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    • 专利摘要:
    abstract a method and a system for selecting and retaining solids with superior settling characteristics, the method comprising feeding wastewater to an input of a processor that carries out a treatment process to the wastewater, outputting processed wastewater to an output of the processor, feeding the processed wastewater to an input of a gravimetric selector that selects solids with superior settling characteristics, and outputting a recycle stream to a first output of the gravimetric selector back to the processor. Abstract Method and apparatus for the treatment of waste water using gravimetric selection. The present invention relates to a method and system for selecting and maintaining solids with superior sedimentation characteristics. The method comprises feeding wastewater to an inlet of a processor that performs a wastewater treatment process, eliminating wastewater processed at the processor outlet, the wastewater fed to an input of a gravity selector that selects solids with superior settling characteristics, and the elimination of a recycle stream to a first output of the gravimetric selector back to the processor.
    公开号:BR112015012248A2
    申请号:R112015012248
    申请日:2013-11-27
    公开日:2020-04-22
    发明作者:Wett Bernhard；Bott Charles；Nyhuis Geert；O'shaughnessy Maureen；Murthy Sudhir
    申请人:Wett Bernhard；Bott Charles；D C Water & Sewer Authority；Nyhuis Geert；Hampton Roads Sanitation Distr；Maureen Oshaughnessy；Murthy Sudhir；
    IPC主号:
    专利说明:

    Descriptive Report of the Invention Patent for METHOD AND APPARATUS FOR THE TREATMENT OF RESIDUAL WATER WITH THE USE OF GRAVIMETRIC SELECTION.
    Cross Reference to Previous Applications [0001] This application claims priority and benefit from provisional US patent application No. 61 / 730,196, filed on November 27, 2012, entitled Method and Apparatus for Wastewater Treatment Using Gravimetric Selection, the entirety of which is incorporated by reference.
    Field of the Invention [0002] The present description relates, in general, to a method and apparatus for the treatment of waste water and, more specifically, to a method and apparatus for the treatment of waste water with gravimetric selection .
    Background of the Invention [0003] Gravity separation is used, in general, to remove the solids associated with the activated sediment process. The methodology has been developed to improve the sedimentation of solids by gravimetric selection. This methodology can also be applied to reduce membrane fouling in a membrane bioreactor (MBR) process or to decrease fouling of the membrane diffuser. There are currently three approaches to selecting the solids that sediment. The first is positioned within an activated sediment process to select the sedimented solids in wells, such as by using aerobic and anoxic or anaerobic zones or selectors to improve sedimentation. However, there is a mixed history with the use of these selectors and it does not always work.
    [0004] The second method includes the use of shear / agitation in a reactor to select the granular solids that settle
    2/21 well. This selection is also accompanied by an increase in the rate of excess sediment in the conventional gravity separator of solid and liquid. This selection process is often gradual and tedious, and since the selector is associated with the conventional process, this can result in problems associated with licensing requirements. In most cases, only a batch reactor process allows the flexibility to increase over time and modify the surplus rate.
    [0005] The third method includes selecting and wasting poor sedimentation foam and retained solids, often through the collection and surface residue of foam and solids on the surface of a reactor with the use of classification selectors. Although this approach was originally intended to reduce foam, it also selectively washes off solids that do not settle well, as these slowly settling solids tend to accumulate near the surface in reactors. Thus, this method retains only solids that sediment well, thus providing a method that may be useful in not selecting solids poor in sedimentation, but which may have limited use in the selection of sedimentation solids. In the application of the present method, improvements in sedimentation characteristics are often inconsistent, since sometimes low sedimentation solids, if produced at rates higher than, for example, a rate of removal of the classifier surface, are retained and remain in the sediment.
    [0006] There is an unmet need for a method and an apparatus for the treatment of waste water that do not have the disadvantages of the methods currently used to select and separate solids from waste water.
    Summary of the Invention
    3/21 [0007] According to one aspect of the disclosure, a method is provided for the selection and retention of solids with superior sedimentation characteristics. The method comprises: feeding residual water to a processor input that performs a biological treatment process on the waste water; the emission of processed wastewater to a processor outlet; feeding processed waste water to an input of a gravimetric selector that selects solids with superior sedimentation characteristics; and the emission of a recycling stream at a first exit from the gravimetric selector.
    [0008] The method can also comprise the emission of a waste stream at a second outlet of the gravimetric selector for handling solids, where the handling of solids includes, at least, a thickener, stabilizer, conditioning and water removal. The waste stream can be rejected and the recycle stream can be returned to the processor. The waste stream may comprise solids with poor sedimentation and filtration characteristics or which have a greater potential for membrane clogging.
    [0009] The method can also comprise the supply of the recycling flow from the first output of the gravimetric selector to the processor. The recycling stream can comprise solids with superior sedimentation characteristics.
    [0010] The treatment process may comprise: a suspended growth activated sediment process; a granular sediment process; an integrated fixed film activated sediment process; a process for removing biological nutrients; an aerobic digestion process; or an anaerobic digestion process.
    [0011] The treatment process can comprise a biological treatment process. The biological treatment process may comprise an in-line solid and liquid separation process.
    4/21 [0012] The processor may comprise a membrane separator.
    [0013] The processor can comprise a cyclone that accelerates wastewater and provides the shear force to wastewater to separate solids with good sedimentation characteristics from solids with low sedimentation and filtration characteristics.
    [0014] The processor may comprise a centrifuge that provides the centrifugal and shear force to the separated solids with good sedimentation characteristics of the solids with low sedimentation and filtration characteristics in the waste water.
    [0015] The cyclone feed rate and geometry are configured to adjust the speed of the residual water in the cyclone to: select larger or denser solids; or increase the time available for separation in the cyclone.
    [0016] The process of feeding the waste water processed at the entrance of the gravimetric selector can comprise: feeding the processed water at the entrance of the gravimetric selector comprises: feeding the processed waste water to an inlet of a separator that separates the waste water in a subflow and effluent; receiving the subflow of the separator; and select gravimetrically the solids with superior sedimentation characteristics from the subflow and provide the recycling flow at the first outlet.
    [0017] The method can also comprise controlling a speed of the residual water in the cyclone, so that solids of a predetermined size or density are retained.
    [0018] The method may further comprise controlling a hydraulic loading rate to select sedimented solids of a predetermined size or density.
    [0019] In accordance with another aspect of the present disclosure, an apparatus is provided that selects and retains solids with charac
    5/21 superior sedimentation characteristics. The apparatus comprises: a processor comprising an input and an output, the processor being configured to carry out a treatment process; and a gravimetric selector comprising an inlet, a residual flow outlet and a recycle flow outlet, wherein the gravimetric selector recycle flow outlet is coupled to the processor inlet.
    [0020] The input of the gravimetric selector can be coupled to the output of the processor.
    [0021] The input of the gravimetric selector can be coupled to a subflow output of a separator.
    [0022] The recycling flow output from the gravimetric selector provides a recycling flow to the processor, the recycling flow that comprises solids with superior sedimentation characteristics.
    [0023] The treatment process may comprise: a suspended growth activated sediment process; a granular process; an integrated fixed film activated sediment process; a process for removing biological nutrients; an aerobic digestion process; or an anaerobic digestion process.
    [0024] The processor can comprise a bioreactor process. The bioreactor process can comprise an in-line solid and liquid separation process.
    [0025] The processor can comprise a cyclone that accelerates wastewater and provides the shear force to wastewater to separate solids with good sedimentation characteristics from solids with low sedimentation and filtration characteristics.
    [0026] The processor may comprise a centrifuge that provides centrifugal and shear force to separate solids with good sedimentation characteristics from solids with low sedimentation and filtration characteristics in waste water.
    [0027] The feed rate and geometry of the cyclone can be configured to adjust the speed of the residual water in the cyclone to: select larger or denser solids; or increase the time available for separation in the cyclone.
    [0028] The device can also comprise a separator that has an input coupled to the processor output.
    [0029] The cyclone can control a speed of the waste water to adjust an excess rate, so that sedimentation solids of a predetermined size or density are retained.
    [0030] The cyclone can control a hydraulic charge rate to select sedimentation solids of a predetermined size or density.
    [0031] According to yet another example of the description, a method is provided for the selection and retention of solids with superior sedimentation characteristics, in which the method comprises: receiving residual water from a residual water source; processing waste water to provide processed waste water; select gravimetrically the solids with sedimentation characteristics of the processed waste water; and supplying the selected solids to a processor to further process the selected solids together with the additional waste water received from the waste water supply.
    Brief Description of the Drawings [0032] The attached drawings, which are included to provide a better understanding of the description, are incorporated here and form a part of that specification, illustrate the modalities of this description and together with the detailed description, serve to explain the principles of this description. No attempt is made to show the structural details of the present description
    7/21 in more detail than may be necessary for a fundamental understanding of disclosure and the various ways in which it can be practiced. In the drawings:
    [0033] figure 1 shows an example of an activated sediment process, where sediment waste occurs through a waste stream taken from the sub-stream of a clarifier;
    [0034] figure 2 shows an example of an activated sediment process according to the principles of this description, where the waste stream is taken directly from the reactor tank and applied to a gravimetric selector, with the densest particles and large returns to the reactor and the lighter fraction, which represents the residual solids, is removed from the system;
    [0035] figure 3 shows a process of activated sediment according to the principles of the present description, where the waste stream is removed from the subflow of a clarifier and applied to a gravimetric selector, with the large and denser particles returned to the reactor and the lighter fraction, which represents the residual solids extracted from the system;
    [0036] figure 4 shows a graph that compares the typical deterioration of sediment sedimentation properties, with improved sedimentation performance of the activated sediment processes of figures 2 or 3;
    [0037] Figure 5 shows a graph that compares the deterioration of sedimentation properties in a process track in a typical system with an improved sedimentation performance of a parallel track according to the principles of the present description;
    [0038] figure 6 shows a sediment volume index (SVI) versus the time graph for an activated sediment process according to the principles of this description.
    8/21
    Detailed Description of the Invention [0039] The invention and the various features and advantageous details of it are explained in more detail with reference to the modalities and non-limiting examples that are described and / or illustrated in the attached drawings and detailed in the description below. It should be noted that the characteristics represented in the drawings are not necessarily drawn to scale, and the characteristics of one modality can be used with other modalities, as the person skilled in the art would recognize, even if it is not explicitly mentioned in that document. Descriptions of well-known components and processing techniques can be omitted so as not to unnecessarily obscure the modalities of the present description. The examples used here are intended merely to facilitate an understanding of the ways in which disclosure can be practiced and which will allow those skilled in the art to continue practicing the modalities of this description. Therefore, the examples and modalities here should not be construed as limiting the scope of the description. In addition, it should be noted that similar reference numbers represent similar parts across the various views of the drawings.
    [0040] The terms it includes, which it comprises and its variations, as used in this specification, mean that it includes, but is not limited to, unless expressly specified to the contrary.
    [0041] The terms one, one, and o, as used in this specification, mean one or more, unless expressly specified to the contrary.
    [0042] Although the steps of the process, the steps of the method, or similar articles, can be described in a sequential order,
    9/21 such processes and methods can be configured to work in alternate orders. In other words, any sequence or order of steps that can be described does not necessarily indicate a requirement that the steps must be performed in that order. The steps of the processes or methods described here can be carried out in any practical order. In addition, some steps can be performed simultaneously.
    [0043] When a single device or article is described herein, it will readily be apparent that more than one device or article can be used in place of a single device or article. Likewise, where more than one device or article is described herein, it will readily be apparent that a single device or article can be used in place of more than one device or article. The functionality or characteristics of a device may be alternatively incorporated with one or more other devices that are not explicitly described as having such functionality or functionality.
    [0044] Figure 1 shows an example of an activated sediment process and a system 100 for carrying out the activated sediment process. System 100 may include pretreatment, which may include a bar screen 2, a grain remover (not shown), a pretreatment chamber 3, and an effluent pump (not shown). System 100 may further include a primary separator 5, a processor 6, and a secondary separator 9. System 100 may receive waste water from an external source (not shown), such as, for example, a sewer system , and process the wastewater 1 in a pre-treatment phase which may include, for example, a screen of bars 2 to remove larger objects, such as cans, rags, sticks, plastic packages, and the like, from the residual water 1. The pre-treatment step can also include a chamber
    10/21 pretreatment 3 which may contain, for example, a sand or grain chamber, to adjust the speed of the incoming waste water 1 and thus allow sedimentation of, for example, sand, grain, stones, broken glass, and the like. The pretreatment chamber 3 can be replaced, for example, with a sand or grain channel. The pre-treatment step can also include a small tank for removing, for example, grease, oil, and the like.
    [0045] Following the pretreatment phase, the remaining solid and liquid mixture 4A, which includes the excess residual water containing the accumulated solids, can be sent to a primary separator 5 for gravity sedimentation. Primary separator 5 can include a tank (for example, a clarifier tank, a sediment tank, etc.), which can take one of a variety of shapes, such as, for example, rectangular, cone-shaped, circular , elliptical, and so on. Primary separator 5 may have a chemical or ballast material added to improve the removal of solids. Primary separator 5 sediments the heavier solids from the mixture of solid and liquid 4A. The resulting subflow 8A can be emitted from the primary separator 5 and sent to the handling of solids for further treatment, such as, for example, thickening, stabilization, conditioning, dehydration, sediment treatment, and so on, as is known to those skilled in the art.
    [0046] The resulting mixture of solid and liquid 4B containing the soluble organic and inorganic contaminants and particulate materials can then be sent to processor 6. Processor 6 may include a bioreactor. Processor 6 may include an aeration tank (not shown) and live aerobic and optional bacteria. Air can be added to the 4B mixture to feed a bioreaction process (where aerobic bacteria are grown) in
    11/21 processor 6. Aerobic bacteria will digest organic material in the presence of dissolved oxygen.
    [0047] Processor 6 may also include a membrane module (not shown) for the separation of relatively pure water from the suspension of organic matter and bacteria. If the membrane module is included in processor 6, then separator 9 can be omitted from systems 200 (shown in figure 2) and 300 (shown in figure 3). Aerobic bacteria and the membrane module can be configured to run in succession on the membrane bioreactor (MBR). For example, the mixture of solid and liquid can flow through the first bioreactor, where it can be maintained for as long as necessary for the reaction to be completed and then through the membrane module.
    [0048] Air can be added to processor 6 using any known method that can supply air to the mixture of solid and liquid 4B. A common method is by adding compressed air to the fine bubble diffusers (not shown) produced from perforated flexible membrane materials that include EPDM and polyurethane. Processor 6 produces a mixture of solid and oxygenated liquid, commonly known as mixed solution 4C, which is then sent to secondary separator 9.
    [0049] The secondary separator 9 separates the mixture of solid and liquid 4C to produce a subflow 4F, which can then be recycled as part of a separate sediment 7 and sent back to bioreactor 6, and clarified as a wastewater effluent 10 A portion of the 8B subflow biomass (or mixed solution) can be wasted from the process and sent to the handling of solids for further treatment such as, for example, thickening, stabilization, conditioning, dehydration, sediment treatment, and so on, as is known in the art.
    12/21 [0050] Alternatively, processor 6 may include a membrane (not shown) that can be suspended in the slurry in processor 6 (instead of secondary separator 9), which can be appropriately divided to achieve flow of adequate air, with the surplus removed from the processor base 6 at a speed to obtain the required sediment retention time (SRT).
    [0051] It is noted that, instead of, or in addition to processor 6, system 200 may include, for example, a granular sediment process, an integrated fixed film activated sediment process, a nutrient removal process biological with various anaerobic, anoxic and aerobic zones with associated internal recycling, an aerobic digestion process, an anaerobic digestion process, and the like, as is known in the art.
    [0052] Figure 2 shows an example of a system 200 to carry out the activated sediment process that is built according to the principles of this specification. System 200 may include a similar set of system 100. System 200 may include a cyclone (not shown), a hydrocyclone (not shown), a centrifuge (not shown), a sedimentation tank (not shown), a column of sedimentation (not shown), a filter (not shown), and the like. In addition to the components of system 100, system 200 includes a gravimetric separator 11.0 system 200 has the ability to select solids of good sedimentation by means of gravimetric selection in gravimetric selector 11 through, for example, direct mass loss from the mixed liquid (or mixture of solid and 4D oxygenated liquid). Good sedimentation solids can include solids having a sediment volume index (IVL) of, for example, less than 120 ml / g and, preferably, less than or equal to 100 ml / g.
    [0053] The gravimetric selector 11 can include, for example, a co
    13/21 rectifier, a sedimentation tank, a cyclone, a hydrocyclone, a centrifuge, and the like. The gravimetric separator 11 can include an inlet and a plurality of outlets, which includes a waste stream outlet and a recycle stream outlet. The gravimetric separator 11 can be positioned to receive the mixture of solid and oxygenated liquid or mixed solution 4D at its inlet from an outlet of processor 6. Alternatively (or additionally), the 4C flow can be inserted in the gravimetric selector 11. During operation, the gravimetric selector 11 can classify, separate and / or choose the particles in the 4D mixture, which may include a solid or liquid liquid or suspension, based, for example, on the ratio of the centripetal force to the resistance of the fluid of the particles. The gravimetric selector 11 can separate good sedimentation solids from the 4D mixture and emit the solids, at its recycling flow outlet, as a 4E subflow, which can be fed back to processor 6 for further processing (eg, bioreaction, digestion, etc.). The gravimetric selector 11 can emit the suspension of liquid and remaining liquid in its waste stream outlet as an 8C waste stream, which may contain smaller particles and colloids that have the potential to cause MBR membrane clogging, cause turbidity in effluents 10 , and induce the encrustation of the membrane air diffuser, which can be emitted from the system for further treatment such as, for example, sediment treatment, dehydration, and so on.
    [0054] Figure 3 shows yet another example of a system 300 for carrying out the activated sediment process that is built according to the principles of this specification. System 300 can include a similar set of system 100. In addition to the components in system 100, system 300 can include gravimetric selector 11 which can be positioned to receive a subflow
    14/21
    4F at its inlet from a secondary outlet 9. The separator system 300 has the ability to select solids with good sedimentation by means of gravimetric selection in the gravimetric selector 11 through, for example, the direct loss of the more concentrated return sediment 7 .
    [0055] The gravimetric selector 11 can process subflow 4F, by separating the heavier solids from the mixture of solid and liquid and producing the heavier solids like subflow 4E at the outlet of the recycling stream and the surplus 8C that results in Exit of the waste stream from the gravimetric selector 11.0 surplus 8C can be directed to the handling of solids for further treatment, such as, for example, stabilization, dehydration, and so on. Subflow 4E can be recycled together with the separate pellets 7 and returned to processor 6 for further processing.
    [0056] According to an alternative aspect of the disclosure, the waste of part (or all) of the sediment can occur directly from the subflow of the secondary separator 9, which is not shown in the figures.
    [0057] The gravimetric selector 11 can include any one or more gravity separation devices for the selection and separation of solids from a mixture of solid and liquid, which includes, for example, a sedimentation tank, a sedimentation column , a cyclone, a hydrocyclone, a centrifuge, and / or the like. In the gravimetric selector 11, the discharge rate, which is also called the growth rate, can be used as a parameter in the selection of good sedimentation solids from the solution (or sediment). This surplus rate can be adjusted to increase waste of poor sedimentation solids, while only retaining good sedimentation solids. An increase in the exception rate
    15/21 tooth can promote the selection of good sedimentation solids until a certain point is reached, when the retention time is insufficient for the proper classification of solids. The target rate of excess of the gravity selection device should be based on the desired SRT of the process, as well as on the associated need to remove a particular mass of biomass from the system. The specific rate of surplus must be adjusted for the particular device used, but, in general, it is expected to be 10 to 100 times the excess rate of the secondary separation process 7.
    [0058] The hydrocyclone separation occurs under pressure, and a pressure drop can be used as an energy source for the separation. Thus, if the gravimetric selector 11 includes a hydrocyclone, the hydrocyclone must be configured so that the inlet is positioned to feed the mixture of solid and liquid that tangentially enters the hydrocyclone to develop a high radial velocity. In addition, the hydrocyclone may have a tapered shape. Thus, a rotation movement can be initiated and the acceleration of the fluid can result from the conical shape of the hydrocyclone. This creates a shear force that improves the resolution of particle characteristics by actions such as the destruction of filaments or the displacement of interstitial or linked water. A change in the initial velocity and / or diameter (size) of the cyclone may result in the selection of different rates of separation of desired solids fractions or, conversely, may result in excess of undesirable.
    [0059] For example, a pair of hydrocyclones can be installed in the residual sediment line of the 200 (or 300) system and configured for a waste rate of, for example, about 20 m 3 / h each. The pressure can be set to, for example, about 1.7 bar. An inline pressure sensor (not shown) can be included in the 200 (or 300) system, which can provide a control signal
    16/21 for the frequency drive, for example, of a pump (not shown), which can also be included in the 200 (or 300) system. The subflow nozzle (s) in the 200 (or 300) system can (m) have a diameter of, for example, about 25 mm, thus reducing any risk of vulnerability to time. Figure 4 shows SVI (ml_ / g) versus the time graphs for this example.
    [0060] According to another example, a plurality of cyclones (for example, a battery of seven cyclones) can be installed in the 200 (or 300) system. Each of the cyclones can be configured for a flow rate of 5 m 3 / h. The pressure can be set to, for example, about 2.1 bar and the diameter of the subflow nozzle (s) can be set to, for example, about 22 millimeters. The 200 (or 300) system can include one or more in-line screens, for example, about 5 mm wide to protect the cyclone (s) from clogging. Figure 6 shows SVI (ml / g) as a function of the time graph for this example.
    [0061] Separation by centrifugation occurs, in general, with the use of a solid tank centrifuge, where an increase in the rotation speed of the centrifuge (for example, in the range of 500 to 5000 rpm) increases the force of gravity and thus , the sedimentation speed. Thus, if the gravimetric selector 11 includes a centrifuge that has tank, roller and tank sections, the centrifuge can expose the mixture of solid and liquid in the gravimetric selector 11 many times that the gravitational force that can occur, for example, in a sedimentation tank. A very small differential rpm (for example, usually in the range of 1 to 10 rpm) between the tank and the centrifuge roller in the centrifuge can be used to separate the best settling solids from the poorest settling solids that are discharged into the excess tank from the centrifuge. Thus, when controlling the hydraulic load rate, the ro
    17/21 centrifuge, the differential rpm of the tank / roller and by managing these rates within predetermined limits, the selection of larger and / or denser solids can be controlled. For example, an increase in the hydraulic load rate or the differential rpm of the tank / roller can improve the choice of larger and / or denser solids, while a decrease in these rates can help to increase the retention time available for gravimetric separation, and an equilibrium rate can be used to manage the process. The solids in the tank section are wasted and the heavier solids can be retained and returned to processor 6.
    [0062] An important feature of the gravimetric selector 11 is its ability to use an aggressive surplus rate to retain solid sedimentation in separate equipment associated with a solid waste stream. These solid sedimentation solids tend to be denser and larger, with the best sedimentation being based on the Stokian sedimentation, which allows for quick removal of the material in the gravimetric selector 11. Another important feature is the selective removal of smaller and colloid particles the mixture of liquid and solid and liquid, which have the potential to cause MBR membrane clogging and / or turbidity in effluent 10, and induce the encrustation of the membrane air diffuser, for example, in the processor 6.
    [0063] The publication of U.S. Patent Application No. US 2013/0001160 discloses a method for biological purification of waste water containing ammonium, which is incorporated herein in its entirety. The described method provides gravimetric separation (for example, with the use of a hydrocyclone, a centrifuge, or sedimentation) of heavy-phase sediment containing slow-growing anaerobic oxidizing ammonia bacteria (ANAMMOX) from light-phase sediments and return the heavy sediment phase to the
    18/21 ammonia treatment aeration reactor that contains residual water, while feeding the light phase sediments to a digester for the production of gas.
    [0064] Figures 4 to 6 illustrate the improvement of the sediment properties that result from the application of the principles of this description, which includes the application of system 200 (illustrated in figure 2) or 300 (shown in figure 3). The sediment volume index (SVI) represents the volume of a sediment cover for 30 minutes in a standard test cylinder for one gram of solids and is a standard measure of sedimentation. Often, an SVI greater than 150 ml / g is an indicator of low sedimentation of sediments and an SVI less than 120 ml / g and, preferably, less than or equal to 100 ml / g is an indicator of good sedimentation. Sediment sedimentation determines the operation of solids from the maximum mixed solution that can be operated in an activated sediment unit. Even in well-operated treatment plants, sedimentation performance tends to deteriorate during certain periods of the year, for example, typically at the end of the winter season.
    [0065] As can be seen in Figures 4 to 6, the use of the gravimetric selector 11 provides and maintains good sedimentation, such as, for example, less than 120 ml / g, preferably less than or equal to about 100 ml / g.
    [0066] Figure 4 shows a graph that compares the deterioration of sediment sedimentation properties in the 100 system process with the improved performance of the activated sediment sedimentation processes in the 200 and 300 systems. This graph demonstrates the benefits of applying the selector gravimetric 11 according to the principles of disclosure. In particular, the graph illustrates a comparison of sedimentation properties with the use of the 200 (or 300) system, compared to sediment properties
    19/21 using the 100 system (shown in figure 1), which does not include the gravimetric selector 11. In particular, this graph shows the results in which a pair of cyclones is installed in the system's residual sediment line, and in which cyclones are developed for a mass loss rate of 20 m 3 / h each at a pressure of 1.7 bar with a 25 mm diameter underflow nozzle, as noted earlier.
    [0067] In Figure 4, the chart compares the deterioration of sediment sedimentation properties in the system during the winter and spring season (for example, December 1 to May 30) for a period of three years. As can be seen in the graph, although the SVI reached levels of up to about 190 ml / g at the end of winter, with the improved sedimentation performance during the same period, the SVI remained below 100 ml / g with the use of the 200 (or 300) system.
    [0068] Figures 5 and 6 show the graphs comparing the deterioration of sedimentation properties in a process track in a typical system, with an improved sedimentation performance of a parallel track in the 200 (or 300) system. In particular, the graphs show the results of a large-scale pilot test at the WWTP Glarnerland station, where a cyclone 7 battery was installed, each developed for a flow rate of 5 m 3 / h. The design pressure was adjusted to 2.1 bar and the diameter of the subflow nozzle was adjusted to 12 mm. A 5 mm thick in-line sieve was installed to protect the cyclone from clogging. The results show a comparison of the deterioration of sediment sedimentation properties (SVI by more than 900 ml / g) to a liquid process track with better sedimentation performance of the parallel track during an experimental period (SVI remains constant at about 100 ml / g). In WWTP
    20/21
    Glarnerland, the performance comparison appears more directly where a treatment train was operated without the gravimetric selector and the other parallel was operated with a gravimetric selector, as seen in the 200 (or 300) system, during the same period.
    [0069] In figure 6, the graph also shows the results of a test at the WWTP Strass station, where a pair of cyclones was installed in the waste sediment line developed for a loss of 20 m 3 / h each. The design pressure was set to 1.7 bar and an inline pressure sensor was included to provide the control signal for the pump frequency unit used in the system. Due to the size of the subflow nozzle, which had a diameter of 25 mm, vulnerability to clogging was not observed.
    [0070] As is evident from figures 4 to 6, the application of the gravimetric selector 11 in the 200 (or 300) system can mitigate the deterioration of the sedimentation performance that could occur, which would otherwise lead to operational problems and the a bottleneck in the design.
    [0071] An activated sediment process can include a bioreactor that can be used to treat wastewater. The activated sediment process can also include alternative processes for the treatment of waste water, for example, a granulate process, an integrated fixed film activated sediment process, an aerobic digestion process, an anaerobic digestion process, and so on. onwards. Any of these processes can be connected to a separation device using gravimetric separation for recycling or removing biomass.
    [0072] Although the description has been described in terms of exemplary modalities, those skilled in the art will recognize that disclosure can be practiced with modifications within the spirit and scope of the attached claims. These examples are merely
    21/21 illustrative and are not intended to be an exhaustive list of all the designs, modalities, modifications or possible applications of the disclosure.
    权利要求:
    Claims (30)
    [1]
    1. Method for selecting and retaining solids with superior sedimentation characteristics, the method characterized by the fact that it comprises:
    feeding waste water to a processor input that performs a treatment process on the waste water;
    eliminate the waste water processed in a processor outlet;
    feeding the processed waste water to an input of a gravimetric selector that selects solids with superior sedimentation characteristics; and eliminating a recycling stream at a first exit from the gravimetric selector, where a waste stream is rejected and the recycling stream is supplied to the processor.
    [2]
    2. Method for selecting and retaining solids with superior sedimentation characteristics, the method characterized by the fact that it comprises:
    feeding waste water to a processor input that performs a treatment process on the waste water;
    eliminate the waste water processed in a processor outlet;
    feeding the processed waste water to an input of a gravimetric selector that selects solids with superior sedimentation characteristics;
    eliminate a recycling stream at a first exit from the gravimetric selector, and eliminate a waste stream at a second exit from the gravimetric selector for handling solids, where the handling of solids includes at least one of thicken, stabilize, condition
    5/14
    2/7 and remove water.
    [3]
    3. Method, according to claim 1, characterized by the fact that the recycling flow is provided from the first gravimetric selector outlet to the processor.
    [4]
    4. Method according to claim 1, characterized by the fact that the recycling stream comprises solids with superior sedimentation characteristics.
    [5]
    5. Method, according to claim 2, characterized by the fact that the waste stream is rejected and the recycling stream is returned to the processor.
    [6]
    6. Method, according to claim 4, characterized by the fact that the waste stream comprises solids with poor sedimentation and filtration characteristics or that have increased the possibilities of membrane clogging.
    [7]
    7. Method, according to claim 1, characterized by the fact that the treatment process comprises:
    a suspended growth activated sediment process;
    a granular process;
    an integrated fixed film activated sediment process;
    a biological nutrient removal process;
    an aerobic digestion process; or an anaerobic digestion process.
    [8]
    8. Method according to claim 1, characterized by the fact that the treatment process comprises a biological treatment process.
    [9]
    9. Method according to claim 8, characterized by the fact that the biological treatment process comprises a process of separating solid and liquid in line.
    6/14
    3/7
    [10]
    10. Method according to claim 1, characterized by the fact that the processor includes a membrane separator.
    [11]
    11. Method for selecting and retaining solids with superior sedimentation characteristics, characterized by the fact that it comprises:
    feeding waste water to a processor input that performs a treatment process on the waste water;
    eliminate the waste water processed in a processor outlet;
    feeding the processed waste water to an input of a gravimetric selector that selects solids with superior sedimentation characteristics; and eliminate a recycling stream at a first exit from the gravimetric selector;
    wherein the gravimetric selector includes a cyclone that accelerates wastewater and provides the shear force to wastewater to separate solids with good sedimentation characteristics from solids with poor sedimentation and filtration characteristics.
    [12]
    12. Method for selecting and retaining solids with superior sedimentation characteristics, characterized by the fact that it comprises:
    feeding waste water to a processor input that performs a treatment process on the waste water;
    eliminate processed waste water at a processor outlet;
    feeding the processed waste water to an input of a gravimetric selector that selects solids with superior sedimentation characteristics; and eliminate a recycling stream at a first exit from the gravimetric selector,
    7/14
    4/7 where the gravimetric selector comprises a centrifuge that provides the centrifugal and shear force to separate solids with good sedimentation characteristics from solids with poor sedimentation and filtration characteristics in the waste water.
    [13]
    13. Method according to claim 11, characterized by the fact that a feed rate and a cyclone geometry are configured to adjust the speed of the waste water in the cyclone to:
    select larger or denser solids; or increase the time available for separation in the cyclone.
    [14]
    14. Method, according to claim 1, characterized by the fact that the feed of the processed waste water at the entrance of the gravimetric selector comprises:
    feeding the processed waste water to an inlet of a separator that separates the waste water into a subflow and effluent;
    receiving the subflow from the separator; and select gravimetrically solids with superior sedimentation characteristics from the subflow and provide the recycling flow at the first outlet.
    [15]
    15. Method, according to claim 11, characterized by the fact that it also comprises:
    control a speed of the residual water in the cyclone, so that solids of a predetermined size or density are retained.
    [16]
    16. Method, according to claim 11, characterized by the fact that it further comprises:
    control a hydraulic loading rate to select sedimentation solids of a predetermined size or density.
    [17]
    17. Device that selects and retains solids with characteristics
    8/14
    5/7 superior sedimentation techniques, characterized by the fact that it comprises:
    a processor comprising an input and an output, the processor being configured to carry out a treatment process; and a gravimetric selector comprising an inlet, a residual flow outlet and a recycle flow outlet, the gravimetric selector being configured to select solids with superior sedimentation characteristics, where the gravimetric selector recycle flow outlet is coupled to the inlet of the processor, and where the output of the gravimetric selector is coupled for handling solids, where handling solids includes at least one of thicken, stabilize, condition and remove water.
    [18]
    18. Apparatus, according to claim 17, characterized by the fact that the input of the gravimetric selector is coupled to the output of the processor.
    [19]
    19. Apparatus according to claim 17, characterized by the fact that the input of the gravimetric selector is coupled to a subflow output of a separator.
    [20]
    20. Apparatus according to claim 17, characterized by the fact that the recycling flow outlet of the gravimetric selector provides a recycling flow to the processor, the recycling flow comprising solids with superior sedimentation characteristics.
    [21]
    21. Apparatus according to claim 17, characterized by the fact that the treatment process comprises:
    a suspended growth activated sediment process;
    a granular process;
    9/14
    6/7 an integrated fixed film activated sediment process;
    a biological nutrient removal process;
    an aerobic digestion process; or an anaerobic digestion process.
    [22]
    22. Apparatus according to claim 17, characterized by the fact that the processor comprises:
    a bioreactor.
    [23]
    23. Apparatus according to claim 21, characterized by the fact that the bioreactor process comprises a solid to liquid in-line separation process.
    [24]
    24. Apparatus according to claim 17, characterized by the fact that the processor includes a cyclone that accelerates wastewater and provides the shear force to wastewater to separate solids with good sedimentation characteristics from solids with poor sedimentation characteristics and filtration.
    [25]
    25. Apparatus according to claim 17, characterized by the fact that the processor comprises a centrifuge that provides centrifugal and shear force to separate solids with good sedimentation characteristics from solids with poor sedimentation and filtration characteristics in waste water.
    [26]
    26. Apparatus according to claim 24, characterized by the fact that a feed rate and cyclone geometry are configured to adjust a speed of the waste water in the cyclone to:
    select larger or denser solids; or increase the time available for separation in the cyclone.
    [27]
    27. Apparatus, according to claim 17, characterized by the fact that it further comprises:
    10/14
    7/7 a separator that has an input coupled to the processor output.
    [28]
    28. Apparatus according to claim 24, characterized in that the cyclone controls a velocity of the waste water to adjust an excess rate so that sedimentation solids of a predetermined size or density are retained.
    [29]
    29. Apparatus according to claim 24, characterized by the fact that the cyclone controls a hydraulic charge rate to select sedimentation solids of a predetermined size or density.
    [30]
    30. Method for the selection and retention of solids with superior sedimentation characteristics, characterized by the fact that it comprises:
    receiving waste water from a waste water source;
    processing waste water to provide processed waste water;
    gravimetrically select solids with superior sedimentation characteristics from the processed waste water and eliminate a recycling and a residual flow;
    supplying the recycling stream to a processor to further process the recycling stream along with more wastewater received from the wastewater supply; and provide the residual flow for handling solids, where the handling of solids includes at least one of thicken, stabilize, condition and remove water.
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    同族专利:
    公开号 | 公开日
    AU2013352135A1|2015-07-16|
    CA2892761A1|2014-06-05|
    EP2925676A1|2015-10-07|
    JP2016504185A|2016-02-12|
    SG11201504159PA|2015-07-30|
    EP3483123A1|2019-05-15|
    US10112856B2|2018-10-30|
    AU2013352135B2|2016-09-29|
    HUE044241T2|2019-10-28|
    CN110436712A|2019-11-12|
    US9242882B2|2016-01-26|
    ZA201504671B|2016-10-26|
    RU2644889C2|2018-02-14|
    MX347655B|2017-05-08|
    CN105980313A|2016-09-28|
    US20140144836A1|2014-05-29|
    PL2925676T3|2019-10-31|
    IL239044A|2019-05-30|
    EP2925676B1|2018-12-26|
    CA2892761C|2019-09-24|
    RU2015125485A|2017-01-13|
    US20160137537A1|2016-05-19|
    DK2925676T3|2019-04-15|
    MX2015006714A|2016-06-02|
    RS58953B1|2019-08-30|
    EP2925676A4|2016-10-05|
    WO2014085662A1|2014-06-05|
    IL239044D0|2015-07-30|
    JP6449168B2|2019-01-09|
    ES2719278T3|2019-07-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE636212A|1962-08-15|
    US3468794A|1968-02-23|1969-09-23|Bird Machine Co|Anaerobic digestion process|
    US4056465A|1976-04-12|1977-11-01|Air Products And Chemicals, Inc.|Production of non-bulking activated sludge|
    JPS58104696A|1981-12-18|1983-06-22|Ebara Infilco Co Ltd|Treatment of waste water|
    US4415452A|1982-03-18|1983-11-15|Heil Richard W|Method and apparatus for treating organic wastewater|
    US4891136A|1986-11-26|1990-01-02|Amoco Corporation|Method for controlling filamentous organisms in wastewater treatment processes|
    KR910003004B1|1989-01-28|1991-05-15|풍림산업 주식회사|Biological nitrogen and phosphorus removing method and apparatus|
    DE4138667A1|1991-11-25|1993-05-27|Sued Chemie Ag|METHOD FOR DISCHARGING DRAIN CLEANER|
    JPH06304589A|1993-04-22|1994-11-01|Ngk Insulators Ltd|Treatment of return water|
    FR2707621B1|1993-07-12|1995-10-20|Omnium Traitement Valorisa|Process and installation for purifying water with denitrifying physico-chemical sludge.|
    US5645799A|1995-03-06|1997-07-08|Nalco Chemical Company|Apparatus for a continuous polymer dosage optimization and waste water analysis system|
    JPH08257583A|1995-03-23|1996-10-08|Kurita Water Ind Ltd|Waste water treatment apparatus|
    US6309547B1|1996-04-15|2001-10-30|Western Environmental Engineering Company|Anaerobic treatment process with removal of nonbiodegradable organic material|
    NL1003866C2|1996-08-23|1998-02-26|Grontmij Advies & Techniek Bv|Biological treatment of waste water.|
    NL1005343C1|1996-08-23|1998-02-26|Univ Delft Tech|Method for treating waste water containing ammonia.|
    US6183642B1|1997-08-21|2001-02-06|Grontmij Advies & Techniek B.V.|Biological treatment of wastewater|
    NL1005345C2|1997-02-21|1998-08-24|Univ Delft Tech|Method for obtaining granular growth of a microorganism in a reactor.|
    AT407151B|1997-04-14|2001-01-25|Ingerle Kurt Dipl Ing Dr Techn|METHOD FOR THE CLEANING OF AMMONIUM-CONTAINING WASTE WATER|
    FR2785899B1|1998-11-18|2001-01-19|Omnium Traitement Valorisa|METHOD OF TREATING WATER BY BULK FLOCKS INCLUDING A RECYCLING OF GRANULAR MATERIAL USING A CORRESPONDING HYDROCYCLONE|
    JP2001096297A|1999-09-30|2001-04-10|Ebara Corp|Sewage treatment process and equipment for treating effluent sewerage|
    DE19948549C1|1999-10-08|2001-06-21|Cyklar Ag|Swimming mud vent|
    US20010033527A1|2000-01-28|2001-10-25|Smith Robert L.|Self cleaning inline mixer|
    US6592757B2|2000-02-01|2003-07-15|O'brien & Gere Engineers, Inc.|Selector contact stabilization process and apparatus for wastewater treatment|
    US6555002B2|2000-10-06|2003-04-29|Premier Wastwater International, Llc|Apparatus and method for wastewater treatment with enhanced solids reduction |
    JP3866053B2|2001-05-31|2007-01-10|オルガノ株式会社|Coagulation sedimentation apparatus and operation method thereof|
    JP3773169B2|2001-06-29|2006-05-10|株式会社荏原製作所|High speed biological treatment method and apparatus for organic wastewater|
    KR100419431B1|2002-02-28|2004-02-18|삼성엔지니어링 주식회사|Wastewater treatment apparatus and method for removing nitrogen and phosphorus|
    US20030232107A1|2002-06-13|2003-12-18|Terry Seth Sprague|Biosolids-based food additive and food material for animal food and methods of production and use thereof|
    NL1021466C2|2002-09-16|2004-03-18|Univ Delft Tech|Method for treating waste water.|
    CA2471048C|2002-09-19|2006-04-25|Suncor Energy Inc.|Bituminous froth hydrocarbon cyclone|
    US7060185B2|2003-04-21|2006-06-13|Korea Institute Of Construction Technology|Sewage treatment apparatus using self-granulated activated sludge and sewage treatment method thereof|
    DE102004043814A1|2004-09-08|2006-03-23|Holm, Niels Christian, Dr.|Method for the selective selection of a desired, low sludge index in the activated sludge process by means of external sludge selection|
    DE102004043815A1|2004-09-08|2006-03-23|Holm, Niels Christian, Dr.|A method for the direct selective selection of a desired low sludge index in continuous activated sludge processes|
    CN2767430Y|2005-02-21|2006-03-29|于东江|High rate precipitation device in water treatment|
    US7344643B2|2005-06-30|2008-03-18|Siemens Water Technologies Holding Corp.|Process to enhance phosphorus removal for activated sludge wastewater treatment systems|
    PL1901994T3|2005-07-08|2010-06-30|Dsm Ip Assets Bv|Process for the continuous production of hydroxylammonium|
    WO2007011890A2|2005-07-18|2007-01-25|Siemens Water Technologies Corp.|Conditioning system for activated sludge wastewater treatment processes|
    CN101300196A|2005-09-02|2008-11-05|西门子水处理技术公司|Screening of inert solids from a low-yield wastewater treatment process|
    AT432243T|2005-09-16|2009-06-15|Univ Delft Tech|PROCESS FOR REMOVING OXO ANIONS AND METAL CATIONS FROM A LIQUID|
    AT502391B1|2005-09-20|2007-03-15|Univ Innsbruck Inst Fuer Umwel|METHOD FOR THE TREATMENT OF AMMONIUM-CONTAINING WASTE WATER|
    FR2891540B1|2005-09-30|2007-12-28|Otv Sa|METHOD FOR TREATING WATER COMPRISING A RAPID DECANTATION STEP FOLLOWED BY A FILTRATION STEP DIRECTLY ON MEMBRANES OF MICRO OR ULTRA-FILTRATION, AND CORRESPONDING DEVICE|
    FR2902417A1|2005-10-28|2007-12-21|Otv Sa|Biological and flocculation-decantation treatment of water, comprises transferring biologically treated flow to mixing- and decantation area, and extracting granulated material from decantation sludges|
    US7407582B2|2006-01-13|2008-08-05|Otv Sa S.A.|Combination activated sludge—ballasted flocculation process|
    US7481934B2|2006-01-20|2009-01-27|Renewable Fibers, Llc|Methods for treatment of wastewater with powdered natural lignocellulosic material|
    US20090282882A1|2006-02-24|2009-11-19|Beesterzwaag Behkeer B.V.|Process for the conversion of liquid waste biomass into a fertilizer product|
    US20070217856A1|2006-03-20|2007-09-20|Kott John M|Portable paint system|
    US7431834B2|2006-04-17|2008-10-07|Ebara Corporation|Waste water and sludge treatment apparatus|
    AT503653B1|2006-09-21|2007-12-15|Arc Austrian Res Centers Gmbh|Biogas production plant with two fermentation chambers, includes gas line from first chamber into riser tube in second chamber, to induce circulation and mixing of fermentation medium|
    AU2007342680B2|2007-01-09|2010-07-22|Evoqua Water Technologies Llc|Improved collection system for a wet drum magnetic separator|
    EP2107947B1|2007-01-09|2016-03-16|Evoqua Water Technologies LLC|A system and method for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water|
    US20110036771A1|2007-01-09|2011-02-17|Steven Woodard|Ballasted anaerobic system and method for treating wastewater|
    JP2008284427A|2007-05-15|2008-11-27|Sumitomo Heavy Industries Environment Co Ltd|Apparatus and method for treating waste water|
    FR2921649B1|2007-10-02|2014-08-08|Degremont|SEQUENTIAL SEQUENTIAL BIOLOGICAL REACTOR FOR THE TREATMENT OF URBAN OR INDUSTRIAL RESIDUAL WATER|
    US7604740B2|2008-02-01|2009-10-20|Clean Water Services|Waste activated sludge stripping to remove internal phosphorus|
    AT537124T|2008-09-12|2011-12-15|Cyklar Stulz Gmbh|METHOD FOR THE TREATMENT OF AMMONIUM-CONTAINING WASTE WATER|
    US8157988B2|2008-10-23|2012-04-17|Veolia Water Solutions & Technologies Support|Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor|
    CN102209689A|2008-11-11|2011-10-05|株式会社神钢环境舒立净|Water treatment device and water treatment method|
    WO2010055776A1|2008-11-11|2010-05-20|株式会社神鋼環境ソリューション|Water treatment device and water treatment method|
    US8445253B2|2009-07-01|2013-05-21|The United States Of America, As Represented By The Secretary Of Agriculture|High performance nitrifying sludge for high ammonium concentration and low temperature wastewater treatment|
    WO2011103286A2|2010-02-17|2011-08-25|University Of South Florida|Solids retention time uncoupling by selective wasting of sludge|
    ES2483150T3|2010-03-10|2014-08-05|Demon Gmbh|Procedure for the biological purification of a wastewater containing ammonium|
    JP5804543B2|2010-04-05|2015-11-04|株式会社根本杏林堂|Mixing device, mixing tube, chemical solution injection system, and method for mixing chemical solutions|
    WO2012019310A1|2010-08-13|2012-02-16|Anaergia Inc.|Treatment of municipal wastewater with anaerobic digestion|
    US20120048802A1|2010-09-01|2012-03-01|Brown Jess C|Non-aerated biodestruction of biochemical oxygen demand|
    CN102153198B|2010-12-02|2012-10-10|西安建筑科技大学|Granular sludge sewage treatment device capable of controlling diameter and density of granules|
    US8268169B2|2010-12-20|2012-09-18|Palo Alto Research Center Incorporated|Membrane bioreactor and moving bed bioreactor configurations for wastewater treatment|
    CN202036825U|2011-01-20|2011-11-16|北京城市排水集团有限责任公司|High-sedimentation performance sludge separating device for activated sludge process|
    CA2847958A1|2011-09-19|2013-03-28|Daniel Guy Pomerleau|Three-phase separation system for drilling fluids and drill cuttings|
    NL2008598C2|2012-04-03|2013-10-07|Dhv B V|Hybrid wastewater treatment.|
    CA2892761C|2012-11-27|2019-09-24|Hampton Roads Sanitation District|Method and apparatus for wastewater treatment using gravimetric selection|CA2892761C|2012-11-27|2019-09-24|Hampton Roads Sanitation District|Method and apparatus for wastewater treatment using gravimetric selection|
    WO2015061340A1|2013-10-22|2015-04-30|Renewable Fibers LLC dba RF WasteWater, LLC|Reduction of substances in contaminated fluids using a naturally occurring biological growth media|
    CA2982076A1|2014-05-21|2015-11-26|Renewable Fibers, Llc Dba Rf Wastewater|Biofilm media, treatment system and method of treatment|
    SG11201609624XA|2014-06-30|2017-04-27|Hampton Roads Sanitation Distr|Method and apparatus for wastewater treatment using external selection|
    US9902635B2|2014-07-23|2018-02-27|Hampton Roads Sanitation District|Method for deammonification process control using pH, specific conductivity, or ammonia|
    US20160264442A1|2014-11-25|2016-09-15|Renewable Energy Alternatives, Llc|Nutrient concentration and water recovery system and associated methods|
    AU2016277038A1|2015-06-09|2017-12-07|EssDe GmbH|Method for biological cleaning of wastewater|
    NL2015286B1|2015-08-10|2017-02-28|Haskoningdhv Nederland Bv|Continuous process for the treatment of wastewater.|
    US10640401B2|2016-05-18|2020-05-05|New Jersey Institute Of Technology|Reactive electrochemical membrane filtration|
    FR3057566B1|2016-10-17|2020-01-31|Suez International|EFFLUENT TREATMENT DEVICE AND EFFLUENT TREATMENT METHOD|
    CN110167889A|2016-12-06|2019-08-23|格兰富控股联合股份公司|Biomass selection and the consumption of selectivity organism matter enhance the multi-parameter of Membrane Bioreactor for Wastewater Treatment efficiency|
    SG10201610914YA|2016-12-28|2018-07-30|Meidensha Electric Mfg Co Ltd|Membrane separation method and apparatus equipped with particle fractionator|
    JP6264503B1|2016-12-28|2018-01-24|株式会社明電舎|Membrane separation method and apparatus provided with particle sorting apparatus|
    NL2021313B1|2018-07-16|2020-01-24|Haskoningdhv Nederland Bv|Rapid granulation for the start-up of a wastewater treatment system and associated control system|
    US11161760B2|2018-08-13|2021-11-02|Ovivo Inc.|Biomass selection and control for continuous flow granular/flocculent activated sludge processes|
    AU2019321269A1|2018-08-13|2021-04-08|Ovivo Inc.|Biomass selection and control for continuous flow granular/flocculent activated sludge processes|
    FR3092105A1|2019-01-28|2020-07-31|Suez Groupe|Process and installation for recovering phosphorus in a sludge effluent from wastewater|
    CN112064755A|2020-08-13|2020-12-11|重庆大学|Accurate reposition of redundant personnel of inlet for stom water initial stage rainwater and processing system|
    法律状态:
    2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |
    2020-05-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-04-27| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-08-31| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-10-19| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2022-02-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US201261730196P| true| 2012-11-27|2012-11-27|
    PCT/US2013/072345|WO2014085662A1|2012-11-27|2013-11-27|Method and apparatus for wastewater treatment using gravimetric selection|
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