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WO1997015378A1 - Revetement pour filtre bacterien - Google Patents

Revetement pour filtre bacterien Download PDF

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Publication number
WO1997015378A1
WO1997015378A1 PCT/EP1996/004670 EP9604670W WO9715378A1 WO 1997015378 A1 WO1997015378 A1 WO 1997015378A1 EP 9604670 W EP9604670 W EP 9604670W WO 9715378 A1 WO9715378 A1 WO 9715378A1
Authority
WO
WIPO (PCT)
Prior art keywords
biofilter
open
functional layer
layer
laminate
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP1996/004670
Other languages
German (de)
English (en)
Inventor
Ambrosius Bauer
Richard Leckenwalter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates GmbH
Original Assignee
WL Gore and Associates 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 WL Gore and Associates GmbH filed Critical WL Gore and Associates GmbH
Priority to AU74937/96A priority Critical patent/AU7493796A/en
Publication of WO1997015378A1 publication Critical patent/WO1997015378A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84—Biological processes
    • B01D53/85—Biological processes with gas-solid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B32B2329/04—Polyvinylalcohol
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the invention relates to an open biofilter for cleaning gas.
  • the "open" biofilter is often also referred to as a "bio bed", since the filter substrate is adjacent to the surrounding air over the entire area like a bed.
  • the filter substrate can be topsoil or any other material on which the microorganisms can settle.
  • “Closed” systems are characterized by a relatively complex structure, whereby the biofilter forms a system that is closed off from the environment.
  • Such closed biofilters are for example in the patents DE 42 35 591 AI and DE 42 29 767 AI and in
  • the open biofilters are of a very simple design and correspondingly inexpensive, but their functionality depends heavily on the weather and the operating condition of the biofilter. Because they are exposed to the environment, there can be wetting areas within the filter during intensive rainy periods. Such over-humidification
  • REPLACEMENT BLA ⁇ (RULE 26) hinders the air throughput and in particular also the exchange of substances with the active biological layer, so that the cleaning effect of the filter is reduced.
  • the organic filter substrate clumps and rots, so that replacement of the filter substrate is required relatively often.
  • JP 50 32 301 and JP 60 47 363 it is known from JP 50 32 301 and JP 60 47 363 to stack layers of garbage and earth through a laminate consisting of two supporting fabrics and a water-impermeable layer arranged between them but separate gas-permeable porous membrane from one another. This is to prevent rainwater from seeping into the garbage layers, which leads to anaerobic decomposition of the garbage and thus to the formation of more toxic and, in particular, combustible
  • the gas-permeable membranes allow gases and water vapor to escape, and an air supply installed under the landfill additionally supports the aerobic conversion of organic material to humus.
  • Soil remediation plants (DE-A-42 31 414). Compost rents and contaminated soil rentals have been covered there with such microporous membranes for a long time in order to create a favorable climate for the activity of the microorganisms.
  • the open biofilter thus becomes a closed biofilter.
  • the technology of the closed biofilter, in particular the moistening of the filter substrate is so complex and complicated that the mere use of a membrane in the open biofilter could not be promising, since in particular no technology has been able to offer the required values with regard to watertightness and air permeability.
  • the biofilter technology differs fundamentally from the above-mentioned landfills, composting and soil remediation plants in that it is not the filter substrate that is to be converted by the microorganisms, but rather only those gaseous substances that are removed from the gas flowing through the filter substrate should.
  • the object of the present invention is to improve the functionality of the open biofilter, to make it more independent of the weather and to increase its service life.
  • the open biofilter is covered with a cover, the cover comprising a functional layer preferably consisting of a permeable membrane, so that the cleaned air can pass through the permeable membrane while the Moisture is retained in the filter.
  • a cover comprising a functional layer preferably consisting of a permeable membrane, so that the cleaned air can pass through the permeable membrane while the Moisture is retained in the filter.
  • a microporosity of the functional layer the pore size of which is in the range from 1 to 10 ⁇ m, preferably 3 to 7 ⁇ m.
  • a membrane made of expanded polytetrafluoroethylene (ePTFE) with a pore size of 6 to 7 ⁇ m is particularly preferred.
  • the membrane can also consist, for example, of polyurethane, polyethylene or polypropylene.
  • a microporous tissue with the corresponding properties can optionally also be used.
  • the cover is designed as a laminate, which consists of the functional layer, ie preferably of the microporous membrane, and a carrier material.
  • the carrier material can be, for example, a fabric made of polyester, polypropylene or polyacrylic, which layer is connected and does not significantly impair the permeability of the laminate.
  • the microporous membrane is preferably arranged between two carrier materials, the carrier material exposed to the atmosphere should be weather-resistant and UV-resistant.
  • the laminate should be selected so that an air throughput of 600 to 1500 m 3 per hour per m 2 of laminate is possible without the biofilter function being impaired.
  • a cover consisting of a three-layer laminate (carrier material / functional layer / carrier material) then weighs approximately 200 to 500 g / m 2 .
  • Another positive effect is that no or very few odorous substances from the biofilter can get into the environment. In particular, almost no germs or spores are released.
  • Advantages are particularly valued in the case where the filter fails due to e.g. Cracking in the filter substrate or the like occurs.
  • the biofilter according to the invention with membrane cover has the general advantages of an open biofilter, namely large surfaces and low construction costs. Humidification of the organic material or the air, as is consistently provided in the closed systems, is not necessary in the biofilter according to the invention with a membrane cover.
  • the biofilter according to the invention forms an effective improvement of the open biofilter and an inexpensive alternative to the closed biofilter, in which the moisture of the biofilter is controlled by spraying systems and complex control technology.
  • the moisture of the open biofilter can be regulated in a simple manner by targeted condensation of moisture on the inside of the functional material.
  • Fi ⁇ g. 1 is a schematic PRESENTATI a biofilter in a
  • FIG. 2A shows a two-layer cover according to the invention for an open biofilter
  • FIG. 2B shows a three-layer cover according to the invention for an open biofilter.
  • FIG. 1 shows a schematic representation of a biofilter 1, to which contaminated air from a production hall 10 is fed.
  • the contaminated air is blown into a cavity 2 arranged under the filter substrate and then flows into the environment through the filter substrate 3 consisting of organic material.
  • the pollutants and odorants of the polluted air are largely absorbed and broken down by microorganisms that are in the organic material.
  • the cover 4 Before the air cleaned in this way flows out into the atmosphere, it must still pass through the cover 4, which in part almost completely prevents the escape of odor substances, residual pollutants or germs and spores and in particular reduces the escaping moisture to values to be set.
  • a cover 4 according to the invention which consists of a microporous membrane 5, which is on a permeable Carrier material 6 is laminated.
  • This two-layer cover 4 is arranged on the biofilter in such a way that the carrier material 6 points inwards towards the filter substrate. However, it could also point outwards to the atmosphere and would then be designated as the outer carrier layer with 6a.
  • a support layer 6, 6a on both sides of the membrane 5.
  • a biofilter with such a three-layer cover 4 is shown schematically.
  • the outward-facing, permeable carrier layer 6a protects the microporous membrane against the effects of weather and UV light.
  • Patents 3,953,566 and 4, 187,390 are described, likewise stretched PTFE which is provided with hydrophilic impregnating agents and / or layers, as described in US Pat. No. 4, 194,041, and breathable polyurethane layers; or else elastomers, such as copolyether esters and their laminates, as described in US Pat. Nos. 4,725,481 and 4,493,870.
  • the microporous polymeric material can be made by any known method from any polymeric material that is substantially water impermeable, i.e. under normal atmospheric conditions, no more than 5% by weight of water is absorbed, and is suitable for forming a functional layer film.
  • Polymers suitable for forming a microporous polymeric matrix include polyolefins such as polyethylene-polypropylene copolymers, polyethylene terephthalates, polycaprolactam, polyvinylidene fluoride, polybutylene terephthalate, polyester copolymers and polytetrafluoroethylene.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un filtre bactérien ouvert (1) muni d'un revêtement (4) composé d'un stratifié comportant au moins une couche fonctionnelle microporeuse et une couche porteuse sur laquelle la couche fonctionnelle est fixée. La couche fonctionnelle peut être une membrane en polytétrafluoréthylène expansé et la couche porteuse peut être appliquée des deux côtés de la couche fonctionnelle. La couche fonctionnelle ou le stratifié est perméable au gaz ou à l'air et imperméable à l'eau, de manière que l'ensemble de l'air sortant du filtre bactérien puisse passer à travers le stratifié, l'humidité étant retenue dans le filtre bactérien.
PCT/EP1996/004670 1995-10-27 1996-10-25 Revetement pour filtre bacterien Ceased WO1997015378A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74937/96A AU7493796A (en) 1995-10-27 1996-10-25 Biofilter cover

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540141 1995-10-27
DE19540141.7 1995-10-27

Publications (1)

Publication Number Publication Date
WO1997015378A1 true WO1997015378A1 (fr) 1997-05-01

Family

ID=7776000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/004670 Ceased WO1997015378A1 (fr) 1995-10-27 1996-10-25 Revetement pour filtre bacterien

Country Status (2)

Country Link
AU (1) AU7493796A (fr)
WO (1) WO1997015378A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001021394A1 (fr) * 1999-09-22 2001-03-29 W.L. Gore & Associates, Gmbh Couvercle pour le traitement aerobie de matiere biodegradable
EP2108437A1 (fr) * 2008-04-09 2009-10-14 Entsorga Italia S.R.L. Procédé et installation de biogaz de décharge et/ou la suppression de bio-aérosols via un système de bio-filtrage, et bio-filtre pour purifier des biogaz de décharge et/ou la suppression de bio-aérosols
ITTO20090756A1 (it) * 2009-10-05 2011-04-06 Entsorga Italia S R L Unità biofiltrante per l'abbattimento del biogas di discarica e/o di bioaerosols, ed impianto e processo per l'abbattimento del biogas di discarica e/o di bioaerosols mediante almeno una unità biofiltrante.
US7950388B2 (en) 2005-06-24 2011-05-31 Boehringer Ingelheim International Gmbh Nebuliser and container
CN109731485A (zh) * 2019-03-05 2019-05-10 湖州森诺氟材料科技有限公司 一种生物干化用聚四氟乙烯微孔膜及其制备方法
RU2831167C1 (ru) * 2023-12-27 2024-12-02 Игорь Викторович Торопов Укрывной полог для климатической камеры

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309496A1 (de) * 1983-03-17 1984-09-20 Feco GmbH, 2121 Deutsch Evern Filter-geraet zur regenerierung von abluft
EP0347407A1 (fr) * 1988-05-10 1989-12-20 Gerhard Dr. Dipl.-Ing. Fleischhacker Dispositif pour l'élimination de polluants ou d'odeurs contenus dans des gaz par filtrage biologique
DE4102167A1 (de) * 1991-01-25 1992-07-30 Isodra Isolierte Feindraehte G Verfahren zur biologischen behandlung von abgasen und einrichtung zur ausfuehrung des verfahrens
JPH0647363A (ja) * 1991-08-01 1994-02-22 Japan Gore Tex Inc 廃棄物の埋立て処理用遮水シート及びそれを用いる廃棄物の埋立て処理方法
DE4231414A1 (de) * 1992-09-19 1994-03-24 Ploucquet C F Gmbh Abdeckung für eine Kompostmiete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309496A1 (de) * 1983-03-17 1984-09-20 Feco GmbH, 2121 Deutsch Evern Filter-geraet zur regenerierung von abluft
EP0347407A1 (fr) * 1988-05-10 1989-12-20 Gerhard Dr. Dipl.-Ing. Fleischhacker Dispositif pour l'élimination de polluants ou d'odeurs contenus dans des gaz par filtrage biologique
DE4102167A1 (de) * 1991-01-25 1992-07-30 Isodra Isolierte Feindraehte G Verfahren zur biologischen behandlung von abgasen und einrichtung zur ausfuehrung des verfahrens
JPH0647363A (ja) * 1991-08-01 1994-02-22 Japan Gore Tex Inc 廃棄物の埋立て処理用遮水シート及びそれを用いる廃棄物の埋立て処理方法
DE4231414A1 (de) * 1992-09-19 1994-03-24 Ploucquet C F Gmbh Abdeckung für eine Kompostmiete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 276 (C - 1204) 26 May 1994 (1994-05-26) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001021394A1 (fr) * 1999-09-22 2001-03-29 W.L. Gore & Associates, Gmbh Couvercle pour le traitement aerobie de matiere biodegradable
AU778669B2 (en) * 1999-09-22 2004-12-16 W.L. Gore & Associates Gmbh Cover for aerobic treatment of biodegradable matter
EP1216145B2 (fr) † 1999-09-22 2011-10-26 W.L. Gore & Associates GmbH Couvercle pour le traitement aerobie de matiere biodegradable
US7950388B2 (en) 2005-06-24 2011-05-31 Boehringer Ingelheim International Gmbh Nebuliser and container
EP2108437A1 (fr) * 2008-04-09 2009-10-14 Entsorga Italia S.R.L. Procédé et installation de biogaz de décharge et/ou la suppression de bio-aérosols via un système de bio-filtrage, et bio-filtre pour purifier des biogaz de décharge et/ou la suppression de bio-aérosols
WO2009125306A1 (fr) * 2008-04-09 2009-10-15 Entsorga Italia S.R.L. Procédé et installation industrielle de purification de biogaz de décharge et/ou d'élimination de bioaérosols à travers un système de biofiltration, et biofiltre pour purifier un biogaz de décharge et/ou éliminer des bioaérosols
ITTO20090756A1 (it) * 2009-10-05 2011-04-06 Entsorga Italia S R L Unità biofiltrante per l'abbattimento del biogas di discarica e/o di bioaerosols, ed impianto e processo per l'abbattimento del biogas di discarica e/o di bioaerosols mediante almeno una unità biofiltrante.
WO2011042846A1 (fr) * 2009-10-05 2011-04-14 Co2Balance Italia S.R.L. Processus d'extraction de méthane de flux de biogaz d'enfouissement et unité et installation de biofiltration associées
CN109731485A (zh) * 2019-03-05 2019-05-10 湖州森诺氟材料科技有限公司 一种生物干化用聚四氟乙烯微孔膜及其制备方法
RU2831167C1 (ru) * 2023-12-27 2024-12-02 Игорь Викторович Торопов Укрывной полог для климатической камеры
RU2835225C1 (ru) * 2024-10-28 2025-02-24 Игорь Викторович Торопов Укрывной мембранный полог для климатической камеры

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Publication number Publication date
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