ft φ ω μ- 13 Φ μ- (D --■ IT
Φ <! 3 Φ Φ O iQ 3 Φ Φ rt 13 O- H- rt 13 H- φ 13 TJ o tr l-1 ir 13 rt H 13 I-1 tr rt SD ω 0) Φ α 13 a SD Φ α α rt H- 3 Φ Φ CQ r-i iQ (D Ω β H Φ φ μ- μ- <l φ Φ rt rt H H- -3 SD O H- 3 TJ H CO SD ft •<: iQ 13 l-1 rt o 13 φ (D l-i
SD Φ ιQ 3* Φ CO 3 H- 3 Ω H- Hi O Φ I-1 H- . TJ σ rt 13- tr Ω o M tr 13 iQ 13 TJ CO SD a . Φ CO Φ Ω CO £D -3 13 13 φ 13 SD l-1 O . μ- ft ^ Hi Φ rt TJ S3 SD
Ω H J Ω -3 H rt rt ιQ l-i * 13 rt tr I-1 o TJ a μ- --■ H, -3 tr
O Ω σ O 3" rr Ω o cr rt τr Ω rt rt H a tr μ- μ- rt Hi TJ H Φ O μ- Hi a μ-
-3 SD Φ H- -3 ** O Hi o --T Φ rt o O a Hi H SD i-r 13 Φ φ co 13 tr K O <! 13 Ω μ- ιT-i ω H SD Ω O r+ 3 13 SD -3- Hi 13 φ s-; ^ 3 Φ H a φ rt Φ <! μ- (D Ω tr tr
H- tr a H- P- -- rt TJ SD • rt Hi Φ CO <! H a ft Hi . Φ tr SD μ- Ω μ- rt μ- o a o a σ SD tr O a H- ft rt H- rt a μ- -3- SD μ- (D H Hi φ 9 a φ cn μ- φ l-1 TJ φ 3 SD φ rt Φ β CO ι-3 ct --■ Ω t H Ω tr S3 SD 3 φ ? H ^< μ- o" Φ -> o 13 H l-i .3 O Φ -3 o U \τr ft SD φ S3 Φ Φ φ < μ- CO (D ι-i Hi H CO rt 13 rt o φ
SD H- a ^ H- Ω a H Φ Φ Φ <1 Ω H tr φ Ω co rt rt s CO μ- Φ H O ≤ CO tr 3 Hi -3 o O TJ l-i H- Φ rt SD ft H- 13 o IT μ- rt H SD Φ O >< Cfl
Ω H O 3 rt SD Hi rt H- Ω SD o ^Q rt 13 Hi Φ CO CO Hi H Hi Hi £ φ rr o Φ H SD TJ SD H- (--,. SD ^ Ω O Ω a 13- μ- Hi ≤: μ- ^ Hi rt Ω Hi Φ Φ φ μ- H tr TJ CO a o -3 O <5 l-i Ω tr 13 O <i rt O μ- 1 - μj μ- tr μ- H 3 Cfl Hi cr φ
H φ TJ H- SD a CO a P SD CO Ω Φ SD H SD - - rt 13 ιQ μ- rt μ- Hi I-1 Hi ED μj l-i o S3 Hi φ φ a H- μ- .3 rt O 13 SU a -3 Φ 13- C Ω φ Λ o rt μ- H rt Φ <J Ω Φ Φ a
(ϊ Hi H c tr rt rt .-— , I-1- ft H ft iQ 13 H- rt l-i rt l-i ΪT H S3 H Φ SD Φ a φ tr Ω CO μ- φ o Φ SD H- H- -- rr SD Hi sx Φ φ a 13 SD C o tr SD μ- 3 H rt Ω H rt Hl
3 H Ω ω a O o Φ ιQ H- H- 13 SD ιQ ιQ CO (3 φ rt ≤: H- a Cfl Φ rt μ- rt rt w μ- μ- Hi rt 3 SD .3 .3 SD H- Φ 13 £-- σ H- Φ Φ ιQ μ- H- 3 Cfl h Φ 13 O tr <i 3 φ
H- 3 Hi rt < CO rt ι£5 CO CO rt U Hi o I-1 , rt rt S3 H iQ φ Hi φ l-i
O O l-i (D r+ o •< O Φ Φ O O O TJ H 13 M SD o tr H Hi μ- μ- ^ o φ
3 H. σ o O H SD Hi H rr Hi Hi o Φ 1 O N a H 13 Φ cr O rr rt s: o H a H Φ Φ 1 a Ω (D 3 rr Φ I-1 tr Hi Φ μ- Φ 3 a 1 Φ Φ φ Φ 1 1 Cfl l-i
Figure imgf000005_0001
H- SD !-■ σ μ- Ω SD rt tr Ω Hi Ω o Hi <! 3 o o φ rt¬ ω o SD Ω rt <l 3 fl (D () rt¬ Ω < £D SD
3 Ω μ- o 3 M O Φ {-• O μ- O <! SD φ • • H tr 3 Hi 3 o ir o φ 3 CO tr tr SD --■ 3 a rt ^ a ιQ O H o ■ 3 Φ O 3 tg o Q" φ tr a SD SD 3 CD TJ σ H SD rt Cfl a
Φ μ- Φ μ- ιQ rt μ- a £ --
T rt trl-i < rt1 --> o CO to rt l-i 3 Φ o (D O 3 Φ o
K 3 a ιQ O 3 K Φ SD SD l-i "3 a SD φ φ rt¬ SD CO H a 3 3 a SD
SD Hi φ Φ Φ ιQ μ- H 3 rt H ιQ SD T3 3^ μ- μ- -a a tr TJ ft tr Hi CO ιQ Φ 3 tr
SD rt μ- 3 <! a TJ o to μ- ir Φ Φ 3 J3 φ a 3 μ- SD SD tr o --1 φ 3J Ω o to
* Φ --■ rt μ- H TJ Hi φ μ- 3 Φ CO Φ a Φ 3 rtH Φ φ Hi 3 Hi SD l-i o μ- a rt Ω (D Φ tr co 3 SD μ- o Cfl • o o 3 Φ rt ^ O o Hi rt Hi H Φ l-S co φ H φ 3 SD SD rt H σ to Hi H SD Hi rt 3 SD μ- TJ Ω H3 3 H 1 * o tr TJ
• Ω H rt 3 ■ a Φ O Ω SD SD Φ H) H rt s: D fl H rt 3 Ω s: l-i SD ir CO Cfl Φ H o Φ rt
SD • tr 3 Φ rt a O SD Cfl μ- 3 3 rt¬ ^ t-1 μ- o CO Φ • ir 3 3 3 Hi μ-
H K φ SD rt rt μ- Hi TJ rt Ω 3 3 Φ I-1 3 tr . — . φ φ --■ TJ rt o TJ SD SD Hi o tr tr o O TJ < μ- l-i sS 3" Ω Ω H rt μ- φ SD 3 tx CO l-1 φ H- tr --■ TJ Ω rt μ- Φ 3 φ o TJ Hi Ω rtH SD H φ μ- Φ Φ tr rt H Ω TJ Ω 3 a o rt μ- 3 Ω
3 rt μ- O Ω tr Φ rt Cfl Hi rt tr O SD H Ω CO φ rt 3 rt ιQ o μ- l-i μ- o rt Ω
CO ** μ- K 3 O Φ Ω Φ rt φ tr --■ SD tr Φ Hi o SD rt rt TJ ir o μ- ** Ω 3 rt <1 3 rt¬ μ- CD rt o CO < 3 Φ a K μ- 3 --■ Ω SD μ- Hi TJ μ- O rt SD rt φ ^ ιQ μ- SD tr TJ ι-i rt 3 rt Φ CO tr a Hi l-i H -T! a o o 3 --■ μ- μ- H1 μ- rt ** CO CO 3 rt o Φ Φ SD μ- tr SD 3 μ- l-1 μ- Ω μ- φ Φ 3 Ω 3 rt μj --■ I-1 SD o μ- o rt¬ iQ Φ Ω Ω
TJ φ Hi μ- a o 3 SD {-• a {-• μ- Ω T Φ Φ H rt l-1 TJ 3 3 o o 3 Hi tr a Ω ιQ rt¬ μ-
CO l-1 μ- Φ Φ Ω iQ l-i rt (D a o Cfl Hi SD ι-i SD Hi TJ SD μ- f-i Hi rt Φ 3 3 H tr rt
Hi ^ --■ 3 l-i tr Φ Φ rt 3 Ω Hi rt SD H 3 H I-1 iQ Φ SD 3 Ω ι-i (D SD <<
Hi o rt rt SD rt¬ o ι-i μ- rt to r μ- I-1 φ μ- rt ^ H O {-• tr O tr H Ω ιQ μ- SD to 3 3 o N φ --■ tr O tr 3 μ- <! O Φ Cfl o Ω O μ- rt >. • rt 3 \-> μ- rt H rt H . 3 O
H a μ- ι-i > l-1 Hi Φ 3 o Φ -a IQ rt 3 o Hi ir μ- o 3 μ- SD tr s: Hi
3 CO ιQ μ- ^ ιQ a tr 3 rt ιQ μ- 3 μ- φ 3 Φ Ω ^ Ω ιQ <1 3 μ- o ι-3 SD μ- φ N 3 CD SD tr € μ- ^ Φ Φ tr Φ <1 3 μj l-i SD H ? SD 3 3 3 tr rt rt rta H SD iQ 3 Φ Ω tr TJ 3 3 (D a Φ Φ 3 rt rt Hi o rt to O rt H • φ Φ " tr
-3 ιQ a X rt o μ- tr φ I-1 Hi rt rt H Φ H Hi Φ Φ vQ O H Φ Φ rt a φ tr 3 1 TJ rt μ- Ω Ω SD 3 SD μ- h-1 M TJ Q" 3 (D μ- h-1 Ω 3 a ω * 1-3 rt
>< 3 Hi tr Φ Φ < tr CO rt H --■ * rt φ l-i H Q rt •< rt rt SD D Φ Φ tr μ- o " Hi μ- o SD Hi 3 SD φ ιQ rt " Cfl Φ SD H μ- rt μ- ir 3 IX Ω Φ -Q l-l Φ μ- rt 3 {-• CO Hi a rt o Hi O Φ φ Φ Cfl I-1 3 SD o H I-1 <J φ h-1 3 rt SD Hi Hi 3 H ir ιQ a φ μ- Φ Hi o TJ Hi H φ H μ- Φ 3 3 SD φ Φ Hi ι-i H O μ- σ μ- TJ 3 Cfl
Φ Φ Ω rt a H H TJ φ CO Φ -a 3 to Φ rt 1 Hi Cfl SD 3 tr H --■ \-> a o Cfl rt
TJ a μ- μ- r SD 3 o rtSD a to 3 μ- Cfl 3 μ- TJ μ- ω Ω Cfl o rt o ≤: 3
Hi SD co φ Φ Ω Ω CO <! tr l-i ≤ μ- 3 .----. Φ o en H --1 φ rt μ- 3 Φ Φ Ω μ- a CD Hi o H SD 3 SD rt μ- φ rt μ- o μ- Ω SD 3 ^-^ 3 3 Φ rt H 3 o X H ? to Φ t-1 μ-
SD l-i Hi rt -> l-i μ- SD a μ- co Hi l-1 ? H TJ 3 ϋ* - I-1 l-i H 3 3 SD μ- H -1 a o o --■ μ- tr 3 Φ Hi Ω l-1 << TJ H μ- 3 μ- SD a Φ SD 3 3 3 Hi ^ rt
CO S3 H * Hi o SD a μ- I-1 3 SD ^< rt SD co - — 3 rt φ a *< TJ ιQ CD o Hi φ
Φ 3 3 Φ 3 rt SD φ o tr • Hi O rt 3 μ- μ- υa > [-• ^ H o CD H o a Φ H Φ a SD rt O H TJ Φ μ- O Φ TJ μ- 3 o H μ- a σ φ a Ω H TJ •
Hi a Φ o Hi a a K φ *. Φ H --=- --■ SD Cfl o Cfl SD 3 φ 3 a Φ •» Φ SD φ 3 TJ s: rt SD Hi l-i μ- o H Φ SD rt TJ SD to H φ μ- <1 I-1 a ^ -• TI O μ- tr σ I-1 o Ω rt S3 μ- rtO CO Hi l-i TJ TJ rt to TJ ^ 3 ^ rt rt Hi μ- μ- to μ- μ-
(3 rt Φ ^ μ- rt 3 SD μ- 3 3 tr φ Cfl a 3 SD H TJ ir μ- H φ tr μ- o Cfl Ω o rt s: Φ --■
Ω 3* N ir H o a ιQ φ l-i 3 Φ H ft O l-i SD σ O Hi 3 ω μ- o K φ O μ- a rt tr tr SD SD Φ tr tr 3 μ- H Ω rt μ- ? o rt --■ <! μ- ø" tr co 3 3 H tr rt H rt I-1 tr Φ o SD rt¬ a Hi o Φ l-i ir o μ- IX Φ μ- i-1 H φ SD Φ φ Φ Hi " SD SD
SD ^ o Hi Hi Ω 3 tr Φ μ- 3 Φ Φ 3 3 μ- 3 a rt SD a s: a 3 s: t-1 Ω rt
Φ Ω Φ Φ μ- o Φ K CO a SD H SD 3 SD Φ t. 3 SD a tr 3 O ≤ rt μ-
Hi ? l-1 -' 3 to Hi μ- CO l-1 K O rt rt SD •< μ- a SD Φ Ω ^ Hi tr φ Φ ω -r μ- o μ- Ω rt Φ rt μ- S3 μ- Ω rt ^< o Φ SD " Φ rt rt rt ω 3^ SD * H H φ μ- 1 3
H ^ o 1 3 φ 3 Ω I-1 Φ TJ a Φ I-1 Φ tr 3^ μ- ^ (D SD 1 φ Φ a Ω O l-1 Hi 1 H iQ tr 1 μ- 1 ^ Φ o H H a tr tr μ- rt1 1 3 • 3 1 Φ ^ co
M filtering phase provide a large filtering surface with an exceptionally good filtering capacity.
In an embodiment wherein the membrane filtration module comprises a module housing surrounding the capil- lary membranes, the module housing preferably comprises a perforated tube. The liquid filtered by the first filter and exiting from the inner wall of the first filter will, via perforations provided in the module housing, quickly reach the capillary membranes for a fastest possible pas- sage through the filtering device.
In order to avoid the formation of any obstruction for liquid exiting from the inner wall of the first filter, the module housing is, in a preferred embodiment of the filtering device, at least for the most part not in contact with the inner shell of the first filter that surrounds the cavity.
In accordance with a preferred embodiment of the invention, the membrane filtration module is provided with hydrophilic capillary membranes. Although the above-described embodiment affords an excellent solution for the removal of sediment, dissolved organic substances and microorganisms from water intended for the production of drinking water, it should be considered that the microorganisms that are still alive and that during the filtration process have collected in the space formed by the cylindrical hollow core and the module shell, have the tendency to grow through the membrane wall, especially under oligotropic conditions.
In order to render said microorganisms innocuous, a further preferred embodiment proposes the use of water- insoluble biocidal N-Halamine polymers such as, for example, described by S.D. orley et al. in Trends in Polymer Science, Vol. 4, No. 11 of November 1996. Such biocidal polymers have been shown to be able to kill microorganisms present in water, but are in practice not easily put to use.
For an efficient utilization it is necessary for a carrier material to be impregnated with the granular biocidal N-Halamine polymer. This is preferably a membrane S whose pore structure and size can be adapted to the size of the microorganisms, in order to provide sufficient opportunity for contact and enough time to render the microorganisms innocuous. Suitable carriers are membranes on the basis of cellulose, glass fibre, pes/pvp and zirconium oxide, as described in EP 0 624 283 Bl and in WO 00/29101.
According to the invention, the flat membrane produced with the aforementioned materials is to this end wound once or several times like a layer around the perfo- rated module shell. The water that has passed the charcoal block will now first flow through the biocidal membrane before exiting the filtering device via the capillary membranes and the outlet connection. By contacting the biocidal polymer in the membrane, the microorganisms are killed and will no longer be able to proliferate, or form a danger of growing through.
In an alternative embodiment, the biocidal polymer is incorporated in the surface structure of the capillary filtration membrane as described in WO 00/29101. In the following the invention will be elucidated with reference to the appended drawing, in which identical reference numbers refer to similar components, and in which:
- Figure 1 shows a longitudinal section through an embodiment of the filtering device according to the invention;
- Figure 2 shows an enlarged top view of the longitudinal section of Figure 1;
- Figure 3 shows a cross section through the fil- tering device according to Figure 1;
- Figure 4 shows a further preferred embodiment; and
- Figure 5 shows a cross section of the filtering device according to Figure 4. The filtering device according to the invention shown in the figures comprises a housing in the form of a beaker 10 with a screw lid 11. In order to seal, an O-ring (not indicated but visible in the Figures 1 and 2) is provided between the lid 11 and the beaker 10. The lid 11 is ω O t t H H tπ o u. o tπ o Ul
TJ t-> TJ IT rt Hi Hi 3" ir tr rt rt 3 rt μ- Hi 3 s: Ω σ μ- SD μ- s: a rt Hi CO <! TJ to rt <! rt TJ
H μ- 3 o 3 o o o H O O SD tr O o 31 o l-1 3 \-> 3 μ- μ- μ- o μ- 3 H 3 φ 3 μ- H
O • H 3 Φ H H 3 CD TJ 3 ^ φ H H a μ- H o Hi O ιQ rt Hi φ H 3 rt o TJ ι-i rt O O
Φ TJ to Φ rtto a 3 CD (D 3 Ω SD Φ Ω O O tr Hi Cfl rt Φ < TJ . Φ 3 < μ- O μ- 3 tr Φ μ- Φ φ Φ Φ σ SD H rt tr 3 ;v H to Φ • φ Φ a μ- O a μ- a H, CO 3 Φ X 3 H Cfl 3 3 Φ TJ ^ Φ φ a > Ω SD Φ (D H tx H a H HI to a
Φ μ- Φ ιQ rt¬ K SD ιQ a a TJ a Φ o Φ SD Φ H SD μ- Ω Φ rt tr Ω • Φ
CO
«* a tr 3 CO O 3 Hi CO X CD Hi 3 TJ H 3 tr 3 3 3 a Φ φ 3 a rt • co φ Φ T co CO fO rtrt μ- μ- μ- 3 o rt rt Φ SD μ- φ ft φ TJ Q H a H H φ l-1 ** tr ir Ω Ω O H Φ SD 3 Ω 3 μ- -~ tr X tr tr 3 X r H l-i Ω o φ SD φ Φ H SD rt a μ- 3 3 rt rt Ω t-1 rt t ιQ 3 t-1 SD φ O O μ- 3 t-- O Cfl μ- tr o O 3" o SD x l-i ^ o rt l-i 3 cn Cfl a tr rt o μ- Hi CD Ω ^ H 3 rt 3 O 3 μ- rt μ- it-. 3 Hi SD a 3 tr φ Ω 1 μ- SD μ- CO φ rt μ- 3 t 3 h-1 o ^ ft tr μ- Ω a tr
Ω o 3 K μ- μ- a μ- CD SD o rt φ SD a tr <i ιQ CO it) σι ι-i Φ μ- μ- Φ <-r rt ι r to Φ tr a rt¬ Ω Φ 3 Ω SD l-i TJ o 3 μ- Ω Φ μ- rt φ SD Ω H <! 3 X tr (D o SD
3 tr O a rt tr rt φ μ- H O CO Ω 3 O rt μ- O CD TJ Φ ω CD rt CD rt o rt3 μ- SD rt φ SD α tr o 3 tr o rt rt TJ tr Φ rt Hi Φ H 3 • rt o H rt H tr Hi μ- tr
CO a tr CO CO Φ Ω rt o l-1 3 Hi Φ Ώ tr O o a Cfl SD O φ Φ H 3 φ SD co Φ μ-
Φ φ 3 3 1 tr TJ SD I-1 3 l-1 ^ Φ rt rtI-1 <! 3 > a a to 3 μ- rtSD 3
O φ tr Ω > Ω o φ φ H rt rt Φ l-1 o ω rt¬ rt Ω Φ tr μ- μ- rt rt Φ μ- SD 3 Ω TJ tr
TJ o tr ■g H 3" SD to μ- 3 "< l-S tr g a 3" SD tr O SD 3 φ 3 a Ω H O "< Hi SD ct l-i Φ Φ rt Hi O"
•* O n TJ Φ l-i * SD Φ Q" O SD o μ- Φ 3 H rt iQ Φ t rt 3 3 o rt μ- O CD rt μ- o H Ω rt¬ ^ μ- CO 3 Hi l-i h-1 rt a tr H- tr a ) tr H rt tr H <. <1 r
O Ω CD ?*r tr oo rt 1-1 Φ μ- Hi SD •«* Φ o H Φ tr O Φ Ω rt SD μ- Φ Ω
3 Hi 3 SD <-o o O 3 M --> μ- 3 a o tr μ- rt 3 Φ O -J μ- O o 3 Φ tr rt a l-i O
CD o Φ M ft c-n SD Hi TJ ø" rt H Φ μ- X 0 a ir Ω 3 3 tr 3 O 3 TJ 3 Φ Φ Φ 3
H o o H CD H K rt CO 3 -1 Φ K) Ω μ- 1 o TJ ^ H φ a a 3
Hi 3 rt¬ cπ ^ Φ a SD (D Φ to H3 a I-" H1 o ^ co tr SD rt TJ rt o 3 tr o Φ
^ Φ o SD tr -J rt3 a 3 rt i-i CO μ- tr o o -1 σ t Φ rt SD μ- tr a rt o Ω SD • Ω
X SD a 3 φ CO 3 tr a μ- Φ μ- μ- h a φ l-i 33 Φ μ- μ- o TJ rt CO O l-i 3 Φ 3 rt SD O rt
N (D Ω 3 a . φ Φ rt CO o 3 Φ Φ tr SD Cfl 3 H s: φ 3 ft μ- Ω ro rt ι-i SD μ- μ- 3 rt I-1 Cfl 3 Φ μ- 3 ιQ μ- 3 Ω CD IT- a CD o Φ 3 N Ω φ ) O tr Ω o ιQ TJ μ- Φ rt SD HI & to o CO Cfl o o r O ω Φ TJ φ 3 < Φ O 3 Φ 0 a ^ 3 o o Ω 3
N <! tr 3 tr H TJ c! 3 tV> 3 a H, a H1 H H H l-i a μ- 3 μ- μ- SD 3 3 3 ^
CD φ SD co φ φ φ SD SD φ φ Φ TJ 3 Φ CD o a 3 a *< rtTJ tr t SD TJ ι-> iQ ** cϊ o 3 Ω a CD 3 < H H SD H1 <1 SD SD Φ rt¬ ιQ Φ tr o ^ CO 3 to o μ-
1 Φ ** rt μ- TJ φ Φ a rtH o* μ- o tr Φ to Ω O μ- IX a tr •» 3 Φ CO • a o 3 3 SD
Hi TJ a o co (D CO Φ tr φ H Ω <! μ- 3 h-1 φ a μ- O φ H μ- Φ 3 Φ a 3
O o SD TJ Ω tr a Φ SD φ μ- Ω CO Φ . 3 :τ Φ Cfl φ tr 3 μ- rtto l-i a Φ CO rt Hi 3 l-i a
--" I-" Ω H μ- ? O Φ Ω 3 •^ a tr o g rt SD a SD Φ a tr o 3 3 O O rt μ- a "< SD CO CO 3 μ- N> rt μ- Ω I-1 Φ Φ ø' H O M rt ir-t φ 3 rt 3 Ω TJ H Ω SD
Φ φ l-i O μ- Ω 3 X 3 SD O to rt a SD Ω H μ- ≤: rt μ- s: φ tr a o to tr 3 O 3 3 a Cfl tr a o ιQ (D Φ TJ CO • tr O SD 3 CD μ- " 3 φ rt tr Φ to CO Cfl Hi
** I-1 rt o Hi Φ H ω Φ SD μ- φ φ tr 3 3 iQ rt Φ ιQ φ \-> o co o tr μ- o
Φ 3 O TJ CO 3 a D 3 TJ Φ Ω tr 3 rt ) o Ω H TJ Hi H a 3 3 tr 3 rt H l-i o o φ a 3 rt 3 Φ 3 H tr φ Ω h tr Ω o TJ φ o Φ l-1 rt
3* to Hi H SD φ rt¬ Φ SD SD φ TJ a μ- Hi o 3 SD μ- SD φ s: - 3 rt Ω Ω Ω Cfl Hi o
Φ Hi o Co CD H* tr p3 l-i 3 rt 3 Φ t-1 co μ- co rt (-• a 3 μ- TJ μ- μ- SD - O φ μ- Ω Φ μ- Φ rt¬ rt μ- Ω Φ Q ^ a 3" tr 3 Φ φ Cfl H IT μ- vQ rt rt t o o Hi to co 3 I-1 l-i ? rt
Hi cr SD SD tr Φ 3 H H Φ H a Cfl rt μ- o 3 Φ 3 O tr o Cfl 3 μ- ft Hi CO
O H I-1 φ a ιQ μ- 3 SD 3 SD μ- SD μ- o μ 3 H a TJ TJ φ Ω μ- o •<: 1 ft O Ω
Φ Hi μ- tr O 3 φ rt H 3 3 Hi (D SD Cn iQ H H H1 TJ SD H a TJ 3 3 Hi Hi O a O φ 3 3 tr Φ a Φ 3 Φ ιQ rt o μ- CO Φ Cfl Φ ι-i rt- ιQ μ- Hi 3
CO ιQ o Φ ~J a 3 1 rt tr O Ω TJ μ- tr ≤: Ω . H μ- TJ ω o O μ- ^ SD ω μ- SD 3 μ- rt a 1 ^ tr o O SD φ o o CD a 3 rt Hi TJ o Ω Ω Φ
CΛ 1 3 μ- φ Φ O 3 TJ H 3 H Ω ω Φ 3 rt 1 rt Ω co μ- 1 IV) 1 1 Φ l-i μ- μ- 1
Φ ι-i 1 1 1 1 1
ω ) t t H >->
Ul 0 cπ 0 Ul 0 Ul
Ω rt¬ TJ SD rt3 μ- ω rttr rt¬ rt Φ rt a Ω ■J-- O SD μ- 3 3 TJ Ω tr rt Hi Hi rt μ- Hi rt^ l-i
O tr 3 tr 0 --■ φ tr 3 tr μ- tr 3 O μ- tr 0 Hi Ω 03 Φ 3 3 Φ H μ- μ- tr 3 CD μ- tr μ- 3 φ Φ a Φ a I-- Λ Φ rt φ -a 3 a Ω 3 rt Ω 03 3 3 3 μ- --■ --■ φ iQ ft ιQ φ ιQ 3 h-« rt 3 SD 3 3 Cfl TJ 3 H 3 rtμ- N rt rt Ω ?τ- a rt rt Φ 3 3 3
Φ l-1 Φ < Ω --> H Φ 3 TJ μ- 3 3 --" Ω 3 tr <! μ- μ- Φ tr Φ ιQ Φ Φ TJ TJ a H Hi H μ-
Ω μ- (-' μ- ID Φ * 3 0 μ- φ a 0 TJ CO (D O a Φ 3 ιQ O σ 3 Φ H Φ H ι-i 3 tr Φ μ- φ 3 rt -a ^ SD TJ rt a 03 i-i Hi to H SD rt N 3 Φ φ Φ l-i CD Ω CO H ιQ
Φ 3 μ- CO Hi --■ 3 μ- Hi μ- μ- --" X tr Φ 3 3 to 03 ■I-- a TJ CO 3 03 CO a μ- tr rt \-> 0 μ- ^< tr O to rt 3 rt rt μ- Φ a ιQ I-1 Hi rt μ- 0 3 O " 0 φ H Ω rt • T a * H tr I-1 • Φ H ir O O tr M 3 1 • Φ σ . 3 ^ Ω Cfl tr O 3
SD a 3 Φ ID rt TJ Φ 3 rtφ rt --■ ?τ* Ω Hi a 3 TJ Hi tr μ- rt¬ φ TJ 0 3 Hi r-3 H μ- X H H ι-3 H Φ tr rt- tr tr rtrt¬ 0 Φ 3 O t-3 H l—1 rtrt ω tr H 3 CO μ- tr CD
H μ- 0 rt 0 "< tr SD 3 0 μ- μ- Φ Hi φ tr tr Ω 3 H l-i tr μ- μ- ^< tr Φ 3 •» SD 0 φ μ- H μ- I-1
--1 TJ tr 3 Φ ft Φ 3 3 0 3 μ- Φ Φ W H tr a φ 3 3 Φ l-i Cfl rt Hi Ω t ω rt 03 I-1 μ- --■ tr Φ rt 3 μ- rt CO 3 h tr H 0 Φ rt ιQ 3 Hi φ 0 rt φ Φ
03 H- --■ φ t-1 0 i-i μ- ■^ CO SD O 0 μ- Ω t μ- O 3 a t-' O 3 <! rt¬ 3 O X H a • 03 H Hi
•* --■
3 r-> Φ Φ 3 μ- 3 CD 3 μ- tr rt --■ 3 * O <! μ- 3 a SD tr H H 0 φ μ- ^ μ-
0 μ- 3 rt tr -a rt ιQ iQ μ- --• 3 l-1 • φ SD ro CD Λ rtTJ H Φ Φ 3 3 3 ι-3 0 1— ■ X tr rt¬ Ω 0 H 3 3 Φ 3 3 Φ Hi 0 Φ μ- 3 CD H 3 tr T -a μ- Φ I-1 0 KQ tr Hi X rt μ-
0 0 Ω 3 μ- Φ CO H μ- s: H 3 ω <! a 0 μ- Φ 3 0 \-> -V !X rl-> a φ tr φ rt
X tr 3 a O 3 a t Φ rt¬ t-1 a "< μ- μ- 3 a μ- μ- 3 μ- 3 3 μ- rt¬ ω μ- l-i tr φ Φ Φ μ- 3 Φ cT tr tr μ- rt Ω 03 φ SD rt3 3 Hi Ω Ω CO a 0 3 Ω 3 tr Hi 3 Ω
<! o X H H rt g- 3 3 t to Φ SD Φ O tr i-i rt¬ tr CO φ μ- μ- tr J-. rt¬
Φ SD Φ Φ μ- SD O 0 — ' a rt μ- SD ? X TJ {-• iQ
H H φ tr μ- Φ μ- tr (-j rt I-1 Ω H1 3 --• 0 a 0 tr l-i tr H 3 Ω CO I-' 3 3 ^ 3 rt. Φ SD Φ rt a rt Φ rt μ. •<. O Φ lΩ. TJ tr rt μ- Φ
H1 CD rt rt rv> Φ ιQ H O tr t-1 Cfl H1 Φ tr 3 φ 0 3 rt " CD I-1 φ Hi 3 Hi
Φ 3 μ- CO tr Φ SD a Φ ^ t μ- CO μ- Φ H 3 H TJ tr O 3 H 0 H μ- O Ω
SD Φ ω O SD I-1 SD 3 3 K H1 O co tr Ω tHi Ω --■ rt¬ l-i ^ tr rt Cfl tr 3 3 Φ CO rt a r μ- Φ O SD SD TJ rt
Ω a --■ tr O Hi 0 • : tr Ω 3 3 3 03 SD Ω μ- ?^ it-. rt tr 3
O 0 a SD (V) tr tr φ μ- 3 O K --1 φ •< O iQ rt¬ O Φ Ω rt¬ Ω 0 φ φ CO μ-
Φ CO X t φ <1 0 Hi rt¬ rtrt μ- I-1 -" X tr <1 3 tr T O tr h-1 0 l-i 3
TJ t 3 • Hi Φ 0 rt¬ μ- 3" Ω rttr tr Φ 3 •« tr μ- to a φ φ rt Φ Φ a φ φ Hi μ- φ CD rt c 3 a
3 • "* μ- Hi 3 tr 3 O μ- tr rt Φ φ O a 0 3 Φ CA Φ H 3 Cfl to -f φ
0 03 3 rt¬ Φ Φ a
3 a φ ir rt H μ- 3 a 3 <! l-1 3 03 O Ω CD 0 σ* Hi l-i to > 3 SD tr rt¬ rtO 3 Φ Ω μ- rt 03 Φ H μ- μ- Hi O 0 a tr Hi Ω 3 O μ- a μ- to --1 Φ tr & 3 tr μ- l-1 tr tr μ- J Ω μ- H O Ω -a 0 Hi 3 3 3 3 H rt SD a l-i 3 μ- rti-s Φ t-1 φ l-i φ Φ 3 0 Ω SD Λ O 3 X 3 3 φ 3 H 3 rt H 0 μ- CO 3 μ- to X
Hi tr ^ Hi SD 3 ιQ 3 r H 3 to -• μ- ιQ 3 3 μ- rtCO Cfl Φ Ω 3 <! 3 a 3 rt μ-
Hi φ tr μ- μ- 3 3 -r 0 Φ (-■ (D Ω μ- 03 !-• IX a <! a Ω tr Ω ; r a 0 (D TJ φ 03
3 3 0) < --• φ Φ H TJ CO 3 O ι-i O a μ- 0 t-1 rtμ- μ- h-1 Φ H μ- SD rtrf TJ rt¬ 3 Hi
CO 3 tr μ- rt SD Φ h-1 1 X Ω 3 tr 3 tr co rtSD rt Φ φ H1 μ- --■ tr Φ tr rt μ- CD φ Φ tr 3 3 Φ ! s: 3 3 l-i O X rt TJ SD tr O 3 Hi X H-' 3 φ a φ Φ I—1 CO
3 SD ι-< l-i SD Φ . -. SD 0 SD μ- Φ Φ SD rt- 3 Φ rt¬ 3 μ- φ Φ t¬ μ- SD O σ 3 03 rt rt 0* Φ a r tr 3 3 0 t-> tr H Cfl 3 tr tr μ- --■ l a a SD t-1 I-1 Ω φ tr tr Φ l a
O H Cf Φ tr 3 3 0 O Φ H M TJ Cf μ- a Hi φ φ 3 rt 0 μ- CD 3 0 l-i Φ
3 Φ tO Φ CO rt rt Cfl Φ tr 0 3 O Cfl μ- tQ Φ Hi μ- Hi Ω trtt rt -a H rt 0 X μ- TJ rt¬ 3 TJ 0 μ- O to rt --■ Ω r rt¬ μ- Hi H l-i 3 μ- ? 3 tr SD Ω 3 3 μ- tr Φ H Hi i-s a Hi Hi ^ O μ- en t 0 fV tr tr φ 3' Ω tr rt 3 H- O μ- O {—• μ- 0 H ? ιQ Ω
Φ Φ Φ μ- 3 3 0 H1 Ω Φ --■ μ- 0 φ Φ t-> --■ ι-i 3 3 rtrtr to a 3 ^ μ- rt
X Cfl Ω 0 <! rt¬ 3 a ^ Λ t 3 I-1 ω 3 H Φ rt ιQ tr Φ 0 0 3 TJ Φ
O 3 Φ 0 TJ μ- rt tr 3 φ μ- rt O TJ TJ tr rt φ Hi rt¬ Φ H • rt to Hi Hi tr a
3 (-■ 3 3 Φ Ω ι-i Φ a 3 Ω O rt K) tr Φ μ- Hi H H J-- 1-. O t¬ CD rt I-1 rt O a tr 0 0 μ- r
1 3 Φ SD a CD tr O 3 Φ H 3 μ- μ- 0 Ω Φ H Φ Φ 3 Ω CΛ *« --■ 3 tr O μ- ω • rt Ω to rt- H φ 3 TJ I-1 Cfl Ω O a < H 3 3 tr rt Ω Φ φ 3 μ- μ- φ <! μ- SD 3 0 Φ Φ 3 a SD Φ rt rt Φ t*r rt 3 H μ- rt H Ω φ Hi Φ rt a 3 3 μ- 0 TJ tr Hi a a SD 3 tr 3 tr φ a tr 1 Φ Ω . 1 tr O H μ- 0 φ 3 3 3 1 1 *» Ω 1 φ H 0 SD 1 Φ H 1 1 Hi
•< to tr a
Φ Hi rt 3
a via the block of activated carbon 20 and the filter 40, after which the air can be released from the filtering device via a conventional vent connection 50. When, as in the present invention, a block of activated carbon 20 and a filter 40 are used as first filter, any air collected in the hollow core 21 can easily escape via the block 20 and the filter 40 to the vent 50, and extremely hydrophilic membranes 32 that are very permeable to the liquid to be filtered may be used in the filtering device. A further preferred embodiment is shown in Figure
4 and Figure 5.
The Figures 4 and 5 substantially correspond to the Figures 2 and 3, on the understanding that the perforated shell 31 is provided with a membrane layer 60. -This membrane layers 60 is provided with a water-insoluble, preferably granular biocidal polymer. In this way any remaining microorganisms in the water to be treated will be killed so that they will no longer be able to proliferate or be likely to grow through.
The embodiment of the filtering device described above must not be understood as a limitation of the invention. It is possible to realize various embodiments within the scope of the invention and the appended claims.

Claims

1. A filtering device, comprised of a housing with an inlet and an outlet connection, an exchangeable, substantially cylindrical activated carbon first filter connected to the inlet connection, with a hollow core ex- tending along the cylinder axis, accommodating a membrane filtration module that is connected to the outlet connection, the first filter and the membrane filtration module being connected in series, and the filtration module comprising a bundle of capillary filtration membranes whose open ends are connected to the outlet connection, characterized in that the outer cylinder shell of the first filter (20, 40) forms an inlet, and the inner shell of the first filter (20, 40) surrounding the hollow core (21), forms an outlet for the first filter (20, 40) .
2. A filtering device according to claim 1, characterized in that the first filter (20, 40) comprises a block of activated carbon (20) .
3. A filtering device according to claim 2, characterized in that the activated carbon is chosen from a type that is capable of adsorbing organic substances and metals.
4. A filtering device according to claim 2, characterized in that the first filter (20, 40) comprises a first filtering phase (40) provided around the block of activated carbon (20) , forming a supplementary filtering phase preceding the block of activated carbon (20) .
5. A filtering device according to claim 1, characterized in that the same comprises a perforated module housing (31) that is accommodated in the hollow core (21) of the first filter (20, 40) .
6. A filtering device according to claim 5, characterized in that the module housing (31) comprises a membrane filtration module.
7. A filtering device according to claim 6, characterized in that the membrane filtration module is provided with hydrophilic capillary membranes.
8. A filtering device according to one of the preceding claims, characterized in that the perforated module housing (31) is provided with a membrane layer
(60), which is provided with a water-insoluble biocidal polymer.
9. A filtering device according to one of the preceding claims, characterized in that the hydrophilic capillary membranes are provided with a water-insoluble biocidal polymer.
PCT/NL2001/000790 2000-10-26 2001-10-26 Filtering device having a cylindrical first filter surrounding a membrane filtration unit WO2002036248A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002224197A AU2002224197A1 (en) 2000-10-26 2001-10-26 Filtering device having a cylindrical first filter surrounding a membrane filtration unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1016486 2000-10-26
NL1016486A NL1016486C2 (en) 2000-10-26 2000-10-26 Filter device with a cylindrical pre-filter around a filtration membrane module.

Publications (1)

Publication Number Publication Date
WO2002036248A1 true WO2002036248A1 (en) 2002-05-10

Family

ID=19772305

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2001/000790 WO2002036248A1 (en) 2000-10-26 2001-10-26 Filtering device having a cylindrical first filter surrounding a membrane filtration unit

Country Status (3)

Country Link
AU (1) AU2002224197A1 (en)
NL (1) NL1016486C2 (en)
WO (1) WO2002036248A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003041847A1 (en) 2001-11-15 2003-05-22 Norit Holding N.V. Filter module
WO2011147656A1 (en) * 2010-05-24 2011-12-01 Unilever Nv Water purification device
US8158405B2 (en) 2008-06-30 2012-04-17 General Electric Company Process for concentrating and processing fluid samples
US8546127B2 (en) 2008-06-30 2013-10-01 General Electric Company Bacteria/RNA extraction device
CN103435170A (en) * 2013-08-20 2013-12-11 翟志国 Household purifier
EP2730545A1 (en) * 2012-11-12 2014-05-14 Whirlpool Corporation Multi-stage fluid filter assembly with filtration membrane
JPWO2013129227A1 (en) * 2012-02-29 2015-07-30 三菱レイヨン株式会社 Filtration device
US9314716B2 (en) 2012-11-12 2016-04-19 Whirlpool Corporation Customizable multi-stage water treatment assembly
US9320993B2 (en) 2012-11-12 2016-04-26 Whirlpool Corporation Filter housing for small media
US9327216B2 (en) 2012-11-12 2016-05-03 Whirlpool Corporation Customizable multi-stage water treatment system
US9889478B2 (en) 2012-11-12 2018-02-13 Whirlpool Corporation Consumable descaling cartridges for a refrigerator appliance
JP2020521627A (en) * 2017-05-27 2020-07-27 佛山市云米電器科技有限公司Ｆｏｓｈａｎ Ｖｉｏｍｉ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． Improved filter core structure
JP2020521626A (en) * 2017-05-27 2020-07-27 佛山市云米電器科技有限公司Ｆｏｓｈａｎ Ｖｉｏｍｉ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． Filter core water flow passage
GR1009994B (en) * 2020-01-17 2021-05-06 Σταυρος Νικολαου Γουσγουνελης Water-filtering system with multiple filtering levels and utilisations

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364111A1 (en) * 1988-09-20 1990-04-18 Kabushiki Kaisha Aiaishi Water purifier
WO1991005600A1 (en) * 1989-10-17 1991-05-02 Cuno Incorporated Filter device with radial and axial flow subassemblies
US5102542A (en) * 1990-01-25 1992-04-07 Electrolux Water Systems, Inc. Construction of canister-type filters
EP0617951A2 (en) * 1993-03-31 1994-10-05 Tomey Technology Corporation Portable liquid purifying device
JPH08117764A (en) * 1994-10-19 1996-05-14 Zojirushi Corp Water purifier
JPH08173773A (en) * 1994-12-26 1996-07-09 Mitsubishi Rayon Co Ltd Hollow fiber membrane module
JPH09150043A (en) * 1995-11-27 1997-06-10 Nok Corp Filtering cartridge and filter
WO1998057726A1 (en) * 1997-06-17 1998-12-23 Microban Products Company Antimicrobial filter cartridge
JPH11151484A (en) * 1997-11-19 1999-06-08 Mitsubishi Rayon Co Ltd Filter cartridge
WO2000020093A1 (en) * 1998-10-08 2000-04-13 Cuno Incorporated Fluid filtration unit
WO2000029101A1 (en) * 1998-11-16 2000-05-25 Prime Membrane Technologies Nv Microporous flat, capillary or tubular membrane and method of manufacturing the same
WO2000068151A2 (en) * 1999-05-06 2000-11-16 Innova Pure Water Inc. Personal water filter bottle system
WO2001007151A2 (en) * 1999-07-27 2001-02-01 Prime Water Systems Gmbh Filtering device comprising a cylindrical first filter around a filtration membrane module

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364111A1 (en) * 1988-09-20 1990-04-18 Kabushiki Kaisha Aiaishi Water purifier
WO1991005600A1 (en) * 1989-10-17 1991-05-02 Cuno Incorporated Filter device with radial and axial flow subassemblies
US5102542A (en) * 1990-01-25 1992-04-07 Electrolux Water Systems, Inc. Construction of canister-type filters
EP0617951A2 (en) * 1993-03-31 1994-10-05 Tomey Technology Corporation Portable liquid purifying device
JPH08117764A (en) * 1994-10-19 1996-05-14 Zojirushi Corp Water purifier
JPH08173773A (en) * 1994-12-26 1996-07-09 Mitsubishi Rayon Co Ltd Hollow fiber membrane module
JPH09150043A (en) * 1995-11-27 1997-06-10 Nok Corp Filtering cartridge and filter
WO1998057726A1 (en) * 1997-06-17 1998-12-23 Microban Products Company Antimicrobial filter cartridge
JPH11151484A (en) * 1997-11-19 1999-06-08 Mitsubishi Rayon Co Ltd Filter cartridge
WO2000020093A1 (en) * 1998-10-08 2000-04-13 Cuno Incorporated Fluid filtration unit
WO2000029101A1 (en) * 1998-11-16 2000-05-25 Prime Membrane Technologies Nv Microporous flat, capillary or tubular membrane and method of manufacturing the same
WO2000068151A2 (en) * 1999-05-06 2000-11-16 Innova Pure Water Inc. Personal water filter bottle system
WO2001007151A2 (en) * 1999-07-27 2001-02-01 Prime Water Systems Gmbh Filtering device comprising a cylindrical first filter around a filtration membrane module

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 1996-366115, XP002171519 *
DATABASE WPI Derwent World Patents Index; AN 1999-388795, XP002195318 *
DATABASE WPI Section Ch Derwent World Patents Index; Class D15, AN 1996-281498, XP002136065 *
DATABASE WPI Section Ch Derwent World Patents Index; Class D15, AN 1998-254292, XP002136063 *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 10 31 October 1997 (1997-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11 30 September 1999 (1999-09-30) *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003041847A1 (en) 2001-11-15 2003-05-22 Norit Holding N.V. Filter module
US8158405B2 (en) 2008-06-30 2012-04-17 General Electric Company Process for concentrating and processing fluid samples
US8546127B2 (en) 2008-06-30 2013-10-01 General Electric Company Bacteria/RNA extraction device
WO2011147656A1 (en) * 2010-05-24 2011-12-01 Unilever Nv Water purification device
JPWO2013129227A1 (en) * 2012-02-29 2015-07-30 三菱レイヨン株式会社 Filtration device
EP2730545A1 (en) * 2012-11-12 2014-05-14 Whirlpool Corporation Multi-stage fluid filter assembly with filtration membrane
US10759675B2 (en) 2012-11-12 2020-09-01 Whirlpool Corporation Customizable multi-stage water treatment system
US9314716B2 (en) 2012-11-12 2016-04-19 Whirlpool Corporation Customizable multi-stage water treatment assembly
US9320993B2 (en) 2012-11-12 2016-04-26 Whirlpool Corporation Filter housing for small media
US9327216B2 (en) 2012-11-12 2016-05-03 Whirlpool Corporation Customizable multi-stage water treatment system
US9889478B2 (en) 2012-11-12 2018-02-13 Whirlpool Corporation Consumable descaling cartridges for a refrigerator appliance
US10155669B2 (en) 2012-11-12 2018-12-18 Whirlpool Corporation Customizable multi-stage water treatment system
US11383990B2 (en) 2012-11-12 2022-07-12 Whirlpool Corporation Customizable multi-stage water treatment system
CN103435170A (en) * 2013-08-20 2013-12-11 翟志国 Household purifier
JP2020521626A (en) * 2017-05-27 2020-07-27 佛山市云米電器科技有限公司Ｆｏｓｈａｎ Ｖｉｏｍｉ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． Filter core water flow passage
JP2020521627A (en) * 2017-05-27 2020-07-27 佛山市云米電器科技有限公司Ｆｏｓｈａｎ Ｖｉｏｍｉ Ｅｌｅｃｔｒｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． Improved filter core structure
GR1009994B (en) * 2020-01-17 2021-05-06 Σταυρος Νικολαου Γουσγουνελης Water-filtering system with multiple filtering levels and utilisations

Also Published As

Publication number Publication date
AU2002224197A1 (en) 2002-05-15
NL1016486C2 (en) 2002-05-01

Similar Documents

Publication Publication Date Title
WO2002036248A1 (en) Filtering device having a cylindrical first filter surrounding a membrane filtration unit
EP0056054B1 (en) Water purification system
US5681463A (en) Portable liquid purifying device having activated carbon filter and micro-porous membrane filter
US4636307A (en) Hollow-fiber filtering module and water purification device utilizing it
US6454941B1 (en) Gravity-flow water filtration device
US9248391B2 (en) Vented filter cartridge for water treatment device
CA2286223C (en) Filter cartridge for gravity-fed water treatment devices
EP0797474B1 (en) Portable water purifying and drinking device
US9352252B2 (en) Water purification device
US6290847B1 (en) Gravity-flow water filtration device
WO2008067816A2 (en) Modular water purification unit
KR20100015483A (en) Filtration process using microporous filter with a low elution antimicrobial source
WO1991005600A1 (en) Filter device with radial and axial flow subassemblies
WO1990011812A1 (en) Gas separating and venting filter and method of making same
EP1235502B1 (en) Drinking straw
US6790365B2 (en) Process for adsorbing and removing endogenous cannabinoid
EP1204461B1 (en) Filtering device comprising a cylindrical first filter around a filtration membrane module
JPH04126799U (en) water purifier
CN210457774U (en) Tap water filtering and sterilizing integrated device
CN212403679U (en) Filter equipment is used in making wine
CN2675154Y (en) Sustained release evaporator possessing filtration device
JPH0648822U (en) Hollow fiber membrane module
KR880000940Y1 (en) A clean water device using filter module
RU2432980C2 (en) Filtration element and water cleaning filter
JPH02124169A (en) Blood treating device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP