AU2089295A - Creación de Inventos y Patentes con Inteligencia Artificial

AU2089295A – Biofilm carrier for water and waste water purification
– Google Patents

AU2089295A – Biofilm carrier for water and waste water purification
– Google Patents
Biofilm carrier for water and waste water purification

Info

Publication number
AU2089295A

AU2089295A
AU20892/95A
AU2089295A
AU2089295A
AU 2089295 A
AU2089295 A
AU 2089295A
AU 20892/95 A
AU20892/95 A
AU 20892/95A
AU 2089295 A
AU2089295 A
AU 2089295A
AU 2089295 A
AU2089295 A
AU 2089295A
Authority
AU
Australia
Prior art keywords
carrier element
carrier
water
walls
waste water
Prior art date
1994-03-16
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.)

Granted

Application number
AU20892/95A
Other versions

AU689246B2
(en

Inventor
Lars Ake Hans Gunnarsson
Anders Erik Lofquist
Asa Elsa Malmqvist
Thomas Gunnar Welander
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.)

Veolia Water Solutions and Technologies Support SAS

Original Assignee
Veolia Water Solutions and Technologies Support SAS
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.)
1994-03-16
Filing date
1995-03-15
Publication date
1995-10-03
Family has litigation

First worldwide family litigation filed
litigation
Critical
https://patents.darts-ip.com/?family=20393307&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2089295(A)
«Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1995-03-15
Application filed by Veolia Water Solutions and Technologies Support SAS
filed
Critical
Veolia Water Solutions and Technologies Support SAS

1995-10-03
Publication of AU2089295A
publication
Critical
patent/AU2089295A/en

1998-03-26
Application granted
granted
Critical

1998-03-26
Publication of AU689246B2
publication
Critical
patent/AU689246B2/en

2001-02-01
Assigned to KALDNES MILJOTEKNOLOGI AS
reassignment
KALDNES MILJOTEKNOLOGI AS
Alteration of Name(s) in Register under S187
Assignors: ANOX BIOSYSTEM AB

2006-06-22
Assigned to ANOXKALDNES AS
reassignment
ANOXKALDNES AS
Alteration of Name(s) in Register under S187
Assignors: KALDNES MILJOTEKNOLOGI AS

2011-02-03
Assigned to VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
reassignment
VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
Alteration of Name(s) in Register under S187
Assignors: ANOXKALDNES AS

2015-03-15
Anticipated expiration
legal-status
Critical

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

C—CHEMISTRY; METALLURGY

C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

C02F3/00—Biological treatment of water, waste water, or sewage

C02F3/02—Aerobic processes

C02F3/10—Packings; Fillings; Grids

B—PERFORMING OPERATIONS; TRANSPORTING

B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus

B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer

B—PERFORMING OPERATIONS; TRANSPORTING

B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus

B01J2219/30—Details relating to random packing elements

B01J2219/302—Basic shape of the elements

B01J2219/30223—Cylinder

B—PERFORMING OPERATIONS; TRANSPORTING

B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus

B01J2219/30—Details relating to random packing elements

B01J2219/304—Composition or microstructure of the elements

B01J2219/30466—Plastics

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

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

Y02W10/30—Wastewater or sewage treatment systems using renewable energies

Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy

Abstract

PCT No. PCT/SE95/00260 Sec. 371 Date Feb. 25, 1997 Sec. 102(e) Date Feb. 25, 1997 PCT Filed Mar. 15, 1995 PCT Pub. No. WO95/25072 PCT Pub. Date Sep. 21, 1995The invention refers to a carrier element to be used as a carrier for a microbial film in a biological water or waste water purification process in which the carrier elements are kept moving in the water. The surface of the carrier element is partly protected against collision with the surfaces of the other carrier elements. The carrier element has flow passages therethrough and is moreover designed to allow good flow of water therethrough also after a microbial film having been established on the surfaces. The carrier element has a length, width and/or height which exceeds 1.5 cm, and the protected area is larger than 100 m2/m3 of the volume of the carrier element. The cross-sectional area of the passage opening in the boundary surface towards the surroundings of the element comprises at least 35% of the boundary surface towards the surroundings of a homogenous body having the same dimensions. The invention also relates to the use of such carrier elements for the treatment of waste water from the wood-processing industry, the waste water containing at least 100 mg/l suspended matter as measured on a GF/A-filter, as well as a reactor for biological water or waste water purification, comprising a reactor tank (20) which contains carrier elements (25) according to the invention and wherein a grid (26) covering the bottom of the tank is provided over aerators (21) at said bottom.

Description

BIOFILM CARRIER FOR WATER AND WASTE WATER PURIFICATION

The invention relates to a biofilm carrier for water
or waste water purification.

In biological purification of water or waste water
the water is passed through some type of reactor wherein
micro-organisms are utilized to convert impurities existing
in the water to harmless end products such as carbon
dioxide and water. The purification i.a. can be performed
under supply of air (aerobically) or without supply of air
(anaerobically) . In order to increase the efficiency of the
purification a high content of active micro-organisms in
the process commonly is aimed at so that said organisms are
not allowed to escape with the purified water, either by
the micro-organisms being allowed to grow in suspension in
the reactor and being separated from the water in a

separation step after the reactor and being returned to the reactor (e.g. the activated sludge process) , or by some type of carrier material being introduced into the process, on the surfaces of which the micro-organisms can grow as a biofilm and thus can be maintained in the process (the biofilm process) .
The biofilm process has a number of advantages as compared with the activated sludge process and other processes with suspended biomass. Among other things higher loads can be used and the processes are substantially less sensitive to variations and disturbances. Most conventional biofilm processes are based on the purification reactor being packed with carrier material in the shape of filler bodies or blocks which are fixed to be stationary in the process. These process embodiments have the drawback that there is a risk of the carrier material being stopped by biomass or other particulate material and that dead zones
may be established in the process where the contact between the water and the active micro-organisms is very bad.

In another type of biofilm process a carrier material
is utilized which is held in suspension and movement in the
process. The carrier material with micro-organisms growing
thereon is maintained in the process by outgoing water
being allowed to pass through a strainer or grid having an
opening diameter or slot width which is so small that the
carrier material cannot pass therethrough. The advantage of
this type of process is i.a. that the risk for stopping of
the carrier material and the establishment of dead zones is
substantially reduced. Different types of carrier material
are available for this type of process: foamed rubber
pieces (EP-A-0 142 123) , rings of non-woven plastic

material (Haikangijutu Vol.29 (4) : pp 64-69, 1987) , and pieces of extruded plastic hoses the surface of which is enlarged by mechanical processing (Haikangijutu vol. 29 (4) : pp 64-69, 1987) , intermixing of material which provides a rough surface (Water Environment Research vol. 64 (7) :
pp 884-889) , or introduction of inside partitions and outside fins (WO-A-91/11396) . These materials have in common that they have a density which is close to the density of water so as to be easily held in suspension.
Although processes with carrier elements of these types often can be operated at high loads all prior art
embodiments of carrier elements have, however, drawbacks which substantially limit the capacity of the process, particularly in aerobic processes wherein the supply of oxygen to the working micro-organisms is of decisive importance for the purification efficiency. In foamed rubber pieces and rings of non-woven material the pores often are blocked by growing biomass so that the active surface in contact with waste water and air will be
reduced. The carrier elements which have been produced by extruding a plastic hose are small, < 1 cm, in order that the surface per volume will be large. Also in these elements the passages often are blocked, and also in case this does not happen it has been found that the supply of oxygen to the biofilm which in most cases is located on the inside surfaces of the carriers is heavily limiting for the process. Also, it has been found that the small size of these carrier elements causes difficult practical problems due to the fact that they will be caught by foam which is produced in the processes, and thus can be carried away from the process by the foam or the wind. Furthermore, there will often arise problems in treating waste water containing suspended particles, e.g. fibers, by the small openings in the strainers or grids holding back the carrier elements being blocked. For e.g. waste water carrying fibers in the forest industry these small carrier elements have been found to be directly unsuitable for this reason. So far it has not been possible to overcome these problems by making larger carrier elements because it has not been possible as far as prior art embodiments are concerned to provide a large carrier with a large surface for the biofilm, protected against wear, without the efficiency of the process being heavily reduced by a still greater oxygen limitation of the biofilm than in available small carriers. The purpose of the present invention is to overcome the said problems, and the invention relates to a carrier element for use as a carrier for microbial film in a biological water or waste water purification process wherein the carrier elements are kept moving in the water, the surface of the carrier element being partly protected against collision with the surfaces of other carrier elements and the carrier element having flow passages and moreover being designed to allow good flow of water therethrough also after a microbial film having been established on the surfaces. For said purpose the carrier element has obtained the characterizing features of claim 1 so as to combine a large size with a large surface protected against wear and with a very good flow of both water and air therethrough . The carrier element according to the invention therefore provides great advantages as compared with prior art carrier materials i . a . by a considerably greater supply of oxygen and by largely reduced risks for stopping of strainers or grids for retaining the carrier material . The invention also relates to the use of such carrier elements for the treatment of waste water from the wood- processing industry , the waste water containing at least 100 mg/ 1 suspended matter as measured on a GF/A- f ilter . Furthermore , the invention relates to a reactor for biological water and waste water purif ication using the carrier elements according to the invention . In order to explain the invention in more detail illustrative embodiments thereof will be described below reference being made to the accompanying drawings in which FIGS . 1 and 2 are perspective views of a f irst embodiment of the carrier element according to the invention as seen from one and the other end , respectively, FIG . 3 is an end view of the carrier element in FIGS . 1 and 2 as seen from the same end as in FIG . 1 , FIG . 4 is an end view of the carrier element in FIGS . 1 and 2 as seen from the same end as in FIG . 2 , FIGS . 5 and 6 are corresponding perspective views as FIGS . 1 and 2 of a second embodiment , FIGS . 7 and 8 are corresponding perspective views as FIGS . 1 and 2 of a third embodiment , and FIG . 9 is a diagrammatic perspective view of a reactor wherein the carrier elements can be used . The carrier element in all embodiments shown can be described generally as a number of walls arranged and interconnected in such a manner that a large portion of the total surface of the walls is protected against wear against the surfaces of other bodies, that there are free passages for the flow through the carrier element, and that the total cross-sectional area of the passages in the boundary surface towards the surroundings of the carrier element is large. The carrier element in FIGS. 1 to 4 thus comprises twelve equally distributed radial inside walls 11 and 12 which extend axially from one end of the carrier element to the other end thereof. The walls comprise alternating radially longer walls 11' and radially shorter walls 12. The walls are interconnected by means of an outside ring 13 at one end of the carrier element and an inside ring 14 at the other end of the carrier element radial windows 15 being bounded by the walls. The carrier element thus has a structure similar to a turbine wheel. Suitably the carrier element consists of plastics or composite and then can be manufactured by injection moulding. In order that necessary draught shall be provided the envelope surface tapers slightly conically and the walls has a thickness which diminishes from one end of the carrier element to the other end thereof as shown in the drawings. It is possible, however, to make the carrier element of another material than plastics or composite. The carrier element forms several axial passages 16 between the walls and moreover is completely open at the center at 17 to allow an unobstructed flow axially straightly through the element from one end thereof to the other end thereof . The linear length of the element and the diameter thereof are both preferably about 3.2 cm. Generally the length and diameter of the carrier element (width and/or height) should be more than 1.5 cm and preferably ranges from 2.5 to 10 cm, particulary within the interval from 3 to 5 cm. Walls 11 and 12 form protected surfaces i.e. surfaces which are protected against wear by collision with other carrier elements, and on these surfaces a microbial film can grow in the biological water purification process. The totally protected surface should be larger than 100 m2/m3 volume of the carrier element, preferably larger than 200 m2/m3, particulary larger than 275 m2/m3. If the carrier elements are designed so as to have a very large surface, >500 m2/m3, it can, however, be difficult to avoid that the passages through the carrier element will be so narrow that they are stopped by the growth.
In aerobic processes it is customery to use carrier elements having a density close to the density of water, but according to the invention it has been found that it is advantageous to use carrier elements having a higher density due to the fact that carrier elements having a density close to the density of water without resistance will be carried along by the flowing water and rapidly will escape from raising air bubbles; it follows that water easily will be stationary inside the elements and that air seldom will pass through the inner passages of the carrier element. Carrier elements having a higher density on the contrary tend to move down into the water and resist water and air flow upwards in the process so that water and air will be forced through the inner passages of the carrier element the biofilm being supplied with oxygen. At the same time the air bubbles will be broken down into smaller bubbles, which also increases the transfer of oxygen from air to water. The flow through the carrier elements will be increased at increased density of the carrier element but at densities which are too high, >1.40 kg/dm , the
agitation of the material in the process will be made difficult so that the total efficiency of the process will be reduced. Very good efficiency has been obtained at a density of the carrier elements ranging from 1.20 to 1.30 kg/dm3 where the flow through the carrier elements is high and the mixing is still good. The high density combined

with the size eliminates also the risk of the carrier elements being removed from the process by the foaming easily arising at strong aeration.
The combination of size, surface, open structure and density as described above provides a carrier element having considerably improved properties in an aerobic purification process than carrier elements available so far.
The carrier element according to the invention has also been found to have good properties in anaerobic or anoxic purification steps wherein the carrier elements can be kept moving for example by mechanical stirring. In these systems it is also an advantage to choose a density near the density of water in order to avoid high energy supply in order to keep the carriers moving.
These carrier elements have beeen found to provide very good results in purification of different types of waste water. Particularly the carrier element has been found to provide great advantages in treating waste waters from the wood-processing industry, containing fibers and other particles. By the relatively large size of the carrier element grids having a large slot width can be used for retaining the carrier elements and it has been possible to avoid all problems relating to stopping by fibers etc. Many wood-processing industries which intend to intrduce biological purification have already only mechanical purification provided by sedimentation basins for
separating fibers etc. A biological process with suspended carrier elements according to the invention can be
performed prior to the existing sedimentation because fibers unobstructedly pass through the process. Both fibers and the surplus of biomass produced in the process then can be separated in the existing sedimentation so that no further separation step need to be installed. In some cases a coarse separation of large particles such as chips or

bark pieces may be necessary prior to the biological process but in that case it is the question of a
substantially simpler and cheaper separation than a
sedimentation .
A very important feature of the invention is that a large part of the bounding surface towards the surroundings of the carrier element is open for passage of water and air in and out. The cross-sectional area of the passage
openings in the bounding surface towards the surroundings of the carrier element then could comprise at least 35 %, preferably at least 40 %, particularly at least 50 % of the boundary surface towards the surroundings of a homogenous body having the same dimensions .
Particularly advantageous embodiments of the
invention in order to satisfy the requirement of a large cross-sectional area of the openings of the passages are such embodiments wherein the carrier element is open for flow therethrough in all three dimensions. The embodiment of FIGS. 1 to 4 is such a preferred embodiment wherein the water can flow freely through the carrier element .
The embodiment in FIGS. 5 and 6 differs from the embodiment disclosed in FIGS. 1 to 4 by an axial tube 18 which is provided in the center of the carrier element and the outside surface of which is connected with walls 11 all having the same radial length. At one end of the carrier element there are alternatingly walls 19 and openings for the axial passages 16, the other end being completely open.
In the embodiment of the invention shown in FIGS. 7 and 8 helical walls 11′ and 12′ are provided producing a rotational movement of the carrier element at the flow of water therethrough so that the supply of oxygen to the biofilm will be further intensified.
The carrier elements are held suspended in the water or waste water to be purified biologically in a reactor wherein air is supplied by means of aerators at the bottom

of the reactor as shown in FIG. 9 wherein the reactor tank is designated 20 and aerators at the bottom thereof are designated 21. The water surface in the tank is designated 22. The water is supplied to the tank at the top thereof at 23 and is drained at the bottom via an outlet 24. The carrier elements suspended in the water are designated 25.
A problem which may arise in processes with suspended carrier elements is that aerators must be changed or repaired. The aerators in conventional tanks are difficult to reach because the tank is filled with large amounts of carrier material which sediments on the bottom of the tank when the water is drained. When carrier elements according to the present invention are used this problem can be avoided by the tank being provided with a grid 26 covering the bottom above the aerators 21 at such level that access is provided below the grid to reach the aerators . The grid should have such a slot width that the carrier elements 25 cannot pass therethrough. When the water is being emptied from the tank the carrier elements will settle on the grid and it is then possible to enter into the space below the grid, e.g. through a man-whole 27. This solution of the problem is possible because the carrier elements according to the invention are made so large that a grid can be used which has a sufficient large slot width in order that the air can unobstructedly pass therethrough.
Grid 26 is also used as an outlet grid in order to retain the carrier elements in the process by outgoing water being passed through the grid and then through outlet 24 arranged as a riser. Due to the bottom grid 26 being used as an outlet grid there is no need for a further grid in order to prevent the carrier elements from being carried along by the outgoing water out of the tank. Moreover the risk of stopping of grid 26 is very small because the grid will be continously rinsed by the air flowing from below through the grid upwards into the tank.

Claims (14)

1. Carrier element for use as a carrier for microbial film in a biological water or waste water purification process wherein the carrier elements are kept moving in the water, the surface of the carrier element being partly protected against collision with the surfaces of other carrier elements and the carrier element having flow passages and moreover being designed to allow good flow of water therethrough also after a microbial film having been established on the surfaces, c h a r a c t e r i z e d in that the carrier element has a length, width and/or height exceeding 1.5 cm, preferably in the interval ranging from 2.5 to 10 cm, particularly in the interval ranging from 3 to 6 cm, that the protected surface is larger than
100 m /m carrier element volume, preferably larger than 200 m /m carrier element volume, particularly larger than 275 m /m carrier element volume, and that the cross-sectional area of the passage openings in the boundary surface towards the surroundings of the element is at least 35 %, preferably at least 40 %, particularly at least 50 % of the boundary surface towards the surroundings of a homogenous body having the same dimensions.

2. Carrier element as in claim c h a r a c t e ri z e d in that the passage openings in the boundary surface of the element are arranged such that water and air can flow into the element from all directions.

3. Carrier element as in claim 1 or 2,
c h a r a c t e r i z e d in that the carrier element is criss-crossed by passages (15, 16, 17, 18) in such a manner that water can flow through the element in all three dimensions.

4. Carrier element as in any of claims 1 to 3, c h a r a c t e r i z e d in that it is built up of
radially directed walls (11, 12, 11′, 12′) which are interconnected to a structure similar to a turbine wheel and open centrally.

5. Carrier element as in claim 4, c h a r a c t e ri z e d in that the walls (11, 12, 11′, 12′) are
interconnected by means of an annular portion (13, 14) at each end of the carrier element.

6. Carrier element as in claim 4 or 5,
c h a r a c t e r i z e d in that the walls (11, 12) are interconnected centrally by means of a tube (18) centrally of the carrier element.

7. Carrier element as in any of claims 4 to 6, c h a r a c t e r i z e d in that the passages between the walls (11, 12) at one end of the carrier element are alternatingly open and closed by means of walls (19).

8. Carrier element as in any of claims 4 to 7, c h a r a c t e r i z e d in that the walls (11, 12, 11′, 12′) have alternatingly greater and smaller radial length.

9. Carrier element as in any of claims 1 to 8, c h a r a c t e r i z e d in that the walls (11′,, 12′) are helical.

10. Carrier element according to any of claims 1 to 9, c h a r a c t e r i z e d in that the density of the carrier element is in the interval ranging from 0.92 to 1.40 kg/dm3, preferably in the interval ranging from 0.94 to 1.35 kg/dm3, particularly in the interval ranging from 1.10 to 1.30 kg/dm3.

11. Carrier element as in any of claims 1 o 10 c h a r a c t e r i z e d in that the carrier element is made by injection moulding of plastics or composite.

12. Use of the carrier element as in any of claims 1 to 11 for treatment of waste water from the wood-processing industry containing at least 100 mg/1 suspended matter as measured on a GF/A filter.

13. Reactor for biological water or waste water purification comprising a tank (20) containing suspended carrier elements (25) c h a r a c t e r i z e d in that a grid (26) covering the bottom and having a slot width which is smaller than the smallest outside dimension of the carrier element is provided under the portion of the tank receiving the carrier elements, spaced from the bottom of the tank a distance which allows access to the space under the grid when the water has been drained from the tank.

14. Reactor as in claim 13 c h a r a c t e r i z e d in that the grid (26) is provided as an outlet grid for separating the carrier elements (25) from water which is drained from the tank via a bottom outlet (24).

AU20892/95A
1994-03-16
1995-03-15
Biofilm carrier for water and waste water purification

Expired

AU689246B2
(en)

Applications Claiming Priority (3)

Application Number
Priority Date
Filing Date
Title

SE9400893

1994-03-16

SE9400893A

SE517400C2
(en)

1994-03-16
1994-03-16

Biofilm carrier for water and wastewater treatment

PCT/SE1995/000260

WO1995025072A1
(en)

1994-03-16
1995-03-15
Biofilm carrier for water and waste water purification

Publications (2)

Publication Number
Publication Date

AU2089295A
true

AU2089295A
(en)

1995-10-03

AU689246B2

AU689246B2
(en)

1998-03-26

Family
ID=20393307
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

AU20892/95A
Expired

AU689246B2
(en)

1994-03-16
1995-03-15
Biofilm carrier for water and waste water purification

Country Status (18)

Country
Link

US
(1)

US6126829A
(en)

EP
(1)

EP0750591B2
(en)

JP
(1)

JPH09510142A
(en)

CN
(1)

CN1142895C
(en)

AT
(1)

ATE181903T1
(en)

AU
(1)

AU689246B2
(en)

CA
(1)

CA2185467C
(en)

DE
(1)

DE69510661T3
(en)

DK
(1)

DK0750591T4
(en)

ES
(1)

ES2135718T5
(en)

FI
(1)

FI119323B
(en)

GR
(1)

GR3031334T3
(en)

NO
(1)

NO314255B3
(en)

NZ
(1)

NZ282932A
(en)

PL
(1)

PL316241A1
(en)

RU
(1)

RU2119893C1
(en)

SE
(1)

SE517400C2
(en)

WO
(1)

WO1995025072A1
(en)

Families Citing this family (60)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

SE508478C2
(en)

1997-03-03
1998-10-12
Anox Ab

Ways to improve wastewater treatment in biological aerated ponds

JP2000185293A
(en)

1998-12-22
2000-07-04
Sumitomo Heavy Ind Ltd
Biological filter apparatus

KR100366484B1
(en)

1999-12-11
2003-01-14
주식회사 이래화학
Copolyester resin composition and a process of preparation thereof

US6444126B1
(en)

2000-09-19
2002-09-03
T. M. Gates, Inc.
System and method for treating sanitary wastewater for on-site disposal

FR2821345B1
(en)

2001-02-27
2003-11-14
Degremont

PROCESS FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER IN MIXED CROPS

US6726838B2
(en)

2002-01-07
2004-04-27
Agwise Wise Water Technologies Ltd.
Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier

JP2003010875A
(en)

2001-07-02
2003-01-14
Mitsubishi Rayon Co Ltd
Microorganism immobilized carrier

SE521148C2
(en)

2002-02-18
2003-10-07
Kaldnes Miljoeteknologi As

Process for biological purification of water in a reactor containing carrier for biofilm growth

DE10231217B4
(en)

2002-07-03
2005-12-22
Arno Stöhr

Filling and / or vegetation body made of plastic

DE10259915A1
(en)

2002-12-20
2004-07-15
Ballies, Uwe, Dr.med.

Filter element for a clarifier for the biological purification of water

ITPD20030055A1
(en)

2003-03-18
2004-09-19
Acqua Minerale S Benedetto S P A

SUPPORT FOR BIOFILM TO BE USED IN PURIFICATION PLANTS

WO2005007819A2
(en)

2003-07-09
2005-01-27
Wisconsin Alumni Research Foundation
Charge-dynamic polymers and delivery of anionic compounds

US20070102354A1
(en)

2005-10-26
2007-05-10
Flournoy Wayne J
System for treating wastewater and a media usable therein

WO2006058097A1
(en)

2004-11-22
2006-06-01
Entex Technologies Inc.
System for treating wastewater and a controlled reaction-volume module usable therein

DE102004062915A1
(en)

2004-12-22
2006-03-30
Ondeo Industrial Solutions Gmbh
Carrier for keeping water or waste water in motion in biological purification or treatment plant, providing high material conversions, with microbial layer growth surface and structured external surface

US7468134B2
(en)

2005-01-10
2008-12-23
Hung Hoang
See-thru self cleaning biological filter system for aqua-culture

WO2007017529A1
(en)

2005-08-09
2007-02-15
Universidad De Oviedo
Micro-organism carrier for use in fluid-bed wastewater treatment plants

ES2323038B1
(en)

2005-08-09
2010-04-28
Cesar Universidad De Oviedo

CARRIER OF MICROORGANISMS FOR USE IN WATER RESIDUAL WATER CLEANING STATIONS.

US20070114182A1
(en)

2005-11-18
2007-05-24
Hydroxyl Systems Inc.
Wastewater treatment system for a marine vessel

CN100412192C
(en)

2006-09-28
2008-08-20
武汉益生泉生物科技开发有限责任公司
Artificial biological film and preparation method

US8834918B2
(en)

2007-01-22
2014-09-16
Wisconsin Alumni Research Foundation
Modified multilayered film

JP2008183501A
(en)

2007-01-29
2008-08-14
Anemosu:Kk
Fluid mixer

EP2119499A1
(en)

2008-04-28
2009-11-18
Dytras, S.A.
Biofilm carrier used in waste water purification

US7976703B2
(en)

2008-05-06
2011-07-12
Cheng-Fang Lin
Treating unit for simultaneous removal of carbon and nitrogen from wastewater and treating apparatus having the same

US8241717B1
(en)

2008-08-20
2012-08-14
SepticNet Inc.
Carbon-based biofilm carrier

US8753511B2
(en)

2008-09-03
2014-06-17
AQ-WISE—Wise Water Technologies Ltd.
Integrated biological wastewater treatment and clarification

US8088278B2
(en)

2008-10-27
2012-01-03
David Poltorak
Wastewater filtering medium

EP2251308A1
(en)

2009-05-14
2010-11-17
GLV Finance Hungary Kft.
Carrier element and biological water treatment system

US8568593B1
(en)

2009-06-02
2013-10-29
Entex Technologies, Inc.
Anoxic system screen scour

NO329665B1
(en)

2009-06-03
2010-11-29
Biowater Technology AS

Process and reactor for treatment of water

DE102009045032A1
(en)

2009-09-25
2011-03-31
Invent Umwelt-Und Verfahrenstechnik Ag

Process and apparatus for the biological purification of wastewater

US8758613B2
(en)

2009-10-16
2014-06-24
Aqwise-Wise Water Technologies Ltd
Dynamic anaerobic aerobic (DANA) reactor

RU2012120836A
(en)

2009-11-16
2013-12-27
Тритек 21 Индастрис Лтд.

MULTI-STAGE BIOLOGICAL REACTOR

BE1019195A4
(en)

2010-02-24
2012-04-03
M H C N V

METHOD OF PURIFYING WASTE WATER.

WO2012087151A1
(en)

2010-12-22
2012-06-28
Biowater Technology AS
Carrier element for purification of water

DE102010061613A1
(en)

2010-12-29
2012-07-05
Holger Blum

Process for the aerobic purification of wastewater

PT2508488E
(en)

2011-04-04
2015-10-12
Veolia Water Solutions & Tech
Improved biological waste water purification reactor and method

US8764976B2
(en)

2011-08-12
2014-07-01
Veolia Water Solutions & Technologies Support
Biological wastewater system having a screen structure for confining biofilm carriers to a reactor forming a part of the system

US9693537B2
(en)

2011-12-08
2017-07-04
Pentair Water Pool And Spa, Inc.
Aquaculture pump system and method

JP5865097B2
(en)

2012-01-30
2016-02-17
株式会社クボタ

Filter media for water treatment and septic tank

WO2013149662A1
(en)

2012-04-04
2013-10-10
Hera S.P.A.
Inoculated bioplastic-based moving bed biofilm carriers

KR20150032567A
(en)

2012-06-28
2015-03-26
비오피페 티알 세브레 테크놀로질레리 에이에스
Wastewater treatment unit and method

US20140166574A1
(en)

2012-12-19
2014-06-19
Alexander Fassbender
Biofilm carriers and biological filtration systems including the same

WO2014152926A1
(en)

2013-03-14
2014-09-25
Pentair Water Pool And Spa, Inc.
Carbon dioxide control system for aquaculture

US10219491B2
(en)

2013-03-15
2019-03-05
Pentair Water Pool And Spa, Inc.
Dissolved oxygen control system for aquaculture

WO2014148942A1
(en)

2013-03-22
2014-09-25
Petropavlovskii Aleksei Andreyevich
Biofilter

RU2555881C2
(en)

2013-08-21
2015-07-10
Общество с ограниченной ответственностью НАУЧНО-ПРОИЗВОДСТВЕННАЯ ФИРМА «ЭТЕК ЛТД»
Floating polymer load element for biological treatment of effluents

CN103626285B8
(en)

2013-11-14
2016-08-03
广州市赛特检测有限公司
A kind of Spiral strip filler

FR3018208B1
(en)

2014-03-05
2016-10-14
Aliaxis R&D S A S

METHOD FOR MANUFACTURING A FASTENING BRACKET AND FIXING BRACKET FOR BACTERIA

USD827765S1
(en)

2015-03-30
2018-09-04
Stuart J Ward
Moving bed biofilm reactor media

CN105347466A
(en)

2015-11-20
2016-02-24
清勤水处理科技（上海）有限公司
Three-dimensional filling material used for wastewater treatment

EP3338885A1
(en)

2016-12-23
2018-06-27
Fundacion Gaiker
Carrier device

RU173774U1
(en)

2017-04-12
2017-09-11
федеральное государственное бюджетное образовательное учреждение высшего образования «Волгоградский государственный аграрный университет» (ФГБОУ ВО Волгоградский ГАУ)

DEVELOPMENT OF BIOLOGICAL WASTE WATER TREATMENT

US11124437B2
(en)

2017-07-10
2021-09-21
Tailwater Systems, Llc
System and apparatus for a mobile, modular agricultural bioreactor, and methods related thereto

DE102018100337A1
(en)

2018-01-09
2018-03-29
Christian Stöhr GmbH & Co. Elektro- und Kunststoffwaren KG

Filling and / or vegetation body

USD872224S1
(en)

2018-05-14
2020-01-07
Nexom Inc.
Biogrowth support media

TR201921186A2
(en)

2019-12-23
2021-07-26
Tuerkiye Bilimsel Ve Teknolojik Arastirma Kurumu Tuebitak

Carrier element and carrier element modification method for wastewater treatment

CN112607853A
(en)

2020-11-26
2021-04-06
湖南鑫远环境科技股份有限公司
Biofilm reactor based on MBBR (moving bed biofilm reactor) process and preparation method thereof

CN112655642B
(en)

2020-12-21
2023-10-24
武汉市农业科学院
Novel flowing water culture tank aeration pushes away water device

NL2028515B1
(en)

2021-06-22
2022-12-29
Im Aces B V
A method to treat liquid manure

Family Cites Families (18)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US578548A
(en)

1897-03-09

Lotjis deruelle

BE581152A
(en)

1958-07-29

US3219324A
(en)

1960-08-01
1965-11-23
Universal Oil Prod Co
Apparatus for interphase contact between fluids

GB1439745A
(en)

1972-05-23
1976-06-16
Hydronyl Ltd
Biological filter packing element

US3956128A
(en)

1973-07-16
1976-05-11
Degremont, S.A.
Apparatus for treating industrial and domestic waste waters

ZA762830B
(en)

1975-05-21
1977-04-27
Norton Co
Trickling filters media for biological filters

GB1537882A
(en)

1976-04-15
1979-01-10
Acalor Int Ltd
Random packing materials

GB2024698B
(en)

1978-06-12
1982-09-15
Przedsieb Wdrazania Upowszech
Forming elements having projections

FI62274C
(en)

1981-02-20
1982-12-10
Aaltosen Tehtaat Oy

FYLLKROPP FOER BIOFILTER ELLER FOER ANVAENDNING VID AEMNESOEVERFOERING

DE3221128A1
(en)

1982-06-04
1983-12-08
Paul Rauschert Gmbh & Co Kg, 8644 Pressig

RING SHAPED FILL BODY FOR GAS LIQUID CONTACT

US4600544A
(en)

1982-11-29
1986-07-15
Merix Corporation
Packing unit and method of making

US4731205A
(en)

1986-09-08
1988-03-15
Koch Engineering Company, Inc.
Random packing for fluid contact devices and method of preparing said packing

US4749493A
(en)

1986-10-07
1988-06-07
Hicks Charles E
Method and apparatus for oxygenating water

US4810385A
(en)

1987-05-12
1989-03-07
Sybron Chemicals, Inc.
Device for seeding bacterial cultures to systems to assist in biodegrading waste

US4806288A
(en)

1987-09-23
1989-02-21
Nowosinski George B
Packing elements

JPH02211292A
(en)

1989-02-09
1990-08-22
Nkk Corp
Microorganism attracting particle

DK0575314T3
(en)

1990-01-23
1994-11-14
Kaldnes Miljoteknologi As

Process and reactor for purifying water

FR2689494B1
(en)

1992-04-03
1994-06-24
Cise

PROCESS AND DEVICE FOR THE PURIFICATION OF WASTE WATER BY BIOLOGICAL WAY.

1994

1994-03-16
SE
SE9400893A
patent/SE517400C2/en
not_active
IP Right Cessation

1995

1995-03-15
DE
DE69510661T
patent/DE69510661T3/en
not_active
Expired – Lifetime

1995-03-15
DK
DK95913465T
patent/DK0750591T4/en
active

1995-03-15
AT
AT95913465T
patent/ATE181903T1/en
active

1995-03-15
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AU20892/95A
patent/AU689246B2/en
not_active
Expired

1995-03-15
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PL95316241A
patent/PL316241A1/en
unknown

1995-03-15
JP
JP7523980A
patent/JPH09510142A/en
active
Pending

1995-03-15
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NZ282932A
patent/NZ282932A/en
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IP Right Cessation

1995-03-15
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RU96119945A
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1995-03-15
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US08/702,715
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Expired – Lifetime

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CNB951927612A
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Expired – Lifetime

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EP95913465A
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1995-03-15
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PCT/SE1995/000260
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EP0750591B2
(en)

2007-05-02

RU2119893C1
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1998-10-10

DE69510661D1
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1999-08-12

FI119323B
(en)

2008-10-15

GR3031334T3
(en)

1999-12-31

US6126829A
(en)

2000-10-03

NO963859L
(en)

1996-11-13

CA2185467A1
(en)

1995-09-21

ATE181903T1
(en)

1999-07-15

DE69510661T3
(en)

2007-12-06

CN1146758A
(en)

1997-04-02

NO314255B1
(en)

2003-02-24

EP0750591A1
(en)

1997-01-02

DK0750591T3
(en)

2000-01-24

PL316241A1
(en)

1997-01-06

WO1995025072A1
(en)

1995-09-21

ES2135718T5
(en)

2007-12-01

DK0750591T4
(en)

2007-09-03

AU689246B2
(en)

1998-03-26

JPH09510142A
(en)

1997-10-14

SE9400893L
(en)

1995-09-17

DE69510661T2
(en)

1999-10-21

FI963601A0
(en)

1996-09-12

NZ282932A
(en)

1997-03-24

EP0750591B1
(en)

1999-07-07

NO963859D0
(en)

1996-09-13

CN1142895C
(en)

2004-03-24

SE9400893D0
(en)

1994-03-16

NO314255B3
(en)

2011-01-10

SE517400C2
(en)

2002-06-04

CA2185467C
(en)

2007-09-18

FI963601A
(en)

1996-09-12

ES2135718T3
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1999-11-01

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