EP1470085A1 - Procede et dispositif de traitement biologique d effluents a queux, en vue de leur epuration - Google Patents
Procede et dispositif de traitement biologique d effluents a queux, en vue de leur epurationInfo
- Publication number
- EP1470085A1 EP1470085A1 EP20030734740 EP03734740A EP1470085A1 EP 1470085 A1 EP1470085 A1 EP 1470085A1 EP 20030734740 EP20030734740 EP 20030734740 EP 03734740 A EP03734740 A EP 03734740A EP 1470085 A1 EP1470085 A1 EP 1470085A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reactor
- aeration tank
- effluent
- sludge
- activated sludge
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000000746 purification Methods 0.000 title description 8
- 239000010802 sludge Substances 0.000 claims abstract description 50
- 238000005273 aeration Methods 0.000 claims abstract description 30
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000009629 microbiological culture Methods 0.000 claims abstract description 3
- 230000008569 process Effects 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 239000002028 Biomass Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 244000144992 flock Species 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000010908 decantation Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 238000005352 clarification Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000003834 intracellular effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000819038 Chichester Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000004783 oxidative metabolism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- 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
-
- 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
- C02F3/006—Regulation methods for biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/908—Organic
Definitions
- the present invention relates to the biological treatment of aqueous effluents, such as in particular domestic waste water and industrial waste water, with a view to their purification.
- the invention relates to an improved method and device for the biological treatment of such effluents using cultures free of microorganisms according to the activated sludge technique, in order to eliminate the carbon pollution contained in the effluents to be treated.
- the devices implementing these conventional purification processes generally require a chain of specialized apparatuses which successively screen, desander, degrease and primary decantation of the effluent to be treated, these apparatuses being positioned upstream. of the biological treatment stage proper by activated sludge.
- the present invention provides a process for the biological treatment of effluents loaded with impurities of urban or industrial origin, characterized in that it implements a single aeration tank with high mass load in which the raw, or mechanically pretreated, effluent is mixed, without prior settling, with a free microbial culture of the activated sludge type, evolving in poorly aerated medium, of the order of 0.1 to 0.2 kg O 2 / kg BOD5 eliminated, the organic load applied being equal or greater at least 2 kgDCO / kgMS.j, preferably equal to or greater than 4 kgDCO / kgMS.j, the hydraulic residence time of the raw effluent in the single aeration tank being between 30 and 90 minutes, preferably between 40 and 60 minutes.
- the assembly which, in an installation according to the prior art, consists of the primary settling tank and the aeration tank is replaced, according to the invention, by a single aeration tank with high load mass.
- the mass load is defined by the ratio between the flow of daily pollution expressed as COD or BOD5 and the quantity of dry matter present in the aeration tank.
- the value of this mass load should be established beyond 1.5 kg DBO5 / kgMS / d., And this with a concentration of solid matter between 0 , 5 and 2.5gMS / l, which leads to applied volume loads greater than 3 kgDBO5 / m 3 / d.
- the volume of the single aeration tank is reduced to a minimum by a factor of 10 compared to the activated sludge treatment tank of conventional installations with prolonged aeration and low load applied.
- the process which is the subject of the invention as defined above is based on biosorption: in a very heavy aeration tank, part of the dissolved carbon pollution, almost all of the colloidal and particulate fraction being biosorbed by the flock of activated sludge.
- the purifying action is based essentially on biosorption phenomena and not on oxidative or fermentative biological phenomena and that the process makes it possible to avoid primary decantation and the establishment of sand removal and degreasing helps maintain a high content of colloidal and particulate matter in the effluent to be treated, compounds promoting biosorption.
- Biosorption can be described as a physicochemical phenomenon where the elimination of pollution corresponds to a rapid transfer of material from the liquid phase to the flock, and this by adsorption, absorption and trapping.
- the microbial population does not have the time to hydrolyze and metabolize the adsorbed pollution.
- the method according to the invention as defined above is based on the trapping of pollution by the adsorbent "Activated Sludge” and this without biological degradation by oxidative or fermentation, the activated sludge implemented evolving by permanence with high applied mass load, while maintaining low ventilation to guarantee the system's mixing energy and sufficient energy for biosorption.
- the biosorption phenomenon taking place in the process which is the subject of the present invention is characterized by kinetics of reactions superior (factor 2 to 3) to the biological reactions observed in conventional activated sludge, and this with a low air intake (respectively 0, 1 to 0.2kg O / kg BOD5 eliminated versus 0.6kg O 2 / kg BOD5 eliminated).
- the orders of magnitude are as follows: - 15 minutes for the biosorption according to the process which is the subject of the invention.
- the purification yields obtained are low (around 50% for BOD5), while the process which is the subject of the present invention makes it possible to obtain average abatements of the order of 75% for BOD5 and 80 % for the
- the process which is the subject of the invention shows a very high reactivity to variations in the parameters of the raw water. Given the large pollution ratio on the biomass present and consequently the low concentration of the latter (1 to 2g / l MES), a significant variation in the characteristics of the raw water very quickly causes an imbalance in the system.
- the very heavy load process has only a low buffering capacity.
- a regulation system is provided, by modulating the rate of recirculation of the mixed liquor in the single aeration tank, this regulation being carried out so as to keep the solid matter (suspended matter + biomass) within a range defined, preferably between approximately 1.0 and 1.5 g / l, and is ensured by the continuous measurement of the turbidity of the activated sludge or of the mixed liquor, this measurement being coupled with a servo-control of the flow rate of recirculation or extraction of said mixed liquor.
- the invention it is also possible to provide for regulation of the supply of air to the single basin, this in order to maintain a low set point of dissolved oxygen, for example between 0.1 and 1 mg / 1.
- the excess dissolved oxygen can be used for the oxidation of organic material which is very easily assimilated, which must be avoided in the case of the process according to the invention in which it is sought to promote the phenomenon of biosorption.
- the invention also relates to an installation for implementing the method defined above.
- This installation is characterized in that it comprises:
- this reactor which constitutes said single aeration tank comprising means for supplying air continuously or intermittently with associated mixing,
- an intermediate clarifier performing the separation of the sludge from the depolluted effluent, and - a sludge recirculation circuit from the intermediate clarifier to the free culture reactor, the rate of recirculation (or extraction) being controlled to measure the turbidity in the reactor.
- FIG. 1 schematically represents an installation according to the present invention
- FIG. 2 is a curve illustrating the variation of the biosorption constant as a function of the charge applied in an example of implementation of the method of the invention.
- the device according to the invention comprises a reactor, or single aeration tank, with activated sludge under heavy load, designated by the reference 1, this reactor comprising means 2 for supplying air, continuously or intermittently, the stirring energy being supplied mechanically, with a control system for the dissolved oxygen content, and a probe 3 for measuring turbidity.
- an intermediate settling tank 4 is associated with the reactor 1 so as to separate the sludge from the depolluted effluent.
- the installation further comprises a circuit 5 for sludge recirculation from the intermediate settling tank 4 to the free culture reactor 1, the flow rate of the sludge recirculation (or the extraction of the latter from the intermediate settling tank 4) being controlled by the turbidity measurement provided by the probe 3.
- the device can include a second stage 6 which can be:
- a denitrification reactor with fixed biomass with fixed or mobile support (depending on the constraints of rejection of suspended solids), receiving the intermediate effluent coming from the nitrification reactor.
- the assimilable carbon required can be supplied externally (in the form of methanol for example), or come from an anaerobic digestion of the sludge extracted from the reactor, the latter being highly fermentable; • an anaerobic digestion reactor or any other sludge hydrolysis system to liquefy the fermentable fraction of this sludge and supply the carbon easily assimilated necessary for the denitrification process or a methanisation process; the remaining sludges rendered inert after hydrolysis being separated by any suitable process such as centrifugation, microfiltration; • an anaerobic digestion reactor to produce biogas and thus provide part of the energy necessary for the operation of the process.
- the reactor 1 operating with activated sludge at very high load is produced in the form of an aeration tank, known, in terms of chemical engineering, under the name of "integral mixture bioreactor" which ensures mixing. efficient with low energy consumption; since the characteristics of the water are the same in all points of the basin, the phenomenon of biosorption will be favored.
- This type of tank has the disadvantage of being sensitive to variations in flow rate and characteristics of the liquid to be treated, phenomena very frequently observed in the field of waste water treatment. Since, according to the invention, there is provision for a control of the oxygen content, said sensitivity to the flow rate and to the pollution flow will have no repercussion on the treatment of the effluent.
- the invention provides a control system, by modulating the recirculation rate of the mixed liquor
- circuit 5 to keep the solids (MES + biomass) within the defined range, preferably around 1.0 - 1.5g / l, as specified above.
- a continuous turbidity measurement is carried out, using the probe turbidimeter 3, or any other suitable sensor known to those skilled in the art, for example: particle counter, spectrophotometer, ..., this measure being coupled to a device for controlling the recirculation flow rate or extracting the mixed liquor.
- this measurement makes it possible to globally characterize the content of suspended solids in the medium, thus describing the operating conditions of the installation. The practical benefit of using this parameter for the regulation of purification processes using activated sludge has already been stressed.
- FR-A-2 784 093 describes an automated recirculation management process developed with the aim of controlling the residence time of sludge in secondary clarification in activated sludge processes and this process uses a signal representing the concentration of sludge obtained from a sensor positioned in the recirculation line. Furthermore, FR-A-2 795 713 uses the turbidity measurement to characterize the pollutant load contained in the raw water, this measurement being associated with colloidal and particulate pollution.
- the signal obtained must represent the concentration of solid matter, the phenomenon of biosorption not taking place only with microorganisms but also with the suspended matter present in the sludge.
- the sensor such as 3 must be positioned either directly in the biological reactor 1 as illustrated in FIG. 1, or at the outlet of said reactor, on the water line supplying the associated clarifier 4 The positioning will be done according to the rules of the art known to those skilled in the art according to the type of sensor chosen.
- the regulation implemented according to the invention may consist in defining four intervals of concentrations of suspended solids MS, in the single aeration tank 1. Each interval corresponds to a suitable operation, ie of the pump for recirculating the mixed liquors of the clarifier 4 to the aeration tank 1, or from the sludge extraction pump.
- the set points are as follows: target concentration 1.5 g / 1, concentration deviation ⁇ 0.3g / l, floor concentration lg / 1.
- concentration deviation ⁇ 0.3g / l
- This regulation based on the generation of two different setpoints for air flow according to the concentration of dissolved oxygen in the aeration tank 1 and the implementation of which is well known to those skilled in the art, will serve to constantly maintain a residual dissolved oxygen between 0.1 and 1 mg / 1.
- the regulation can also be obtained by stopping the ventilation by supplying the stirring energy mechanically.
- the recirculation or extraction rate of the mixed liquor to maintain a constant content of solid matter in the biological reactor 1
- the control of the means of supply in air 2 to maintain a low residual dissolved oxygen in the biological reactor.
- the association of a very high-load activated sludge process with an optimized control system allows not only to obtain a high level of treatment of carbon pollution in a compact reactor associated with a clarifier which is also compact, but above all to control the process and its performance over time, even during periods of hydraulic overload.
- the example of implementation indicated in the table below shows the resistance to leaching, in an installation according to the invention operating under heavy load, on the one hand without servo-control and, on the other hand with servo-control, and the FIG. 2 represents the curve of the variation of the constant Ao of biosorption as a function of the applied mass load Cma, expressed in total COD. Examination of this curve shows that the higher the applied load, the higher the biosorption constant.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0201045 | 2002-01-29 | ||
| FR0201045A FR2835250B1 (fr) | 2002-01-29 | 2002-01-29 | Procede et dispositif de traitement biologique d'effluents aqueux, en vue de leur epuration |
| PCT/FR2003/000267 WO2003064334A1 (fr) | 2002-01-29 | 2003-01-28 | Procede et dispositif de traitement biologique d'effluents aqueux, en vue de leur epuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1470085A1 true EP1470085A1 (fr) | 2004-10-27 |
Family
ID=27619718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030734740 Withdrawn EP1470085A1 (fr) | 2002-01-29 | 2003-01-28 | Procede et dispositif de traitement biologique d effluents a queux, en vue de leur epuration |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US7276165B2 (ru) |
| EP (1) | EP1470085A1 (ru) |
| KR (1) | KR20040078145A (ru) |
| CN (1) | CN1625530A (ru) |
| BR (1) | BR0307244A (ru) |
| CA (1) | CA2474157A1 (ru) |
| DE (1) | DE03734740T1 (ru) |
| ES (1) | ES2228299T1 (ru) |
| FR (1) | FR2835250B1 (ru) |
| MX (1) | MXPA04007335A (ru) |
| NO (1) | NO20043598L (ru) |
| PL (1) | PL370107A1 (ru) |
| RU (1) | RU2004126229A (ru) |
| TR (1) | TR200403271T3 (ru) |
| WO (1) | WO2003064334A1 (ru) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110036771A1 (en) | 2007-01-09 | 2011-02-17 | Steven Woodard | Ballasted anaerobic system and method for treating wastewater |
| US20100213123A1 (en) | 2007-01-09 | 2010-08-26 | Marston Peter G | Ballasted sequencing batch reactor system and method for treating wastewater |
| AU2008205247B2 (en) | 2007-01-09 | 2010-07-01 | Evoqua Water Technologies Llc | A system and method for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water |
| US8470172B2 (en) | 2007-01-09 | 2013-06-25 | Siemens Industry, Inc. | System for enhancing a wastewater treatment process |
| US7632402B2 (en) * | 2007-05-13 | 2009-12-15 | King Technology, Inc. | Control system |
| US8038881B2 (en) * | 2007-06-12 | 2011-10-18 | Biological Petroleum Cleaning Ltd. | Wastewater treatment |
| US8535532B2 (en) * | 2008-07-15 | 2013-09-17 | Christopher Ott | Systems and methods for wastewater treatment |
| US8092678B2 (en) * | 2008-07-15 | 2012-01-10 | Protech Services, Inc. | Systems and methods for wastewater treatment |
| US8382983B2 (en) | 2009-10-09 | 2013-02-26 | Christopher Ott | Systems and methods for converting gaseous byproducts of wastewater treatment into energy |
| CN104395246A (zh) | 2012-06-11 | 2015-03-04 | 伊沃夸水处理技术有限责任公司 | 使用固定膜工艺和压载沉降的处理 |
| CA2881703C (en) | 2012-09-26 | 2020-12-22 | Evoqua Water Technologies Llc | System for measuring the concentration of magnetic ballast in a slurry |
| FR3052567B1 (fr) * | 2016-06-14 | 2020-01-24 | Suez Groupe | Procede , produit programme d'ordinateur et systeme de pilotage dynamique d'un reseau fluidique |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2631825A1 (de) * | 1976-07-15 | 1978-01-19 | Bbc Brown Boveri & Cie | Verfahren zur bestimmung der schmutzfracht von einer klaeranlage zugefuehrten abwaessern |
| JPS54136755A (en) * | 1978-04-15 | 1979-10-24 | Osaka Gas Co Ltd | Active sludge disposal process for waste water |
| DE3115104A1 (de) * | 1981-04-14 | 1982-10-28 | Linde Ag, 6200 Wiesbaden | Verfahren und vorrichtung zur biologischen reinigung von abwasser |
| US4663044A (en) * | 1985-09-13 | 1987-05-05 | Transfield, Incorporated | Biological treatment of wastewater |
| US4891136A (en) * | 1986-11-26 | 1990-01-02 | Amoco Corporation | Method for controlling filamentous organisms in wastewater treatment processes |
| US4859341A (en) * | 1986-12-08 | 1989-08-22 | Schreiber Corporation, Inc. | Method for controlling aerating units in a wastewater treatment process |
| US5013441A (en) * | 1988-07-20 | 1991-05-07 | Goronszy Mervyn C | Biological nutrient removal with sludge bulking control in a batch activated sludge system |
| JP3099839B2 (ja) * | 1990-11-07 | 2000-10-16 | 味の素株式会社 | 活性汚泥法による廃水処理方法 |
| US5624562A (en) * | 1995-03-20 | 1997-04-29 | Ev Environmental, Inc. | Apparatus and treatment for wastewater |
| AU3800197A (en) * | 1996-07-10 | 1998-02-02 | Aqua-Aerobic Systems, Inc. | Multi-phase dual cycle influent process |
| FR2753191B1 (fr) * | 1996-09-10 | 1998-11-06 | Degremont | Procede d'epuration de la pollution carbonee et de denitrification en milieu oxygene des eaux usees |
| DE10009251A1 (de) * | 2000-02-29 | 2001-09-06 | Hydro Ingenieure Planungsgesel | Vorrichtung zur biologischen Reinigung von Abwässern |
-
2002
- 2002-01-29 FR FR0201045A patent/FR2835250B1/fr not_active Expired - Fee Related
-
2003
- 2003-01-28 PL PL37010703A patent/PL370107A1/xx not_active Application Discontinuation
- 2003-01-28 WO PCT/FR2003/000267 patent/WO2003064334A1/fr not_active Application Discontinuation
- 2003-01-28 CA CA002474157A patent/CA2474157A1/fr not_active Abandoned
- 2003-01-28 TR TR200403271T patent/TR200403271T3/xx unknown
- 2003-01-28 EP EP20030734740 patent/EP1470085A1/fr not_active Withdrawn
- 2003-01-28 KR KR10-2004-7011674A patent/KR20040078145A/ko not_active Application Discontinuation
- 2003-01-28 ES ES03734740T patent/ES2228299T1/es active Pending
- 2003-01-28 US US10/500,844 patent/US7276165B2/en not_active Expired - Fee Related
- 2003-01-28 BR BR0307244A patent/BR0307244A/pt not_active IP Right Cessation
- 2003-01-28 RU RU2004126229/15A patent/RU2004126229A/ru not_active Application Discontinuation
- 2003-01-28 MX MXPA04007335A patent/MXPA04007335A/es unknown
- 2003-01-28 CN CNA038028638A patent/CN1625530A/zh active Pending
- 2003-01-28 DE DE2003734740 patent/DE03734740T1/de active Pending
-
2004
- 2004-08-27 NO NO20043598A patent/NO20043598L/no not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03064334A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2474157A1 (fr) | 2003-08-07 |
| FR2835250A1 (fr) | 2003-08-01 |
| DE03734740T1 (de) | 2005-05-04 |
| CN1625530A (zh) | 2005-06-08 |
| NO20043598L (no) | 2004-08-27 |
| KR20040078145A (ko) | 2004-09-08 |
| US7276165B2 (en) | 2007-10-02 |
| ES2228299T1 (es) | 2005-04-16 |
| PL370107A1 (en) | 2005-05-16 |
| TR200403271T3 (tr) | 2005-03-21 |
| BR0307244A (pt) | 2004-12-14 |
| FR2835250B1 (fr) | 2004-11-05 |
| MXPA04007335A (es) | 2004-11-26 |
| US20060138047A1 (en) | 2006-06-29 |
| RU2004126229A (ru) | 2005-05-27 |
| WO2003064334A1 (fr) | 2003-08-07 |
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