ZA200205320B - Method and device for effluent treatment. - Google Patents
Method and device for effluent treatment. Download PDFInfo
- Publication number
- ZA200205320B ZA200205320B ZA200205320A ZA200205320A ZA200205320B ZA 200205320 B ZA200205320 B ZA 200205320B ZA 200205320 A ZA200205320 A ZA 200205320A ZA 200205320 A ZA200205320 A ZA 200205320A ZA 200205320 B ZA200205320 B ZA 200205320B
- Authority
- ZA
- South Africa
- Prior art keywords
- flushing
- dead
- membrane filtration
- filtration unit
- filtrate
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 53
- 239000002351 wastewater Substances 0.000 claims description 22
- 239000000706 filtrate Substances 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 17
- 238000005374 membrane filtration Methods 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 10
- 238000005352 clarification Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 5
- 239000012459 cleaning agent Substances 0.000 claims description 4
- 239000000645 desinfectant Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 3
- 239000008394 flocculating agent Substances 0.000 claims description 2
- 238000001471 micro-filtration Methods 0.000 claims description 2
- 238000000108 ultra-filtration Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000001914 filtration Methods 0.000 description 10
- 238000004062 sedimentation Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/16—Feed pretreatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/06—Specific process operations in the permeate stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F3/04—Aerobic processes using trickle filters
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
+ The invention relates to a method for waste water purification, in which the waste water which is to be purified is biologically purified and the outflow from the fixed bed is subjected to dead-end membrane filtration, whereas the retained solids are removed by back-flushing; and to a corresponding apparatus.
In countries where water resources are scarce, waste water represents an important potential source of non-drinkable water. Replacing fresh water with purified waste water on the one hand allows better utilization of the water reserves which there are and on the other hand the natural water sources are retained for use as drinking water. To ensure safe reuse of purified waste water, in particular of communal waste water, however, a number of fundamental requirements must be satisfied.
One requirement is that the residual contamination from organic pollutants be as low as possible. According to the prior art, this is achieved in a technically simple manner with the aid of a fixed bed, such as for example with trickling or percolating filter stages, which on account of their simple structure are particularly suitable for industrially relatively undeveloped regions of the world. The second, even more important requirement, which cannot satisfactorily be fulfilled with a fixed bed, relates to the hygiene quality of the treated waste water, since waste water represents a major source of spreading infectious diseases.
According to the prior art, although the outflow quality from a fixed bed can be improved by the use of sand filters, the filtrate quality is still not adequate for reuse. In addition, a large amount of chlorine has to be metered in for hygiene reasons, which may contribute to hazardous organochlorine substances (THM) being formed.
From US-A-5 230 803 a method and an apparatus for the purification of waste water is known in which the waste water is biologically purified in a fixed bed and then subjected to dead end filtration.
It is an object of the present invention to purify waste water using a fixed bed in such a manner that the abovementioned drawbacks are avoided and the quality of the purified waste water allows it to be reused as non-drinkable water, in particular for irrigation purposes.
The method according to the invention is characterized in Claim 1. The corresponding apparatus is characterized in Claim 5.
Amended Sheet - 2003-08-27
, - A400647.WO English translation of originally filed WO-Application . 5 20 2. =
Both microfiltration membranes and ultrafiltration membranes can be used for dead-end membrane filtration. On account of this operating mode, and since the membranes retain solids, during filtration the solids concentration in the membrane module or membrane modules of the membrane filtration unit rises. These solids are, preferably periodically, flushed off the membrane surface by means of dedicated devices and removed from the system.
The invention can be used irrespective of the type of membrane modules (tubular, cush- ion, plate and hollow-fibre modules) employed.
Further advantageous embodiments of the apparatus according to the invention are given in the dependent claims.
Membrane filtration after a biological waste water treatment offers the following advan- tages: - membranes represent an absolute barrier according to the appropriate pore diameter, - suspended organic solids are completely retained and the outflow is particle-free, - pathogenic germs are reliably eliminated, and the number of virus particles is also re- duced to a decisive extent, - in terms of hygiene quality, the outflow from the unit satisfies the WHO requirements for unrestricted irrigation purposes.
Moreover, filtration using the dead-end principle has the advantage that the outlay on en- ergy compared to membrane filtration in cross-flow mode is low and that a dead-end membrane filtration unit takes up less space than final sedimentation tanks and sand fil- ters, which are usually arranged downstream of a fixed bed, in particular a trickling filter stage.
In addition, the purified waste water (filtrate) can be used for periodic back-flushing, so that the freshwater consumption is reduced considerably.
In order for the module to be cleaned more successfully, the back-flushing is assisted by the introduction of gas, in particular air. A vertical arrangement of modules in this case effects uniform and more effective distribution and mixing of flushing air and liquid.
At least some of the flushing liquid, which has a high solids content, is fed to a primary clarification stage connected upstream of the fixed-bed reactor.
Alternatively, or for a partial stream of the flushing liquid, it is possible for the fiushing liquid produced during the back-flushing to be drained off as excess sludge. It is thus possible to relieve the load on the primary clarification stage of the fixed bed.
Adding flocculants to the outflow from the fixed bed leads to the solids agglomerating to form larger flocs, so that the waste water can be filtered more easily and the modules of the membrane filtration unit can be back-flushed more successfully.
The cleaning of the membranes is carried out in a time-saving and cost-effective manner during the back-flushing, by metering in cleaning agents and/or disinfectants.
When the outflow from the fixed bed, in order for solids to be separated out, is fed to a final sedimentation stage and then to the dead-end membrane filtration, the filtration capacity is increased on account of the lower solids concentration in the waste water and the intervals between back-flushing operations and cleaning operations are extended. As a result, a final sedimentation stage which is already present can be incorporated in the method according to the invention.
The invention is explained by way of example with reference to the figure, which illustrates the integration of a membrane filtration unit, referred to below as filtration unit for short, in a clarification unit.
Amended Sheet — 2003-08-27
The filtration unit 2 is used to treat the biologically purified waste water. In this clarification unit, the crude waste water 6 passes through a rake mechanism 30, a grit basin 31 and a primary clarification tank 4, which is designed as an Imhoff tank with sludge drain 7. The waste water 8, which has undergone preliminary settling, is fed to the trickling filter reactor 1 with the filter bed 11. The outflow 12 from the trickling filter reactor 1 is removed in constant amounts from a shaft (not shown) directly beneath the trickling filter reactor 1 and/or directly, via a line 36, from a final sedimentation tank 22 using a submersible pump 26. The outflow 12 passes into the flocculation tank 23, into which flocculant is metered from a flocculant vessel 25 by means of a metering pump 34. The filtration unit 2 is fed from this flocculation tank 23 via a centrifugal pump 13.
The line for feed 35 can be blocked by means of shut-off cock 20 during the back-flushing.
At the upper end of the filter module 14 there is a two-way valve 19 (flushing water valve).
During filtration, the flushing water valve 19 is closed, so that the so-called “dead end” is formed. Since the membrane of the filter module 14 retains solids, an additional filter layer of suspended solids is formed. The filtrate 15 passes radially through the membrane and flows through the filtrate valve 18 into the filtrate vessel 3. The filtrate 15 flows over a flowmeter (not shown) and is collected in a filtrate vessel 3. The filtrate can be drained off via the filtrate outlet 21.
During the back-flushing, filtrate is forced into the filter module 14 in the reverse direction by means of a back-flushing pump 17 which is situated in the filtrate vessel 3 and is designed, for example, as a submersible pump. A three-way valve (filtrate valve 18) switches between the two directions of flow. The flushing water valve 19 is opened during the back-flushing in order to discharge the flushing water 16. The amount of flushing water 16 can be determined using the flowmeter 32.
Before the back-flushing, a better cleaning action can be achieved by draining the liquid out of the filter module 14 during the subsequent back-flushing. During this draining, the shut-off cock 20 is closed and the flushing water valve 19 and the shut-off cock 37 are open.
Amended Sheet - 2003-08-27
‘ - A400647.WO English translation of originally filed WO-Application . a R 3 20
The required back-flow rate of 0,5 -1 in the trickling filter reactor 1 can be achieved, in order to ensure hydraulic discharge of the biomass, by returning the flushing water 16 to the primary clarification tank 4.
By modifying the back-flushing, it was possible to eliminate the original problems of the modules becoming blocked, which were caused by high solids contents in the waste wa- ter.
The modified back-flushing is distinguished by combined flushing with air and water. In this modified arrangement, large amounts of air are blown into the module on the feed side before the back-flushing and during the back-flushing. As a result, the solid cake is loosened and can be removed more easily. For this purpose, an inlet for flushing air 27 is situated in front of the module entry. Through this inlet, in back-flushing mode auxiliary air can be blown in by means of compressor 28, in addition to the feed stream. With suitable membranes, it is also possible for air to be introduced on the filtrate side.
The filter module 14 may be arranged horizontally, but to provide better distribution of the flushing air 27 may also be arranged vertically. In the latter arrangement, with the modified back-flushing using the following mode of operation, no blockages were recorded even with high levels of solids: - 20 - 30 min. production time (filtering) - 20 sec. forward flushing with feed - 20 sec. filtrate back flushing - 20 sec. filtrate back-flushing and forward flushing with feed + air mixture.
The simultaneous use of chemicals further improves the back-flushing. In this way, the inorganic, organic and biological fouling of the membrane can additionally be greatly re- duced.
Various chemicals in various concentrations can be used depending on the nature and intensity of the fouling. In the unit illustrated in the figure, an acid back-flushing with subsequent hypochlorite flushing has proven extremely effective.
During the chemical back-flushing, chemical cleaning agent and/or disinfectant 29 is metered into the back-flushing stream via a diaphragm pump 33. The duration of and intervals between the chemical back-flushing are adjustable and depend on the degree of contamination of the waste water and the ambient temperature.
The unit which has been described by way of example also has the following features:
The outflow from the trickling bed reactor 1 contains 80-100 mg.I"" of substances which can be filtered out and has a COD of 100-150 mg.I"* The outflow from the final sedimentation tank 22 contains 10 - 60 mg." of substances which can be filtered out and a COD of 55-90 mg.I"". The flocculation time is 15-20 min. A peristaltic pump is used as metering pump 34 for the flocculant.
The filtration unit 2 comprises a filter module 14 with a total membrane surface area of 5.1 m? The membrane material is PVDF (Polyvinylidene fluoride).
On account of prior knowledge gained from laboratory tests, the filtrate stream is kept constant during production. The rising membrane resistance is compensated for by increasing the feed pressure. The mean feed pressure is preferably from 0.3 to 0.6 bar, but at most 0.8 bar.
The unit “bar” which is used in the specification and which is not in accordance with the metric system may be converted with the aid of the following conversion factor: 1bar=1x10°Pa
Amended Sheet — 2003-08-27
Claims (11)
1. Method for waste water purification, in which the waste water which is to be purified is biologically purified and the outflow from the fixed bed is subjected to dead-end membrane filtration, whereas the retained solids are removed by back-flushing, characterized in that the biological purification takes place in a trickling filter stage, whereas during the back-flushing flocculants are added to the outflow from the trickling filter stage, that chemical cleaning agents and/or disinfectants are added, that the back-flushing is assisted by the introduction of gas and that flushing liquid which is produced during the back-flushing is fed to a primary clarification stage connected upstream of the trickling filter stage.
2. Method according to Claim 1, characterized in that the gas is air.
3. Method according to Claim 1 or 2, characterized in that the back-flushing is carried out using filtrate from the dead-end-membrane filtration.
4. Method according to one of Claims 1 to 3, characterized in that flushing liquid which is produced during the back-flushing is drained off as excess sludge.
5. Apparatus for waste water purification, comprising a fixed-bed reactor for biological purification, whereas a dead-end membrane filtration unit is provided on the outlet side, downstream of the fixed-bed reactor, for purifying the outflow from the fixed-bed reactor, characterized in that the fixed-bed reactor is a trickling filter reactor, that the dead-end membrane filtration unit, in order to discharge the flushing liquid, is connected to a primary clarification tank of the trickling filter reactor, that a device for adding flocculant to the outflow is provided on the outlet side, downstream of the trickling filter reactor, that a device, which has a device for adding chemical cleaning agent and/or disinfectant, for the back-flushing of the retained solids is provided and that to assist the back-flushing a device for the introduction of gas into the dead-end membrane filtration unit is provided.
6. Apparatus according to Claim 5, characterized in that the gas is air.
7. Apparatus according to Claim 5 or 6, characterized in that the dead-end membrane filtration unit has microfiltration or ultrafiltration membranes.
8. Apparatus according to one of Claims 5 to 7, characterized in that a filtrate vessel is provided for collecting the filtrate from the dead-end membrane filtration unit, which filtrate vessel is connected to the device for back-flushing. Amended Sheet —- 2003-08-27
9. Apparatus according to one of Claims 5 to 8, characterized in that the dead-end membrane filtration unit has vertically arranged filter modules.
10. Method according to claim 1 substantially as herein described.
11. Apparatus according to claim 5 substantially as herein described with reference to the accompanying drawing. Amended Sheet - 2003-08-27
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0040500A AT408750B (en) | 2000-03-10 | 2000-03-10 | METHOD AND DEVICE FOR WASTE WATER TREATMENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200205320B true ZA200205320B (en) | 2003-09-02 |
Family
ID=3673652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200205320A ZA200205320B (en) | 2000-03-10 | 2002-07-03 | Method and device for effluent treatment. |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP1265819B1 (en) |
| CN (1) | CN1238278C (en) |
| AT (1) | AT408750B (en) |
| AU (1) | AU2001235492A1 (en) |
| BR (1) | BR0109103B1 (en) |
| DE (1) | DE50100578D1 (en) |
| DZ (1) | DZ3314A1 (en) |
| EG (1) | EG22803A (en) |
| ES (1) | ES2202278T3 (en) |
| MX (1) | MXPA02008685A (en) |
| SA (1) | SA01220120B1 (en) |
| TN (1) | TNSN01037A1 (en) |
| TR (1) | TR200202065T2 (en) |
| WO (1) | WO2001068536A1 (en) |
| ZA (1) | ZA200205320B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329314C (en) * | 2004-02-05 | 2007-08-01 | 哈尔滨工业大学 | Multipurpose bio-trickling filter deordorization device |
| WO2014027122A1 (en) * | 2012-08-16 | 2014-02-20 | Acciona Agua, S.A.U. | Water treatment system and method |
| AU2013317919B2 (en) * | 2012-09-21 | 2017-04-27 | D.C. Water & Sewer Authority | Method and apparatus for water treatment using screens |
| CN106904706A (en) * | 2017-03-06 | 2017-06-30 | 王刚 | A kind of waste water solid separation equipment and system |
| CN111871989B (en) * | 2020-06-16 | 2022-03-22 | 力合科技（湖南）股份有限公司 | Water sample pretreatment system |
| CN116947146B (en) * | 2023-07-12 | 2024-02-23 | 苏州登峰环境工程有限公司 | Integrated high-efficiency ozone aerodynamic sewage treatment device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470931A3 (en) * | 1990-08-08 | 1992-05-13 | Ciba-Geigy Ag | Soil and waste water treatment |
| US5221479A (en) * | 1991-02-15 | 1993-06-22 | Fuji Photo Film Co., Ltd. | Filtration system |
| JP3107950B2 (en) * | 1993-07-07 | 2000-11-13 | オルガノ株式会社 | Biological treatment apparatus and water treatment method using the same |
| NL9400647A (en) * | 1994-04-22 | 1995-12-01 | Stork Friesland Bv | Membrane filtration system, method for subjecting a liquid to membrane filtration and method for cleaning such a membrane filtration system. |
| KR0154384B1 (en) * | 1995-07-03 | 1998-10-15 | 박원훈 | Water treatment apparatus using membrane |
| DE19718028C1 (en) * | 1997-04-29 | 1998-06-04 | Hydac Filtertechnik Gmbh | Fluid filter assembly having membrane modules arranged in parallel |
| DE19731887A1 (en) * | 1997-07-24 | 1999-01-28 | Gerd Thon | Sterile filtration assembly for treating e.g. rain water |
| JPH1157710A (en) * | 1997-08-27 | 1999-03-02 | Kurita Water Ind Ltd | Device for treating waste water with membrane |
-
2000
- 2000-03-10 AT AT0040500A patent/AT408750B/en not_active IP Right Cessation
-
2001
- 2001-02-23 AU AU2001235492A patent/AU2001235492A1/en not_active Abandoned
- 2001-02-23 TR TR200202065T patent/TR200202065T2/en unknown
- 2001-02-23 DZ DZ013314A patent/DZ3314A1/en active
- 2001-02-23 DE DE50100578T patent/DE50100578D1/en not_active Expired - Lifetime
- 2001-02-23 BR BRPI0109103-4A patent/BR0109103B1/en not_active IP Right Cessation
- 2001-02-23 CN CNB018062903A patent/CN1238278C/en not_active Expired - Fee Related
- 2001-02-23 EP EP01907557A patent/EP1265819B1/en not_active Expired - Lifetime
- 2001-02-23 MX MXPA02008685A patent/MXPA02008685A/en active IP Right Grant
- 2001-02-23 WO PCT/EP2001/002078 patent/WO2001068536A1/en active IP Right Grant
- 2001-02-23 ES ES01907557T patent/ES2202278T3/en not_active Expired - Lifetime
- 2001-02-28 EG EG20010218A patent/EG22803A/en active
- 2001-03-09 TN TNSN01037 patent/TNSN01037A1/en unknown
- 2001-05-16 SA SA01220120A patent/SA01220120B1/en unknown
-
2002
- 2002-07-03 ZA ZA200205320A patent/ZA200205320B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TNSN01037A1 (en) | 2003-04-03 |
| MXPA02008685A (en) | 2004-09-06 |
| AT408750B (en) | 2002-02-25 |
| EP1265819A1 (en) | 2002-12-18 |
| DZ3314A1 (en) | 2001-09-20 |
| DE50100578D1 (en) | 2003-10-09 |
| EP1265819B1 (en) | 2003-09-03 |
| BR0109103A (en) | 2002-12-03 |
| WO2001068536A1 (en) | 2001-09-20 |
| CN1238278C (en) | 2006-01-25 |
| AU2001235492A1 (en) | 2001-09-24 |
| CN1416406A (en) | 2003-05-07 |
| ES2202278T3 (en) | 2004-04-01 |
| BR0109103B1 (en) | 2010-10-05 |
| SA01220120B1 (en) | 2006-11-14 |
| ATA4052000A (en) | 2001-07-15 |
| EG22803A (en) | 2003-08-31 |
| TR200202065T2 (en) | 2003-01-21 |
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