EP0258228A1 - An apparatus for the purification of water, waste water in particular, by a biological oxidation method - Google Patents

An apparatus for the purification of water, waste water in particular, by a biological oxidation method

Info

Publication number
EP0258228A1
EP0258228A1 EP86901883A EP86901883A EP0258228A1 EP 0258228 A1 EP0258228 A1 EP 0258228A1 EP 86901883 A EP86901883 A EP 86901883A EP 86901883 A EP86901883 A EP 86901883A EP 0258228 A1 EP0258228 A1 EP 0258228A1
Authority
EP
European Patent Office
Prior art keywords
water
biorotor
rotor
biomass
granular medium
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Withdrawn
Application number
EP86901883A
Other languages
German (de)
French (fr)
Inventor
Vilho Dunder
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.)
Insinooritoimisto Lujari Oy
Original Assignee
Insinooritoimisto Lujari Oy
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 Insinooritoimisto Lujari Oy filed Critical Insinooritoimisto Lujari Oy
Publication of EP0258228A1 publication Critical patent/EP0258228A1/en
Withdrawn legal-status Critical Current

Links

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
    • C02F3/08—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

Definitions

  • the invention relates to an apparatus for the purification of water, waste water in particular, by a biological oxidation method.
  • Biological waste water treatment is based on the principle that the natural bacterial activity ispromoted by agitation and intro ⁇ duction of oxygen into the waste water, usually by aeration and by providing a suitable substrate for the oxidation bacteria.
  • a biorotor is a slowly rotating cylinder which is horizontally positioned and partly immersed in the water to be treated. As the rotor rotates slowly, a honeycomb assembly alternately sinks in the water/waste water so as to get the bacteria moist and rises up in the air wherein there is plenty of oxygen available for an efficient bacterial activity to take place in a thin film of water. This promotes the interchange of water and air into the biomass carrying out the oxidation as well as the decomposition of organic waste matter taking place under natural conditions.
  • the internal structure of the cylinder is intended to provide the widest poss ⁇ ible area for the bacteria to get attached to.
  • the biomass substrate is honeycomb-like and made of plastic or metal.
  • the manu ⁇ facture of the honeycomb assembly requires expensive manufacturing methods. Because the honeycomb assembly also serves as a load-bearing structure, this restricts increasing of the area of the biomass substrate, which would require an extremely finely built honeycomb assem ⁇ bly.
  • the rotor is usually mounted in bearings at the ends thereof and the rotation is carried out from one end by means of a chain or gear assembly. The rotational power required by the rotor is high and requires heavy driving machineries. As the rotor is supported from the -ends thereof, a steady central shaft has to be provided and the size of the rotor cannot be increased unlimitedly.
  • biorotor according to the invention avoids the disadvantages of existing biorotors and at the same time increases the purifying efficiency. This is achieved by means of the charachteristics disclosed in the claims.
  • the invention is advantageous mainly in that it is simple in construction, the honeycomb assembly,' being replaced with a light granular material.
  • This material forms a so called hydrostatic bearing which eliminates the deflection of the central shaft and enables manufac ⁇ ture of rotors having a greater diameter and length than previously.
  • a manifold substrate for the biomass per unit volume is obtained in comparison with previously known solutions.
  • a simple circulation of the waste water and the purified water through the rotor drum and the separation of solid substances out of the active biomass is effected by theuse of a screen- like surface material of the rotor. The rotation of the drum by means of the incoming water saves driving power.
  • a rotor having a modular structure can be easily manufactured in dif ⁇ ferent sizes.
  • the grain size of the granular material i.e. the inert medium, can be chosen to suit the pur ⁇ pose in each particular case, and, if required, it can be altered in a simple way, which is not possible with previously known solutions.
  • the biobeds used in minor water treatment units can also be replaced by a substrate of a granular material for the biomass.
  • Figure 1 is a general view of a biorotor
  • Figure 2 is a cross-section of an apparatus according to the invention.
  • Figure 3 illustrates a sector module of the appa ⁇ ratus according to the invention.
  • FIG 1 is a general view of a basin 1 of a water treatment plant and a biorotor 2 according to the invention which floats within said basin held up by a loose medium contained in the rotor.
  • Water to be: purified is passed through nozzles 4 of a feeding pipe 3 to a tooth ring 5 of the biorotor, whereby the water effects the turning moment rotating the rotor.
  • This principle is previously known from water mills but the difference lies in that here the water is simultaneously led inside the rotor through a screen-like outer jacket 6 of the 86/05770
  • biorotor After the water has been passed through the biorotor, it is further passed through-a central tunnel 8 to another end 7 of the rotor, wherefrom it can be moved on for further treatment into a subsequent rotor or, if it is completely purified, removed from the process.
  • the biorotor according to the invention is formed by sector modules 20 which are more closely described in Figure 3.
  • the screen-like outer jacket 6 can be made of a perforated sheet, a wire material, or the like. It is essential that the screen-like jacket effects a prescreening and separation of e.g. fibrous particles outside of the biorotor promoting biological oxidation. In this way it is possible to recover the so called flour contained in the waste waters of paper mills, for instance. In practice this can be effected e.g. by means of resilient brush-like scrapers 19 which, in Figure 2, are positioned above a trough 12 dis ⁇ charging superfluous water.
  • the water fed to the circumference of the rotor through the feeding pipes 3 and the nozzles 4 trickles through the jacket 6 of the tooth . ring 5 on the loose grains 11 , wherefrom it further trickles slowly downwards.
  • loose grains can consist of e.g. cork or plastic.
  • the sectors 20 are not completely filled with the loose medium 11 , the grains move therein during the rotation of the rotor and are chafed against each other, which effects self-purification as a result of which the biomass cannot grow excessively in thickness so that the system would be blocked.
  • a buoyancy is crea ⁇ ted which holds up both the granular material 11 and the entire structure of the biorotor. So the loose medium 11 serves as a hydraulic bearing of the biorotor for the whole system, thus providing an even supportion over the whole ' length of the rotor. Consequently, the biorotor can be constructed very light and the drums can be large in diameter and of any length.
  • the structure of the central tunnel 8 appears from the Figure 2 as well as the function of the troughs 9 positioned therein.
  • a spiral-like structure is obtained by mounting said troughs 9 in a slanting posi ⁇ tion with respect to the longitudinal shaft of the rotor, whereby the water trickling into the center is displaced towards the outlet end 7 of the biorotor ( Figure 1).
  • a continuous circulation of the water to be treated can be arranged by providing the central tunnel 8 with closed ends and by pumping water from the outlet end 7 to a subsequent stage of the process.
  • the wall 10 of the central tunnel of the rotor can be made of a similar screen-like material as the outer jacket 6.
  • the amount of the active biomass in a volume unit can be effectively adjusted according to the requirement in each particular case. For example, when a grain size having a diameter of about 8 mm is used, the active biomass area obtained is as large as 500 m'Vrrr and even mpre, which is more than threefold in comparison with the honeycomb structures of previously known biorotors. By decreasing the grain size the active area can be further increased. In this way it is possible to operate the biorotor even in very small water treatment instal ⁇ lations, if required. On the other hand, large and effi ⁇ cient biorotors can be constructed in high capacity plants.
  • Figure 3 illustrates a sector module 20 of the biorotor according to the invention.
  • This is formed by end walls 14, corner supports 13, toothed supports 15, bottom supports 18, a jacket 6, intermediate walls 17 and a bottom wall 10.
  • the end walls 14, the intermediate walls 17 and the bottom wall 10 can be made of a material permeable to water, such as e.g. a wire cloth, or, if desired, the intermediate walls 17 and the end walls 14 can be solid.
  • the sector is for a major part filled with the loose medium 11; however, a free space 21 ( Figure 1) must be left so that the loose grains can move and be chafed against each other. The chafing and mutual mixing of the grains can, if required, be made more effi ⁇ cient by means of agitator plates 16 secured inside the sectors.
  • the entire sector can be detached for maintenance or for the replacement of the loose medium 11, for instance.
  • the biorotor according to the invention can be constructed also otherwise than by the use of modules. Because there is no stationary honeycomb assembly, the sector modules or the like structures can be easily constructed in diffe ⁇ rent sizes or in different shapes whenever this is necessary.
  • the loose medium used as a substrate for the biomass is suitable for any cross-sectional shape of the biorotor.
  • the biorotor according to the invention can be used also for the purification of flue gases or other gases or for odour removal using either a biological or a chemical method.
  • the flue gases or any other gas to be purified is passed into the central tunnel 8 of the rotor, wherefrom it is conveyed through the loose medium 11 , thereby reacting with the liquid film of the medium.
  • a biological method a biological oxidation takes place in the surface film of the loose medium and a liquid, e.g. an alkaline solution upon which the rotor floats, neutralizes the pH-value so that the biological process is not choked.
  • a chemical method the flue gases react chemically with the liquid contained in the surface film of the loose medium. Both methods utilize the large area obtained by means of the loose medium for the reaction to take place as well as the self- purification of. the rotor as the grains are chafed against each other.
  • biorotor according to the invention and the loose medium contained therein can also be used for other purifying purposes of water and gas as described above.

Abstract

Le dispositif comprend un biorotor (2) composé de préférence de modules en forme de secteurs (20). A l'intérieur du biorotor un milieu granulaire (11) forme un substrat pour la biomasse, le milieu servant simultanément de support hydraulique pendant la rotation du rotor partiellement immergé dans l'eau, de manière à soutenir la totalité de la structure du biorotor ainsi que la biomasse active.The device comprises a biorotor (2) preferably composed of sector-shaped modules (20). Inside the biorotor a granular medium (11) forms a substrate for the biomass, the medium simultaneously serving as hydraulic support during the rotation of the rotor partially immersed in water, so as to support the entire structure of the biorotor thus than active biomass.

Description

An apparatus for the purification of water, waste water in particular, by a biological oxidation method
The invention relates to an apparatus for the purification of water, waste water in particular, by a biological oxidation method. Biological waste water treatment is based on the principle that the natural bacterial activity ispromoted by agitation and intro¬ duction of oxygen into the waste water, usually by aeration and by providing a suitable substrate for the oxidation bacteria.
A biorotor is a slowly rotating cylinder which is horizontally positioned and partly immersed in the water to be treated. As the rotor rotates slowly, a honeycomb assembly alternately sinks in the water/waste water so as to get the bacteria moist and rises up in the air wherein there is plenty of oxygen available for an efficient bacterial activity to take place in a thin film of water. This promotes the interchange of water and air into the biomass carrying out the oxidation as well as the decomposition of organic waste matter taking place under natural conditions. The internal structure of the cylinder is intended to provide the widest poss¬ ible area for the bacteria to get attached to.
In known biorotors, the biomass substrate is honeycomb-like and made of plastic or metal. The manu¬ facture of the honeycomb assembly requires expensive manufacturing methods. Because the honeycomb assembly also serves as a load-bearing structure, this restricts increasing of the area of the biomass substrate, which would require an extremely finely built honeycomb assem¬ bly. The rotor is usually mounted in bearings at the ends thereof and the rotation is carried out from one end by means of a chain or gear assembly. The rotational power required by the rotor is high and requires heavy driving machineries. As the rotor is supported from the -ends thereof, a steady central shaft has to be provided and the size of the rotor cannot be increased unlimitedly.
In addition, it is known to use air blowing into the water below the biorotor, whereby a circulating motion of the waste water mass is effected and, conse¬ quently, rotation of the rotor. In practice this process is made more efficient by air cups provided in the rotor, which air cups provide an additional turning moment for the biorotor. A disadvantage of this kind of air blow drive, however, is the high energy requirement of the air pumping.
The biggest disadvantage of existing biorotors is perhaps the accumulation of biomass in the completely static honeycomb assembly. This results in a decrease in the active area, which reduces the efficiency of purifi¬ cation, and in overloading of the supporting structures of the rotor itself as the mass to be elevated continu¬ ously increases. In practice, collapses of the honey¬ comb assemblies have occured frequently. For the elimina¬ tion of this problem, firm and expensive honeycomb struc¬ tures must be provided or a mechanical cleaning of the honeycomb structure has to be arranged or the honeycomb must be replaced at short intervals.
The biorotor according to the invention avoids the disadvantages of existing biorotors and at the same time increases the purifying efficiency. This is achieved by means of the charachteristics disclosed in the claims.
The invention is advantageous mainly in that it is simple in construction, the honeycomb assembly,' being replaced with a light granular material. This material forms a so called hydrostatic bearing which eliminates the deflection of the central shaft and enables manufac¬ ture of rotors having a greater diameter and length than previously. At the same time, a manifold substrate for the biomass per unit volume is obtained in comparison with previously known solutions. When the grains are chafed against each other, an excessive growth of the thickness of the biomass layer is prevented as well as the disadvantages caused thereby. A simple circulation of the waste water and the purified water through the rotor drum and the separation of solid substances out of the active biomass is effected by theuse of a screen- like surface material of the rotor. The rotation of the drum by means of the incoming water saves driving power.
It is of essential importance that a rotor having a modular structure can be easily manufactured in dif¬ ferent sizes. The grain size of the granular material, i.e. the inert medium, can be chosen to suit the pur¬ pose in each particular case, and, if required, it can be altered in a simple way, which is not possible with previously known solutions. The biobeds used in minor water treatment units can also be replaced by a substrate of a granular material for the biomass.
The invention will be described in the following by means of one embodiment with reference to the draw¬ ing, wherein
Figure 1 is a general view of a biorotor,
Figure 2 is a cross-section of an apparatus according to the invention, and
Figure 3 illustrates a sector module of the appa¬ ratus according to the invention.
Figure 1 is a general view of a basin 1 of a water treatment plant and a biorotor 2 according to the invention which floats within said basin held up by a loose medium contained in the rotor. Water to be: purified is passed through nozzles 4 of a feeding pipe 3 to a tooth ring 5 of the biorotor, whereby the water effects the turning moment rotating the rotor. This principle is previously known from water mills but the difference lies in that here the water is simultaneously led inside the rotor through a screen-like outer jacket 6 of the 86/05770
biorotor. After the water has been passed through the biorotor, it is further passed through-a central tunnel 8 to another end 7 of the rotor, wherefrom it can be moved on for further treatment into a subsequent rotor or, if it is completely purified, removed from the process.
As illustrated in the cross-sectional view of Figure 2, the biorotor according to the invention is formed by sector modules 20 which are more closely described in Figure 3. The screen-like outer jacket 6 can be made of a perforated sheet, a wire material, or the like. It is essential that the screen-like jacket effects a prescreening and separation of e.g. fibrous particles outside of the biorotor promoting biological oxidation. In this way it is possible to recover the so called flour contained in the waste waters of paper mills, for instance. In practice this can be effected e.g. by means of resilient brush-like scrapers 19 which, in Figure 2, are positioned above a trough 12 dis¬ charging superfluous water.
As appears from Figure 2, the water fed to the circumference of the rotor through the feeding pipes 3 and the nozzles 4 trickles through the jacket 6 of the tooth . ring 5 on the loose grains 11 , wherefrom it further trickles slowly downwards. Such loose grains can consist of e.g. cork or plastic. Because the feed¬ ing height is above the water surface of the basin 1 , a turning moment rotating the rotor is created. When the loose grains sink in the water to be treated, they are completely moistened with water and when they rise up on the opposite side the superfluous water flows away from between the grains, which brings the moistened biomass on the surface of the grains into contact with air over the entire surface thereof. During each rota¬ tion of the rotor, a complete interchange of the water to be treated and the air is effectedthroughout the biomass, which ensures the best possible operational efficiency. Furthermore, the rotor mixes the water to be treated while it rotates.
Because the sectors 20 are not completely filled with the loose medium 11 , the grains move therein during the rotation of the rotor and are chafed against each other, which effects self-purification as a result of which the biomass cannot grow excessively in thickness so that the system would be blocked. As the granular material is lighter than water, a buoyancy is crea¬ ted which holds up both the granular material 11 and the entire structure of the biorotor. So the loose medium 11 serves as a hydraulic bearing of the biorotor for the whole system, thus providing an even supportion over the whole 'length of the rotor. Consequently, the biorotor can be constructed very light and the drums can be large in diameter and of any length.
Also the structure of the central tunnel 8 appears from the Figure 2 as well as the function of the troughs 9 positioned therein. A spiral-like structure is obtained by mounting said troughs 9 in a slanting posi¬ tion with respect to the longitudinal shaft of the rotor, whereby the water trickling into the center is displaced towards the outlet end 7 of the biorotor (Figure 1). Alternatively, a continuous circulation of the water to be treated can be arranged by providing the central tunnel 8 with closed ends and by pumping water from the outlet end 7 to a subsequent stage of the process. The wall 10 of the central tunnel of the rotor can be made of a similar screen-like material as the outer jacket 6.
By varying the grain size of the granular material 11, the amount of the active biomass in a volume unit can be effectively adjusted according to the requirement in each particular case. For example, when a grain size having a diameter of about 8 mm is used, the active biomass area obtained is as large as 500 m'Vrrr and even mpre, which is more than threefold in comparison with the honeycomb structures of previously known biorotors. By decreasing the grain size the active area can be further increased. In this way it is possible to operate the biorotor even in very small water treatment instal¬ lations, if required. On the other hand, large and effi¬ cient biorotors can be constructed in high capacity plants.
Figure 3 illustrates a sector module 20 of the biorotor according to the invention. This is formed by end walls 14, corner supports 13, toothed supports 15, bottom supports 18, a jacket 6, intermediate walls 17 and a bottom wall 10. The end walls 14, the intermediate walls 17 and the bottom wall 10 can be made of a material permeable to water, such as e.g. a wire cloth, or, if desired, the intermediate walls 17 and the end walls 14 can be solid. The sector is for a major part filled with the loose medium 11; however, a free space 21 (Figure 1) must be left so that the loose grains can move and be chafed against each other. The chafing and mutual mixing of the grains can, if required, be made more effi¬ cient by means of agitator plates 16 secured inside the sectors. By detaching the end walls 14 of the sector from the corner supports 13, the entire sector can be detached for maintenance or for the replacement of the loose medium 11, for instance. Naturally, the biorotor according to the invention can be constructed also otherwise than by the use of modules. Because there is no stationary honeycomb assembly, the sector modules or the like structures can be easily constructed in diffe¬ rent sizes or in different shapes whenever this is necessary. The loose medium used as a substrate for the biomass is suitable for any cross-sectional shape of the biorotor.
The biorotor according to the invention can be used also for the purification of flue gases or other gases or for odour removal using either a biological or a chemical method. The flue gases or any other gas to be purified is passed into the central tunnel 8 of the rotor, wherefrom it is conveyed through the loose medium 11 , thereby reacting with the liquid film of the medium. In a biological method, a biological oxidation takes place in the surface film of the loose medium and a liquid, e.g. an alkaline solution upon which the rotor floats, neutralizes the pH-value so that the biological process is not choked. In a chemical method, the flue gases react chemically with the liquid contained in the surface film of the loose medium. Both methods utilize the large area obtained by means of the loose medium for the reaction to take place as well as the self- purification of. the rotor as the grains are chafed against each other.
It is obvious that the biorotor according to the invention and the loose medium contained therein can also be used for other purifying purposes of water and gas as described above.

Claims

' Claims:
1. Apparatus for the purification of water, waste water in particular, by a biological oxidation method, said apparatus comprising a biorotor (2) partly immerse- able in the water to be treated, which biorotor during its rotation alternately sinks a substrate of the bio¬ mass in the water and lifts it up in the air to promote the activity of the active biomass, c h a r a c t e ¬ r i z e d in that a granular medium (11) used as a substrate for the biomass is provided inside the bio¬ rotor (2) , said granular medium simultaneously serving as a hydraulic bearing which holds up the entire bio¬ rotor structure as well as the active biomass.
2. Apparatus according to Claim 1, c h a r a c ¬ t e r i z e d in that the biorotor (2) preferably consists of sector modules (20) , the granular medium (11) being positioned within said modules.
3. Apparatus according to Claim 1 and 2, c h a ¬ r a c t e r i z e d in that an outer jacket (6) of the biorotor (2) is made of a perforated material, such as a wire cloth or the like.
4. Apparatus according to Claims 1 to 3, c h a ¬ r a c t e r i z e d in that nozzles (4) are provided for the rotation of the biorotor (2) , through which nozzles water is passed to a rotor tooth ring (5) .
5. Apparatus according to Claims 1 to 4, c h a ¬ r a c t e r i z e d in that troughs (9) forming a screw line are provided in a central tunnel (8) of the rotor (2) for the removal of the purified water.
6. Appparatus according to Claims 1 and 2, c h a ¬ r a c t e r i z e d in that the granular medium (11) preferably consists of cork, plastic or the like.
EP86901883A 1985-04-04 1986-03-25 An apparatus for the purification of water, waste water in particular, by a biological oxidation method Withdrawn EP0258228A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI851369A FI80070C (en) 1985-04-04 1985-04-04 Device for purifying water, especially waste water, with a biological oxidation method and using the device for purifying gases
FI851369 1985-04-04

Publications (1)

Publication Number Publication Date
EP0258228A1 true EP0258228A1 (en) 1988-03-09

Family

ID=8520635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901883A Withdrawn EP0258228A1 (en) 1985-04-04 1986-03-25 An apparatus for the purification of water, waste water in particular, by a biological oxidation method

Country Status (12)

Country Link
EP (1) EP0258228A1 (en)
AT (1) ATA903786A (en)
DE (1) DE3690150T1 (en)
ES (1) ES8701694A1 (en)
FI (1) FI80070C (en)
GB (1) GB2194526B (en)
GR (1) GR860872B (en)
NL (1) NL8620108A (en)
NO (1) NO159265C (en)
SE (1) SE461146B (en)
SU (1) SU1479003A3 (en)
WO (1) WO1986005770A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK454287A (en) * 1987-08-28 1989-05-08 Niels Vestergaard WHEELING WHEELS AND WATER FILLING SYSTEMS
DE3929049A1 (en) * 1989-09-01 1991-03-07 Norbert Schwarting REACTOR FOR MICROBIAL DEGRADATION OF ORGANICALLY LOADED SUBSTRATES
EP0414957A1 (en) * 1989-09-28 1991-03-06 Joachim Dipl.-Ing. Tatura Hydrodynamic bioreactor with submersible chambers
US5419831A (en) * 1990-06-11 1995-05-30 Aquaria, Inc. Rotating biological aquarium filter system
US5779885A (en) * 1990-06-11 1998-07-14 Aquaria, Inc. Rotating biological filter system
US5868926A (en) * 1990-06-11 1999-02-09 Aquaria, Inc. Rotating biological filter system
DK0542755T3 (en) * 1990-06-11 1997-02-10 Aquaria Inc
DE4203103A1 (en) * 1992-02-04 1993-08-05 Passavant Werke Biological cleaning of waste water - where biological substrate is contained in perforated hollow bodies which are attached to endless belt or chain and pass in and out of water
SK278451B6 (en) * 1992-04-29 1997-06-04 Vlastimil Koutecky The cage bio-contactor of sewage disposal plant
WO1995008512A1 (en) * 1993-09-22 1995-03-30 Aquaria, Inc. Rotating biological filter system
FR2769920B3 (en) * 1997-10-16 1999-11-26 Jean Michel Egretier PERFORMING AND SELECTIVE AEROBIC ROTARY BACTERIAL FILTER
GB2335189A (en) * 1998-03-14 1999-09-15 Itms Water Treatment Limited Liquid effluent treatment apparatus
US6245236B1 (en) 1999-05-26 2001-06-12 Cercona Of America Inc. Reciprocating biological filter
CN102703307A (en) * 2012-07-02 2012-10-03 刘宇 Large-capacity water immersion horizontal type anaerobic digestion reaction tank
CN105733719B (en) * 2014-12-09 2018-12-25 中国石油天然气股份有限公司 A kind of aerator and bio-reaction system suitable for natural gas biological desulphurization
RU167652U1 (en) * 2015-12-02 2017-01-10 Федеральное государственное учреждение "Федеральный исследовательский центр "Фундаментальные основы биотехнологии" Российской академии наук" (ФИЦ Биотехнологии РАН) Biorotor treatment device
FR3073838B1 (en) 2017-11-23 2021-01-08 Veolia Water Solutions & Tech SYSTEM FOR THE BIOLOGICAL TREATMENT OF WATER AND CORRESPONDING METHOD
CN108570401A (en) * 2018-04-04 2018-09-25 重庆工业职业技术学院 Bioreactor centrifuges lift agitator

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE100517C1 (en) * 1937-02-23 1940-12-17 K Petersen Method for treatment of sewage and other waste or sewage water and device for its execution.
LU54404A1 (en) * 1967-08-30 1969-06-10
US4028244A (en) * 1972-01-26 1977-06-07 European Plastic Machinery Mfg. A/S Apparatus for establishing contact between a liquid and a gas
US4160736A (en) * 1977-10-11 1979-07-10 Autotrol Corporation Rotating trickling filter
JPS54120950A (en) * 1978-03-14 1979-09-19 Dengyosha Mach Works Centrifugal rotating disc for biological oxidation treatment device
US4200532A (en) * 1978-06-07 1980-04-29 Ishigaki Kiko Co., Ltd. Wastewater treatment apparatus
DE2839872C3 (en) * 1978-09-13 1981-03-12 Funk, Michael, Ing.(grad.), 6604 Güdingen Processes and devices for biological wastewater treatment using the sludge activation process
DE2911975C2 (en) * 1979-03-27 1982-11-18 Theo 6253 Hadamar Stähler Device for converting foreign substances contained in sewage or sewage sludge, in particular pollutants, into harmless substances
GB2072647A (en) * 1979-08-02 1981-10-07 Hancock M C Biological reactor
DE3238366C2 (en) * 1982-10-16 1985-05-09 Adolf Ing.(grad.) 5828 Ennepetal Neuhaus Device for aquariums for the treatment of polluted water

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605770A1 *

Also Published As

Publication number Publication date
ES8701694A1 (en) 1986-12-01
NO159265C (en) 1988-12-14
SE8703835L (en) 1987-10-05
GB8723271D0 (en) 1987-11-04
FI851369L (en) 1986-10-05
ATA903786A (en) 1991-10-15
GB2194526B (en) 1989-11-01
SE461146B (en) 1990-01-15
FI80070B (en) 1989-12-29
NO159265B (en) 1988-09-05
NL8620108A (en) 1988-01-04
NO864856D0 (en) 1986-12-03
NO864856L (en) 1986-12-03
FI80070C (en) 1990-04-10
GB2194526A (en) 1988-03-09
GR860872B (en) 1986-06-26
SE8703835D0 (en) 1987-10-05
FI851369A0 (en) 1985-04-04
ES553679A0 (en) 1986-12-01
WO1986005770A1 (en) 1986-10-09
DE3690150T1 (en) 1988-03-10
SU1479003A3 (en) 1989-05-07

Similar Documents

Publication Publication Date Title
EP0258228A1 (en) An apparatus for the purification of water, waste water in particular, by a biological oxidation method
JP3183406B2 (en) Methods and reactors for water purification
US4231863A (en) Method and apparatus for treating water
KR900002339B1 (en) Rotating biological contractor
US3956127A (en) Apparatus for establishing contact between a liquid and a gas
US4028244A (en) Apparatus for establishing contact between a liquid and a gas
US4351721A (en) Device for flushing and aerating a surface coated with microorganisms in a plant for biological purification of waste water
EP0931767A1 (en) Carrier-separating and water-collecting mechanism of wastewater treatment equipment
CN101041510A (en) External membrane bioreactor system for sewage treatment and method thereof
JPS63248499A (en) Treatment of waste water
JPS61271090A (en) Treating device for waste water using immobilized microorganism
KR100353004B1 (en) Biological Nutrient Removal Method using a Submerged Moving Media Intermittent Aeration Reactor and System
JP2886421B2 (en) High load activated sludge equipment
SU1373694A1 (en) Apparatus for biochemical cleaning of waste water
KR890005599Y1 (en) Rotating biological contactor for waste water treatment
JPH0760278A (en) Method for improving water quality of pond, lake, marsh, etc.
KR19990013462A (en) Sewage and Wastewater Treatment Method and Apparatus Using Inclined Plate Contact Biofilm Method
JPH0214118B2 (en)
SU1370091A1 (en) Device for biological cleaning of waste water
JPS61212390A (en) Septic device for sewage
JP2001047088A (en) Water quality improving apparatus
WO2004067457A1 (en) Sewage and sludge disposal equipment
KR900004435B1 (en) Rotating disk for treating water
RU2113415C1 (en) Device for biological purification of sewage
JP2886422B2 (en) High load activated sludge equipment

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19871003

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE FR IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19891003

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DUNDER, VILHO