WO2008086010A1 - System and method for enhancing an activated sludge process - Google Patents
System and method for enhancing an activated sludge process Download PDFInfo
- Publication number
- WO2008086010A1 WO2008086010A1 PCT/US2008/000323 US2008000323W WO2008086010A1 WO 2008086010 A1 WO2008086010 A1 WO 2008086010A1 US 2008000323 W US2008000323 W US 2008000323W WO 2008086010 A1 WO2008086010 A1 WO 2008086010A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mixed liquor
- biological floes
- weighting agent
- floes
- subsystem
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/12—Inert solids used as ballast for improving sedimentation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- This invention relates to a system and method for enhancing an activated sludge process.
- Municipal and industrial wastewater treatment facilities often include primary, secondary and tertiary processes to treat wastewater to remove contaminants, such as suspended solids, biodegradable organics, phosphorus, nitrogen, microbiological contaminants, and the like, to provide a clean effluent.
- the clean effluent is typically subject to strict local, state and federal regulations.
- the primary treatment processes often includes screens, grit chambers and/or primary- clarifiers to remove large solids and other suspended matter to provide a primary effluent.
- Activated sludge is one type of secondary process which utilizes an aeration tank(s) which contains a large population of microorganisms that ingest contaminants in the primary effluent to form biological "floes.” Oxygen is typically fed into the aeration tank(s) to promote growth of these biological floes.
- the combination of primary effluent, or in some cases raw sewage, and biological floes is commonly known as mixed liquor.
- the population or concentration of microorganisms in the mixed liquor is often referred to as mixed liquor suspended solids (MLSS).
- the biological floes in the mixed liquor are then typically sent to a secondary clarifier where the biological floes are separated by gravity from the mixed liquor to provide a secondary effluent and a settled sludge.
- the secondary effluent, or "clean" effluent may be discharged back to the environment or processed by additional tertiary treatment processes.
- the majority of the settled sludge in the secondary clarifier is typically recycled back to the aeration tank(s) by a return activated sludge subsystem. The remaining, excess sludge is wasted from the system to control the concentration of mixed liquor suspended solids.
- the secondary clarifier of a typical activated sludge process is the bottleneck in most wastewater treatment processes that utilize activated sludge as a secondary process.
- the crucial solids separation step of the biological floes from the mixed liquor in the secondary clarifier is therefore typically the rate limiting process which is governed by a variety of factors, most notably the specific gravity, or density, of the biological floes.
- solids separation in the secondary clarifier in a typical activated sludge processes is often unreliable due to the many types of settling problems that are caused by inter alia: overgrowth of filamentous organisms, viscous bulking caused by the overgrowth of either zoogleal organisms or exocellular polysaccharide material, pin floe, straggler floe, excessive solids loading on the secondary clarif ⁇ ers, excessive secondary clarifier surface overflow rate, and the like.
- This invention features a system for enhancing an activated sludge process that includes at least one aeration tank for receiving a flow of wastewater and for introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids.
- a weighting agent impregnation subsystem includes an impregnation tank for mixing the mixed liquor, virgin weighting agent, and recycled weighting agent to impregnate the weighting agent into biological floes suspended in the mixed liquor to form weighted biological floes.
- a flocculant injection port located downstream from the aeration tank introduces a flocculant to the mixed liquor for enhancing settling and thickening of the weighted biological floes and provides agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with weighted biological floes.
- At least one clarifier separates and collects the weighted biological floes from the mixed liquor to provide a secondary effluent and a settled sludge.
- a return activated sludge subsystem recycles the majority of the settled sludge to the aeration tank.
- a weighting agent recovery subsystem removes and shears the remaining settled sludge and recovers the weighting agent therefrom and reintroduces the weighting agent to the weighting agent impregnation subsystem.
- a wasting subsystem wastes the remaining settled sludge of the weighting agent recovery subsystem to control the population of the microorganisms in the mixed liquor.
- the mixing tank energy of the mixing may be in the range of about 1.5 HP/1000ft 3 to about 100 HP/1000 ft 3 .
- the weighting agent impregnation subsystem may include a storage subsystem for storing the virgin weighting agent and dispensing the virgin weighting agent to the mixing tank.
- the capacity of the activated sludge system may be increased by increasing the concentration of the mixed liquor suspended solids in the aeration tank by reducing the amount of settled sludge wasted by the wasting subsystem.
- the amount of the settled sludge wasted by the wasting subsystem may be reduced to increase the concentration of mixed liquor suspended solids for enhancing nitrification of ammonia in the mixed liquor.
- the nitrification may be enhanced by increasing the amount of dissolved oxygen introduced into the aeration tank.
- the aeration tank may include at least one anoxic zone configured to remove nitrogen from the mixed liquor.
- the aeration tank may include at least one anaerobic zone configured to remove of phosphorus from the mixed liquor.
- a coagulant may be added to the aeration tank, the impregnation tank, or the flocculant injection port to remove phosphorus by precipitation and/or coagulation.
- the weighting agent may include magnetite.
- the flocculant may include a cationic and/or anionic polymer.
- the ratio of the weighting agent to mixed liquor may be greater than about 1 :5 to 1.
- the weighting agent recovery subsystem may include an in-line shear mixer for separating the biological floes from the weighting agent.
- the weighting agent recovery subsystem may include a single pass wet drum magnetic separator for recovering the weighting agent from the remaining settled sludge and for introducing the recovered weighting agent into the impregnation tank.
- the secondary effluent may have a total suspended solids concentration less than about 30 mg/L.
- the weighting agent impregnation subsystem may dispense the mixed liquor from the aeration tank to the impregnation tank and dispenses the weighted biological floes back to the aeration tank.
- the weighting agent impregnation subsystem may be located downstream from the aeration tank and before the secondary clarifier.
- This invention also features a system for enhancing an activated sludge process including at least one aeration tank for receiving a flow a wastewater and for introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids.
- An impregnation subsystem includes an impregnation tank for mixing the mixed liquor, virgin magnetically separable inorganic material, and recycled magnetically separable inorganic material to impregnate the magnetically separable inorganic material into biological floes suspended in the mixed liquor to form weighted biological floes.
- a flocculant injection port located downstream from the aeration tank introduces a flocculant to the mixed liquor for enhancing settling and thickening of the weighted biological floes and for providing agglomeration of non- impregnated biological floes and/or partially impregnated biological floes with weighted biological floes.
- At least one clarifier separates and collects the weighted biological floes from the mixed liquor to provide a secondary effluent and a settled sludge.
- a return activated sludge subsystem recycles the majority of the settled sludge to the aeration tank.
- a recovery subsystem removes and shears the remaining settled sludge and recovers the magnetically separable inorganic material therefrom and reintroduces the magnetically separable inorganic material to the magnetically separable inorganic material impregnation subsystem.
- a wasting subsystem wastes the remaining sludge of the magnetically separable inorganic material recovery subsystem to control the population of the microorganisms in the mixed liquor.
- the magnetically separable inorganic material includes magnetite.
- This invention further features a system for enhancing an activated sludge process that includes at least one aeration tank for receiving a flow a wastewater and for introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids.
- a weighting agent impregnation subsystem located downstream from the aeration tank includes an impregnation tank for mixing the mixed liquor, virgin weighting agent, and recycled weighting agent to impregnate the weighting agent into biological floes suspended in the mixed liquor to form weighted biological floes.
- a flocculant injection port located downstream from the aeration tank introduces a flocculant to the mixed liquor for enhancing settling and thickening of the weighted biological floes and for providing agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with weighted biological floes.
- At least one clarifier separates and collects the weighted biological floes from the mixed liquor to provide a secondary effluent and a settled sludge.
- a weighting agent recovery subsystem removes and shears the remaining settled sludge and recovers the weighting agent therefrom and reintroduces the weighting agent to the weighting agent impregnation subsystem.
- a wasting subsystem wastes the remaining sludge of the weight agent recovery subsystem to control the population of the microorganisms in the mixed liquor.
- This invention also features a system for enhancing an activated sludge process that includes at least one aeration tank for receiving a flow a wastewater and for introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids.
- a weighting agent impregnation subsystem includes an impregnation tank for mixing the mixed liquor, virgin weighting agent, and recycled weighting agent to impregnate the weighting agent into biological floes suspended in the mixed liquor to form weighted biological floes.
- a flocculant injection port located downstream from the aeration tank introduces a flocculant to the mixed liquor for enhancing settling and thickening of the weighted biological floes and provides agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with weighted biological floes.
- This invention further features a method for enhancing an activated sludge process, the method including the steps of: a) receiving a flow of wastewater and introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids, b) impregnating a weighting agent into the biological floes suspended in the mixed liquor to form weighted biological floes, c) introducing a flocculant to the mixed liquor to enhance settling and thickening of the weighted biological floes and to establish agglomeration of non- impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes, d) separating and collecting the weighted biological floes from the mixed liquor in at least one secondary clarifier to provide a secondary effluent and a settled sludge, e) recycling the majority of the settled sludge to step a), f) removing and shearing the
- the weighting agent may be impregnated into the biological floes in step b) by mixing the mixed liquor and the biological floes at a predetermined energy level.
- the mixing energy may be in the range of about 1.5 HP/ 1000 ft 3 to about 100 HP/ 1000 ft 3 .
- the capacity of the activated sludge process may be increased by increasing the concentration of the mixed liquor suspended solids in step a) by reducing the amount of the settled sludge removed in steps f) and g).
- the nitrification of ammonia in the mixed liquid may be enhanced by increasing the concentration of mixed liquor suspended solids by reducing the amount of the settled sludge removed in steps f) and g).
- the nitrification may be enhanced by increasing the amount of oxygen introduced to the mixed liquor in step a).
- the removal of nitrogen from the mixed liquor may be enhanced by utilizing at least one anoxic zone.
- the removal of the phosphorus from the settled sludge may be enhanced by utilizing at least one anaerobic zone.
- the method may further include the step of adding a coagulant for removing phosphorus by precipitation and/or by coagulation.
- the weighting agent may include magnetite.
- the flocculant may include a cationic and/or an anionic polymer.
- the ratio of the weighting agent to mixed liquor maybe greater than about 1 :5 to 1.
- the method may further include the step of separating the weighting agent from the sheared settled sludge of step f) by utilizing a single pass wet drum magnetic separator.
- the secondary effluent may have a total suspended solids concentration less than about 30 mg/L.
- This invention also features a method for enhancing an activated sludge process, the method including the steps of a) receiving a flow of wastewater and introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids, b) impregnating a magnetically separable inorganic material into the biological floes suspended in the mixed liquor to form weighted biological floes, c) introducing a flocculant to the mixed liquor to enhance settling and thickening of the weighted biological floes and to establish agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes, d) separating and collecting the weighted biological floes from the mixed liquor in at least one secondary clarifier to provide a secondary effluent and a settled sludge, e) recycling the majority of the settled sludge to step a), f) removing
- the magnetically separable inorganic material may include magnetite.
- This invention further features a method for enhancing an activated sludge process, the method including the steps of a) receiving a flow of wastewater and introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids, b) impregnating a weighting agent into the biological floes suspended in the mixed liquor to form weighted biological floes, c) introducing a flocculant to the mixed liquor to enhance settling and thickening of the weighted biological floes and to establish agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes, d) separating and collecting the weighted biological floes from the mixed liquor in at least one secondary clarifier to provide a secondary effluent and a settled sludge, e) removing and shearing the remaining settled sludge and recovering the weighting agent therefrom to reintro
- This invention also features a method for enhancing an activated sludge process, the method including the steps of a) receiving a flow of wastewater and introducing dissolved oxygen to a population of microorganisms to promote growth of biological floes in a mixed liquor defined by a concentration of mixed liquor suspended solids, b) impregnating a weighting agent into the biological floes suspended in the mixed liquor to form weighted biological floes, and c) introducing a flocculant to the mixed liquor to enhance settling and thickening of the weighted biological floes and to establish agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes.
- Fig. 1 is a three-dimensional view of one embodiment of the system for enhancing an activated sludge process of this invention
- Fig. 2 is a three-dimensional view showing an example of a weighting agent impregnated in biological floes in accordance with this invention
- Fig. 3 A is a schematic side view of one embodiment of an in-line shear mixer used with the weighting agent recovery system shown in Fig. 1;
- Fig. 3B is a schematic top view of the in line shear mixer shown in Fig. 3A;
- Fig. 4 is a schematic block diagram of one embodiment of the aeration tank shown in Fig. 1 including an anoxic zone configured to remove nitrogen and an anaerobic zone configured to remove phosphorus;
- Fig. 5 is a schematic block diagram of another embodiment of the system for enhancing an activated sludge process of this invention.
- Fig. 6 is a schematic block diagram of yet another embodiment of the system for enhancing an activated sludge process of this invention.
- Fig. 7 is a schematic block diagram showing the primary steps of the method for enhancing an activated sludge process of this invention.
- System 10 for enhancing an activated sludge process of this invention.
- System 10 includes at least one aeration tank 12 which receives a flow of wastewater (primary effluent) 14 by line 16.
- Aeration tank 12 introduces dissolved oxygen 18 from line 20 exposed to ambient air 22 to a population of microorganisms to promote growth of biological floes 23 in mixed liquor 24 (a combination of wastewater 14 and biological floes 23 defined by to a concentration of mixed liquor suspended solids (MLSS), e.g., about 8000 mg/L, or similar concentration of MLSS known by those skilled in the art.
- MLSS mixed liquor suspended solids
- System 10 also includes weighting agent impregnation subsystem 26 with impregnation tank 28 and mixer 30 which receives mixed liquor 24 from aeration tank 12 by line 32.
- Impregnation tank 28 also receives virgin weighting agent, indicated at 33, e.g., from feed hopper 34 by line 36, and recycled weighting agent, indicated at 38, from weight agent recovery subsystem 74 (discussed below).
- Weighting agent impregnation subsystem 26 mixes mixed liquor 24, the virgin weighting agent, and the recycled weighting agent in impregnation tank 28 to impregnate the weighting agent into biological floes 23 suspended in mixed liquor 24 to form weighted biological floes.
- mixer 30 utilizes a mixing energy in the range of about 1.5 HP/1000 ft 3 to about 100 HP/1000 ft 3 , e.g., about 25 HP/1000 ft 3 , or any similar mixing energy which is sufficient to impregnate the weighting agent into biological floes 23 suspended in mixed liquor 24 to form weighted biological floes.
- the weighted biological floes are then sent to aeration tank 12 by line 37.
- the weighting agent may be magnetite, or any similar type weighting agent or magnetically separable inorganic material known to those skilled in the art which increases the density of the biological floes.
- FIG. 2 shows one example of weighting agent 40 impregnated into biological floes 23 to form weighted biological floes 25.
- Fig. 1 also includes flocculant injection port 42 located downstream from aeration tank 12 which introduces flocculant 44 into mixed liquor 24 in line 35.
- Flocculant 44 enhances settling and thickening of the weighted biological floes suspended in mixed liquor 24 in secondary clarifier 46 and establishes agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes in secondary clarifier 46.
- flocculant 44 may be cationic or anionic polymer, such as Drewfloc ® 2270 (Ashland Chemical, New Jersey), or any similar type polymer known to those skilled in the art.
- the agglomeration of non-impregnated biological floes and/or partially impregnated floes with the weighted biological floes makes larger weighted biological floes to provide for rapid settling of the weighted biological floes in settling zone 64 of clarifier 46.
- Flocculant 44 also enhances settling and thickening of the weighted biological floes in thickening zone 66 of clarifier 46 by reducing the size of, and increasing the density of, the weighted biological floes.
- Secondary clarifier 46 separates and collects the weighted biological floes from the mixed liquor using rake or siphon subsystem 67 to provide secondary or clean effluent 50 in line 52 and settled sludge 54 at bottom 69 of clarifier 46.
- weighted biological floes have a greater specific gravity than non-impregnated biological floes, e.g., about 2.5, they settle faster in secondary clarifier 46 than non- impregnated biological floes utilized in a typical system for an activated sludge process.
- secondary clarifier 46 effectively and efficiently separates the weighted biological floes from the mixed liquor to provide secondary effluent 50.
- the time needed to separate weighted biological floes from mixed liquor 24 of the system 10 is reduced when compared to a typical activated sludge process.
- This increases the capacity of system 10 to process wastewater 14. Therefore, system 10 is more effective, efficient, reliable, cost effective, and robust than a typical system for an activated sludge process.
- clarifier 46 and/or aeration tank 12 can be reduced, allowing system 10 to treat the same quantity of wastewater in a smaller footprint. This reduces the installation costs and land requirements of system 10. Additionally, the problems associated with the separation process of the biological floes from the mixed liquor in the secondary clarifier, as discussed in the Background Section, are alleviated.
- System 10 preferably includes return activated sludge subsystem 70 which recycles the majority of settled sludge 54 in secondary clarifier 42 to aeration tank 12 by line 72 using pump 47.
- Weighting agent recovery subsystem 74 which receives the remaining settled sludge not sent to aeration tank 12 by line 74 and recovers the weighting agent from the settled sludge and reintroduces the weighting agent to weighting agent impregnation subsystem 26, as indicated at 38.
- weighting agent recovery subsystem 74 includes in line shear mixer 78 which shears the remaining settled sludge in line 76 to separate the weighting agent in the settled sludge in line 76 from the mixed liquor.
- Fig. 3 A shows a side-view of one example of in line shear mixer 78 which includes rotor 80 and stator 82.
- Shear mixer 78 is designed such that there is a close tolerance between a rotor 80 and stator 82. hi operation, rotor 80 is driven at high speeds, e.g., greater than about 10,000 r.p.m., in direction 83, Fig. 3B. The result is a shearing effect which separates the weighting agent from the biological floes in the remaining settled sludge in line 76 to facilitate recovery of the weighting agent by the weighting agent recovery subsystem 74.
- Weighting agent recovery subsystem 74 may include single pass wet drum magnetic separator 80, Fig. 1, which recovers the separated weighting agent from the remaining settled sludge processed by in line shear mixer 78 and reintroduces the recovered weighting agent into weighting agent impregnation subsystem 26, as shown at 38. Further details of single pass wet drum magnetic separator 80 are also disclosed in co-pending application Serial No. 11/893,350, filed August 15, 2007, entitled "Fluidic Sealing System For a Wet Drum Magnetic Separator" by one or more of the inventors hereof, incorporated by reference herein.
- System 10 also preferably includes wasting subsystem 82 which wastes the remaining settled sludge of weighting agent recovery subsystem 74, typically processed by wet drum magnetic separator 80, to control the population of the microorganisms in mixed liquor 24 in aeration tank 12.
- the capacity of system 10 to process wastewater 14 may be increased by increasing the concentration of the MLSS in aeration tank 12 by reducing the amount of settled sludge wasted by wasting subsystem 82.
- the amount of settled sludge wasted by wasting subsystem 82 may also be reduced to increase the concentration of MLSS in aeration tank 12 to enhance nitrification of ammonia in mixed liquor 24.
- the nitrification process may also be further enhanced by increasing the amount of dissolved oxygen 18 introduced to aeration tank 12 by line 20.
- Aeration tank 12' may include anoxic zone 84 with mixer 83 configured to remove nitrogen from mixed liquor 24.
- recycle line 100 connected to line 35 recycles mixed liquor 24 to anoxic zone 84, as shown by arrows 101.
- Aeration tank 12' may also include anaerobic zone 86 with mixer 87 configured to remove phosphorus from the mixed liquor 24
- line 72 of return activated sludge subsystem 70 recycles the settled sludge to anaerobic zone 84.
- Many other possible biological nutrient removal configurations may be utilized, as known to those skilled in the art.
- coagulant 88 may be added to aeration tank 12, as shown at 90, for removing phosphorus from mixed liquor 24 by precipitation and/or coagulation, as known by those skilled in the art.
- coagulant 88 may be added to flocculant injection port 42, as shown at 92, to remove phosphorus by precipitation and/or coagulation.
- coagulant 88 may be added to impregnation tank 28, as shown at 94, for removing phosphorus by precipitation and/or coagulation.
- the ratio of the weighting agent, e.g., magnetite or similar type materials known to those skilled in the art, to mixed liquor 24 is greater than about 1.5 to 1.0.
- secondary effluent 50 has a suspended solid concentration of less than about 30 mg/L, which may meet local, state, and federal guidelines for secondary effluent 50.
- system 10 includes weighting agent impregnation subsystem 26 which receives mixed liquor from aeration tank 12 by line 32 and dispenses the weighted biological floes into aeration tank by line 37, this is not a necessary limitation of this invention.
- weighting agent impregnation subsystem 26a Fig. 5, where like parts have been given like numbers, receives mixed liquor 24 from aeration tank 12 by line 32 and dispenses the weighted biological floes processed by weighting impregnation subsystem 26a by line 37 to line 35 between aeration tank 12 and secondary clarifier 12.
- system 10a in another design, includes weighting agent impregnation subsystem 26b which is located between aeration tank 12 and secondary clarifier 46.
- wastewater 14 may be from a brewery processing system or similar type processing system which has a high concentration of biodegradable organic matter in the incoming wastewater 14.
- system 10a does not need return activated sludge subsystem 70 as shown in Figs. 1 and 5 because enough organisms are grown from the removal of influent organic matter to maintain a suitable population of microorganisms in the mixed liquor 24.
- the method for enhancing an activated sludge process of this invention preferably comprises the steps of: receiving a flow of wastewater and introducing dissolved oxygen to a population of microorganisms to promote growth of the biological floes in a mixed liquor defined by a concentration of a mixed liquor suspended solids, step a) 200; Fig.
- step b) 202 7, impregnating weighting agent into the biological floes suspended in the mixed liquor to form weighted biological floes, step b) 202; introducing a flocculant to the mixed liquor to enhance settling and thickening of the weighted biological floes and to establish agglomeration of non-impregnated biological floes and/or partially impregnated biological floes with the weighted biological floes, step c) 204; separating and collecting the biological floes from the mixed liquor in at least one clarifier to provide a secondary effluent and a settled sludge, step d) 206; removing and shearing the settled sludge and recovering the weighting agent therefrom to reintroduce the weighting agent to step b) 202, step f) 208; and wasting the remaining settled sludge in step f) 208 to control the population in the mixed liquor, step g) 210.
- the details of the operation of steps 200-210 are
- the method may include the step of increasing the capacity of the activated sludge process by increasing the concentration of mixed liquor suspended solids in step a) 200 by reducing the amount of settled sludge removed in step f) 208 and step g) 210.
- Nitrification of ammonia in the mixed liquor may be enhanced by increasing the concentration of the mixed liquor suspended solids by reducing the amount of settled sludge removed in step f) 208 and step g) 210.
- the nitrification may be enhanced by increasing the oxygen introduced to the mixed liquor in step a) 200.
- the removal of nitrogen from the mixed liquor may be enhanced by utilizing at least one anoxic zone in step a) 200.
- the removal of phosphorus from the settled sludge may be enhanced by utilizing at least one anaerobic zone in step a) 200.
- the method of enhancing an activated sludge process may also include the step of adding a coagulant for removing phosphorus by precipitation and/or by coagulation.
- the method of enhancing an activated sludge process may utilize a weighting agent that includes magnetite or similar type weighting agent or magnetically separable inorganic material known by those skilled in the art.
- the method may utilize a flocculant that includes a cationic and/or anionic polymer.
- the ratio of the weighting agent to the mixed liquor may be greater than about 1.5 to 1.0.
- the method of enhancing an activated sludge process may also include the step of separating the weighting agent from the sheared settled sludge of step f) 208 by utilizing a single pass wet drum magnetic separator, e.g., wet drum magnetic separator 80, Fig. 1.
- the secondary effluent may have a total suspended solid concentration less than about 30 mg/L.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA 2675019 CA2675019C (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process |
BRPI0806315-0A BRPI0806315A2 (en) | 2007-01-09 | 2008-01-09 | system and method for improving an activated sludge process |
ES08724459T ES2699389T3 (en) | 2007-01-09 | 2008-01-09 | System and method to improve an active sludge process |
AU2008205248A AU2008205248B2 (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process |
JP2009545592A JP2010515567A (en) | 2007-01-09 | 2008-01-09 | System and method for promoting activated sludge treatment |
MX2009007407A MX2009007407A (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process. |
CN2008800009742A CN101568493B (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process |
EP08724459.6A EP2104649B1 (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87937307P | 2007-01-09 | 2007-01-09 | |
US60/879,373 | 2007-01-09 | ||
US99455307P | 2007-09-20 | 2007-09-20 | |
US60/994,553 | 2007-09-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008086010A1 true WO2008086010A1 (en) | 2008-07-17 |
Family
ID=39609011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/000323 WO2008086010A1 (en) | 2007-01-09 | 2008-01-09 | System and method for enhancing an activated sludge process |
Country Status (9)
Country | Link |
---|---|
US (1) | US7695623B2 (en) |
EP (1) | EP2104649B1 (en) |
JP (1) | JP2010515567A (en) |
AU (1) | AU2008205248B2 (en) |
BR (1) | BRPI0806315A2 (en) |
CA (1) | CA2675019C (en) |
ES (1) | ES2699389T3 (en) |
MX (1) | MX2009007407A (en) |
WO (1) | WO2008086010A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8470172B2 (en) | 2007-01-09 | 2013-06-25 | Siemens Industry, Inc. | System for enhancing a wastewater treatment process |
US8540877B2 (en) | 2007-01-09 | 2013-09-24 | Siemens Water Technologies Llc | Ballasted sequencing batch reactor system and method for treating wastewater |
US8623205B2 (en) | 2007-01-09 | 2014-01-07 | Siemens Water Technologies Llc | Ballasted anaerobic system |
US8840786B2 (en) | 2007-01-09 | 2014-09-23 | Evoqua Water Technologies Llc | System and method for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water |
US9651523B2 (en) | 2012-09-26 | 2017-05-16 | Evoqua Water Technologies Llc | System for measuring the concentration of magnetic ballast in a slurry |
US10919792B2 (en) | 2012-06-11 | 2021-02-16 | Evoqua Water Technologies Llc | Treatment using fixed film processes and ballasted settling |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120202210A1 (en) * | 2007-08-20 | 2012-08-09 | Northrop Grumman Systems Corporation | Biohazard detection system with exhaust stream recycling |
US8353641B2 (en) | 2008-02-14 | 2013-01-15 | Soane Energy, Llc | Systems and methods for removing finely dispersed particulate matter from a fluid stream |
US8945394B2 (en) | 2009-10-27 | 2015-02-03 | Soane Energy, Llc | System, methods, processes and apparatus for removing finely dispersed particulate matter from a fluid stream |
MX340615B (en) * | 2009-02-27 | 2016-07-18 | Soane Mining Llc | Systems, methods, processes and apparatus for removing finely dispersed particulate matter from a fluid stream. |
CN104386816B (en) * | 2009-07-08 | 2017-06-27 | 沙特阿拉伯石油公司 | Low concentration wastewater processing system and method |
CN102548912B (en) * | 2009-07-08 | 2015-06-17 | 沙特阿拉伯石油公司 | Wastewater treatment system and process including irradiation of primary solids |
US20110017674A1 (en) * | 2009-07-27 | 2011-01-27 | Michael Anthony Schober | Using Magnets or Electromagnets to Move Sewage Sludge |
US9150445B2 (en) * | 2011-08-09 | 2015-10-06 | Hsin-Ying Liu | Polyhydroxyalkanoate production during wastewater treatment |
US10807893B2 (en) | 2011-08-09 | 2020-10-20 | Hsinying Liu | Polyhydroxyalkanoate production during wastewater treatment |
US8845906B2 (en) * | 2011-12-23 | 2014-09-30 | Don E. Henley And Associates, Llc | Process for single system electrocoagulation, magnetic, cavitation and flocculation (EMC/F) treatment of water and wastewater |
CN102701514B (en) * | 2012-03-20 | 2013-12-25 | 刘智晓 | Method for improving treatment efficiency of sewage plant by utilizing bypass sludge activity enhancing technology |
US10464832B2 (en) * | 2012-09-21 | 2019-11-05 | D.C. Water & Sewer Authority | Apparatus for water treatment using a physical separator |
US10106446B2 (en) | 2012-10-22 | 2018-10-23 | Evoqua Water Technologies Llc | Wastewater overflow systems and methods |
WO2014160350A1 (en) * | 2013-03-14 | 2014-10-02 | Kuehnle Agrosystems, Inc. | Improved wastewater treatment systems and methods |
WO2014193466A1 (en) * | 2013-05-29 | 2014-12-04 | Oberon Fmr, Inc. | Wastewater treatment for the production of microbial biomass |
JP2015085252A (en) * | 2013-10-30 | 2015-05-07 | 株式会社日立製作所 | Water treatment method and apparatus |
US20150321937A1 (en) * | 2014-05-07 | 2015-11-12 | Veolia Water Solutions & Technologies Support | Method and system for treating wastewater in an integrated fixed film activated sludge sequencing batch reactor |
CN109311711B (en) | 2016-06-06 | 2022-06-24 | 懿华水处理技术有限责任公司 | Removal of heavy metals in ballasting processes |
CA3070771A1 (en) * | 2017-08-18 | 2019-02-21 | Evoqua Water Technologies Llc | Treatment of liquid streams containing high concentrations of solids using ballasted clarification |
CN115353183B (en) * | 2022-08-29 | 2023-08-08 | 淄博市临淄恒兴化工厂有限公司 | Flocculant for sewage treatment and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5266200A (en) * | 1991-04-17 | 1993-11-30 | Reid John H | Sequence continuous reaction in complete mix activated sludge systems |
US5395527A (en) * | 1993-07-01 | 1995-03-07 | Eco Equipement Fep Inc. | Process and apparatus for treating wastewater in a dynamic, bio sequenced manner |
US6099738A (en) * | 1997-12-17 | 2000-08-08 | Micromag Corporation | Method and system for removing solutes from a fluid using magnetically conditioned coagulation |
US6960294B2 (en) * | 2001-06-12 | 2005-11-01 | Hydrotreat, Inc. | Apparatus for the separation of solids from liquids by dissolved gas floatation |
Family Cites Families (103)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US531183A (en) * | 1894-12-18 | harris | ||
US438579A (en) * | 1890-10-14 | And samuel g | ||
US653010A (en) * | 1899-12-20 | 1900-07-03 | Charles Herschel Koyl | Apparatus for purifying water. |
US2065123A (en) * | 1933-11-20 | 1936-12-22 | Pacific Flush Tank Co | Sewage treatment |
US2129267A (en) * | 1935-02-28 | 1938-09-06 | Dorr Co Inc | Sewage treatment |
US2232294A (en) * | 1938-07-08 | 1941-02-18 | Charles H Lewis | Process for treating liquids |
US2232296A (en) * | 1938-07-18 | 1941-02-18 | Charles H Lewis | Process for treating liquids |
US2391494A (en) * | 1939-12-13 | 1945-12-25 | American Well Works | Method and apparatus for treating sewage |
US2401924A (en) * | 1940-07-24 | 1946-06-11 | Permutit Co | Removal of silica from water |
US2268461A (en) * | 1940-11-06 | 1941-12-30 | Jeffrey Mfg Co | Apparatus for producing flocculation |
US2359748A (en) * | 1942-04-23 | 1944-10-10 | Dorr Co | Treatment of water softening sludge |
LU29833A1 (en) * | 1945-10-06 | |||
US2713028A (en) * | 1951-04-20 | 1955-07-12 | Jenks Harry Neville | Sewage treatment |
US2825464A (en) * | 1954-01-22 | 1958-03-04 | Packard Water Conditioners Inc | Water treatment device |
US3142638A (en) * | 1962-06-29 | 1964-07-28 | Blaisdell Donald Stapf | Process for separating solids from sewage |
US3228878A (en) * | 1963-05-06 | 1966-01-11 | Howard S O Neal | Method and apparatus for treatment of flowing liquids to control deposition of solid matter therefrom |
FR1411792A (en) | 1964-08-04 | 1965-09-24 | Nikex Nehezipari Kulkere | Process for clarifying and purifying surface water and industrial water containing suspended matter |
US3350302A (en) * | 1964-09-16 | 1967-10-31 | Nikex Nehezipari Kulkere | Clarification of surface waters |
US3697420A (en) * | 1968-03-19 | 1972-10-10 | Donald Stapf Blaisdell | Method and apparatus for treatment of aqueous liquor |
US3575852A (en) * | 1969-06-06 | 1971-04-20 | American Colloid Co | Method for treating waste water containing dissolved phosphates |
US3617561A (en) * | 1969-07-01 | 1971-11-02 | Engelhard Min & Chem | Method for clarifying liquids |
US3676337A (en) * | 1970-07-09 | 1972-07-11 | Massachusetts Inst Technology | Process for magnetic separation |
CH529587A (en) * | 1970-10-22 | 1972-10-31 | Von Roll Ag | Device for the production of blocks |
DE7138603U (en) * | 1971-10-12 | 1972-06-15 | Passavant Werke | Device for mechanical-chemical water treatment and wastewater treatment |
BE791202A (en) * | 1971-11-12 | 1973-03-01 | Gustavsbergs Fabriker Ab | LAMELLAR SEPARATOR |
US3983033A (en) * | 1973-03-26 | 1976-09-28 | Massachusetts Institute Of Technology | Process for removing dissolved phosphorus from water magnetically |
US3951807A (en) * | 1973-09-20 | 1976-04-20 | Sanderson Charles H | Water conditioning apparatus |
US4151090A (en) * | 1974-05-30 | 1979-04-24 | Brigante Miguel F | Unitary package for water treatment for attachment to home hot water heater |
US3959133A (en) * | 1974-09-11 | 1976-05-25 | Metcalf & Eddy, Inc. | Alum recovery and waste disposal in water treatment |
JPS51142860A (en) * | 1975-04-30 | 1976-12-08 | Dowa Mining Co Ltd | Method for oxidation treatment of fe2+ in waste liquor |
US3977966A (en) * | 1975-09-24 | 1976-08-31 | Sterling Drug Inc. | Purification of non-biodegradable industrial wastewaters |
US4089779A (en) * | 1975-11-24 | 1978-05-16 | Georgia-Pacific Corporation | Clarification process |
US4193866A (en) * | 1976-09-27 | 1980-03-18 | General Electric Company | Ferrite flocculating system |
AT346252B (en) * | 1976-11-23 | 1978-11-10 | Mach Guido | PROCESS FOR DESALINATING WATER AND DEVICE FOR CARRYING OUT THE PROCESS |
CH615597A5 (en) | 1977-01-26 | 1980-02-15 | Sulzer Ag | Process and apparatus for settling settleable particles contained in liquids |
US4153559A (en) * | 1977-05-20 | 1979-05-08 | Sanderson Charles H | Water treatment device and method for manufacturing same |
US4274968A (en) * | 1977-06-15 | 1981-06-23 | Standard Oil Company (Indiana) | Process for the purification of water |
US4190539A (en) * | 1978-08-16 | 1980-02-26 | Ferdinand Besik | Apparatus for on-site renovation of sanitary waters |
US4320012A (en) * | 1979-01-22 | 1982-03-16 | Palm Gordon F | Neutralization of phosphoric acid waste waters |
US4388195A (en) * | 1979-07-05 | 1983-06-14 | Passavant-Werke Michelbacher Hutte | Process and apparatus for the chemical-mechanical treatment and purification of ground waters, surface waters and effluents |
FR2460895A1 (en) * | 1979-07-13 | 1981-01-30 | Nippon Kokan Kk | SCALING TREATMENT AGENT AND ITS APPLICATION TO THE REMOVAL OF DISSOLVED HEAVY METALS |
US4357237A (en) * | 1979-11-28 | 1982-11-02 | Sanderson Charles H | Device for the magnetic treatment of water and liquid and gaseous fuels |
US4402833A (en) * | 1979-12-13 | 1983-09-06 | Occidental Chemical Corporation | Waste water treatment system for elemental phosphorous removal |
CA1181653A (en) * | 1981-03-24 | 1985-01-29 | Alban Timmons | Process and composition for conditioning an aqueous system |
AU554857B2 (en) * | 1981-04-06 | 1986-09-04 | Commonwealth Scientific And Industrial Research Organisation | Water clarification |
US4465597B2 (en) * | 1981-08-10 | 1997-07-01 | Tetra Tech | Treatment of industrial wastewaters |
JPS5852718B2 (en) * | 1981-12-01 | 1983-11-24 | 清進産業株式会社 | Method and device for separating suspended matter in wastewater treatment |
JPS58133804A (en) | 1982-02-01 | 1983-08-09 | ユニオン・カ−バイド・コ−ポレ−シヨン | Control of transfer of aluminum traversing dialytic membrane |
FR2553082B1 (en) * | 1983-10-07 | 1987-08-28 | Degremont | APPARATUS FOR TREATING WATER BY PRECIPITATION, SEPARATION, THICKENING AND RECIRCULATION OF FORMED SLUDGE |
GB8409410D0 (en) * | 1984-04-11 | 1984-05-23 | Hydro Int Ltd | Water treatment |
US4654139A (en) * | 1984-06-08 | 1987-03-31 | Hitachi, Ltd. | Flocculation basin in water treatment process |
US4765908A (en) * | 1985-02-04 | 1988-08-23 | Barbara Monick | Process and composition for removing contaminants from wastewater |
DE3526183A1 (en) * | 1985-07-23 | 1987-02-05 | Bayer Ag | METHOD FOR IMPROVED SEPARATION OF THE CLEANING LIQUID FROM THE BIOMASS IN BIOLOGICAL WASTE WATER TREATMENT |
US4689154A (en) * | 1985-11-15 | 1987-08-25 | Occidental Chemical Corporation | Process for removing phosphorus from industrial waste water |
WO1988001985A1 (en) * | 1986-09-16 | 1988-03-24 | Commonwealth Scientific And Industrial Research Or | Sewage treatment |
US4765900A (en) * | 1987-02-13 | 1988-08-23 | Vertech Treatment Systems, Inc. | Process for the treatment of waste |
US4872993A (en) * | 1988-02-24 | 1989-10-10 | Harrison George C | Waste treatment |
FR2627704B1 (en) * | 1988-02-25 | 1991-12-13 | Ile France Syndicat Eaux | METHOD AND PLANT FOR TREATMENT OF WATER BY DECANTATION USING FINE SAND |
US5369072A (en) * | 1988-05-10 | 1994-11-29 | University Of Washington | Granular media for removing contaminants from water and methods for making the same |
US5023012A (en) * | 1988-10-04 | 1991-06-11 | Pieter Walter William Buchan | Purification of water |
FR2643065B1 (en) * | 1989-02-14 | 1991-06-14 | Omnium Traitement Valorisa | METHOD AND INSTALLATION FOR BIOLOGICAL TREATMENT, INCLUDING NITRIFICATION AND DENITRATION, OF WASTE WATER TO BE TREATED |
US4940550A (en) * | 1989-05-02 | 1990-07-10 | The Curators Of The University Of Missouri | Multi-step process for concentrating magnetic particles in waste sludges |
IL91014A (en) * | 1989-07-17 | 1994-01-25 | Lin Israel J | Magnetic treatment of water used for agricultural purpose |
CA2019185C (en) * | 1990-06-18 | 1996-10-22 | L. Claude Hebert | Treatment of liquids using magnetics |
US5064531A (en) * | 1990-07-26 | 1991-11-12 | Int'l Environmental Systems, Inc. | Water filtration apparatus |
US5234603A (en) * | 1991-06-04 | 1993-08-10 | Analytical Development Corporation | Methods employing a zirconium salt for use in wastewater treatment |
GB9115018D0 (en) * | 1991-07-11 | 1991-08-28 | Bradtec Ltd | Purification of solutions |
US5112494A (en) * | 1991-09-03 | 1992-05-12 | Mobil Oil Corporation | Removal of cyanide from water |
US5443719A (en) * | 1994-02-23 | 1995-08-22 | Aqua-Ion Systems, Inc. | System and reactor for mixing coagulating agents into a contaminated water flow, and for removing contaminants therefrom |
JPH07299495A (en) * | 1994-03-09 | 1995-11-14 | Meidensha Corp | Nitrification accelerating method for activated sludge circulation modulating method and method for predicting nitrification rate |
US5840195A (en) * | 1995-05-01 | 1998-11-24 | Omnium De Traitement Et De Valorisation | Method and installation for treating an untreated flow by simple sedimentation after ballasting with fine sand |
FR2719234B1 (en) * | 1994-05-02 | 1999-08-13 | Omnium Traitement Valorisa | Method and installation for treating a raw flow by simple decantation after ballasting with fine sand. |
FR2719235B1 (en) * | 1994-05-02 | 1996-07-19 | Omnium Traitement Valorisa | Process and installation for clarifying biological sludge by decantation. |
US5597479A (en) * | 1995-01-25 | 1997-01-28 | Aqua-Ion Systems, Inc. | Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization |
US5560493A (en) * | 1995-03-14 | 1996-10-01 | Pacific Electric Motor Company | Diffuser for a magnetic separator |
JPH08257583A (en) * | 1995-03-23 | 1996-10-08 | Kurita Water Ind Ltd | Waste water treatment apparatus |
US5779908A (en) * | 1995-07-19 | 1998-07-14 | Sorin, Inc. | Method and apparatus for waste water treatment |
FR2751320B1 (en) * | 1996-07-18 | 1998-09-18 | Omnium Traitement Valorisa | FLUIDIZED BED WATER TREATMENT PLANT AND PHYSICO-CHEMICAL DECANTATION AND METHODS FOR IMPLEMENTING SUCH A PLANT |
US5800717A (en) * | 1996-10-02 | 1998-09-01 | Microsep International Corporation | Water and wastewater treatment system with internal recirculation |
FR2758812B1 (en) * | 1997-01-27 | 1999-07-09 | Degremont | PROCESS FOR THE PHYSICO-CHEMICAL TREATMENT OF EFFLUENTS, IN PARTICULAR SURFACE WATER INTENDED FOR CONSUMPTION |
JP3691650B2 (en) * | 1997-12-11 | 2005-09-07 | 株式会社日立製作所 | Water treatment method and control device |
FR2787781B1 (en) * | 1998-12-29 | 2001-03-23 | Amenagement Urbain & Rural | WATER TREATMENT WITH INJECTED BALLAST |
JP3575312B2 (en) * | 1999-02-10 | 2004-10-13 | 栗田工業株式会社 | Organic wastewater treatment method |
US6228269B1 (en) * | 1999-10-19 | 2001-05-08 | Steven Cort | Methods for treating wastewater containing hard-to-filter solids, in particular photoresist and paint sludges |
JP2001170404A (en) * | 1999-12-15 | 2001-06-26 | Hitachi Ltd | Magnetic separator |
US6896815B2 (en) * | 2001-05-30 | 2005-05-24 | Steven L. Cort | Methods for removing heavy metals from water using chemical precipitation and field separation methods |
US7255793B2 (en) * | 2001-05-30 | 2007-08-14 | Cort Steven L | Methods for removing heavy metals from water using chemical precipitation and field separation methods |
JP3773169B2 (en) * | 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 |
US7153431B2 (en) * | 2005-03-22 | 2006-12-26 | I. Kruger Inc. | Method and system for utilizing activated sludge in a ballasted flocculation process to remove BOD and suspended solids |
US20070039894A1 (en) | 2005-08-17 | 2007-02-22 | Cort Steven L | Water treatment using magnetic and other field separation technologies |
WO2008039936A2 (en) | 2006-09-27 | 2008-04-03 | Cort Steven L | Magnetic seeding and separation technology for treating water |
US20080073282A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | Device and Methods for Shearing Magnetic Floc in a Water Treatment System |
US7820053B2 (en) * | 2006-09-27 | 2010-10-26 | Cort Steven L | Magnetic separation and seeding to improve ballasted clarification of water |
US20080073280A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | Device for Removing Magnetic Floc from a Magnetic Collector in a Water Treatment System |
US20080073283A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | Magnetic Separator for Water Treatment System |
US20080073281A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | Method and Apparatus for Batch Treating Water Utilizing Magnetic Separation |
US7625490B2 (en) * | 2006-09-27 | 2009-12-01 | Cort Steven L | Use of a magnetic separator to biologically clean water |
US20080073284A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | Device and method for utilizing magnetic seeding and separation in a water treatment system |
US7686960B2 (en) * | 2006-09-27 | 2010-03-30 | Cort Steven L | Multistage process for treating water utilizing in one stage magnetic seed to sorb dissolved contaminants, and in another stage utilizing magnetic seed to clarify the water |
US20080073279A1 (en) * | 2006-09-27 | 2008-03-27 | Cort Steven L | High Rate Clarification of Cooling Water Using Magnetite Seeding and Separation |
US7691269B2 (en) * | 2006-09-27 | 2010-04-06 | Cort Steven L | Method and system for retrofitting an existing water treatment system |
US20080164183A1 (en) * | 2007-01-09 | 2008-07-10 | Marston Peter G | Collection system for a wet drum magnetic separator |
CN101568388B (en) * | 2007-01-09 | 2013-09-18 | 西门子工业公司 | A system for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water |
-
2008
- 2008-01-09 EP EP08724459.6A patent/EP2104649B1/en active Active
- 2008-01-09 CA CA 2675019 patent/CA2675019C/en active Active
- 2008-01-09 BR BRPI0806315-0A patent/BRPI0806315A2/en not_active IP Right Cessation
- 2008-01-09 ES ES08724459T patent/ES2699389T3/en active Active
- 2008-01-09 MX MX2009007407A patent/MX2009007407A/en active IP Right Grant
- 2008-01-09 WO PCT/US2008/000323 patent/WO2008086010A1/en active Application Filing
- 2008-01-09 US US12/008,216 patent/US7695623B2/en active Active
- 2008-01-09 JP JP2009545592A patent/JP2010515567A/en active Pending
- 2008-01-09 AU AU2008205248A patent/AU2008205248B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5266200A (en) * | 1991-04-17 | 1993-11-30 | Reid John H | Sequence continuous reaction in complete mix activated sludge systems |
US5395527A (en) * | 1993-07-01 | 1995-03-07 | Eco Equipement Fep Inc. | Process and apparatus for treating wastewater in a dynamic, bio sequenced manner |
US6099738A (en) * | 1997-12-17 | 2000-08-08 | Micromag Corporation | Method and system for removing solutes from a fluid using magnetically conditioned coagulation |
US6960294B2 (en) * | 2001-06-12 | 2005-11-01 | Hydrotreat, Inc. | Apparatus for the separation of solids from liquids by dissolved gas floatation |
Non-Patent Citations (1)
Title |
---|
See also references of EP2104649A4 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8470172B2 (en) | 2007-01-09 | 2013-06-25 | Siemens Industry, Inc. | System for enhancing a wastewater treatment process |
US8506800B2 (en) | 2007-01-09 | 2013-08-13 | Siemens Industry, Inc. | System for enhancing a wastewater treatment process |
US8540877B2 (en) | 2007-01-09 | 2013-09-24 | Siemens Water Technologies Llc | Ballasted sequencing batch reactor system and method for treating wastewater |
US8623205B2 (en) | 2007-01-09 | 2014-01-07 | Siemens Water Technologies Llc | Ballasted anaerobic system |
US8673142B2 (en) | 2007-01-09 | 2014-03-18 | Siemens Water Technologies Llc | System for enhancing a wastewater treatment process |
US8702987B2 (en) | 2007-01-09 | 2014-04-22 | Evoqua Water Technologies Llc | Methods for enhancing a wastewater treatment process |
US8840786B2 (en) | 2007-01-09 | 2014-09-23 | Evoqua Water Technologies Llc | System and method for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water |
US8845901B2 (en) | 2007-01-09 | 2014-09-30 | Evoqua Water Technologies Llc | Ballasted anaerobic method for treating wastewater |
US10023486B2 (en) | 2007-01-09 | 2018-07-17 | Evoqua Water Technologies Llc | Ballasted sequencing batch reactor system and method for treating wastewater |
US10919792B2 (en) | 2012-06-11 | 2021-02-16 | Evoqua Water Technologies Llc | Treatment using fixed film processes and ballasted settling |
US9651523B2 (en) | 2012-09-26 | 2017-05-16 | Evoqua Water Technologies Llc | System for measuring the concentration of magnetic ballast in a slurry |
Also Published As
Publication number | Publication date |
---|---|
EP2104649A1 (en) | 2009-09-30 |
EP2104649A4 (en) | 2012-07-18 |
US7695623B2 (en) | 2010-04-13 |
CA2675019A1 (en) | 2008-07-17 |
US20080203015A1 (en) | 2008-08-28 |
EP2104649B1 (en) | 2018-09-19 |
JP2010515567A (en) | 2010-05-13 |
AU2008205248A1 (en) | 2008-07-17 |
ES2699389T3 (en) | 2019-02-11 |
AU2008205248B2 (en) | 2010-07-01 |
MX2009007407A (en) | 2009-11-02 |
CA2675019C (en) | 2014-08-05 |
BRPI0806315A2 (en) | 2011-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7695623B2 (en) | System and method for enhancing an activated sludge process | |
CN101568493B (en) | System and method for enhancing an activated sludge process | |
EP2475623B1 (en) | System and method for wastewater treatment | |
AU2893999A (en) | Surge anoxic mix sequencing batch reactor systems | |
AU2015256436B2 (en) | Method and system for treating wastewater in an integrated fixed film activated sludge sequencing batch reactor | |
WO2007008630A2 (en) | Floating sequencing batch reactor and method for wastewater treatment | |
EP3148943B1 (en) | Method for clarification of wastewater | |
JP6505684B2 (en) | Reduction of substances in contaminated fluids using natural product growth media | |
CN111032177B (en) | Treatment of liquid streams containing high concentrations of solids using ballasted clarification | |
JP5270247B2 (en) | Wastewater treatment facility at food processing plant | |
Ødegaard et al. | High rate biological/chemical treatment based on the moving bed biofilm process combined with coagulation | |
US20060266704A1 (en) | Biological filtration module for use within a wastewater treatment system | |
Colic et al. | Flocculation-Flotation Enables Anaerobic-Aerobic Bioreactors Treatment and Reuse of High Load Tortilla Manufacturing Wastewater | |
MXPA98006397A (en) | Equalization basin-reactor system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200880000974.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08724459 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2009545592 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008205248 Country of ref document: AU Ref document number: 2675019 Country of ref document: CA Ref document number: MX/A/2009/007407 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1308/MUMNP/2009 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008724459 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2008205248 Country of ref document: AU Date of ref document: 20080109 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: PI0806315 Country of ref document: BR Kind code of ref document: A2 Effective date: 20090709 |