US3827559A - Extended surface rotating biological contactor - Google Patents

Extended surface rotating biological contactor Download PDF

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Publication number
US3827559A
US3827559A US00252038A US25203872A US3827559A US 3827559 A US3827559 A US 3827559A US 00252038 A US00252038 A US 00252038A US 25203872 A US25203872 A US 25203872A US 3827559 A US3827559 A US 3827559A
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United States
Prior art keywords
sheets
passages
extended surface
sheet
rotating biological
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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.)
Expired - Lifetime
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US00252038A
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English (en)
Inventor
D Gass
D Prosser
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.)
Siemens Water Technologies Holding Corp
Original Assignee
Autotrol Corp
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 Autotrol Corp filed Critical Autotrol Corp
Priority to US00252038A priority Critical patent/US3827559A/en
Priority to ZA732849A priority patent/ZA732849B/xx
Priority to IL4215973A priority patent/IL42159A/xx
Priority to CA170,244A priority patent/CA984065A/en
Priority to NO186873A priority patent/NO134584C/no
Priority to GB2169573A priority patent/GB1394552A/en
Priority to BG2354173A priority patent/BG20094A3/xx
Priority to HUAU000301 priority patent/HU173032B/hu
Priority to DE2324000A priority patent/DE2324000C3/de
Priority to AR24792073A priority patent/AR194438A1/es
Priority to AU55469/73A priority patent/AU470274B2/en
Priority to CH656173A priority patent/CH582112A5/xx
Priority to NL7306499A priority patent/NL7306499A/xx
Priority to YU122073A priority patent/YU122073A/xx
Priority to BE1005027A priority patent/BE799274A/xx
Priority to DK255173A priority patent/DK143841C/da
Priority to JP5204073A priority patent/JPS5221819B2/ja
Priority to ES414632A priority patent/ES414632A1/es
Priority to CS332273A priority patent/CS174205B2/cs
Priority to SE7306622A priority patent/SE390726B/xx
Priority to FR7316914A priority patent/FR2184068B1/fr
Priority to IT4988373A priority patent/IT985010B/it
Priority to BR341173A priority patent/BR7303411D0/pt
Priority to PL1973162462A priority patent/PL87242B1/pl
Publication of US3827559A publication Critical patent/US3827559A/en
Application granted granted Critical
Assigned to ENVIREX INC. reassignment ENVIREX INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AUTOTROL CORPORATION, A CORP. OF WI.
Assigned to REXNORD INC., A CORP. OF WI reassignment REXNORD INC., A CORP. OF WI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ENVIREX INC., A NV CORP.
Assigned to WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, A CORP. OF DE., WADE, WILLIAM J., RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, TRUSTEE reassignment WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, A CORP. OF DE. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REXNORD INC.
Assigned to ENVIREX INC., A CORP. OF DE reassignment ENVIREX INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REXNORD, INC.
Assigned to WILMINGTON TRUST COMPANY AND WADE, WILLIAM J., TRUSTEE reassignment WILMINGTON TRUST COMPANY AND WADE, WILLIAM J., TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENVIREX INC.
Assigned to WADE WILLIAM J. reassignment WADE WILLIAM J. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). RELEASE BY SECURED PARTY, PREVIOUSLY RECORDED ON AUGUST 25, 1988 REEL 4976 FRAME 352 Assignors: WILMINGTON TRUST COMPANY
Assigned to ENVIREX INC., A CORP OF DE reassignment ENVIREX INC., A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WILLIAM J. WADE, AS TRUSTEE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • C02F3/082—Rotating biological contactors
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/03—Sheet metal

Definitions

  • trapazoidal formed sections are employed with flat 5 References Cited sheets to define a series of parallel, generally concen- N E tric passages and with the radial passages being de- 3 227 429 il gg T PATENTS 210/ X fined by the space between the side edges of the el'lZl 3,232,865 2/1966 Quinn et al. trapazodal Seams 3,335,081 8/1967 El-Naggar 2l0/l7 X 3,703,96l 11/1972 Feuer 210/151 29 Claims, 16 Drawing Figures Primary Examiner-John Adee PAIENIEnws em 3827, 559
  • This invention relates to the biological purification of waste water, and particularly to improved forms of ro tating biological contactors which are partially immersed in the waste water to be treated and are rotated to expose aerobic bacterial slimes, which will grow on the contactor surfaces, alternately to nutrients in the waste water and oxygen from the atmosphere above the waste water.
  • contactor members which provide surfaces for the growth of aerobic bacterial slimes.
  • the contactors are rotated in a partially submerged position in the waste water so that the alternate exposure of the contactor surfaces to the waste water and to the oxygen in the atmosphere causes the growth of a bacterial film which coats the contactor surfaces.
  • the bacterial slime on such surfaces consists primarily of aerobic bacteria which have the ability to absorb, adsorb, coagulate and oxidize the undesirable organic constituents of the waste water and to change such constituents into unobjectionable forms of matter.
  • the use of rotating contactor surfaces also increases the transfer of oxygen to the waste water in the tank through which the contactors rotate. This promotes the multiplication or synthesis of the aerobic bacteria already present in the mixed waste water and in the bacterial film, as well as increasing the ability of the aerobic bacteria to act upon the waste water and reduce it to unobjectionable forms.
  • the invention comprises an extended surface rotating biological contactor having an array of thin-walled, generally circular sheets juxtaposed along a central axis of rotation, with a plurality of circumferentially spaced, radially directed discreet passages formed by adjacent sheets and opening to the periphery of the sheets, and
  • the invention may also reside in such a rotating biological contactor in which the sheets have a central opening which mates with a hollow polygonal shaft for transmitting torque to the sheets, or wherein the central opening in the sheets surrounds a hollow polygonal shaft and is joined thereto by rigid plastic foam disposed between adjacent sheets and the shaft to form a continuous rigid core about the shaft.
  • the objects of the invention include:
  • a rotating biological contactor built up from thin, formed sheet material which define a plurality of generally concentric passages through which the waste water and oxygen can circulate as the concentric passages alternately pass through the waste water and the atmosphere above the waste water, and which also define a plurality of radial passages through which waste water and oxygen can enter and leave the concentric passages;
  • FIGS. 1, 2, 3, 4 and are views of a first embodiment of a rotating biological contactor in accordance with the invention; with FIG. lbeing a front view in elevation of a pair of contactors mounted in a treatment shafts 26 joumaled in bearings 27 mounted on the top of the side walls of the tank 22 and connected to a suitable drive mechanism for rotating the contactors and 21.
  • the contactors 20 and 21 may be employed in tanks of various configurations and sizes, and the tank 22 forms no part of the present invention. Accordingly, the tank 22 and its inlet and outlet are shown in stylized form only.
  • Each of the contactors 20 and 21 comprises a plurality of identical circular, thin wall, formed sheets 28.
  • a pair of sheets 28a and 281) are joined face-to-face to form a disc element 29, and the sheets 28a and 28b of each disc element 29 abut against or are joined to the sheets 28b and 28a, respectively, of each adjacent disc element 29.
  • the sheets 28 are so formed that, when joined together to form a disc element 29, they will define a plurality of spaced radial passages 30 emanating tank, FIG. 2 being a side view of one of the contactors 1 of FIG. 1 as viewed in the plane of the line 2-2 of FIG. 1, and with FIGS. 3, 4 and 5 being several sectional views of the rotating biological contactor taken in the planes of the lines identified in FIGS. 1 and 4, respectively.
  • FIGS. 6 and 7 are views of a second embodiment of a contactor; with FIG. 6 being a front view in elevation of the contactor with parts broken away for purpose of illustration, and with FIG. 7 being a vertical section view taken in the plane of the line 7-7 of FIG. 6.
  • FIGS. 8, 9 and 10 are views of a third embodiment of a contactor; with FIG. 8 being a front view in elevation of. the contactor with parts broken away for purpose of illustration, with FIG. 9 being a side view taken in the plane of the line 9-9 of FIG. 8, and with FIG. 10 being a vertical section view taken in the plane of the line 10-10 of FIG. 8.
  • FIGS. 11 and 12 are views of a fourth embodiment of the invention; with FIG. 11 being a front view in elevation of the contactor with parts broken away for purposes of illustration, and with FIG. 12 being a front view in elevation of a flat sheet forming part of the contactor of FIG. 11.
  • FIG. 13 is a plan view of a continuous strip of formed thin wall sheet material which may be severed along the lines indicated to form trapazoidal sections.
  • FIG. 14 is a view in section .of the continuous strip of FIG. 13 taken in the plane of the line 14-14 of FIG. 13.
  • FIGS. 15 and 16 are views of a fifth embodiment of the invention which utilizes the trapazoidal sections illustrated in FIGS. 13 and 14; with FIG. 15 being a view in front elevation of the contactor and with FIG. 16 being a view in section taken in the plane of the line 16-16 of FIG. 15.
  • a pair of rotating biological contactors 20 and 21 are mounted in a tank 22 having a water inlet 23 and outlet 24.
  • the contactors 20 and 21 are each mounted at their axis of rotation on a hollow square shaft 25 which in turn is mounted on round stub from a central hub and opening to the periphery of the disc element 29.
  • the two sheets 28a and 28b comprising each disc element 29 are also each shaped to define a series of concentric passages 31a, 31b, 310, etc., which are hexagonal in cross section (see FIG. 3) and which extend between adjacent radial passages 30 and are open to the radial passages 30 at each end. 7
  • each sheet 28 is formed with a central hub portion 32 which lies in one end plane of the sheet 28 and which abuts the identical hub portion 32 of the other sheet 28 of each disc element 29.
  • Each sheet 28 is also formed with alternately disposed end wall portions 33a, 33b, 330, etc., which lie alternately in the plane of the central hub portion 32 and in a second, spaced end plane of the sheet 28.
  • the alternate end wall portions 33 are joined by sloping connecting wall portions 34a, 34b, 340, etc., so that each sheet 28 provides one-half of the surfaces necessary to define the concentric passages 31.
  • Each sheet 28 is further formed with walls 35 which lie in a plane midway between the two end planes of the sheet 28, and which are connected by transition surfaces to the end wall portions 33 for the concentric passage 31, so that each sheet 28 provides one-half of the surfaces defining the radial passages 30.
  • adjacent disc elements 29 likewise define radial passages 36 and concentric passages 37a, 37b, 370, etc., therebetween. Accordingly, the array of disc elements 29 arranged side by side produce in total a honeycomblike pattern of concentric passages 31 and 37, as shown in FIG. 3, and a continuous series of radial passages 30 and 36 extending along the axis of rotation of the contactor, as shown in FIG. 4, with the concentric passages 31 and 37,0pening at each end into the radial passages 30 and 36, as shown in FIG. 5.
  • the contactors 20 and 21 are partially submerged within the waste water in the tank 22.
  • waste water will enter into the concentric passages 31 and 37 through the radial passages 30 and 36 as the same are immersed in the waste water, and will flow through the concentric passages 31 and 37 and out of the radial passages 30 and 36 as the radial passages emerge from the waste water.
  • waste water to be treated is brought in contact with the entire submerged inner and outer surfaces of the contactors 20 and 21.
  • the entire inner and outer surfaces of the contactors 20 and 21 are exposed to the oxygen in the atmosphere above the waste water as the atmosphere circulates through the radial and concentric passages.
  • An aerobic bacterial film will grow on the surfaces of the contactors fed by the alternate exposure of the surfaces to the nutrients in the waste water and the oxygen in the atmosphere. When the film builds up to a thickness that will no longer support itself it will slough off and be washed out of the contactor passages by the water movement therethrough.
  • the slime which sloughs off of the contactors can be settled to the bottom of the tank 22 where it can be collected and removed, or the slime can be held in suspension in the waste water for settling and removal at subsequent stages of treatment.
  • the sheets 28 are formed from thin sheet material which may have a thickness preferably in the range of .02 inch to .03 inch.
  • the sheets 28 are preferably formed into the shape described by standard vacuum forming methods.
  • the material is preferably a plastic which is biologically inert. Suitable materials include polysytrene and polyethylene.
  • the sheets 28 may be joined together to form the disc elements 29, and the disc elements 29 may be joined together to form the array, by solvent welding in the case of a suitable material such as polystyrene or by other forms of welding, such as sonic welding, in the case of polyethylene where solvent welding cannot be used.
  • the large flat abutting surface areas provided by the end walls 33 minimize problems in welding which might be caused by radial misalignment of adjacent sheets.
  • the contactor assemblies and 21 present a large surface area upon which biological slime can be grown, in comparison with the foam discs heretofore used for rotating biological contactors.
  • the surface area may be nearly double that of the foam discs.
  • the contactors 20 and 21 will displace much less volume of waste water in the tank with the result that there is a greater volume of waste water retained in the tank at any one time. The increased waste waterretention time which results increases the removal of the undesirable organic material from the waste water.
  • the construction of FIGS. 1 through 5 has about l/lOth the volume.
  • the size of the radial and concentric passages must be large enough that bacterial slime will not build up to such an extent that the passages are blocked.
  • the distance between the two end planes of each sheet 28 may be about 2/3 of an inch.
  • FIGS. 1-5 the first embodiment of the invention has been illustrated with contactors 20 and 21 of a small diameter so as to emphasize the arrangement and disposition of the concentric passages 31 and 37.
  • contactors in accordance with the invention would be of larger relative diameter and accordingly would have many more tiers of concentric passages 31 and 37.
  • FIGS. 6 and 7 illustrate an approach to facilitate the handling and assembly of the large diameter contactors.
  • each sheet of the contactor 40 is composed of a group of identical, formed circular sectors 41.
  • a group of three sectors 41 each having an included angle of nearly 120 are employed to define each sheet.
  • Three sectors 41a defining one sheet are then joined face-to-face with three other sectors 41b defining another sheet to form a disc element.
  • the sectors 41 are formed similar to the continuous sheets 28 of the first embodiment so as to define a plurality of radial passages 42 and concentric passages 43 both between joined sectors of each disc element and between abutting the disc elements. That is, each of the sectors 41 is formed to define one-half of each of the concentric passages 43 and one-half of each of the radial passages 42.
  • the edges 44 of the sectors 41a of one group of a disc element are displaced from the edges 44 of the sectors 41b of the other group by a fixed angle so that no sector 41 has its edges 44 aligned with the edges 44 of the sectors of the group to each side of it.
  • the sectors 41 may be mounted upon a square hollow shaft 45 and the inner perimeter 46 of each sector 41 is preferably defined by a series of concentric squares of the same size as the shaft 45 and angularly displaced from each other by the amount of said fixed angle. With such construction, the square shaft 45 may be utilized to align the sectors 41 relative to each other during assembly.
  • the space between the outer surface of the square shaft 45 and the inner perimeters 46 of the sectors 41, and the space between adjacent sectors 41 at the shaft 45 is preferably filled with a rigid plastic foam 47.
  • the rotating biological contactor 50 is formed of alternate thin wall flat sheets 51 and thin wall formed sheets 52, with each pair of flat and formed sheets 51 and 52 defining a disc element 53 and with the assembly of disc elements 53 mounted on a square hollow shaft 54.
  • the flat sheets 51 are continuous, but the formed sheets 52 are provided with spaced radial cutouts 55 extending outwardly from a central hub portion 56 and increasing in width as the distance from the shaft 54 increases.
  • the formed sheets 52 are provided, similar to the previous embodiments, with alternately disposed end wall portions 57a, 57b, 570, etc., which lie in the two end planes of the formed sheets 52 and which are joined by sloping connecting wall portions 58a, 58b, 580, etc.
  • Concentric passages 59a, 59b, 59c, etc. are thus defined between each formed sheet 52 and flat sheet 51 of each disc element 53, and additional concentric passages 60a, 60b, 60c, etc., are defined between the formed sheet 52 and the flat sheet 51 of adjacent disc elements 53, as shown in FIG. 10.
  • the concentric passages 59 and 60 are each open at their ends at the radial cutouts 55, and the cutouts 55 together with the flat sheets 51 of adjacent disc elements 53 define the radial passages 61.
  • FIGS. 8-10 has certain advantages over the previous embodiment. First, it is less expensive because only half of the sheets need be vacuum formed. Secondly, to provide about the same cross sectional area of the concentric passages 59and 60 as in the previous embodiment, the distance between the end planes of each formed sheet 52 will be about double that for the formed sheets of the previous embodiments. This will result in the radial passages 61 being larger and will further reduce the possibility of pluggrng.
  • the radial passages of the previous embodiments could be formed, similar to the radial passages 61, with increasing cross sectional area as the distance from the axis of rotation increases. This has the advantage of providing the capacity at the radial outer points of the radial passages to accept the increased flow which will naturally occur at such points as the contactor 50 emerges from the waste water.
  • FIGS. 11 and 12 The embodiment of FIGS. 11 and 12 is similar to that of FIGS. 8-10 in that the contactor 70 is built up of alternate flat sheets 71 and formed sheets 72. However,
  • the formed sheets 72 are continuous and are shaped similar to the sheets 28 of the first embodiment. That is, the formed sheets 72 include wall portions 73 midway between the end planes of the sheets 72 which provide one-half of a plurality of radial passages 74. Then, the flat sheets 71 are each provided with radial cutouts 75 which match the location of the wall portions 73 so that eachradial passage 74 is defined by the wall portions 73, of each adjacent pair of formed sheets 72.
  • This embodiment has the advantage of being easier to form because it is simple to cut out material in the flat sheets 71 than it is to do the same in formed sheets. Also, the wall portions 73 in the formed sheets 72 tend to hold the end walls and connecting walls defining the concentric passages in place during assembly so that they do not flatten out and grow in diameter.
  • the contactor 80 is built up from disc elements 81 which comprise a flat circular sheet 82 and a group of trapazoidal, formed sections 83 which together define a formed sheet.
  • the trapazoidal formed sections 83 can be produced by cutting from a continuous formed strip 84 having a cross sectional shape as shown in FIG. 14, with alternately disposed end walls 85 located in two spaced planes and joined by connecting walls 86.
  • the trapazoidal sections 83 are circumferentially spaced apart on each flat sheet 82 to thereby define radial passages 87 between the ends of the trapazoidal sections 83.
  • Generally concentric passages 88 are defined between the trapazoidal section 83 and the flat sheet 82 to each side thereof.
  • the fiat sheets 82 are preferably provided with an inner circular opening 89 which is larger than a square hollow shaft 90 on which the assembly is mounted.
  • a rigid plastic foam 91 is placed about the shaft 90 in the space between the shaft 90 and the central openings 89 in the flat sheets 82 and between adjacent flat sheets 82 at the shaft 90, as shown in FIG. 16. In such manner a solid, rigid foam core is formed about the shaft 90.
  • FIGS. 13-16 has the advantage that the formed sections 83 can be manufactured using plastic extrusion processes rather than the more costly vacuum forming.
  • the passages 88 are parallel to a tangent to the flat sheets 82 and accordingly are not, strictly speaking, concentric passages. However, the parallel passages 88 are intended to be included within the term generally concentric passages as that term is used throughout the specification and claims.
  • the trapazoidal sections 83 at each level are reversed from the adjacent levels.
  • the purpose for such arrangement is to concentrate the surfaces of contact between the formed sections 82 and the flat sheets 82 at as few points as possible. Then, the points at which the formed sections 83 and flat sheets 82 are welded together are reduced because the formed sections 83 on each side of a flat sheet 82 can be joined to the flat sheet in one step.
  • a similar arrangement for the formed sheets 52 of FIGS. 8-10 and the formed sheets 72 of FIGS. 11 and 12 can be used with the same resulting advantages.
  • the contactor of each embodiment can be made by joining each sheet to each adjacent sheet so as to form a continuous, joined structure along the entire length of the contactor.
  • individual disc members may be formed and abutted against adjacent disc members. More commonly, however, a stack of sheets comprising several disc members would be joined together and several stacks would be arrayed to form a length of contactor.
  • a continuous, joined length of contactor will have sufficient strength by reason of the constructions heretofore described so that the central shaft is not needed to support the contactor.
  • a continuous, joined length of contactor may also have a sufficient torque transmitting capacity so that only stub shafts need be applied to the ends of the contactor to support the contactor in the tank and to transmit torque from the powersource to the contactor.
  • high surface area contactors can be produced from inexpensive materials, at low cost, with lightweight and low volume.
  • An extended surface rotating biological contactor comprising:
  • each sheet is formed with walls defining one half of a plurality of said radial passages which are uniformly circumferentially spaced about said sheet,
  • said radial passages are uniformly circumferentially spaced about said sheet, and said concentric passages are each formed as an arc of a circle having its center at said axis of rotation.
  • each of said sheets is formed with a series of alternately disposed end walls lying in two spaced apart planes generally normal to said axis of rotation and with connecting walls joining alternate end walls to each other to thereby define one-half of said concentric passages; and wherein each of said sheets is formed with walls defining one-half of a plurality of said radial passages including walls which lie intermediate the planes of said end walls of said concentric passages.
  • each of said sheets comprises a group of identical, formed circular sectors which together define a substantially continuous circular disc, with the sectors of the groups being joined alternately face-toface and back-to-back along said axis of rotation, and wherein the sectors of each group are circumferentially displaced from the abutting sectors of the adjacent groups.
  • each formed sheet is shaped to define one-half of a plurality of said radial passages; and each flat disc is provided with matching cutouts at said radial passages, whereby each formed sheet defines a radial passage with the formed sheets to each side thereof.
  • alternate ones of said sheets are flat discs and the others each comprise a series of circumferentially spaced, trapazoidal, formed elements joined to the flat discs on each side thereof.
  • each trapazoidal element is shaped to form with said flat sheets a series of generally concentric passages which are aligned parallel to a tangent to said flat discs;
  • said radial passages are defined by the circumferential space between said trapazoidal elements.
  • An extended surface rotating biological contactor comprising:
  • said array of disc elements having a plurality of spaced, radially directed, discrete passages which are open at the periphery of said disc elements
  • disc elements each having a series of internal, generally concentric, discrete passages open at each end to a radially directed passage, and adjacent disc elements defining additional series of genend to a radially directed passage.
  • each of said disc elements is comprised of a pair of identical thin wall, formed sheets joined face-t0- face, and joined back-to-back with the sheets of adjacent disc elements.
  • each sheet is formed with walls defining one half of a plurality of said radial passages which are uniformly circumferentially spaced about said sheet, whereby radial passages are formed between the sheets of each disc member and between the abutting sheets of each adjacent pair of disc elements.
  • each of said sheets is formed with a series of alternately disposed end walls lying in two spaced apart planes generally normal to said axis of rotation and with connecting walls joining alternate end walls to each other to thereby define one-half of said concentric passages; and wherein each of said sheets is also formed with walls defining one-half of a plurality of said radial passages including walls which lie intermediate the planes of said end walls of said concentric passages.
  • each of said disc elements comprises a pair of groups of identical thin wall, formed sheets with each group comprised of identical circular sectors forming a substantially continuous circular disc, with l the sectors of each group being joined face-to-face with the sectors of the other group of said pair, and being joined back-to-back with the sectors of the adjacent disc element.
  • each of said disc elements comprises a flat, thin wall sheet and a formed, thin wall sheet joined to said flat sheet and abutting against the flat sheet of the adjacent disc element, with each formed sheet being so shaped as to define said concentric passages with said flat sheet of its disc element and with the flat sheet of the adjacent disc element.
  • each formed sheet is shaped to define one-half of a plurality of said radial passages which are uniformly circumferentially spaced about said sheet;
  • each flat sheet is provided with matching cutouts at said radial passages
  • each formed sheet defines radial passages with the formed sheets of the disc element to each side thereof.
  • each of said disc elements comprises a flat, thin wall sheet and a series of circumferentially spaced, trapazoidal, thin wall formed sheets joined to said flat sheet and abutting against the flat sheet of the adjacent disc element.
  • each trapazoidal sheet is shaped to form a series of generally concentric passages with said flat sheet which passages are aligned parallel to a tangent to said flat sheet;
  • said radial passages are defined by the circumferential spacebetween said trapazoidal sheets.
  • An extended surface rotating biological contactor comprising:
  • said disc elements each having a central opening with mates with said shaft
  • said array of disc elements having a plurality of spaced, radially directed, discrete passages which are open to the periphery of said disc elements; and said disc elements each having a series of internal generally concentric, discrete passages open at each end to a radially directed passage, with adjacent disc elements defining additional series of gen erally concentric, discrete passages open at each end to a radially directed passage.
  • said shaft is square
  • each of said disc elements comprises a pair of groups of identical thin wall formed sheets with each group comprised of identical circular sectors forming a substantially continuous circular disc;
  • each group being circumferentially displaced by a fixed angle from the sectors of the other group of said disc element and from the abutting sectors of the adjacent disc element;
  • each disc element having a perimeter defined by a series of concentric squares of the size of said shaft and displaced from each other by said fixed angle.
  • a rigid plastic foam is disposed in the space between said shaft and the perimeters of said central openings of said disc elements and in the spaces between disc elements at said shaft to thereby join the disc elements to said shaft.
  • An extended surface rotating biological contactor comprising:
  • said array of disc elements having a plurality of spaced, radially directed, discrete passages which are open at the periphery of said disc elements;
  • said disc elements each having a series of internal generally concentric, discrete passages open at each end to a radially directed passage, and adjacent disc elements defining additional series of generally concentric, discrete passages open at each end to a radially directed passage;

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)
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US00252038A 1972-05-10 1972-05-10 Extended surface rotating biological contactor Expired - Lifetime US3827559A (en)

Priority Applications (24)

Application Number Priority Date Filing Date Title
US00252038A US3827559A (en) 1972-05-10 1972-05-10 Extended surface rotating biological contactor
ZA732849A ZA732849B (en) 1972-05-10 1973-04-26 Rotating biological contactor
IL4215973A IL42159A (en) 1972-05-10 1973-05-01 Rotating biological contactor
CA170,244A CA984065A (en) 1972-05-10 1973-05-02 Rotating biological contactor
GB2169573A GB1394552A (en) 1972-05-10 1973-05-07 Rotating biological contactor
NO186873A NO134584C (et) 1972-05-10 1973-05-07
BG2354173A BG20094A3 (et) 1972-05-10 1973-05-08
DE2324000A DE2324000C3 (de) 1972-05-10 1973-05-09 Vorrichtung zur biologischen Reinigung von Abwasser
AR24792073A AR194438A1 (es) 1972-05-10 1973-05-09 Un contactor biologico rotativo
AU55469/73A AU470274B2 (en) 1972-05-10 1973-05-09 Rotating biological contactor
CH656173A CH582112A5 (et) 1972-05-10 1973-05-09
NL7306499A NL7306499A (et) 1972-05-10 1973-05-09
YU122073A YU122073A (en) 1972-05-10 1973-05-09 Improvement in a rotary biological contactor
BE1005027A BE799274A (fr) 1972-05-10 1973-05-09 Contacteur biologique rotatif,
DK255173A DK143841C (da) 1972-05-10 1973-05-09 Roterbart biologisk kontaktaggregat til brug ved rensning af spildevand
HUAU000301 HU173032B (hu) 1972-05-10 1973-05-09 Aehrofil'tr s pogruzhaemym diskom k ustanovkam dlja ochistki stochnoj vody
JP5204073A JPS5221819B2 (et) 1972-05-10 1973-05-10
CS332273A CS174205B2 (et) 1972-05-10 1973-05-10
SE7306622A SE390726B (sv) 1972-05-10 1973-05-10 Roterande biologisk kontaktor
FR7316914A FR2184068B1 (et) 1972-05-10 1973-05-10
IT4988373A IT985010B (it) 1972-05-10 1973-05-10 Contattore biologico rotante per la purificazione di acqua di rifiuto
BR341173A BR7303411D0 (pt) 1972-05-10 1973-05-10 Contactor biologico rotativo de superficies estendidas
PL1973162462A PL87242B1 (et) 1972-05-10 1973-05-10
ES414632A ES414632A1 (es) 1972-05-10 1973-05-10 Perfeccionamientos en contactores biologicos rotatorios.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00252038A US3827559A (en) 1972-05-10 1972-05-10 Extended surface rotating biological contactor

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US3827559A true US3827559A (en) 1974-08-06

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US00252038A Expired - Lifetime US3827559A (en) 1972-05-10 1972-05-10 Extended surface rotating biological contactor

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US (1) US3827559A (et)
JP (1) JPS5221819B2 (et)
AR (1) AR194438A1 (et)
AU (1) AU470274B2 (et)
BE (1) BE799274A (et)
BG (1) BG20094A3 (et)
BR (1) BR7303411D0 (et)
CA (1) CA984065A (et)
CH (1) CH582112A5 (et)
CS (1) CS174205B2 (et)
DE (1) DE2324000C3 (et)
DK (1) DK143841C (et)
ES (1) ES414632A1 (et)
FR (1) FR2184068B1 (et)
GB (1) GB1394552A (et)
HU (1) HU173032B (et)
IL (1) IL42159A (et)
IT (1) IT985010B (et)
NL (1) NL7306499A (et)
NO (1) NO134584C (et)
PL (1) PL87242B1 (et)
SE (1) SE390726B (et)
YU (1) YU122073A (et)
ZA (1) ZA732849B (et)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886074A (en) * 1973-06-15 1975-05-27 Autotrol Corp Air driven rotating biological contactor apparatus
US3904525A (en) * 1973-08-23 1975-09-09 Lawrence R Rosenberg Waste treatment apparatus
US4022689A (en) * 1973-06-20 1977-05-10 Masashi Kato Rotating multitube biocontactor for treating sewage
US4115268A (en) * 1977-05-16 1978-09-19 Thissen Christopher P Waste water treatment rotor
US4137172A (en) * 1977-08-17 1979-01-30 Fmc Corporation Rotating biological contactor
US4160736A (en) * 1977-10-11 1979-07-10 Autotrol Corporation Rotating trickling filter
US4177147A (en) * 1978-03-20 1979-12-04 Roberts Filter Manufacturing Company Biological treating systems
US4268385A (en) * 1978-03-14 1981-05-19 Dengyosha Engineering Co., Inc. Centrifugal rotating disc assembly for biological waste water treatment apparatus
EP0043579A1 (en) * 1980-07-07 1982-01-13 Sekisui Kagaku Kogyo Kabushiki Kaisha Biological sewage treatment apparatus of the rotary disc type
US4537678A (en) * 1984-10-04 1985-08-27 Walker Process Corporation Rotary biological contactor
US4549962A (en) * 1984-07-19 1985-10-29 Envirex Inc. Rotating biological contactor
US4623492A (en) * 1984-07-23 1986-11-18 Overhoff Ges M.B.H. Aerator for liquids
US5227055A (en) * 1992-01-15 1993-07-13 Cornell Research Foundation, Inc. Aquaculture water treatment system including combined rotating biological contactor and evaporative cooler
US5527454A (en) * 1994-04-26 1996-06-18 Jacobs Environmental, Inc. Mechanical ventilation system to capture gases released from wastewater passing through rock media trickling filters
WO2002074702A2 (de) * 2001-03-15 2002-09-26 Norddeutsche Seekabelwerk Gmbh Tauchtropfkörper
US20070023356A1 (en) * 2005-06-09 2007-02-01 Cuenca Manuel A Active Biological Contactor (ABC); A Modular Wastewater Treatment System
US20110017647A1 (en) * 2007-11-14 2011-01-27 Degremont Installation for the treatment of wastewaters and biological disc for such an installation
US20120273345A1 (en) * 2011-04-20 2012-11-01 Meng Lin Air/water advanced oxidation purification device and spiral partition plate thereof
US20150315036A1 (en) * 2014-05-01 2015-11-05 Benjamin Clegg Water Evaporator Enhancer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49111458A (et) * 1973-02-26 1974-10-23
JPS5152653A (et) * 1974-11-02 1976-05-10 Tanaka Seian Kk
JPS51102360A (et) * 1975-03-05 1976-09-09 Tanaka Seian Kk
JPS5631356Y2 (et) * 1976-09-24 1981-07-25
JPS53145823U (et) * 1977-04-21 1978-11-16
JPS5424965U (et) * 1977-07-20 1979-02-19
JPS5472855U (et) * 1977-11-02 1979-05-24
DE3201848A1 (de) * 1982-01-22 1983-08-04 Mecapec S.A., 8716 Schmerikon Tauchtropfkoerper fuer die biologische abwasserreinigung
IES922606A2 (en) * 1992-08-24 1993-02-10 Butler James Patrick J Apparatus for the treatment of sewage
DE102005062505A1 (de) * 2005-12-27 2007-07-05 Biermann, Jana, Dipl.-Ing. (FH) Rotationstauchkörper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227429A (en) * 1963-02-04 1966-01-04 American Radiator & Standard Mass transfer packing
US3232865A (en) * 1962-06-11 1966-02-01 Johns Manville Method of purifying waste water
US3335081A (en) * 1966-02-02 1967-08-08 El-Naggar Ahmed Sami Method of treatment of sewage by biooxidation and apparatus therefor
US3703961A (en) * 1970-02-18 1972-11-28 Aqua Treatment Ind Inc Rotary biological flow-through filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232865A (en) * 1962-06-11 1966-02-01 Johns Manville Method of purifying waste water
US3227429A (en) * 1963-02-04 1966-01-04 American Radiator & Standard Mass transfer packing
US3335081A (en) * 1966-02-02 1967-08-08 El-Naggar Ahmed Sami Method of treatment of sewage by biooxidation and apparatus therefor
US3703961A (en) * 1970-02-18 1972-11-28 Aqua Treatment Ind Inc Rotary biological flow-through filter

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886074A (en) * 1973-06-15 1975-05-27 Autotrol Corp Air driven rotating biological contactor apparatus
US4022689A (en) * 1973-06-20 1977-05-10 Masashi Kato Rotating multitube biocontactor for treating sewage
US3904525A (en) * 1973-08-23 1975-09-09 Lawrence R Rosenberg Waste treatment apparatus
US4115268A (en) * 1977-05-16 1978-09-19 Thissen Christopher P Waste water treatment rotor
US4137172A (en) * 1977-08-17 1979-01-30 Fmc Corporation Rotating biological contactor
US4160736A (en) * 1977-10-11 1979-07-10 Autotrol Corporation Rotating trickling filter
US4268385A (en) * 1978-03-14 1981-05-19 Dengyosha Engineering Co., Inc. Centrifugal rotating disc assembly for biological waste water treatment apparatus
US4177147A (en) * 1978-03-20 1979-12-04 Roberts Filter Manufacturing Company Biological treating systems
EP0043579A1 (en) * 1980-07-07 1982-01-13 Sekisui Kagaku Kogyo Kabushiki Kaisha Biological sewage treatment apparatus of the rotary disc type
US4399031A (en) * 1980-07-07 1983-08-16 Sekisui Kagaku Kogyo Kabushiki Kaisha Biological sewage treatment apparatus of the rotary disc type
US4549962A (en) * 1984-07-19 1985-10-29 Envirex Inc. Rotating biological contactor
US4623492A (en) * 1984-07-23 1986-11-18 Overhoff Ges M.B.H. Aerator for liquids
US4537678A (en) * 1984-10-04 1985-08-27 Walker Process Corporation Rotary biological contactor
AU567607B2 (en) * 1984-10-04 1987-11-26 Walker Process Corp. Rotary biological contactor
US5227055A (en) * 1992-01-15 1993-07-13 Cornell Research Foundation, Inc. Aquaculture water treatment system including combined rotating biological contactor and evaporative cooler
US5527454A (en) * 1994-04-26 1996-06-18 Jacobs Environmental, Inc. Mechanical ventilation system to capture gases released from wastewater passing through rock media trickling filters
WO2002074702A2 (de) * 2001-03-15 2002-09-26 Norddeutsche Seekabelwerk Gmbh Tauchtropfkörper
WO2002074702A3 (de) * 2001-03-15 2003-03-20 Norddeutsche Seekabelwerk Gmbh Tauchtropfkörper
US20070023356A1 (en) * 2005-06-09 2007-02-01 Cuenca Manuel A Active Biological Contactor (ABC); A Modular Wastewater Treatment System
US7402248B2 (en) * 2005-06-09 2008-07-22 Manuel Alvarez Cuenca Active biological contactor (ABC); a modular wastewater treatment system
US20110017647A1 (en) * 2007-11-14 2011-01-27 Degremont Installation for the treatment of wastewaters and biological disc for such an installation
US8409432B2 (en) * 2007-11-14 2013-04-02 Degremont Installation for the treatment of wastewaters and biological disc for such an installation
US20120273345A1 (en) * 2011-04-20 2012-11-01 Meng Lin Air/water advanced oxidation purification device and spiral partition plate thereof
US10138145B2 (en) * 2011-04-20 2018-11-27 Meng Lin Air/water advanced oxidation purification device and spiral partition plate thereof
US20150315036A1 (en) * 2014-05-01 2015-11-05 Benjamin Clegg Water Evaporator Enhancer

Also Published As

Publication number Publication date
DK143841C (da) 1982-05-10
BR7303411D0 (pt) 1974-07-25
BE799274A (fr) 1973-11-09
DE2324000C3 (de) 1980-10-16
YU122073A (en) 1982-02-25
NL7306499A (et) 1973-11-13
AU470274B2 (en) 1976-03-11
NO134584C (et) 1976-11-10
JPS4961960A (et) 1974-06-15
IL42159A0 (en) 1973-07-30
SE390726B (sv) 1977-01-17
DE2324000B2 (de) 1980-02-14
JPS5221819B2 (et) 1977-06-13
ES414632A1 (es) 1976-02-01
CS174205B2 (et) 1977-03-31
PL87242B1 (et) 1976-06-30
IL42159A (en) 1975-12-31
DE2324000A1 (de) 1973-11-22
IT985010B (it) 1974-11-30
FR2184068A1 (et) 1973-12-21
DK143841B (da) 1981-10-19
HU173032B (hu) 1979-02-28
ZA732849B (en) 1974-03-27
AU5546973A (en) 1974-11-14
GB1394552A (en) 1975-05-21
FR2184068B1 (et) 1977-02-11
AR194438A1 (es) 1973-07-13
BG20094A3 (et) 1975-10-30
CH582112A5 (et) 1976-11-30
CA984065A (en) 1976-02-17
NO134584B (et) 1976-08-02

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