DK162636B

DK162636B - DEVICE FOR AEROBIC BIOLOGICAL WASTE CLEANING

Info

Publication number: DK162636B
Application number: DK447282A
Authority: DK
Inventors: Volker Randolph; Ludwig Scheibinger; Theo Staehler; Bruno Spanich
Original assignee: Theo Staehler
Priority date: 1981-10-10
Filing date: 1982-10-08
Publication date: 1991-11-25
Also published as: PT75624B; ATE7886T1; EP0076977A1; EP0076977B1; DK447282A; JPS5876184A; JPS6411359B2; DE3260252D1; DK162636C; DE3140372C2; ES8306684A1; TR21422A; IE53820B1; PT75624A; DE3140372A1; HK2489A; IE822351L; GR77718B; ES516352A0

Abstract

1. Apparatus for the aerobic biological purification of waste waters according to the combined filtration-activation method, with at least one submerged filter (1) rotating about a longitudinal axis (3) and submerged to the greater part in the waste water, which includes laminar growth bodies (33) as substrates for a so-called biological hotbed, wherein several growth bodies (33) are held mutually spaced by means of spacing elements, are combined into a growth body assembly (24 to 30) and are secured in a supporting construction of the filter (1), wherein the filter (1) has conversion chambers (42) arranged parallel to and spaced from its longitudinal axis (3) and wherein each conversion chamber (42) is provided in its inner (43) and its outer (44) walls, relative to the longitudinal axis (3), with at least one aperture (50; 49, 56, 57) for the passage of waste water and air and is otherwise closed, characterized in that each conversion chamber (42) is defined by two adjacent separate laminar growth bodies (33).

Description

iin

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Opfindelsen angår et apparat til aerob biologisk rensning af spildevand efter den kombinerede dykrislefilter-aktiveret slam-metoden som angivet i krav l's indledning.The invention relates to an apparatus for aerobic biological purification of wastewater according to the combined immersion filter activated sludge method as set forth in the preamble of claim 1.

Ved et fra tysk offentliggørelsesskrift nr. 2.911.975 kendt 5 apparat af denne art er holdekonstruktionen fremstillet med nøjagtig forud fastsat længde som et af stål bestående hus til optagelse af bundterne af grobundselementer. Hvert aktiveringskammer strækker sig over dykri siefil terets fulde aksi ale længde og er sektoragtigt fordelt over dykri siefilterets omkreds. Dykrisiefilteret har en hul 10 aksel, der danner aktiveringskamrenes inderste vægge. Akseparallelle radiale skillevægge mellem aktiveringskamrene og akseparallelle radiale ledevægge i selve aktiveringskamrene består af metalplademateriale og er tættende ved deres ene ende sammensvejst med akslen og ved deres anden ende med lukkede endevægge af dykri siefilteret.By an apparatus known from German publication no. 2 911 975 of this kind, the holding structure is manufactured with precisely predetermined length as a steel housing for receiving the bundles of seedbed elements. Each actuating chamber extends over the full axial length of the dye filter and is sectorally distributed over the perimeter of the dye filter. The dive crisis filter has a hollow shaft forming the inner walls of the actuation chambers. Shaft parallel radial partitions between the actuating chambers and axial parallel radial partitions in the actuating chambers themselves consist of sheet metal material and are sealed at one end with the shaft and at their other end with closed end walls of the dye filter.

15 Aktiveringskamrenes yderste består ligeledes af metalplade og er tættende fastgjort til skillevæggene og endevæggene. Montering og demontering af bundterne af grobundselementer er forholdsvis omstændelig. En særlig alvorlig ulempe er den omkostningskrævende nøjagtige fremstilling efter mål i hvert enkelt tilfælde af stål -20 konstruktionen til fastholdelse af bundterne af grobundselementer. Endvidere er strømningsforholdene for spildevandet og luften ikke optimale i dykri si efil teret, og den luft, som er transporteret ned under spildevandet, udnyttes ikke med den størst mulige overflade.15 The outermost of the activation chambers also consists of metal plate and are sealed tightly to the partitions and the end walls. Mounting and disassembly of the bundles of seedbed elements is relatively cumbersome. A particularly serious disadvantage is the cost-intensive, precise manufacture according to the individual steel case -20 structure for retaining the bundles of seedbed elements. Furthermore, the flow conditions for the wastewater and air are not optimal in the deep filter, and the air transported below the wastewater is not utilized with the largest possible surface.

Dette skyldes delvis, at mellemrummene mellem grobundselementerne 25 ikke er aftættede mod hinanden.This is partly because the gaps between the seedbed elements 25 are not sealed to each other.

Fra DE-patentskriftet nr. 29 14 689 kendes endvidere et apparat af denne art, ved hvilket hvert grobundelementbundt er indsat i en celle i holdekonstruktionen og fastholdes i denne ved hjælp af en holdeskinne. Hver celle begrænses af et afsnit af 30 omkredsen af et indvendigt bærerør, til dette fastgjorte radiale skillevægge, indvendige dækplader og i aksial retning af endevægge.Furthermore, from DE-patent specification 29 14 689 there is known an apparatus of this kind, in which each seed element bundle is inserted into a cell in the holding structure and held in it by means of a holding rail. Each cell is constrained by a section of the circumference of an inner support tube, to the fixed radial partitions, inner cover plates and in the axial direction of the end walls.

Hvert aktiveringskammer mellem to ud for hinanden beliggende grobundelementer er indvendig åbent mod bærerøret og udvendig åbent mod dækpladerne. Heller ikke langs skillevæggene findes der nogen 35 egentlig tæt forbindelse med grobundelementerne. Dette medfører, at der kan optræde uønsket strømning mellem aktiveringskamrene indbyrdes.Each actuating chamber between two adjacent seedlings is open internally against the support tube and externally open to the cover plates. Also not along the partition walls is there any really close connection with the seedbed elements. This causes undesired flow between the actuating chambers to occur.

Fra britisk tilgængel iggjort patentansøgning nr. 2.043.044 kendes en kompliceret konstruktion, hvor hvert grobundselement erFrom UK Available Patent Application No. 2,043,044, a complicated construction is known in which each seedling element is

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2 opbygget af en til et nav fastgjort hovedskive, en i aksi al afstand fra denne anbragt anden skive, der sammen med navet definerer en ringformet sugeåbning samt af vinger, der udgår fra navet, og forbinder de to skiver med hinanden. Grobundselementerne kan også være 5 udformet sektoragtigt og med dobbelte skiver og holdes da i afstand fra hinanden ved hjælp af en aksial forlængelse nær aksen. Mellem hvert grobundselements to skiver er der dannet et aktiveringskammer.2 is made up of a main disc attached to a hub, an axial distance from this second disc, which together with the hub defines an annular suction opening and of wings exiting the hub and connects the two discs to each other. The seedbed elements can also be formed in a sector-like manner with double discs and are then spaced apart by an axial extension near the axis. An activation chamber is formed between the two discs of each seedbed element.

Dette kendte dykri sieelement drives ikke i kombination med aktiveret-slammetoden og strækker sig kun med en mindre del ned i 10 spildevandet. Grobundselementerne virker som centrifugalvingehjul.This known dive control element is not operated in combination with the activated sludge method and extends only to a minor extent into the waste water. The seedbed elements act as centrifugal flywheels.

De sektorformede bundter af grobundselementer er ifølge dette trykskrifts fig. 5 anbragte rundt om en aksel mellem med eger udformede hjul formede endeelementer, der er forbundne med hinanden ved hjælp af stive akseparallelle traverser.The sector-shaped bundles of seedbed elements are according to FIG. 5 is arranged around a shaft between spindle-shaped wheel-shaped end members, which are connected to each other by means of rigid axis parallel traverses.

15 Formålet ved opfindelsen er at forøge grobundfladen for biomassen og forbedre strømningsforholdene for spildevandet og luften samt at forbedre udnyttelsen af luften i dykri siefilteret og samtidig at forenkle dykri siefilterets konstruktion og reducere dets vægt.The object of the invention is to increase the surface area of the biomass and improve the flow conditions for the wastewater and air, and to improve the utilization of the air in the dye filter and at the same time to simplify the structure of the dye filter and reduce its weight.

20 Denne opgave løses ifølge opfindelsen ved, at dykri siefil teret udformes som angivet i krav l's kendetegnende del. Derved er den ønskede forøgelse af grobundfladen opnået. Desuden fås der i hvert bundt af grobundselementer forholdsvis mange aksi alt efter hinanden følgende ens aktiveringskamre, der dannes af billige ens 25 grobundselementer, der er tættet mod hinanden. Derved kan strøm ningsforholdene for spildevand og luft kan beherskes optimalt i aktiveringskamrene. En særlig fordel er, at der ikke kan dannes luftbobler af skadelig størrelse, hvorved luftfordelingen og luftudnyttelsen forbedres i dykrisiefilteret, og skadelige dynamiske 30 påvirkninger af den biologiske filterhud desuden forhindres. Da holdekonstruktionen endvidere ikke længere tjener til begrænsning af aktiveringskamrene, kan denne fremstilles meget lettere og enklere.This problem is solved according to the invention by designing the dye filter as specified in the characterizing part of claim 1. Thereby, the desired increase of the seedbed surface is obtained. In addition, in each bundle of seedbed elements, relatively many axes are obtained successively similar activation chambers, which are formed by inexpensive identical seedbed elements which are sealed to each other. In this way, the flow conditions for waste water and air can be optimally controlled in the activation chambers. A particular advantage is that no harmful air bubbles can be formed, thereby improving air distribution and utilization in the dive crisis filter, and preventing harmful dynamic effects on the biological filter skin. Furthermore, since the holding structure no longer serves to limit the activation chambers, this can be made much easier and simpler.

Det tromleformede dykrisiefilter er hensigtsmæssigt drejeligt lejret i en f.eks. af beton eller stålplade fremstillet tank med mindst 35 mulig afstand til tankens indervæg og drives roterende på egnet måde.The drum-shaped dive crisis filter is suitably pivotally mounted in a e.g. made of concrete or steel plate tank with at least 35 possible distance to the inner wall of the tank and rotated in a suitable manner.

Ved hjælp af det i krav 2 omhandlede opnås med enkle og billige midler en tilstrækkelig aftætning af grobundselementerne i forhold til hinanden, og desuden virker kantflangerne somWith the aid of the aforementioned claim 2, with simple and inexpensive means, sufficient sealing of the seedbed elements relative to each other is obtained, and in addition the edge flanges act as

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3 afstandselementer, der holder grobundselementerne i ønsket afstand fra hinanden.3 spacers which hold the seedbed elements at a desired distance from each other.

Krav 3 angiver en fremstillingsteknisk særlig fordelagtig udformning af kantflangen.Claim 3 discloses a manufacturing technique particularly advantageously designed for the edge flange.

5 En særlig god indbyrdes aftætning opnås ved hjælp af det i krav 4 angivne.A particularly good interlocking is achieved by the means of claim 4.

De i krav 5 angivne ejendommeligheder tjener til strømningstekniske formål, idet de strømmende medier, især luften, ledes bort fra overfladen af pladedelene og ind i midten mellem pladede-10 lene. Derved forhindres uønskede turbulenser og dermed risikoen for, at den biologiske filterhud løsner sig fra grobundelementerne.The properties of claim 5 serve for flow engineering purposes in that the flowing media, especially the air, is directed away from the surface of the plate parts and into the center between the plate parts. This prevents unwanted turbulence and thus the risk of the biological filter skin becoming detached from the seed elements.

Ved hjælp af den i krav 6 angivne forstaltning opnås, at de luftblærer, der under aktiveringskamrenes bevægelse opad, endnu er lukket inde i aktiveringskamrene, ikke pludseligt udtræder gennem 15 hovedåbningen alene, men tidsmæssigt og mængdemæssigt fordelt, først udtræder gennem hjælpeåbningerne og først derefter udtræder gennem hovedåbningen. På denne måde bringes et givet luftvolumen med en endnu større flade i endnu tættere berøring med spildevandet, der skal renses.By the measure of claim 6, it is achieved that the air vesicles which, while moving upwardly of the activation chambers, are still closed inside the activation chambers, do not suddenly exit through the main opening alone, but temporally and quantitatively distributed, first exit through the auxiliary openings and only then exit through the main opening. In this way, a given volume of air with an even larger surface is brought into even closer contact with the wastewater to be purified.

20 Den i krav 7 angivne foranstaltning tjener strømningstek niske formål, idet uønskede strømningspåvirkninger holdes fjernt fra den biologiske filterhud på grobundelementerne.The method of claim 7 serves flow engineering purposes, keeping undesired flow effects away from the biological filter skin on the seedbed elements.

Den ønskede ledevæg opnås på enkel og billig måde ved hjælp af de i krav 8 angivne midler. Denne ledevæg kan f.eks. være anbragt 25 ved midten af omkredsen af det tilhørende aktiveringskammer. Ledevæggen kan f.eks. strække sig over den halve radiale højde af akti veri ngskammeret.The desired guide wall is obtained in a simple and inexpensive manner by the means of claim 8. This guide wall can e.g. be positioned 25 at the center of the circumference of the associated activation chamber. The guide wall may e.g. extend over half the radial height of the actuation chamber.

Ved hjælp af den i krav 9 angivne foranstaltning opnås en særlig god aftætning i området ved ledevæggen.By means of the measure according to claim 9, a particularly good seal is obtained in the area at the guide wall.

30 De i krav 10 angivne midler tjener strømningstekniske formål og centrerer strømningerne til midten mellem nabogrobundelementer.The means specified in claim 10 serve flow engineering purposes and center the flows to the center between neighboring ground elements.

Den i krav 11 angivne løsning er fremstil!ingsteknisk særlig enkel.The solution set forth in claim 11 is particularly technically simple.

Også ved hjælp af de i krav 12 angivne ejendommeligheder 35 opnås fremstil!ingstekniske fordele.Manufacturing technical advantages are also obtained by means of the properties 35 of claim 12.

Opfindelsen forklares nærmere i det følgende under henvisning til de på tegningen anskuel iggjorte udførelseseksempler. På tegningen viser: fig. 1 et billede af et tromleformet dykrislefilter med 4The invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the drawing. In the drawing: FIG. 1 is a view of a drum-shaped immersion filter with 4

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en i tværsnit vist del af en tilhørende tank, fig. 2 et billede af det i fig. 1 viste dykri siefilter delvis i snit set i retningen fra linien 2-2 i fig- 1, 5 fig. 3 et længdesnit gennem den i fig. 2 viste enkelthed 3 i større målestok, fig. 4 et længdesnit gennem den i fig. 2 viste enkelthed 4 i større målestok, fig. 5 et snit efter linien 5-5 i fig. 1 i større 10 målestok, fig. 6 et sidebillede af et i dykri siefilteret ifølge fig. 1-5 anvendeligt grobundselement, fig. 7 et del biIlede af fig. 6 i større målestok set fra linien 7-7 i fig. 6, 15 fig. 8 et snit efter linien 8-8 i fig. 6 i større målestok, fig. 9 et snit efter linien 9-9 i fig. 6 i større målestok, fig. 10 et snit efter linien 10-10 i fig. 6 i større 20 målestok, fig. 11 et til fig. 7 svarende billede af en anden udførelsesform for grobundselementer, og fig. 12 et til fig. 7 og 11 svarende billede af yder ligere en udførelsesform for grobundselementer.Fig. 1 is a cross-sectional view of an associated tank; 2 is a view of the embodiment of FIG. 1 is a partial cross-sectional view of the depth filter shown in the direction from the line 2-2 in FIG. 3 is a longitudinal section through the embodiment of FIG. 2 on a larger scale, FIG. 4 is a longitudinal section through the embodiment of FIG. 2 on a larger scale, FIG. 5 is a sectional view taken along line 5-5 of FIG. 1 on a larger scale; FIG. 6 is a side view of an in-depth filter according to FIG. 1-5 usable seedbed element, fig. 7 shows a part of FIG. 6 on a larger scale as seen from line 7-7 of FIG. 6, FIG. 8 is a sectional view taken along line 8-8 of FIG. 6 on a larger scale; FIG. 9 is a sectional view taken along line 9-9 of FIG. 6 on a larger scale; FIG. 10 is a sectional view taken along line 10-10 of FIG. 6 on a larger scale; FIG. 11 is a view of FIG. 7 is a similar view of another embodiment of seedling elements; and FIG. 12 is a view of FIG. 7 and 11, similar to an embodiment of seedbed elements.

25 Fig. 1 viser et tromleformet dykrisiefil ter 1 med en central aksel 2, hvis længdeakse (fig. 2) er betegnet med 3. På akslen 2 er med aksi al afstand fra hinanden påsvejst flanger 4 og 5 (se også fig. 2), til hver af hvilke der løsbart er fastgjort et hjulformet endeelement 6 og 7.FIG. 1 shows a drum-shaped dive crisis filter 1 with a central shaft 2, whose longitudinal axis (Fig. 2) is indicated by 3. Flanges 4 and 5 are welded to each shaft 2 at axial distance from each other (see also Fig. 2). of which a wheel-shaped end member 6 and 7 are detachably attached.

30 Endeelementerne 6,7 er identiske af konstruktion og er i monteret stilling, som vist i fig. 2, drejet 180° om en tværakse i forhold til hinanden. Det vil derfor være tilstrækkeligt kun at beskrive det i fig. 1 og 2 viste endeelement 6 nærmere.The end members 6,7 are identical in construction and are in the mounted position, as shown in FIG. 2, rotated 180 ° about a transverse axis relative to each other. Therefore, it will suffice to describe only that of FIG. 1 and 2 show further end member 6.

Hver flange 4,5 har udvendigt syv radiale slidser 8, der er 35 ensartet fordelt over omkredsen. I hver slids 8 indgriber den ene ende af en kropdel 9 af en i tværsnit T-formet eger 10-16. Flangen 17 af hver eger 10-16 er ved hjælp af fire skruer 18 forbundet med akslen 2's tilhørende flange 4 eller 5.Each flange 4,5 has externally seven radial slots 8 which are uniformly distributed over the circumference. In each slot 8, one end of a body portion 9 of a cross-sectional T-shaped spokes 10-16 engages. The flange 17 of each spokes 10-16 is connected by means of four screws 18 to the associated flange 4 or 5 of the shaft 2.

Endeelementerne 6,7 er afstivede ved, at der mellem hver to 5The end elements 6,7 are stiffened by the fact that between every two 5

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af egerne 10-16 er indsvejst et indre ringsegment 19 og i radial afstand fra dette et ydre ringsegment 20.of spokes 10-16, an inner ring segment 19 is welded and radially spaced therefrom an outer ring segment 20.

For at lette transporten af endeelementerne 6,7 er disse delt parallelt med længdeaksen 3. Dette opnås ved, at egerne 13 og 5 16 hver udgøres af to vi nkel profil er 21 og 22. Egerne 13's og 16's kropdel 9 er dannet ved, at en flig af hver af vi nkel profil erne 21,22 er lagt mod hinanden og spændt sammen ved hjælp af skruer 23.In order to facilitate the transport of the end elements 6,7, these are divided parallel to the longitudinal axis 3. This is achieved by the fact that the spokes 13 and 5 16 are each formed by two angle profiles 21 and 22. The body part 9 of the spokes 13 and 16 is formed by a tab of each of the key profiles 21, 22 is laid against each other and fastened together by means of screws 23.

Mellem hver to efter hinanden følgende eger 10-16 er anbragt et parallelt med længdeaksen 3 forløbende grobundelementbundt 24-30.Between each two successive spokes 10-16 is arranged a groove element bundle 24-30 parallel to the longitudinal axis 3.

10 Hvert grobundelementbundt 24-30 er indspændt mellem endeelementerne 6,7 ved hjælp af skruer 31, der strækker sig gennem det tilhørende indre ringsegment 19 og skruer 32, der strækker sig gennem det tilhørende ydre ringsegment 20.Each seed base bundle 24-30 is clamped between the end elements 6,7 by means of screws 31 extending through the associated inner ring segment 19 and screws 32 extending through the associated outer ring segment 20.

Hvert grobundselementbundt 24-30 er sammensat af et antal 15 flade grobundselementer 33, der er anbragte efter hinanden parallelt med længdeaksen 3.Each seed bed bundle 24-30 is composed of a plurality of 15 flat seed bed elements 33 arranged in succession parallel to the longitudinal axis 3.

Dykrislefilteret l's aksel 2 er på i og for sig kendt måde lejret i sidevæggene 35 af en tank 34, i hvilken spildevandet når op til en spejl linie 36. Den nederste del af tanken 34 er udformet 20 halvcylindrisk og er koaksial med længdeaksen 3. Drejningen af akslen 2 sker på i og for sig kendt måde ved hjælp af en på tanken 34 påflanget motor. En omløbsretning 37 for dykrislelegemet 1 er i fig. 1 vist ved hjælp af en pil.The shaft 2 of the dye filter 1 is known per se in the side walls 35 of a tank 34 in which the waste water reaches a mirror line 36. The lower part of the tank 34 is formed 20 semi-cylindrical and is coaxial with the longitudinal axis 3. The rotation of the shaft 2 is done in a manner known per se by means of a motor caught on the tank 34. A direction of rotation 37 of the immersion body 1 is shown in FIG. 1 shown by an arrow.

Mellem hvert af endeelementerne 6's og 7's parallelt med 25 længdeaksen 3 flugtende skruepar 31,31 og 32,32 er der mellem de tilhørende indre ringsegmenter 19 eller ydre ringsegmenter 20 indspændt et med længdeaksen 3 parallelt rørformet stift afstandselement 38. Et sådant afstandselement 28 er foroven i fig. 2 antydet med stiplede linier og er i fig. 3 og 4 vist detaljeret. Hvert 30 afstandselement 38 har ved hver af sine ender et indvendigt gevind 39, i hvilket de tilhørende skruer 31,32 er indskruet fra ydersiden af endeelementerne 6,7. Endeelementerne 6,7 spændes på denne måde fast mod enderne af afstandselementerne 38 ved hjælp af skruerne 31,32.Between each of the end members 6's and 7's parallel to the longitudinal axis 3 flushing screw pairs 31,31 and 32,32, a tubular rigid spacer 38 parallel to the longitudinal axis 3 is clamped between the associated inner ring segments 19 or outer ring segments 20. Such a spacer element 28 is at the top in FIG. 2 is a dotted line and in FIG. 3 and 4 shown in detail. Each spacer member 38 has an internal thread 39 at each end thereof, in which the associated screws 31, 32 are screwed in from the outside of the end members 6.7. The end members 6,7 are thus tightened to the ends of the spacers 38 by means of the screws 31, 32.

35 Afstandselementerne 38 strækker sig gennem grobundseleThe spacers 38 extend through the seedbed harness

mentbundterne 24-30, idet hvert grobundselement 33 som vist i fig. 3 og 4 med en bøsning 40 er skudt ind på det tilhørende afstandselement 38. De efter hinanden følgende grobundselementer 33's med hinanden flugtende bøsninger 40 ligger tættende an mod hinanden. I24-30, each seedbed element 33 as shown in FIG. 3 and 4 with a bushing 40 are inserted into the associated spacer member 38. The flushing bushes 40 of the successive seedbed elements 33 are adjacent to one another. IN

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det viste udførelseseksempel er bøsningerne udformede med aftrapninger og skudt aksialt ind i hinanden. Derved tjener bøsningerne 40 som afstandselementer, der holder grobundselementerne 33's bølgede pladedele 41 i aksi al afstand fra hinanden på en sådan måde, at der 5 mellem efter hinanden følgende grobundselementer 33 dannes et aktiveringskammer 42.In the illustrated embodiment, the bushings are designed with steps and axially pushed into each other. Thereby, the bushings 40 serve as spacers which hold the corrugated plate portions 41 of the seed bed elements 33 in axial distance from each other in such a way that 5 between successive seed bed elements 33 is formed an activation chamber 42.

Da grobundselementerne 33 er sprøjtestøbt af polypropylen, har de en vis elasticitet.Since the seedbed elements 33 are injection molded of polypropylene, they have some elasticity.

Ved monteringen af dykri si el egernet 1 spændes først et en-10 deelement, f.eks. endeelementet 6, fast mod afstandselementerne 38 ved hjææp af skruerne 31,32. Det sidste grobundselement 33 af hvert grobundselementbundt 24-30 rager med dets ved endeelementet 7 beliggende bøsning 40 lidt ud over den frie ende af afstandselementet 38. Dette stykke, hvormed bøsningen 40 rager ud over den frie ende 15 af afstandselementet 38, reduceres til 0 ved den elastiske deforme-ring og spændingen af alle bøsningerne mod hinanden, når også det andet element 7 ved hjælp af skruerne 31,32 spændes mod den frie ende af afstandselementerne 38. Fig. 3 og 4 viser denne færdigmon-terede og spændte stilling. Ved denne spænding af bøsningerne 40 mod 20 hinanden opnås en god aftætning mod væske i området ved bøsningerne 40, hvorved en utilsigtet strømning af spildevand fra et aktiveringskammer 42 ind i et andet forhindres.When mounting the immersion heater 1, a single element is first tensioned, e.g. end member 6, fixed to spacers 38 by means of screws 31, 32. The last seedbed member 33 of each seedbed bundle 24-30 projects with its bushing 40 located at the end member 7 slightly beyond the free end of spacer 38. This piece by which bush 40 extends beyond free end 15 of spacer 38 is reduced to 0 by the elastic deformation and the tension of all the bushes against each other, also the second element 7 is tightened by means of the screws 31,32 towards the free end of the spacers 38. FIG. 3 and 4 show this fully assembled and tensioned position. At this tension of the bushings 40 against each other, good sealing against liquid is achieved in the region of the bushings 40, thereby preventing an unintended flow of sewage from one activation chamber 42 into another.

Hvert aktiveringskammer 42 har regnet i retningen fra dykri si ef il teret l's længdeakse 3 en indre væg 43 (fig. 1) og en ydre 25 væg 44, der er tæt forbundne med hinanden ved hjælp af i forhold til radier af dykri si el egernet 1 noget indadtrukne sidevægge 45 og 46. Aktiveringskamrene 42's inderste vægge 43 ligger i radial afstand fra akslen 2, hvorved der mellem akslen 2 og grobundselementbundterne 24-30 er dannet et parallelt med længdeaksen 3 forløbende 30 inderrum 47 med i det væsentlige cirkel ringformet tværsnit.Each actuating chamber 42 has calculated in the direction from the longitudinal axis 3 of the filtered filter 1 an inner wall 43 (Fig. 1) and an outer 25 wall 44, which are closely connected to each other by means of radii of the circular electric grid. 1, slightly inwardly drawn side walls 45 and 46. The inner walls 43 of the activation chambers 42 are radially spaced from the shaft 2, whereby an inner space 47 of substantially circular cross-section is formed between the shaft 2 and the seed element bundles 24-30.

Fig. 5 viser detaljeret udformningen og monteringen af de delte eger 16 og deres svejseforbindelse med de tilgrænsende ydre ringsegmenter 20,20.FIG. 5 shows in detail the design and mounting of the split spokes 16 and their welding connection with the adjacent outer ring segments 20, 20.

I fig. 6 ses et enkelt grobundselement 33. Den inderste væg 35 43, den yderste væg 44 og de to sidevægge 45,46 udgøres af en kantflange 48, der i det væsentlige forløber rundt om hele grobundselementet 33 og kun er afbrudt af en hovedåbning 49 tilnærmelsesvis ved midten af den yderste væg 44 og af en åbning 50 tilnærmelsesvis ved midten af den inderste væg 43. Umiddelbart vedIn FIG. 6, a single seed bed element 33 is seen. The inner wall 35 43, the outer wall 44 and the two side walls 45, 46 are constituted by an edge flange 48 which extends substantially around the entire seed bed element 33 and is only interrupted by a main opening 49 at the middle of the outer wall 44 and of an opening 50 approximately at the center of the inner wall 43. Immediately at

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7 åbningen 50 går kantflangen 48 over i en radialt udad forløbende ledevæg 51, der ender tilnærmelsesvis i den halve radiale højde af grobundselementet 33.In the opening 50, the edge flange 48 passes into a radially outwardly extending guide wall 51 which ends approximately at the half radial height of the seedbed element 33.

I fig. 7 er to grobundselementer 33 sammensat til deres 5 driftsstilling, og af hensyn til tydeligheden er det ene grobundselement 33 vist med fuldt optrukne linier, medens det andet grobundselement 33 er vist med streg-priklinier. Det ses, at hver kantflange 48 strækker sig ud mod begge sider fra grobundselementet 33's bølgede pladedel 41. De over for hinanden anbragte grobunds-10 elementer 33's kantflanger 48 overlapper hinanden og indgriber således fordelagtigt tættende med hinanden.In FIG. 7, two seedbed elements 33 are assembled to their operating position, and for the sake of clarity, one seedling element 33 is shown in solid lines, while the other seedling element 33 is shown with dashed dot lines. It will be seen that each edge flange 48 extends to both sides of the corrugated plate portion 41 of the seedbed element 33. The edge flanges 48 of the abutment elements 33 arranged opposite each other overlap, thus advantageously sealing one another.

Kantf langerne 48's kanter 52 og 53, der grænser op mod hovedåbningerne 49, definerer tilsammen en V-formet udsparing 54 og 55, hvis spids strækker sig bort fra hovedåbningen 49 og i det 15 mindste tilnærmelsesvis ind mod midten mellem de ud for hinanden anbragte grobundselementer 33's pladedele 41.The edges 52 and 53 of the rim 48 adjacent the main apertures 49 together define a V-shaped recess 54 and 55, the tip of which extends away from the main aperture 49 and at least approximately toward the center between the spaced apart ground elements. 33's plate parts 41.

En del af hver kantflange 48, der danner den ydre væg 44 af det tilhørende aktiveringskammer 42, har i dykri siefilteret l's omløbsretning 47 foran hovedåbningen 49 anbragte forholdsvis små 20 hjælpeåbninger 56 og 57. Hjælpeåbningerne 56,57 dannes ved, at parallelt med længdeaksen 3 anbragte kantslidser 58-61 efter grobundselementerne 33's sammenskydning bringes til delvis dækning med hinanden. Disse hjælpeåbninger 56,57 er fortrinsvis anbragt i det mindste tilnærmelsesvis i aktiveringskamrene 42's længdemidterplan 25 for at forhindre, at strømningerne i aktiveringskamrene 42 beskadi-ger den biologiske filterhud, der er dannet på overfladen af grobundselementerne 33.A portion of each edge flange 48 forming the outer wall 44 of the associated actuating chamber 42 has disposed relatively small 20 auxiliary openings 56 and 57 in the circular filter 47 in the direction of rotation 47 in front of the main opening 49. The auxiliary openings 56,57 are formed by parallel to the longitudinal axis 3. placed edge slots 58-61 after the interlocking of the seedbed elements 33 are brought into partial coverage with one another. These auxiliary openings 56,57 are preferably arranged at least approximately in the longitudinal median plane 25 of the activation chambers 42 to prevent the currents in the activation chambers 42 from damaging the biological filter skin formed on the surface of the seedbed elements 33.

Fig. 8 viser ligeledes to grobundselementer 33 i deres driftsstilling. Til forøgelse af aftætningsvirkningen og forbedring 30 af den indbyrdes afstand er både kantflangerne 48 og bøsningerne 40 her skudt ind i hinanden.FIG. 8 also shows two seedbed elements 33 in their operating position. In order to increase the sealing effect and improve the spacing, both the edge flanges 48 and the bushings 40 are here interposed.

Fig. 9 viser opbygningen af ledevæggen 51 ved to ligeledes til driftsstilling sammensatte grobundselementer 33. Hver af ledevæggene 51 dannes af to på over for hinanden anbragte grobundsele-35 menter 33 udformede sideflanger 62 og 63, der overlapper hinanden.FIG. 9 shows the structure of the guide wall 51 by two similarly formed floor elements 33 which are also operative for each position. Each of the guide walls 51 is formed by two overlapping side flanges 62 and 63 formed on opposite floor elements 33.

Hver sideflange 62,63 strækker sig hen til den over for beliggende side af det andet grobundselement 33's pladedel 41 og er forsat i forhold til hinanden på tværs af længdeaksen 3 på en sådan måde, at der ved en ledevæg 51, der er sammensat som vist i fig. 9, fås et 8Each side flange 62,63 extends to the opposite side of the plate portion 41 of the second seed element 33 and is disposed relative to one another across the longitudinal axis 3 in such a way that at a guide wall 51 composed as shown in FIG. 9, an 8 is obtained

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godt tættende anlæg af sideflangerne 62,63 mod hinanden.well-sealing abutment of the side flanges 62.63 towards each other.

Fig. 10 viser, hvorledes en ydre kant 64 af ledevæggen 51 definerer en V-formet udsparing 65, hvis spids strækker sig indad i det mindste tilnærmelsesvis ind i midten mellem de ud for hinanden 5 anbragte grobundselementer 33's pladedele 41. I det i fig. 10 viste tilfælde dannes den yderste kant 64 af en del af de yderste kanter 66 af over for hinanden anbragte grobundselementer 33's sideflanger 62,63, der overlapper hinanden. Den V-formede udsparing 65 kan dog analogt med fig. 12 også være udformet i en ledevæg, der ikke er 10 dannet ved overlapning mellem sideflanger.FIG. 10 shows how an outer edge 64 of the guide wall 51 defines a V-shaped recess 65, the tip of which extends inwardly at least approximately in the middle between the plate portions 41 of the adjacent seedling elements 33. 10, the outer edge 64 is formed by a portion of the outer edges 66 of the lateral flanges 62,63 which are superimposed on one another by the side flanges of the seedbed elements 33. However, the V-shaped recess 65 can be analogous to FIG. 12 may also be formed in a guide wall not formed by overlap between side flanges.

Af hensyn til tydeligheden er de i fig. 11 og 12 viste andre udførelsesformer vist skematisk. Ens dele er forsynede med samme henvisningsbetegnelser.For the sake of clarity, the ones in FIG. 11 and 12, other embodiments shown schematically. The same parts have the same reference numerals.

I fig. 11 er kanterne 52,53 af hvert grobundselement 33's 15 kantflange 48 afskrået i en vinkel på 45°. Også ved denne foranstaltning kommer de V-formede udsparinger 54,55 til at ligge tilstrækkeligt langt borte fra de over for hinanden anbragte grobundselementer 33's pladedele 41. Alternativt er hjælpeåbningerne 57 i fig. 11 udformede som med hinanden flugtende boringer i oven på 20 hinanden beliggende dele af kantflangerne 48.In FIG. 11, the edges 52,53 of the edge flange 48 of each seed base element 15 are bevelled at an angle of 45 °. Also by this measure, the V-shaped recesses 54,55 will be sufficiently far away from the plate portions 41. of the adjacent floor elements 33, alternatively, the auxiliary openings 57 in FIG. 11 are formed as flush bores in overlying portions of the edge flanges 48.

I fig. 12 er hver kantflange 48 udformet på en sådan måde, at den mod den ene side dækker den tilhørende pladedel 41 og mod den anden side kun strækker sig hen til siden af denne pladedel 41. De over for hinanden anbragte grobundselementer 33's kantflanger 48 25 ligger under tilstrækkelig indbyrdes aftætning stump an mod hinanden. Både de V-formede udsparinger 54,55 og hjælpeåbningerne 56,57 er her udformede umiddelbart i kantflangerne 48, idet kantf1angerne 48 af over for hinanden anbragte grobundselementer 33, således som vist i fig. 12, ikke længere overlapper hinanden ved sammensatte 30 grobundselementer 33.In FIG. 12, each edge flange 48 is configured in such a way that it covers one side of the associated plate portion 41 and, on the other side, extends only to the side of this plate portion 41. The edge flanges 48 25 of the abutment elements 33 arranged opposite one another sufficient mutual sealing blunt against each other. Both the V-shaped recesses 54,55 and the auxiliary openings 56,57 are formed here immediately in the edge flanges 48, with the edge flanges 48 of mutually arranged seedbed elements 33, as shown in FIG. 12, no longer overlap at composite 30 seedling elements 33.

Med hensyn til funktionen af de beskrevne spildevandsrensningsapparater kan henvises til det indledningsvis omtalte tyske offentliggørelsesskrift nr. 2.911.975. På analog måde bliver der i det foreliggende tilfælde ved dykri siefilteret l's drejning i 35 omløbsretningen 37 ved aktiveringskamrenes bevægelse ned i spildevandet medbragt et luftvolumen, som er strømmet ind gennem hovedåbningen 49 og under den videre bevægelse af aktiveringskammeret nedad lukkes inde i dette. Dette luftvolumen forbliver i et set i omløbs-retningen 37 bageste delkammer 67 (fig. 1) i aktiveringskammeret 42, 9Regarding the function of the described wastewater treatment apparatus, reference is made to the German publication specification, which was initially mentioned in German publication No. 2,911,975. By analogy, in the present case, by the rotation of the filter filter 1 in the direction of rotation 37, by the movement of the actuating chambers down into the waste water, an air volume which has flowed through the main opening 49 and during the further movement of the actuating chamber downwards is closed within it. This volume of air remains in a set in the direction of rotation 37 rear sub-chamber 67 (Fig. 1) of the activation chamber 42, 9

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indtil kort før aktiveringskammeret når dets nederste stilling. Det bageste del kammer 67 begrænses af sidevæggen 45, ledevæggen 51 og den derimellem beliggende del af den inderste væg 43. Ved dykrisle-filteret l's fortsatte drejning strømmer en stadig større mængde af 5 det indelukkede luftvolumen ud over yderkanten 66 og ind i et forreste del kammer 68 af hvert aktiveringskammer 42.until shortly before the activation chamber reaches its lower position. The rear portion chamber 67 is constrained by the side wall 45, the guide wall 51, and the portion located therein of the inner wall 43. At the continued rotation of the diverter filter 1, an ever-increasing amount of air enters the enclosed air volume beyond the outer edge 66 and into a front portion. chamber 68 of each activation chamber 42.

Hvert forreste del kammer 68 begrænses af sidevæggen 46, ledevæggen 51 og den derimellem beliggende del af den inderste væg 43. Luftvoluminet, der på denne måde er nået ind i det forreste 10 del kammer 68, strømmer ved aktiveringskammeret 42's bevægelse opad i stadig større mængde ud gennem åbningen 50 i den inderste væg 43 og perler gennem spildevandet i inderrummet 47. Et resterende luftvolumen lukkes til sidst inde i den under aktiveringskammeret 42's opstigende bevægelse øverste del af det forreste del kammer 68 og kan 15 kun udtræde på doseret måde af denne gennem hjælpeåbningerne 56,57, men udøver iøvrigt en opdriftskraft, der understøtter dykri siefi 1 -teret l's drejning og derved bidrager til en drivenergibesparelse.Each front portion chamber 68 is constrained by the side wall 46, the guide wall 51, and the portion located therein of the inner wall 43. The volume of air thus reached into the front portion 10 of chamber 68 flows with increasing movement upwardly of the actuating chamber 42. out through the opening 50 of the inner wall 43 and beads through the wastewater into the inner compartment 47. A residual air volume is eventually closed within the upward movement of the upper part of the front portion chamber 68 during the rising chamber 42 and can only exit the dosed way through it. the auxiliary apertures 56,57, but also exert a buoyancy force that supports the rotation of the circular 1-tier 1 and thereby contributes to a drive energy saving.

20 25 30 3520 25 30 35

Claims

Apparatus for aerobic biological purification of wastewater according to the combined immersion filter activated sludge method and with at least one longitudinal axis (3) of rotary immersion filters (1), which with its largest part are immersed in the wastewater and have flat soil elements (33 ) for a so-called biological filter skin, wherein several seedbed elements at a time are spaced apart by means of spacers and are composed of a seed element bundle (24-30) arranged parallel to and spaced from the longitudinal axis (3) of the deep filter. is retained in a holding structure in the immersion filter (1) such that the immersion filter (1) has activation chambers (42) located parallel to and spaced from its 15 longitudinal axis (3), each formed by two neighboring ground elements (33) and edge boundary walls (43-46) and in relation to the longitudinal axis (3) the inner (43) and outer (44) edge boundary walls have at least one flow opening (50; 49,56,57) for waste water and air, but or s is closed, characterized in that the edge boundary walls (43-46) are also formed as a seedbed surface and are sealingly connected to the flat seedbed elements (33).

Apparatus according to claim 1, characterized in that each of the seedbed elements (33) is provided with the edge-limiting walls (43-46) in the form of an edge flange (48) which seals in contact with one or both of the neighboring soil elements. (33).

Apparatus according to claim 2, characterized in that each seedbed element (33) with its edge flange (48) seals in contact with a complementary edge flange (48) on one or both adjacent neighboring soil elements (33).

Apparatus according to claim 3, characterized in that the edge flanges (48) of adjacent neighboring ground elements (33) overlap.

Apparatus according to any one of claims 2-4, 35, characterized in that the part of the edge flange (48) forming the outer limiting wall (44) of the associated activation chamber (42) is interrupted by a main opening (49). and that the edges (48) of each edge flange (48) adjoining the main opening (52,53) form a V-shaped recess (54,55), the tip of which is approximately 16 cm long between two neighboring ground elements (33).

Apparatus according to any one of claims 2-5, characterized in that the part of the edge flange (48) forming the outer limiting wall (44) of the associated actuating chamber (42) has at least one seen in the the direction of rotation of the filter (1) in front of a main opening (49) with relatively large free flow cross-section, arranged relatively small auxiliary opening (56,57).

Apparatus according to claim 6, characterized in that the auxiliary opening or auxiliary openings (56,57) are arranged at least approximately in the longitudinal center between two neighboring ground elements (33).

Apparatus according to any one of claims 1-7, wherein a guide wall (51) extends outwardly from the portion of the edge flange (48) forming the innermost edge restriction wall (43), characterized in that a side flange (62,63) forming the wall (51) and terminating at a distance from the outer boundary wall (44) of the edge flange is secured at one side sealingly to one seed element (33) and at its other side is in sealing contact with the neighboring soil element. (33).

Apparatus according to claim 8, characterized in that the guide wall (51) is made up of the overlapping flanges (62,63) of the adjacent seedling elements (33) which overlap.

Apparatus according to claim 8 or 9, characterized in that an outer edge (64) of the guide wall (51) defines a V-shaped recess (65), the tip of which is at least approximately the length between two adjacent ground elements (33). ).

Apparatus according to any one of claims 8-10, characterized in that each side flange (62,63) is internally closely connected to the edge flange (48) of the associated seed element (33).

Apparatus according to any one of claims 8-11, characterized in that the opening (50) in the inner limiting wall (43) of the edge flange (48) is adjacent to the guide wall (51). 35