GB2443726A - Filter element - Google Patents
Filter element Download PDFInfo
- Publication number
- GB2443726A GB2443726A GB0721668A GB0721668A GB2443726A GB 2443726 A GB2443726 A GB 2443726A GB 0721668 A GB0721668 A GB 0721668A GB 0721668 A GB0721668 A GB 0721668A GB 2443726 A GB2443726 A GB 2443726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter element
- fins
- area filter
- container
- extended area
- 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.)
- Withdrawn
Links
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000002991 molded plastic Substances 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 21
- 230000005484 gravity Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 241000894006 Bacteria Species 0.000 description 12
- 239000002699 waste material Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012620 biological material Substances 0.000 description 2
- DMJXRYSGXCLCFP-LBPRGKRZSA-N (3s)-n-tert-butyl-1,2,3,4-tetrahydroisoquinoline-3-carboxamide Chemical compound C1=CC=C2CN[C@H](C(=O)NC(C)(C)C)CC2=C1 DMJXRYSGXCLCFP-LBPRGKRZSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000377350 Puan Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/302—Basic shape of the elements
- B01J2219/30242—Star
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
An extended surface area filter element construction including a central body 1 mounting a plurality of additional surfaces 2, serving to provide a greatly increased surface area as compared with a central body of the same size but not having additional surfaces. Preferably the additional surfaces are formed by surfaces such as fins laterally or radially extending from the central body. Each fin may have a stepwise or serrated formation at its free edge. The extended surface filter elements may be formed of moulded plastics and the central body may be formed as a cylindrical tubular core from which project a plurality of the laterally or radially directed fins. The extended surface area filter elements may be utilized in an aerobic filtration plant.
Description
* 2443726 FILTER ELEMENTS FOR BIOLOGiCAL FILTRATION ARRANGEMENTS This
invention relates to filter elements for use with apparatus for andlor methods of facilitating biological filtration of water biological waste materials.
ft is well known to treat i.e., filter, water containing biological materials such as arises in relation to the management and disposal of human and animal food materials and general waste such as is commonly known as sewage material In relation to at least the initial stages of such treatment it is known to retain the material to be treated in settling containers/tanks within which the sewage material undergoes at least the stages of the breakdown of the material content by bacterial action.
In practice, the bacteria involved require and make use of any surface available within the container/tank such as the walls of the container/tank and those of any other surfaces available within the container/tank as a rest' position. Whilst in such rest' position the bacteria biologically react with the waste material within the container/tank and in so doing numerically multiply.
In view of the purpose and function of the installation fresh sewage materials are added to the content of the materials already present in the associated container/tank since the filtering capacity and efficiency is related to the overall bacteria content of the container/tank.
Since the bacteria require a surface upon which to function it is known to provide in the container/tank of a filtration plant, additional surfaces upon which the bacteria may anchor thereby to enhance the filtration capability of the associated filtration plant.
For example, it is known to provide within a container/tank a plurality of elements commonly referred to as filter elements' such as, for example,.
cylindrical tubes having a corrugated outer surface which serves to increase the surface area presented to the bacteria. It will thus be appreciated that by means of provsiorrof sucir bodies th lutaF surface' arepresented tcx the bacteriais many times greater than the actual surface area of the container/tank whereby the filtering of the installation is correspondingly increased.
-..........14 -4t.. L4 l4......... ...... ....4. ... 41.. 41...
....-.........DTD: iii piaI....Li, a a 1U1L vi uic UQL..LclIal a.LIUI1 Iii uiijuIhuOii vv1u Ille IiaLwc vi uie hiolo2ical waste. material the. surfaces. of the. filter elements -can become -loaded -with settled material thereby covering in the actual active surfaces of the filter elements and in so doing reduces the overall area of the surface available for the L...... ....1...... ....k. ... i.t.... ...e......
U[.PPUIL1IJ LIIc UaI.,LCIIa JliVt.).IVVU LU1.U1V1 Wiul 1UUI.'IIU1I ill uic IaLc UI tiuw I.JL waste material. - 9'.. 4.-...1...4t. 4l.... 4.. L.... 1......
it.? ucai wiui Uu itUdLIUII i iia i'veii iuuiiu iIcI.eaiy LI) t.dcail UI IJL1II WIV 1 5 /remove material deoosited onto the filter elements.
J L..* L. ........ ,4.....1._.. ....1......J... 1.-.... ......t.
.....DTD: ILII lii HIHIU Uiat We t..wItauici,L,aiik IIIVULVVU aii U Ut.4J a LI.) accommodate several cubic metres of water and sewage content the removal of the filter elements can be in practice an almost impossible task. Particularly in situations where several hundredIthousands of individual filter elements are freely 2.J:.....L.....-I.........L.... it... ..... 41.... ..* _.I +... L... _ uILIIL)ULcU LIHUUII ULiL III t.UIIL4IiIi IUI Lii IliaLellal It) U LJeaLcu.
#1.... .....*.........-.. ...... -...sL..... 4... ....J.....,... -.
v thai t iiivtc itic UILIU1IIII Ut L1I uiitaitiei %VILIIIII IL U1LUUuIUItI tiiay ILVI1 militate against access enabling satisfactory removal of the individual filter elements for what ever purpose such as replacement cleansing and the like..
f\O TC'r"T' rr mi m TkT rIkrrT1'K1 I.JI II1J_ II V I I'.JI T. ..
L.......* 1... .._......i....... i... C1..... ..1.-......._...... *L...4.. ,J...-l...t.......DTD: LI i an vujt.'t ut ui iuvciiuvii LU piuviuc jinci cICi11jIIb ulat ai lItLclIuvU VV11II iii use to be capable of being randomly disposed within a filtering container/tank of a filtration plant.
c'm A 4tvrc' Ct* mr T1 rkr L.1IPtIJ_1VLLd.1 J tJI ILLI_ L1 VLL' I I'.JI' A 1.. ... .. ....C41..-. .....4...... 41....... ... _1i....4...J....1..._4......
rW%.,UIU1L1 LV a IIIL a}JA,L VI LL1 flIl'IIIIV1l L111 1}JIVVIUGU 411 cALelIucu uiia area filter element construction including a central body mounting a plurality of projections, serving to provide a greatly increased surface area as compared with a central body of the same size but not having such projections.
1 (1 fl....'.......t.1.. 41..... .4.........1..................
.........J 1.... .f....... I......_..lI../.....J...I1.....DTD: IV I iiciauiy ui auuILIulaaI wia'..c wc iuiuivu uy uiiaG iaciaiiyiiauiaziy extending from the central body.
i.1... .........; ....4: ......._.4-.-.J.... -C...... 1_ a pIilLcu allat%cIlICIJL UI IUJI1V11 ALV1IULL% ituiii LIIC 4J111p1 a plurality of fins each having a stepwise, i.e., serrated formation, free edge region.
41.... ....4...J.1...... .t4t. 4... ......1.. 4..
.-.-Ll.1.... 1#.....DTD: %....ulIvclncIILIy LIIC cIIaLU eu IVIIII4UUII ui we iiti i u.it a IV iiauie ui 1I1IVI elements to lock together once they have gravity wise settled following their introduction into a container/tank in such manner as to provide a integrated aerobic filter bed.
T.. -.......4'..........J i.L... ..1.....-...... .. C.._..........1.._...... .. ._I..... ...... ,....1._.J iii a piviiicu.u1LUu4Iu11 utc civincui. aic ivinicu LIVILI a pJaLII iiiaieiiai aiiu comprise a cylindrical tubular core from which a plurality of fins radially project.
T......t..........J t.............4..... ..14...........4 L' 4 3#...........* _...1 1 1....._t.
III a piiviicu lUIIiIaLJVU aiiciiia 4IC VI UIII1V1II iauiai ictu.
1.. C.....1. 41..... ...l.............4....._......... ..
........14...J...l.......... ...I.........._...DTD: iii a twuci I.-VIJLI U..L1V1L tuG IIILCI GIGILICLII..UfltfJufG a IIIUUIUCU p1aL1 ciciiicai having a cylindrical tubular core from which project a plurality of radially J:.4. c..... ...i.. ..a:..i i.a. ..
..L....l 4*...DTD: uIlcicu tiii wiivc Iauiai ll1ul iiaicac tluui caii ciiu vi ui.uic boy to a maximum length centrally of the length of the core body. thereby effectively to provide a generally conical double back-to-back conical appearance..
TL1.. *t., 4':...... .., 41.... ....... ...C.J....l 1......,.41.. ... ..4t.........4 1.....
1 itiaviy uic IIii 41 LuG lGlVJl UI I.*I4AIIIIULU iauiau lCul,ul a.ac 1iiicucu uy a stiffening ring whose plane is perpendicular to the axis of the core.
1.. - 41.... ....J..,.... ...4' 41... ......... .J...J.....4L....4....4... 4L..4 iii a pauut.uiai GllI*JUUIJJIVIII LUG vi uic &iu u piuviuu witiu u-vui. iiuai serve to increase the effective length of this outer edge.
T.. ..4i...... _.......J.,.._..1.....i. .1......
.......lI..._.1.._...,.......DTD: iii a iuiuiu piciciicu U1Iuu.4iUul a cuIIua1y uiativu ulauiGLcu IIul *AJlUIG4 with the core body and the fins at the central region thereof the secondary rings being coaxial with the axis of the core interconnecting the fins in such manner as to stiffen the fins against distortion.
T......... ..J......._........, ..--l__. t'.....4....._...
iii pa1i..c, uuG luuuuvluuai iIIIvu GlcIuuGu1L.aiu u uuiuuiu tuvni a puiyatyituc vu plastics material appropriate to the operation conditions of an aerobic treatment plant..
C........ 41.... l.._... ...1................ ..4.... ....... :..
iii picicuucu IuaiuiGi vu uuui LUG IlulGu GIGnIGuL UI UIG lIlvculIlvIi III 41* aCivui filtration plant includes the step of introducing the filter elements in at least one secondary enclose/container that is in turn introduced into a further container forming part of an aerobic filtration plant and causing material required to be )Ci i1*........J 4... ........ 4*...........k.1. _..l_._...
__.1......._ (..\ ......J...... ..1 u IIILGIGU iv 1ja L*UUUII huG G%UllU4ly cin.uvwetj %.UlIL4lIlCI, f'_........_...41_. .1.. .J.......DTD: I....../.._4.._....... ..... *.. ..ll...... 4*.....DTD: ...uiuvcuuaeuiiiy tiic Gvuiuaty dIG)U%..uI a iv aiuijw u,c IIILGI element content thereof to seftle under mavitv to a consolidated mass of extended area filter elements.
A I4........l1.. ....t. .......J..1.._. ...JI.....t C._ t...1...i.._...
ruwuullaIIy cait aiu viiuaiy cin.iuUlc i piuviuu vviui IilaJI iui its removal from within the further container.
00 rct' TYCQC'T)1TY'II\'KT f't' PT1t rn A i,nrrc' IJILI_l JLL....I%.II I ILII'l.JI I 11L JJI'-t1 VV IIJL) *_.-..... ;........-_. _.i. ..i...... ..._. .l_*..
ivi a ucii uiiuci.iaaiuiii ui ill IIlVUL1UU aiiu w)IIUVV aiuvv LI.) L,O.IIy uic aiiic luLl) effect reference will now be made to the accompanying drawings in which; 1.. ..:_... ..c.. e..... _.e:......i:..:.i....i l4... ...l..._..__4.
i i a puan vicvv ui a lllL cuIUUuIIllcIlL ut a ujujviuuai Hhl.i cIcIulcllL, - ...LL... ...I....-. 1 . i a vviuai ctiiuii ui uic ctcuiicui in,iuii. i, 1...L'..
iiuic..i i a piaii vicw ui a ii..uuiu uuiuuuiiiicuiL Ut a uutuivtuuai iliLci ciuuiIl, ._..... A........I.J.. .. :...4....4....1 1a.d......
IlUlV u a vciUi.,aI c%.Llvul in a uuu iiiuvwiuucin vi a lIIU1VIUUI IilLLl element and C..-.. ---.._l.. _L' ....;.... 1.t._. i -_j,....__._4_...e.t...
iiwc.. viy.iucuiiaui.ai1y uiuuuaie a uiuuc UI U.II% uuc IIILeI ILIIIlI UI LIl invention.
1.. 4.... 1....l 1.1.... L..1........... .C 4.... l.....1 C1..... .l.............
ill L1I IIUIC I dilU L. LII luIuuuI1lIcllL UI t.1l 1llUlVluUI IilLcI ciciiI1ui a LIUVVII therein includes central cylindrical core 1 from which extends a plurality of 1 5 radially directed webs or fins 2 A..
. _.. 1.1.... ...J...... ) ..L........i. 1...DTD: -1 ILIUII..aLCU Ill I%U& I Lllc ticc.) UI caiui iifl L l UUl.WJU Ill IWO series of three regular steps 4 from a minimum distance near each end 5 of the core I to a maximum distance located at a position 6 midways of the length of the core I. The fins in the region of their maximum extensions from the core I L...... ....l.... . 7 el..., . ..ll.. J..... . ...
LU OLI ujiciiu uy au aiuuai iujj I UIL l lllLIlI IUIlIIU WILII uie .J...4' . Ì....
11w j iiiuai 111 vciii.az c.ivii a e.uiiu cnluvuiiiiciii. ui a iuuiviuuai iiiici element 1 which includes a second stiffening ring 9 located intermediate the core I and the ring 7. As will be noted each Fin 2 has two steps 4 to the opposite sides of the ring 7..
5.:ii t... ...4 41...4........., 1....... ..\ L.. 1....J....L.
it win c WIUc&LUUU u.at iwuici Liiiciiin iiii 11UL i.Iuwu) aii uc piuviuu vviuI a view to increasing the available surface area of the filter element.
T4..J1*1.. .I#.__ II Will UC ap.JalCiiL iiat LIIC IUliIlaUUn UI UIC lilWVLuUal IIILCI ciclliCiii. a tliUtIaVU in the. Figures each filter element comprises a multi-surface arrangement providing a considerable area upon which bacteria an settle.
Fh aboe-describe&ind1vidnal-fiItereJemnts' cairbe iormed-by'rno'aldingfroma polyethylene or. plastics. material.. apprnpriale ta thenperation conditions of an..
aerobic treatment plant..
{i wii+ beappreciated That the iridi-ctdua} i+ter e.ents can beof many different forms other than that illustrated iii the Figures For eanipk; the indivihia+ filter e+ements may be comprise a cyiimfri'ca+ core having. internal radially directed webs in addition to the above mentioned radially directed fins extending from the outer surface of the core.
In practice, the mainer of the ackhtioii of such additional webs/fins or the like would be such as to ensure that adequate flows of water and entrained biological materials are able freely to pass through an agglomeration of the filter elements, and further such as not to unnecessarily lead to increase in any clogging of the elements.
Whilst the above discussed embodiments have iriwtlved cylindrical cores in practice the formation of the elements is not restricted to cylindrical form.
As will be understood the main feature of the elements of the filter elements of the invention is the maximisation of the surface area presented to the bacteria involved and thus available to the filtering processes.
As will be appreciated that during sustained use of the filter elements they tend to become blocked/clogged thereby reducing the material throughput efficiency of the filtering system. In addition, there is the possibility that the activity of the bacteria may also diminish As a result of these factors it becomes necessaiy from time to time to replace the blocked/clogged individual filter elements with new filter elements or reclaimed filter elements.
Preferably the free edge region edge formation of the fins is such as to enable the filter elements to lock together once they have gravity wise settled following their introduction into a container/tank in such manner as to provide a integrated 1 5 aerobic filter bed.
In practice, the free edge region edge formation of the fins is such as to enable the filter elements to lock together once they have gravity wise settled following their introduction into the container/tank in such manner as to provide a integrated aerobic filter bed.
This settlement of the filter elements within their containing container/tank they can result in a relatively tightly packed mass which makes it difficult to displace the filter elements when it is required to replace them.
Historically the removal of the individual filter elements from their container/tank has frequently been a tedious time consuming activity and at times somewhat practically difficult in view of the siting of the container/tank frequently underground and only accessible through a manhole.
With a view to removing such difficulties the filter elements as mentioned above the container/tank filling of the individual filter elements can be introduced into one of more secondary containers/enclosures whereby the replacement of used filter elements in a filtering installation reduces to removing the secondary containers/enclosures from the container/tank and replacing them with replacement secondary containers/enclosures and their content of fresh individual filter elements In practice the handling of these secondary containers/enclosures and their individual filter element content can be facilitated by providing each secondary enclosure with a handling rope of the like whose free end is retained in a position affording easy access to such handling ropes. For example, the handling rope ends can be stored adjacent to a manhole cover giving access to the interior of the 1 5 filter installation.
The construction of the secondary enclosure/containers is such as to enable easy access of the water and any entrained material to be treated in the filtration plant.
Thus the secondary enclosures utilises a material enabling easy ingress of the flow of waste water and any entrained waste material solids' into the interior of the secondary enclosures so that the bacteria located on the filter elements can react with the waste material entering and also have easy egress from the secondary enclosures.
Thus the secondary enclosures are conveniently made from a net/mesh like material of such mesh aperture size as to be able to retain the individual filter elements there within whilst providing as large as possible area cross section for the throughput of water borne waste material into the secondary enclosure.
As can be seen from Figure 5, what ever the specific form/construction of the individual fitter elements 2 the elements are introduced into one or more secondary enclosures 10 that are installed into a main container/tank 11 forming part of a treatment plant (not otherwise shown) The number of the secondary enclosures 10 used is governed by the waste material receiving volume of the main container/tank 11 and the physical size of the secondary enclosures 10 and its individual filter element content in use such secondary enclosures will allow the filter elements to settle within the secondary enclosures to form a consolidated mass of the elements the presents a very large surface area for the bacteria to rest' and present a very large surface area of bacteria to the waste introduced into the filtering installation whilst enabling adequate throughput of the waste material to be treated..
It will be appreciated that the mesh like form of the secondary enclosure/containers facilitates the relative movement of the filter elements within the secondary enclosures during at least their initial introduction into the container/tank 11 whilst the enclosure and their filter element content gravity wise settles to a self moulding rest condition relative to the walls of the container/tank and any other secondary enclosures and the filter elements content.
Claims (17)
- CLAiMS I. An extended surface area filter element constructionincluding a central body mounting a plurality of additional surfaces, serving to provide a greatly increased surface area as compared with a central body of the same size but not having additional surfaces..
- 2. An extended surface area filter element as claimed in claim 1, and wherein the additional surfaces are formed by surfaces laterally/radially extending from the central body.
- 3. An extended area filter construction as claimed in claim I or 2, and wherein the additional surfaces comprise a plurality of fins each having a stepwise/serrated formation to their free edge region.
- 4. An extended surface area filter element as claimed in claim 3, wherein the free edge region edge formation of the fins is such as to enable the filter elements to lock together once they have gravity wise settled following their introduction into a container/tank in such manner as to provide a integrated aerobic filter bed.
- An extended area filter element as claimed in claim 3 or 4, and wherein alternate fins are of different lateral/radial length.
- 6 An extended surface area filter element, as claimed in claim I to 5, and wherein the elements are formed front a plastics material and comprises a tubular core from which a plurality of fins providing said additional surfaces radially project.
- 7 An extended area filter element as claimed in any one of the preceding claims, wherein the filter element comprises a moulded plastics element having, a tubular core from which project a plurality of outwardly directed fins whose extension from the core increases stepwise from each end of the core body to a maximum length centrally of the length of the core body.
- 8. An extended area filter element as claimed in claim 7, wherein fines provide a generally conical double back-to-back conical appearance..
- 9 An extended area filter element as claimed in claim 7 or 8, and wherein the fins at their region of maximum extension are stiffened by a stiffening ring whose plane is perpendicular to the axis of the core.
- 10. An extended area filter element as claimed in claim 9, and wherein the outermost edge region of the ring is provided with cut-outs that serve to increase the effective length of this outer edge.
- 11. An extended area filter element as claimed in claim 8, 9 or 10, and including a smaller diameter ring that connects with the core body and the fins at the central region thereof, said smaller diameter ring being coaxial with the axis of the core and arranged so to interconnect the fins in such manner as to stiffen the fins against distortion.
- 12. An extended area filter elements as claimed in any preceding claim, and when formed from a polyethylene or other plastics material appropriate to the operational conditions of an aerobic treatment plant..
- 13. An extended area filter element substantially as herein before described with reference to Figures 1 to 4, of the accompanying drawings
- 14. A method of using a plurality of extended area filter elements as claimed in any one of the preceding claims in an aerobic filtration plant including the step of introducing the filter elements in at least one secondary enclose/container that is in turn introduced into a further container forming part of an aerobic filtration plant and causing material required to be filtered to pass through the secondary enclosure(s) and said container,
- 15. A method s claimed in claim 14 wherein the secondary enclosure/containers are such as to allow the filter element content thereof to settle under gravity to a consolidated mass of extended area filter elements.
- 16. A method as claimed in claim 14 or 15, and in which each said secondary enclosure is provided with means for facilitating its removal from within the further container.
- 17. A method as claimed in dim 16, in which a handling rope or the like is attached to each secondary enclosure, each such first mentioned container is provided with means whereby each such first mentioned container can be readilly removed with its content of elements from the further container.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0622134A GB0622134D0 (en) | 2006-11-07 | 2006-11-07 | Filter elements for biological filtration arrangements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0721668D0 GB0721668D0 (en) | 2007-12-12 |
| GB2443726A true GB2443726A (en) | 2008-05-14 |
Family
ID=37594443
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0622134A Ceased GB0622134D0 (en) | 2006-11-07 | 2006-11-07 | Filter elements for biological filtration arrangements |
| GB0721668A Withdrawn GB2443726A (en) | 2006-11-07 | 2007-11-05 | Filter element |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0622134A Ceased GB0622134D0 (en) | 2006-11-07 | 2006-11-07 | Filter elements for biological filtration arrangements |
Country Status (2)
| Country | Link |
|---|---|
| GB (2) | GB0622134D0 (en) |
| WO (1) | WO2008056115A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012175977A1 (en) * | 2011-06-22 | 2012-12-27 | Warden Plastics Limited | Filter elements for biological filtration arrangements |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843855B (en) * | 2015-05-21 | 2017-06-20 | 浙江德安科技股份有限公司 | A kind of biologic packing material structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3340952A1 (en) * | 1983-11-11 | 1985-05-23 | Sanshin Manufacturing Co. Ltd., Nagoya, Aichi | Filter |
| US4640779A (en) * | 1983-10-18 | 1987-02-03 | Nippondenso Co., Ltd. | Filter element |
| US4842739A (en) * | 1987-08-20 | 1989-06-27 | Minnesota Mining And Manufacturing Company | High surface area filter cartridge |
| EP0504038A1 (en) * | 1991-03-13 | 1992-09-16 | Filtrauto | Filter cartridges with pleated filter element |
| JPH11347329A (en) * | 1998-06-11 | 1999-12-21 | Nippon Rokaki Kk | Filter element |
| WO2003095066A1 (en) * | 2002-05-06 | 2003-11-20 | Access Business Group International Llc | Water filter assembly |
| WO2007122909A1 (en) * | 2006-04-25 | 2007-11-01 | Entegris, Inc. | Pleated filter cartridge |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1537882A (en) * | 1976-04-15 | 1979-01-10 | Acalor Int Ltd | Random packing materials |
| JP3323040B2 (en) * | 1995-09-06 | 2002-09-09 | シャープ株式会社 | Ultrapure water production equipment |
| DE19633629A1 (en) * | 1996-08-21 | 1998-02-26 | Ibero Anlagentech Gmbh | Method and device for biological wastewater treatment |
| US6726838B2 (en) * | 2002-01-07 | 2004-04-27 | Agwise Wise Water Technologies Ltd. | Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier |
| DE102004062915A1 (en) * | 2004-12-22 | 2006-03-30 | Ondeo Industrial Solutions Gmbh | Carrier for keeping water or waste water in motion in biological purification or treatment plant, providing high material conversions, with microbial layer growth surface and structured external surface |
-
2006
- 2006-11-07 GB GB0622134A patent/GB0622134D0/en not_active Ceased
-
2007
- 2007-11-05 WO PCT/GB2007/004209 patent/WO2008056115A2/en active Application Filing
- 2007-11-05 GB GB0721668A patent/GB2443726A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4640779A (en) * | 1983-10-18 | 1987-02-03 | Nippondenso Co., Ltd. | Filter element |
| DE3340952A1 (en) * | 1983-11-11 | 1985-05-23 | Sanshin Manufacturing Co. Ltd., Nagoya, Aichi | Filter |
| US4842739A (en) * | 1987-08-20 | 1989-06-27 | Minnesota Mining And Manufacturing Company | High surface area filter cartridge |
| EP0504038A1 (en) * | 1991-03-13 | 1992-09-16 | Filtrauto | Filter cartridges with pleated filter element |
| JPH11347329A (en) * | 1998-06-11 | 1999-12-21 | Nippon Rokaki Kk | Filter element |
| WO2003095066A1 (en) * | 2002-05-06 | 2003-11-20 | Access Business Group International Llc | Water filter assembly |
| WO2007122909A1 (en) * | 2006-04-25 | 2007-11-01 | Entegris, Inc. | Pleated filter cartridge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012175977A1 (en) * | 2011-06-22 | 2012-12-27 | Warden Plastics Limited | Filter elements for biological filtration arrangements |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0721668D0 (en) | 2007-12-12 |
| GB0622134D0 (en) | 2006-12-20 |
| WO2008056115A2 (en) | 2008-05-15 |
| WO2008056115A3 (en) | 2008-07-10 |
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| Date | Code | Title | Description |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |