[go: up one dir, main page]

WO2023044010A2 - Milieux de filtration de fluide et leurs applications - Google Patents

Milieux de filtration de fluide et leurs applications Download PDF

Info

Publication number
WO2023044010A2
WO2023044010A2 PCT/US2022/043812 US2022043812W WO2023044010A2 WO 2023044010 A2 WO2023044010 A2 WO 2023044010A2 US 2022043812 W US2022043812 W US 2022043812W WO 2023044010 A2 WO2023044010 A2 WO 2023044010A2
Authority
WO
WIPO (PCT)
Prior art keywords
porous
fluid
fluid filtration
filtration medium
scaffolding layer
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/US2022/043812
Other languages
English (en)
Other versions
WO2023044010A3 (fr
Inventor
Jeff Jones
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.)
Ecs Environmental Solutions
Original Assignee
Ecs Environmental Solutions
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 Ecs Environmental Solutions filed Critical Ecs Environmental Solutions
Publication of WO2023044010A2 publication Critical patent/WO2023044010A2/fr
Publication of WO2023044010A3 publication Critical patent/WO2023044010A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1669—Cellular material
    • B01D39/1676—Cellular material of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0645—Arrangement of the particles in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1208—Porosity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present application is directed to materials for fluid treatment using a bioreactor.
  • Bioreactors are often employed for fluid treatment applications, including fluid streams having contaminates such as hydrogen sulfide.
  • the bioreactors include media upon which a fixed film biological (e.g., microbial) composition is grown.
  • the biological composition can be selected to process various contaminates (e.g., hydrogen sulfide, organic compounds, oxides) present in the fluid stream.
  • Such bioreactors are also referred to as bio filters, biotrickling filters, biotowers, or bioscrubbers.
  • the media used in bioreactors can vary based on application.
  • One challenge is to balance surface area of the media with material strength. Increasing surface area can provide additional space for film growth; however, the additional biomass can lead to material collapse and/or clogging.
  • the present application is directed to fluid filtration or fluid treatment media, bioreactors incorporating fluid filtration or fluid treatment media, and methods of producing filtration or fluid treatment media.
  • Implementation of the present disclosure includes a fluid filtration medium including a porous scaffolding layer and porous particles dispersed throughout the porous scaffolding layer.
  • the terms “fluid” and “fluids” include gases, liquids, or combinations thereof.
  • fluid filtration media described herein, for example can be used in air filtration or air treatment applications.
  • the fluid filtration media can be used in water filtration or water treatment applications.
  • porous scaffolding layer includes a fibrous mat.
  • Suitable fibrous mats can be formed continuous fibers and/or discontinuous fibers bonded together.
  • the mat can include continuous fibers bonded at points of intersection with one another.
  • the fibers can be monofilament fibers.
  • a fibrous mat has porosity of at least 60 vol.%. The fibrous mat, for example, can have porosity greater than 80 vol.% or 90 vol.%.
  • porous particles are dispersed throughout the porous scaffolding layer.
  • the porous particles can have any compositional identity consistent with the technical objectives described herein.
  • the porous particles comprise polymeric foam. Similar to the fibrous mats, the polymeric foam can exhibit high porosity.
  • the polymeric foam for example, can have porosity of at least 70 vol.% or at least 80 vol.%, in some embodiments.
  • porosity of the polymeric foam forming the particles can be characterized or quantified by pores per inch (ppi).
  • the polymeric foam of the porous particles has porosity of 5 ppi to 100 ppi.
  • the porous particles can assume other compositional identities as well.
  • the porous particles for example, can comprise glass, plastic, or rock.
  • the porous particles are a mixture of various compositions including foam, glass, plastic, and/or rock. Any combination of porous particles is contemplated herein.
  • Porosity of the scaffold and particles can be selected according to various considerations including, but not limited to, desired fluid flow characteristics through the filtration media, desired surface area of the filtration media, and/or desired mechanical or structural properties of the filtration media.
  • Scaffold and particle porosities can be matched, in some embodiments.
  • scaffold and particle porosities can be within 10 percent or 20 percent of one another.
  • a ratio of scaffold porosity to particle porosity ranges from 0.5 to 2.
  • the porous scaffolding layer having porous particles dispersed therein is rolled into a cylindrical configuration.
  • the fluid filtration medium can include a structure which is produced by forming the porous scaffolding layer into a defined configuration.
  • the rolled configuration can include the porous scaffolding layer formed in concentric radial sections.
  • the porous scaffolding layer having porous particles dispersed therein can be folded or rolled into other configurations. Such folded or rolled configurations can produce adjacent layers of the filtration medium.
  • a fluid filtration medium described herein can exhibit a density gradient in one or more regions of the medium.
  • the density gradient can be provided by non-uniform distribution of the porous particles in the porous scaffolding layer.
  • the density gradient can be provided by thickness variation in the porous scaffolding layer.
  • Density gradients within the fluid filtration media may also be established by varying porosity and/or composition of the scaffold and/or particles forming the filtration media. Density gradients within the fluid filtration media can additionally result from differing regions of the media being subjected to differing pressures. The differing pressures results in differing degrees of compression in the layers.
  • fluid filtration media described herein can exhibit a compositional gradient in one or more regions of the fluid treatment medium.
  • the porous particles can be formed of various materials.
  • composition of the porous particles is varied in one or more regions of the scaffold to establish a compositional gradient.
  • the fluid filtration medium can include other components for filtering and or treating a fluid.
  • embodiments of the present disclosure can include a microorganism component on the porous scaffolding layer and/or the porous particles.
  • the microorganism component can be used or assist in treating one or more contaminates in fluid flowed through the fluid treatment medium.
  • Fluid filtration media described herein comprise a porous scaffolding layer and porous particles positioned in and/or on the porous scaffold.
  • One or both of the scaffolding layer and the porous particles can provide surfaces for adhesion and film growth of the microbe composition so that a fluid passing through the fluid filtration medium interacts with the microbe composition for contaminant remediation.
  • microbe strain(s) e.g., bacterial or yeast
  • the fluid filtration medium can be designed to process one or multiple contaminates.
  • Embodiments of the present disclosure can include various porous scaffolds.
  • the scaffold can include a mat or other similar layer of material.
  • the mat or layer is a three-dimensional structure having a length, width, and depth.
  • the dimension of the depth is generally much smaller than the length and width giving the mat a substantially flat appearance.
  • Example mats in accordance with the present disclosure can include a porosity which provides a void volume for positioning the porous particles within the mat.
  • mats of the porous scaffold can be formed of fibers.
  • the fibers can be bonded to one another or woven, in some embodiments.
  • the fibers can include synthetic fibers formed of any polymeric material consistent with the technical objectives described herein.
  • the fibers can exhibit a monofilament construction or a yarn construction wherein multiple filaments are wound together.
  • suitable mats for porous scaffolding are commercially available from Low & Bonar of Edinburgh, Scotland under the ENKAMAT® trade designation.
  • the fibers can exhibit texture or other surface properties operable to contain, adhere, or trap the contaminant/pollutant control species.
  • the fibers may exhibit channels, depressions, ridges and/or nodules on which microbial species can proliferate. Such surface features can also enhance adhesion of the contaminant/pollutant control species to the porous scaffold.
  • mats of the porous scaffold can be a porous monolithic or continuous body, such as a block or layer of porous polymeric material.
  • the polymeric material can exhibit elasticity and/or can be compressible.
  • blocks or layers of porous polymeric material are compressible to a thickness of 5-20 percent the non-compressed thickness.
  • the blocks or layers of porous polymeric material can also be rolled or folded as described above.
  • Polymeric materials employed in the porous scaffold, whether in fiber form or monolithic form, can exhibit resistance to various chemical species, including acids, bases, and/or organic compounds.
  • the mat or layer can be characterized by two perpendicular axes which respectively define a length and a width of the mat and two opposite faces which respectively define a front and a back of the mat.
  • the substantially flat shape of the mat can be modified to form a cylindrical or elliptical shape.
  • the term rolling should be interpreted as generally understood. Aspects of the rolled mat or layer can include a central void or cavity having a size determined by how tightly the mat is rolled. For example, in some embodiments, it is desired to reduce or substantially eliminate the void passage. Example matting materials may be selected to minimize or eliminate the formation of a void passage when rolling the mat.
  • the fluid filtration medium can employ varying amounts and/or positioning of the porous particles within the scaffold. Particle amounts and/or positioning can be selected according to various considerations including desired fluid flow characteristics through the filtration media, desired structural characteristics of the filtration media, and/or desired profile of microbial growth on the filtration media.
  • the porous particles can be uniformly or substantially uniformly distributed in the porous scaffold.
  • the porous particles for example, can comprise glass, plastic, or rock.
  • the porous particles are a mixture of various compositions including foam, glass, plastic, and/or rock. Any combination of porous particles is contemplated herein.
  • fluid treatment media can have any composition, properties and/or architecture described hereinabove for fluid filtration media.
  • the species responsible for contaminant removal from the fluid stream can be positioned on the porous scaffolding layer and/or the porous particles dispersed in the porous scaffolding layer.
  • one or more microbial species are supported by the porous scaffolding layer and/or the porous particles.
  • reactors for fluid treatment applications are described herein.
  • a reactor includes a housing and a fluid filtration medium positioned within the housing, the fluid filtration medium comprising any composition, structure and/or properties described herein.
  • the housing can include an entrance for introducing a fluid flow and an exit for removing the fluid flow. The entrance and the exit can be positioned so that introducing the fluid flow at the entrance results in the fluid flow contacting the fluid filtration medium positioned within the housing prior to reaching the exit.
  • the reactor can include at least two different fluid filtration media.
  • the filtration reactor can include a first fluid filtration medium having a first amount of the porous particles and a second fluid filtration medium having a second amount of porous particles, the first amount differing from the second amount.
  • compositional identity of the porous scaffold and/or porous particles may vary across the filtration media in a reactor. In this way, density and/or compositional gradients may be employed in the filtration medium or media of a reactor.
  • different fluid filtration media can be employed in the reactor to remove different contaminants/pollutants from a fluid steam.
  • the fluid filtration media can be distributed in zones, each zone dedicated to removing a specific contaminant/pollutant.
  • multiple contaminant/pollutant control species can be mixed on the porous scaffold and porous particles.
  • one contaminant/pollutant control species is supported by the porous scaffold and a second differing contaminant/pollutant control species is supported by the porous particles with the scaffold.
  • Contaminant/pollutant control species can operate by adsorbing, absorbing, and/or decomposing the pollutants of contaminants.
  • Reactors described herein can be used in industrial or municipal air or water filtration applications. In some embodiments, the reactors are employed for odor control. Reactors can include as biofilters, biotrickling filters, biotowers, or bioscrubbers, in some embodiments.
  • Some possible advantages of using different fluid filtration media include segmenting the fluid filtration media into different zones based on the direction of fluid flow through the filtration reactor.
  • some embodiments can include at a filtration reactor including at least two zones. In this manner, entering fluid flow (which would generally have a higher concentration of contaminant) may first contact a zone that includes fluid filtration media having a higher capacity for contaminant removal. As the fluid flow passes through the reactor nearing the exit, a second treatment media having a lower capacity for contaminant removal may be employed.
  • the present disclosure includes a method for forming a fluid filtration medium, the method comprising disposing or positioning porous particles into one or more regions of a porous scaffold, wherein the fluid filtration medium has any of the properties described hereinabove.
  • the porous particles are positioned in the porous scaffold as the scaffold is being wound or folded.
  • the porous particles for example, can be blown into the porous scaffold as the scaffold is being wound into a cylindrical configuration for insertion into a reactor housing.
  • the filtration medium can have any composition, properties, and/or architecture described herein.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

En général, la présente invention concerne des milieux de filtration de fluide ou de traitement de fluide, des bioréacteurs incorporant des milieux de filtration ou de traitement de fluide, et des procédés de production desdits milieux de filtration ou de traitement.
PCT/US2022/043812 2021-09-17 2022-09-16 Milieux de filtration de fluide et leurs applications Ceased WO2023044010A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163245243P 2021-09-17 2021-09-17
US63/245,243 2021-09-17

Publications (2)

Publication Number Publication Date
WO2023044010A2 true WO2023044010A2 (fr) 2023-03-23
WO2023044010A3 WO2023044010A3 (fr) 2023-04-20

Family

ID=85603526

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2022/043812 Ceased WO2023044010A2 (fr) 2021-09-17 2022-09-16 Milieux de filtration de fluide et leurs applications

Country Status (1)

Country Link
WO (1) WO2023044010A2 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7390343B2 (en) * 2005-09-12 2008-06-24 Argonide Corporation Drinking water filtration device
CN101421014B (zh) * 2006-02-13 2013-01-02 唐纳森公司 包括细纤维和反应、吸附或吸收颗粒的过滤网
US7988860B2 (en) * 2007-03-15 2011-08-02 Donaldson Company Inc. Superabsorbent-containing web that can act as a filter, absorbent, reactive layer or fuel fuse
CN101952210B (zh) * 2007-12-31 2013-05-29 3M创新有限公司 流体过滤制品及其制造和使用方法
KR20130041928A (ko) * 2010-07-07 2013-04-25 쓰리엠 이노베이티브 프로퍼티즈 컴파니 패턴화된 에어 레이드 부직포 섬유질 웨브 및 그 제조 및 사용 방법
WO2018229604A2 (fr) * 2017-06-16 2018-12-20 3M Innovative Properties Company Filtres à air comprenant des sorbants polymères pour des aldéhydes
SG10202007819XA (en) * 2019-08-15 2021-03-30 Agency Science Tech & Res Free-standing porous carbon fibrous mats and applications thereof

Also Published As

Publication number Publication date
WO2023044010A3 (fr) 2023-04-20

Similar Documents

Publication Publication Date Title
Liu et al. TiO2 and polyvinyl alcohol (PVA) coated polyester filter in bioreactor for wastewater treatment
Wang et al. High performance ultrafiltration composite membranes based on poly (vinyl alcohol) hydrogel coating on crosslinked nanofibrous poly (vinyl alcohol) scaffold
US7735660B2 (en) Porous multilayered hollow fiber and filtration module, and method of manufacturing porous multilayered hollow fiber
CA2432046C (fr) Membrane de separation, element de membrane de separation, module de membrane de separation, dispositif de traitement d'eaux usees et residuaires, et procede de fabrication de la membrane de separation
JP5006346B2 (ja) ファインファイバーと反応性、吸着性または吸収性微粒子とを含むウェブ
US7361272B2 (en) Anisotropic porous material
Aslam et al. Analysis of membrane fouling with porous membrane filters by microbial suspensions for autotrophic nitrogen transformations
Wang et al. Dynamic fouling behavior and cake layer structure changes in nonwoven membrane bioreactor for bath wastewater treatment
CN105413480A (zh) 含有纳米纤维的复合材料结构
EP2328845B1 (fr) Réacteur à biofilm à membrane à écoulement radial
EP3381476A1 (fr) Élimination de micro-organismes dans des échantillons de fluide à l'aide de supports de filtration de nanofibres
EP3169425B1 (fr) Membrane présentant une surface accrue
Wang et al. Integrated aerobic granular sludge and membrane process for enabling municipal wastewater treatment and reuse water production
Sano et al. Direct and indirect effects of membrane pore size on fouling development in a submerged membrane bioreactor with a symmetric chlorinated poly (vinyl chloride) flat-sheet membrane
US7097768B2 (en) Coconut mesocarp-based biofilter material and its use in a wastewater treatment system
Kiyak et al. Microfiber nonwovens as potential membranes
JP4807777B2 (ja) 汚染流体を処理する方法、汚染流体を処理するシステム、および汚染流体を処理するのに適したバイオマスキャリアを作る方法
WO2023044010A2 (fr) Milieux de filtration de fluide et leurs applications
ATE126721T1 (de) Poröser filtermembranträger aus kohlenstoff/kohlenstoff-verbundmaterial mit einem fasermattensubstrat aus kohlefaser und verfahren zu seiner herstellung.
Yaman et al. Effects of wastewater filtration on geotextile permeability
CN109603575B (zh) 一种基于核孔膜的动态膜及其制备方法与应用
KR20210044250A (ko) 필터 유닛을 갖는 바이오리액터 및 세포 브로스를 처리하는 방법
Cui et al. A facile way to prepare a sponge/cellulose FIBER composite and its application in oil/water separation
DE19925085C1 (de) Verfahren und Vorrichtung zur mikrobiologischen Reinigung von Gasen oder Gasgemischen
Qodriyah et al. Characterization of porosity and permeability in Nata De Soya porous membranes with composition modifications

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22870747

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22870747

Country of ref document: EP

Kind code of ref document: A2