WO2011031305A1 - System and method for enhancing a wastewater treatment process - Google Patents

System and method for enhancing a wastewater treatment process Download PDF

Info

Publication number
WO2011031305A1
WO2011031305A1 PCT/US2010/002443 US2010002443W WO2011031305A1 WO 2011031305 A1 WO2011031305 A1 WO 2011031305A1 US 2010002443 W US2010002443 W US 2010002443W WO 2011031305 A1 WO2011031305 A1 WO 2011031305A1
Authority
WO
WIPO (PCT)
Prior art keywords
weighting agent
subsystem
biological
floes
separator
Prior art date
Application number
PCT/US2010/002443
Other languages
English (en)
French (fr)
Inventor
Steven Woodard
Peter G. Marston
Ionel Wechsler
Original Assignee
Cambridge Water Technology, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Water Technology, Inc. filed Critical Cambridge Water Technology, Inc.
Priority to SG2012015012A priority Critical patent/SG178962A1/en
Priority to EP10815736.3A priority patent/EP2475623B8/en
Priority to CN2010800398536A priority patent/CN102574714A/zh
Priority to BR112012005131A priority patent/BR112012005131A2/pt
Priority to IN1995DEN2012 priority patent/IN2012DN01995A/en
Priority to AU2010293066A priority patent/AU2010293066C1/en
Priority to CA2773310A priority patent/CA2773310C/en
Priority to MX2012002839A priority patent/MX2012002839A/es
Publication of WO2011031305A1 publication Critical patent/WO2011031305A1/en
Priority to ZA2012/01688A priority patent/ZA201201688B/en

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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/286—Anaerobic digestion processes including two or more steps
    • 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
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
    • 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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1263—Sequencing batch reactors [SBR]
    • 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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2813—Anaerobic digestion processes using anaerobic contact 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
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • 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
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
    • 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 a wastewater treatment 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 a biological reactor(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 biological reactor(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 biological reactor 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 often 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 may be 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 clarifiers, excessive secondary clarifier surface overflow rate, and the like.
  • Sequencing batch reactor (SBR) systems may also be used to treat wastewater.
  • a typical conventional SBR system includes one or more sequencing batch reactors which contains a large population of microorgamsms that ingest contaminants in the influent wastewater to form biological floes and treat the wastewater.
  • the biological floes settle slowly because they are only marginally heavier than water.
  • the solids separation in the settling phase is also unreliable due to the many types of settling problems discussed above. This can result in reduced treatment capacity and/or compromised effective quality.
  • Another method of treating wastewater is to use an anaerobic treatment reactor.
  • the anaerobic treatment reactor creates an anaerobic environment which contains a population of microorganisms that ingest contaminants in the influent wastewater to form biological floes and treat the wastewater.
  • the wastewater is typically fed near the bottom of the anaerobic treatment reactor and into a sludge blanket where the microorganisms consume the waste therein.
  • wastewater fed into the bottom of the anaerobic treatment reactor flows upward through the anaerobic sludge blanket to treat the wastewater.
  • microorganisms in the treated effluent which may compromise the quality of the treated effluent.
  • This invention features a system for enhancing an activated sludge process including at least one biological reactor.
  • a weighting agent impregnation subsystem is coupled to the biological reactor for mixing biological floes and weighting agent to impregnate the weighting agent into the biological floes to form weighted biological floes.
  • a weighting agent recovery subsystem is configured to recover the weighting agent from the weighted biological floes and reintroduce the recovered weighting agent to the weighting agent impregnation subsystem.
  • the weighting agent recovery subsystem may include a separator subsystem for separating the weighting agent from the weighted biological floes.
  • the separator subsystem may include a shear mill.
  • the separator subsystem may include a centrifugal separator.
  • the separator subsystem may include an ultrasonic separator.
  • the separator subsystem may include a shear mill and a wet drum magnetic separator.
  • the separator subsystem may include a shear mill and a centrifugal separator.
  • the separator subsystem may include an ultrasonic separator and a wet drum magnetic separator.
  • the separator subsystem may include an ultrasonic separator and a centrifugal separator.
  • the shear mill may include rotor and a stator, wherein the rotor and/or the stator include slots sized as to optimize separation of weighting agent from the weighted biological floes.
  • the weighting agent impregnation subsystem may include a weighting agent storage tank and at least one line.
  • the weighting agent impregnation subsystem may include a weighting agent feeder subsystem configured to control the delivery rate of the weighting agent from the weighting agent storage tank to the weighting agent impregnation tank.
  • the weighting agent feeder subsystem may include a pneumatic feeder subsystem.
  • the pneumatic feeder subsystem may include porous media disposed on selected areas of the inside of the weighting agent storage tank and the inside of the at least one line.
  • the pneumatic feeder subsystem may be configured to deliver a controlled supply of compressed air to the porous media to regulate fluidization and delivery of the weighting agent to the weighting agent impregnation tank.
  • the weighting agent impregnation subsystem may include an impregnation tank and at least one mixer.
  • the weighting agent impregnation subsystem may include a venturi mixer/eductor.
  • the majority of the weighting agent may have a particle size less than about 100 ⁇ .
  • the majority of the weighting agent may have a particle size less than about 40 ⁇ .
  • the majority of the weighting agent may have a particle size less than about 20 ⁇ .
  • the weighting agent may include magnetite.
  • the biological reactor may include at least one aeration tank and/or one or more sequencing batch reactors 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.
  • the at least one biological reactor may be configured as at least one anaerobic treatment reactor.
  • the system may include a flocculant injection subsystem configured to introduce a flocculant to the mixed liquor to enhance settling and thickening of weighted biological floes and to provide agglomeration of non- impregnated biological floes and/or partially impregnated biological floes with weighted biological floes.
  • the system may include at least one clarifier configured to collecting the weighted biological floes from the mixed liquor and configured to provide a secondary effluent and a settled sludge.
  • the system may include a return activated sludge subsystem configured to recycle the majority of settled sludge to the biological reactor and/or to the weighting impregnation subsystem.
  • the system may further include a wasting subsystem configured to waste remaining settled sludge of the weighting agent recovery subsystem to control the population of the microorganisms in the mixed liquor.
  • the capacity of the system may be increased by increasing the concentration of mixed liquor suspended solids in the biological reactor by reducing the amount of the settled sludge wasted by the wasting subsystem.
  • the amount of 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 biological reactor.
  • the biological reactor may include at least one anoxic zone configured to remove nitrogen from the mixed liquor.
  • the biological reactor may include at least one anaerobic zone configured to remove phosphorus from the settled sludge.
  • the system may further include a coagulant addition subsystem for adding coagulant to remove phosphorus by precipitation and/or coagulation.
  • the coagulant addition subsystem may add to coagulant to the weighting agent impregnation subsystem and/or the at least one biological reactor and/or the flocculant injection subsystem to remove phosphorus by precipitation and/or coagulation.
  • the weighting agent to a mixed liquor may be greater than about 1 :5 to 1.
  • the system secondary effluent may have a total suspended solids concentration less than about 30 mg/L.
  • the weighting agent impregnation subsystem may be located downstream from the biological reactor and before the secondary clarifier.
  • This invention also features a system for enhancing an activated sludge process including at least one biological reactor.
  • a weighting agent impregnation subsystem coupled to the biological reactor for mixing biological floes and weighting agent having particle size less than about 100 ⁇ to impregnate the weighting agent into the biological floes to form weighted biological floes.
  • a weighting agent recovery subsystem is configured to recover the weighting agent from the weighted biological floes and reintroducing the recovered weighting agent to the weighting agent impregnation subsystem.
  • the majority of the weighting agent may have a particle size less than about 40 ⁇ .
  • the majority of the weighting agent may have a particle size less than about 20 ⁇ .
  • This invention also features a method for enhancing a wastewater treatment process, the method including: a) receiving influent wastewater in at least one biological reactor, b) forming biological floes in the biological reactor, c) impregnating weighting agent into the biological floes to form weighted biological floes, and d) recovering weighting agent from the weighted biological floes to reintroduce the weighting agent to step c).
  • the method may include the step of separating the weighting agent from the weighted biological floes.
  • the method may include the step of collecting the weighting agent and recycling the weighting agent to step c).
  • the method may include the step of providing weighting agent in which the majority of the weighting agent has a particle size less than about 100 ⁇ .
  • the method may include the step of providing weighting agent in which the majority of the weighting agent has a particle size less than about 40 ⁇ .
  • the method may include the step of providing weighting agent in which the majority of the weighting agent has a particle size less than about 20 ⁇ .
  • the method may include the step of 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.
  • the method may further include the step of 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 a wastewater treatment process of this invention
  • Fig. 2 is a schematic side view showing in further detail one embodiment of the weighting agent feeder subsystem shown in Fig. 1 ;
  • Fig. 3 is a microscopic photograph showing one example of weighting agent impregnated into a biological floes to form a weighted biological floes in accordance with this invention
  • Fig. 4 is a schematic side-view showing another embodiment of the weighting agent impregnation subsystem shown in Fig. 1 ;
  • Fig. 5 A is a schematic side-view of one embodiment of the separator shown in
  • Fig. 5B is a schematic top view showing one example of slots in the rotor and stator of the shear mill shown in Fig. 5 A;
  • Fig. 5C is a three-dimensional view of one embodiment of the shear mill in Fig.
  • Fig. 6 is a three-dimensional front-view of another embodiment of the separator shown in Fig. 1 ;
  • Fig. 7 is a three-dimensional front-view of yet another embodiment of the separator shown in Fig. 1 ;
  • Fig. 8 is a three-dimensional front-view of one example of a wet drum magnetic separator which may be utilized by the weighting agent recovery subsystem shown in Fig. 1;
  • Fig. 9 is a three-dimensional view of another embodiment of the system for enhancing a wastewater treatment process of this invention.
  • Fig. 10 is a schematic block diagram of one embodiment of the biological reactor shown in Fig. 9 including an anoxic zone configured to remove nitrogen and an anaerobic zone configured to remove phosphorus;
  • Fig. 11 is a schematic side-view of another embodiment of the system for enhancing a wastewater treatment process of this invention.
  • Fig. 12 is a schematic side-view of yet another embodiment of the system for enhancing a wastewater treatment process of this invention.
  • Fig. 13 is a schematic block diagram showing one embodiment of the primary steps of the method for enhancing a wastewater treatment process of this invention.
  • System 10 for enhancing a wastewater treatment process of this invention.
  • System 10 may be used to enhance wastewater treatment processes, including, inter alia, activated sludge wastewater treatment processes, SBR processes, anaerobic treatment reactor processes, or any other similar type wastewater treatment processes.
  • system 10 includes at least one biological reactor 12, e.g., an aeration tank, which receives a flow of wastewater 14 by line 16.
  • Biological reactor 12 preferably introduces dissolved oxygen 18 by line 20 exposed to ambient air 22 to a population of microorganisms to promote growth of biological floes 23 in mixed liquor 24.
  • Mixed liquor 24 is typically a combination of wastewater 14 and biological floes 23 and may be defined by a concentration of mixed liquor suspended solids (MLSS).
  • system 10 may also be used to enhance an anaerobic treatment process.
  • biological reactor 12 is configured as an anaerobic treatment reactor. To do this, no oxygen is introduced to reactor 12 and an anaerobic environment is created therein.
  • System 10 also includes weighting agent impregnation subsystem 26 which, in one embodiment, preferably includes weighting agent storage tank 34 coupled to line 36, weighting agent impregnation tank 28, and mixer 30.
  • Weighting agent impregnation tank 28 receives mixed liquor 24 from biological reactor 12 by line 32 or settled sludge from the bottom of biological reactor 12 via line 77.
  • Impregnation tank 28 preferably receives virgin weighting agent 33, e.g., from weighting agent storage tank 34 by line 36, as shown at 35, and/or recycled weighting agent 38 from weight agent recovery subsystem 74.
  • weighting agent impregnation subsystem 26 preferably includes weighting agent feeder subsystem 110 configured to control the delivery rate of virgin weighting agent 33 to weighting agent impregnation tank 28.
  • Weighting agent feeder subsystem 110 typically includes pneumatic feeder subsystem 112 which includes porous media 114, e.g., a plurality of stainless steel screens disposed on selected areas of the inside of weighting agent storage tank 34, e.g., areas 116 and 118 at the bottom of weighting agent storage tank 34. Porous media 114 is also preferably disposed on the inside of line 36.
  • pneumatic feeder subsystem 110 is configured to regulate supply of compressed air 120 by lines 121 to the porous media 114 in tank 34 and in line 36 to regulate the delivery rate of weighting agent 33 delivered to weighting agent impregnation tank 28.
  • porous media 114 may be a porous 316 stainless steel material with an ultra-smooth finished contact surface made for precise control of permeability and strength.
  • Porous media 114 produces an evenly distributed layer of air 120 that fluidizes weighting agent 33 in areas 116 and 118 of storage tank 34 and in line 36 above porous media 114.
  • the boundary layer above porous media 114 reduces buildup, friction, and wear. It also makes weighting agent 33 easier to convey by eliminating compaction and drag of weighting agent 33 in areas 116 and 118 of storage tank 34 and in line 36.
  • One example of pneumatic feeder subsystem is available from Young Industries (Muncie, PA).
  • the delivery rate of weighting agent 33 to weighting agent impregnation tank 28, Fig. 1, is controlled by regulating the amount of air 120, Fig. 2, delivered by lines 121 to porous media 114.
  • Higher rates of weighting agent 33 delivered to weighting agent impregnation tank 28 may be used for initially impregnating the entire population of biological floes 23 in biological reactor 12 and a secondary clarifier (discussed below) with weighting agent. Thereafter, a maintenance dose of weighting agent 33 may be supplied to weighting agent impregnation tank 28 to maintain a desired concentration of weighting agent.
  • Mixer 30 mixes the mixed liquor or the settled sludge in tank 28 with virgin weighting agent 33 and/or the recycled weighting agent 38 to impregnate the weighting agent into the biological floes in mixed liquor or the settled sludge to form weighted biological floes.
  • Mixer 30 preferably utilizes a mixing energy sufficient to impregnate the weighting agent into biological floes suspended in a mixed liquor or the settled sludge to form weighted biological floes.
  • the weighted biological floes in tank 28 are then sent back to biological reactor 12 by line 37.
  • the treated secondary effluent 50 exits reactor 12 by line 51.
  • Fig. 3 shows a microscopic view of one example of biological floes 23 impregnated with virgin weighting agent 33 and recycled weighting agent 38 to form weighted biological floe 25.
  • weighted biological floes generated by weighting agent impregnation subsystem 26 have a greater specific gravity than non-impregnated biological floes, they settle faster than non-impregnated biological floes.
  • the time needed to separate weighted biological floes from the mixed liquor of system 10 is reduced when compared to a conventional activated sludge wastewater treatment system or SBR system.
  • the weighted sludge blanket of an anaerobic treatment system is also more compact and dense and therefore can handle higher flow rates and is not as diffuse. The result is system 10 can substantially increase the capacity of such wastewater systems while providing a high quality treated effluent.
  • weighting agent impregnation subsystem 26' may be configured as venturi
  • mixer/eductor 27 having nozzle 31 and funnel 45 which receives virgin weighting agent 33, e.g., from tank 34 by line 36, and/or recycled weighting agent 38 from separator 78.
  • Weighting agent impregnation subsystem 26' may also include pneumatic feeder subsystem 110, similar as discussed above with reference to Fig. 2 for controlling the delivery rate of weighting agent 33 to funnel 45, Fig. 4.
  • Venturi mixer/eductor 27 preferably receives mixed liquor by line 32 or settled sludge by line 77, as shown in Fig. 1,
  • the velocity of mixed liquor in line 32 or the settled sludge in line 77 is increased through nozzle 31.
  • Virgin weighting agent 33 and/or recycled weighting agent 38 in funnel 45 enters nozzle 31 by line 39 and travels downstream to line 37.
  • the widening of line 37 at 41 induces intimate mixing and entrainment, as shown at 43.
  • This impregnates the virgin and/or recycled weighting agent into the biological floes to form weighted biological floes.
  • the weighted biological floes are then returned to biological reactor 12 by line 37, as shown in Fig. 1.
  • 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 when impregnated therein.
  • the majority of the weighting agent has a particle size less than about 100 ⁇ . In other examples, the majority of the weighting agent particles have a size less than about 40 um or less than about 20 urn.
  • System 10, Fig. 1 also includes weighting agent recovery subsystem 74 which receives settled sludge from biological reactor 12 by line 76.
  • Weighting agent recovery subsystem 74 preferably includes separator subsystem 78 which recovers the weighting agent from the weighted biological floes in the settled sludge in line 76 and reintroduces (recycles) weighting agent 38 to weighting agent impregnation subsystem 26, 26', Figs. 1 and 4.
  • separator subsystem 78 may be configured as shear mill 112, Fig. 5A, which shears the sludge in line 76 to separate the weighting agent from the weighted biological floes.
  • Shear mill 112 ideally includes rotor 80 and stator 82. In operation, the settled sludge in line 76 enters shear mill 112 and flows in the direction of arrows 180 and enters rotor 80 and then stator 82.
  • Shear mill 112 is designed such that there is a close tolerance between rotor 80, Fig. 5B and stator 82, as shown at 83.
  • Rotor 80 is preferably driven at high speeds, e.g., greater than about 1,000 r.p.m.
  • rotor 80, Figs. 5A-5C, and/or stator 82 includes slots which function as a centrifugal pump to draw the settled sludge from above and below rotor 80 and stator 82, as shown by paths 182, 183, Fig.
  • rotor 80 may include slots 186 and stator 82 may include slots 188. Slots 186 in rotor 80 and/or slots 188 in stator 82 are preferably optimized to increase shear energy to efficiently separate the weighting agent from the weighted biological floes.
  • the shear developed by rotor 80 and stator 82 depends on the width of slots 186 and 188, the tolerance between rotor 80 and stator 82, and the rotor tip speed. In one example, rotor 80 is driven at about 9,000 ft/min. The result is shear mill 112 provides a shearing effect which effectively and efficiently separates the weighting agent from the weighted biological floes to facilitate recovery of the weighting agent.
  • separator subsystem 78 may be configured as ultrasonic separator 116.
  • Ultrasonic separator 116 typically includes one or more ultrasonic transducers, e.g., ultrasonic transducer 262, 264, 266, 268, and/or 270, available from Hielscher Ultrasonics GmbH, Stuttgart, Germany, which generates fluctuations of pressure and cavitation in the settled sludge in line 76. This results in microturbulences that produce a shearing effect to create a mixture of weighting agent and obliterated floes to effectively separate the weighting agent from the weighted biological floes in the settled sludge. The resulting mixture of weighting agent and obliterated floes exits ultrasonic separator 116 by line 79.
  • separator subsystem 78 may be configured as centrifugal separator 118.
  • Centrifugal separator 114 typically includes cylindrical section 302 located at the top of hydrocyclone 300 and conical base 304 located below section 302. The settled sludge in line 76 is fed tangentially into cylindrical section 302 via port 303. Smaller exit port 306 (underflow or reject port) is located at the bottom of conical section 304 and larger exit port 308 (overflow or accept port) is located at the top of cylindrical section 302.
  • the centrifugal force created by the tangential feed of the sludge by port 303 causes the denser weighting agent to be separated from the weighted biological floes in the settled sludge.
  • the separated weighting agent is expelled against wall 308 of conical section 304 and exits at port 306. This effectively separates the weighting agent from the weighted biological floes.
  • the recovered weighting agent 38 exits via port 306 and may be deposited to weighting agent impregnation system 26, 26', Figs. 1 and 4.
  • the less dense biological fiocs remain in the sludge and exit via port 308 through tube 310 extending slightly into the body of the center of centrifugal separator 118.
  • separator subsystem 78 may be configured as a shear mill, an ultrasonic separator, or a centrifugal separator, this is not a necessary limitation of this invention. In other designs, separator subsystem 78 may be configured as a tubular bowl, a chamber bowl, an imperforate basket, a disk stack separator, and the like, as known by those skilled in the art.
  • wet drum magnetic separator 81 Fig. 8, or centrifugal separator 118, Fig. 7, may be used to recover the weighting agent therefrom. Further details of the design and operation of wet drum magnetic separator 81 are disclosed in co-pending application U.S. Publication No. 2008/0164184, entitled “Fluidic Sealing System For a Wet Drum Magnetic Separator", and U.S. Publication No. 2008/016483, entitled “Collection System for a Rotating Wet Drum Magnetic Separator", both incorporated by reference herein.
  • separator subsystem 78, Fig. 6 is configured as an ultrasonic separator 116 to create the mixture of weighting agent and obliterated biological floes
  • wet drum magnetic separator 81, Fig. 8, or centrifugal separator 118, Fig. 7 may be used to recover the weighting agent therefrom.
  • System 10, Fig. 1 may also include wasting subsystem 83 which wastes the remaining settled sludge of separator subsystem 78 to control the population of the microorganisms in mixed liquor 24 in biological reactor 12.
  • system 10' in another embodiment, includes biological reactor 12, weighting impregnation subsystem 26 and/or weighting impregnation subsystem 26', Fig. 4, and weighting agent recovery subsystem 74 with separator subsystem 78, which function similar as discussed above with reference to Figs. 1-8.
  • system 10' also includes flocculant injection subsystem 42, typically located downstream from biological reactor 12, although flocculant injection subsystem 42 may be at any desired location in system 10.
  • flocculant injection subsystem introduces flocculant 44 into mixed liquor 24 by line 135.
  • 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.
  • System 10' also preferably includes secondary clarifier 46 which may be used to separate and collect the weighted biological floes from the mixed liquor.
  • secondary clarifier 46 may be used to separate and collect the weighted biological floes from the mixed liquor.
  • a rake or siphon (draft tube) subsystem 67 is used to remove settled sludge 54 at bottom 69 of clarifier 46. Because the weighted biological floes have a greater specific gravity than non-impregnated biological floes, they settle faster in secondary clarifier 46 than non-impregnated biological floes utilized in a typical system for an activated sludge process. Thus, secondary clarifier 46 effectively and efficiently separates the weighted biological floes from the mixed liquor to provide secondary effluent 50'.
  • System 10' may also include return activated sludge subsystem 70 which recycles the majority of settled sludge 54 in secondary clarifier 42 to biological reactor 12 by line 72 using pump 47 and/or sends the settled sludge 54 to weighting impregnation subsystem 26, 26' via line 119.
  • return activated sludge subsystem 70 recycles the majority of settled sludge 54 in secondary clarifier 42 to biological reactor 12 by line 72 using pump 47 and/or sends the settled sludge 54 to weighting impregnation subsystem 26, 26' via line 119.
  • the capacity of system 10', Figs. 1-9, to process wastewater 14 may be increased by increasing the concentration of the MLSS in biological reactor 12 by reducing the amount of settled sludge wasted by wasting subsystem 83.
  • the amount of settled sludge wasted by wasting subsystem 83 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 biological reactor 12 by line 20.
  • Coagulant 88 maybe added to biological reactor 12, as shown at 90 or to weighting agent impregnation tank 28, as shown at 94, for removing phosphorus and other contaminants 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, Fig. 9, as shown at 92, to remove phosphorus by
  • coagulant 88 may be added to weighting agent impregnation tank 28, Figs. 1 and 9, as shown at 94, or to venture mixer/eductor 27, Fig. 4, as shown at 103, 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 and/or settled sludge may be 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 may include biological reactor 12', e.g., an aeration tank, having anoxic zone 87 with mixer 91 configured to remove nitrogen from mixed liquor 24.
  • recycle line 100 connected to line 135 recycles mixed liquor 24 to anoxic zone 87, as shown by arrows 101.
  • Biological reactor 12' may also include anaerobic zone 93 with mixer 95 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.
  • system 10 includes weighting agent impregnation subsystem 26, 26' which receives mixed liquor from biological reactor 12 and then dispenses the weighted biological floes back into the biological reactor, this is not a necessary limitation of this invention.
  • weighting agent impregnation subsystem 26, 26' may receive mixed liquor from biological reactor 12 and dispense the weighted biological floes between biological reactor and the secondary clarifier.
  • system 10"', Fig. 11, where like parts have been given like numbers may include weighting impregnation subsystem 26, 26', similar as discussed above with reference to Figs. 1 and 4, which dispenses the weighted biological floes to line 137 between biological reactor 12 and clarifier 46.
  • weighting agent impregnation subsystem 26, 26' may be located between the biological reactor and the secondary clarifier.
  • system 10 Fig. 12, where like parts have been given like numbers, includes weighting agent impregnation subsystem 26, 26' located between biological reactor 12 and 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 10 IV may not need return activated sludge subsystem 70, a shown in Fig. 9, 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 a wastewater treatment process includes receiving a flow of wastewater in at last one biological reactor, step 200, Fig. 13.
  • Biological floes are then formed in the biological reactor, step 202.
  • Weighting agent is then impregnated into the biological floes to form weighted biological floes, step 204.
  • the weighting agent is then recovered and reintroduced to step 204, step 206.
  • steps 200-206 are discussed in detail above with reference to Figs. 1-9.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Activated Sludge Processes (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
PCT/US2010/002443 2009-09-08 2010-09-07 System and method for enhancing a wastewater treatment process WO2011031305A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
SG2012015012A SG178962A1 (en) 2009-09-08 2010-09-07 System and method for enhancing a wastewater treatment process
EP10815736.3A EP2475623B8 (en) 2009-09-08 2010-09-07 System and method for wastewater treatment
CN2010800398536A CN102574714A (zh) 2009-09-08 2010-09-07 用于增强废水处理过程的系统和方法
BR112012005131A BR112012005131A2 (pt) 2009-09-08 2010-09-07 sistema e método para intensificar um processo de tratamento de águas residuais.
IN1995DEN2012 IN2012DN01995A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2009-09-08 2010-09-07
AU2010293066A AU2010293066C1 (en) 2009-09-08 2010-09-07 System and method for enhancing a wastewater treatment process
CA2773310A CA2773310C (en) 2009-09-08 2010-09-07 System and method for enhancing a wastewater treatment process
MX2012002839A MX2012002839A (es) 2009-09-08 2010-09-07 Sistema y metodo para mejorar un proceso de tratamiento de aguas residuales.
ZA2012/01688A ZA201201688B (en) 2009-09-08 2012-03-07 System and method for enhancing a wastewater treatment process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/584,545 2009-09-08
US12/584,545 US8470172B2 (en) 2007-01-09 2009-09-08 System for enhancing a wastewater treatment process

Publications (1)

Publication Number Publication Date
WO2011031305A1 true WO2011031305A1 (en) 2011-03-17

Family

ID=43732730

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/002443 WO2011031305A1 (en) 2009-09-08 2010-09-07 System and method for enhancing a wastewater treatment process

Country Status (11)

Country Link
US (4) US8470172B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP2475623B8 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CN (2) CN106242041B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU2010293066C1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR112012005131A2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA2773310C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IN (1) IN2012DN01995A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
MX (1) MX2012002839A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SG (1) SG178962A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO2011031305A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA201201688B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2563729A4 (en) * 2010-04-27 2015-05-27 Evoqua Water Technologies Llc SEQUENCING BATCH REACTOR WITH PRE-SWITCHING AND PROCESSING FOR WASTEWATER PROCESSING
EP2563728A4 (en) * 2010-04-27 2015-05-27 Evoqua Water Technologies Llc ANAEROBIC SYSTEM WITH PRE-SWITCHING AND METHOD FOR TREATMENT OF WASTEWATER
US9651523B2 (en) 2012-09-26 2017-05-16 Evoqua Water Technologies Llc System for measuring the concentration of magnetic ballast in a slurry
GB2575372A (en) * 2019-08-30 2020-01-08 Lee Ashwell Sean Water treatment apparatus and method
US10919792B2 (en) 2012-06-11 2021-02-16 Evoqua Water Technologies Llc Treatment using fixed film processes and ballasted settling
KR20210058002A (ko) * 2019-11-13 2021-05-24 주식회사 포스코건설 분말 산화철을 이용한 수처리장치
GB2590304A (en) * 2019-08-30 2021-06-23 Lee Ashwell Sean Water treatment apparatus and method

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US8470172B2 (en) 2007-01-09 2013-06-25 Siemens Industry, Inc. System for enhancing a wastewater treatment process
EA025602B1 (ru) 2009-07-08 2017-01-30 Сауди Арабиан Ойл Компани Система и способ обработки сточных вод
CA2764112C (en) * 2009-07-08 2018-01-16 Saudi Arabian Oil Company Low concentration wastewater treatment system and process
NL1039052C2 (en) * 2011-09-19 2013-03-21 Stichting Wetsus Ct Excellence Sustainable Water Technology Device and method for a heterogeneous waste water treatment reactor.
ES2713429T3 (es) * 2012-10-22 2019-05-21 Evoqua Water Tech Llc Sistemas de desbordamiento de agua residuales
JP6139563B2 (ja) * 2012-11-28 2017-05-31 独立行政法人石油天然ガス・金属鉱物資源機構 分離装置及び分離方法
EP2988844A2 (en) * 2013-04-26 2016-03-02 Basf Se Concentration of suspensions
CA2934520C (en) * 2013-12-20 2022-10-04 Dsm Ip Assets B.V. Process for extracting lipids for use in production of biofuels
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
FR3036698B1 (fr) * 2015-05-29 2021-04-09 Orege Procede et dispositif d'epuration d'eaux domestiques ou industrielles.
SE538885C2 (sv) * 2015-07-17 2017-01-24 Daniel Andersson Med Firma Da Innovation Anordning och förfarande vid rening av vatten
WO2017214003A1 (en) * 2016-06-06 2017-12-14 Evoqua Water Technologies Llc Removing heavy metals in a ballasted process
WO2017214216A1 (en) * 2016-06-07 2017-12-14 Evoqua Water Technologies Llc Ballasted solids treatment system and method
CN105999780B (zh) * 2016-07-29 2018-03-20 饶平县施蓝水处理科技有限公司 一种水处理分离装置
CN105964018B (zh) * 2016-07-29 2018-03-20 饶平县施蓝水处理科技有限公司 一种水处理分离系统
CN111032177B (zh) * 2017-08-18 2022-07-08 懿华水处理技术有限责任公司 使用压载澄清处理包含高浓度的固体的液体流
CA3074480A1 (en) * 2017-09-01 2019-03-07 Carollo Engineers, Inc. Ballasted activated sludge treatment combined with high-rate liquids/solids separation systems
JP6670457B2 (ja) * 2018-03-08 2020-03-25 日立金属株式会社 スラリー貯留撹拌装置
CN108815892A (zh) * 2018-05-22 2018-11-16 上海市政工程设计研究总院（集团）有限公司 一种用于沉砂池的水力旋流扩散装置的安装及使用方法
CN109592849A (zh) * 2018-12-28 2019-04-09 新疆环境工程技术有限责任公司 一种寒冷地区一体化高效改良型sbr集成处理工艺
CN110590078A (zh) * 2019-10-15 2019-12-20 青岛思普润水处理股份有限公司 一种铁促进磁加载厌氧反应系统
CN110606627A (zh) * 2019-10-15 2019-12-24 青岛思普润水处理股份有限公司 一种铁促进磁加载厌/缺氧活性污泥法与生物膜法耦合处理系统
EP4034506A4 (en) * 2019-11-08 2023-07-26 Evoqua Water Technologies LLC ACCELERATED DEPOSITION OF FLAKES FOLLOWING ELECTROCOAGULATION/AN ELECTROCHEMICAL PROCESS USING FLOCATION
CN111018092A (zh) * 2019-11-28 2020-04-17 国合恒新环保江苏有限公司 一种加载磁粉的活性污泥处理设备
CN113666507B (zh) * 2021-08-06 2022-11-25 同济大学 粉末载体富集世代周期长的脱氮功能菌分离回收装置及方法
AU2023213740A1 (en) 2022-01-27 2024-05-02 Evoqua Water Technologies Llc Use of flotation for separation and thickening of ballasted sludge

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5616241A (en) * 1993-04-12 1997-04-01 Khudenko; Boris M. Treatment of wastewater and sludges
US6210587B1 (en) 1997-01-27 2001-04-03 Degremont Method for the physico-chemical treatment of effluents, in particular of surface water for consumption
US20020148780A1 (en) * 2001-04-13 2002-10-17 Tiemeyer Eric B. Method of enhancing biological activated sludge treatment of waste water, and a fuel product resulting therefrom
US20030082084A1 (en) 2001-05-30 2003-05-01 Cort Steven L. Methods for removing heavy metals from water using chemical precipitation and field separation methods
US20070119776A1 (en) * 2005-11-01 2007-05-31 Hitachi Plant Technologies, Ltd. Entrapping immobilization pellets and process for producing the same
WO2008039711A2 (en) 2006-09-25 2008-04-03 Smith William G Method and apparatus for treatment of wastewater
US20080203015A1 (en) 2007-01-09 2008-08-28 Marston Peter G System and method for enhancing an activated sludge process

Family Cites Families (320)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US438579A (en) * 1890-10-14 And samuel g
US531183A (en) 1894-12-18 harris
US1310461A (en) 1919-07-22 Floatable concrete construction
US653010A (en) * 1899-12-20 1900-07-03 Charles Herschel Koyl Apparatus for purifying water.
US728062A (en) 1902-11-11 1903-05-12 John Wilson Recreation device.
US1064807A (en) 1912-05-18 1913-06-17 Rodger Ballast Car Co Ballast-car.
US1383287A (en) 1920-06-28 1921-07-05 Entpr Railway Equipment Co Convertible gondola ballast-car
US1401288A (en) 1921-10-05 1921-12-27 Whitehead Torpedo Works Weymou Automobile torpedo
US1948080A (en) 1930-05-10 1934-02-20 Percy H Thomas Magnetic ore separator for wet and other operations
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
US2326575A (en) 1939-04-10 1943-08-10 Stearns Magnetic Mfg Co Magnetic separator
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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1945-10-06
US2564515A (en) 1946-09-11 1951-08-14 Vogel Walter Magnetic separator for obtaining magnetic particles from liquids
US2597561A (en) 1949-10-15 1952-05-20 Dings Magnetic Separator Co Magnetic separator
US2713028A (en) * 1951-04-20 1955-07-12 Jenks Harry Neville Sewage treatment
US2758715A (en) 1953-08-20 1956-08-14 Barnes Drill Co Magnet separator
US2825464A (en) * 1954-01-22 1958-03-04 Packard Water Conditioners Inc Water treatment device
US2945590A (en) 1955-10-07 1960-07-19 Indiana General Corp Adjustable permanent magnetic separator
US3066095A (en) 1959-09-30 1962-11-27 Hagan Chemicals & Controls Inc Water purification agents and method of using same
US3080264A (en) 1960-02-12 1963-03-05 Zimmie Method of removing silt from tanks
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 (fr) 1964-08-04 1965-09-24 Nikex Nehezipari Kulkere Procédé de clarification et épuration d'eaux de surface et d'eaux industrielles contenant des matières en suspension
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
US3622461A (en) 1968-05-06 1971-11-23 Bayer Ag Process for the extraction of l-asparaginase
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
US3627678A (en) 1969-09-03 1971-12-14 Magnetic Eng Ass Inc Magnetic separator and magnetic separation method
US3690454A (en) 1969-11-18 1972-09-12 Georgy Alexandrovich Bekhtle Method and apparatus for magnetic concentration with ferromagnetic soft iron bodies
US3950319A (en) 1970-01-29 1976-04-13 Farbenfabriken Bayer Aktiengesellschaft Amylase inhibitor from wheat gluten using alcohol
US3693795A (en) 1970-05-22 1972-09-26 Marcona Corp Method and apparatus for loading slurries into vessels and eliminating the suspending liquid
US3676337A (en) * 1970-07-09 1972-07-11 Massachusetts Inst Technology Process for magnetic separation
CH529587A (de) * 1970-10-22 1972-10-31 Von Roll Ag Vorrichtung zur Herstellung von Blöcken
CA978501A (en) 1971-07-20 1975-11-25 Haruo Manabe Rotating drum magnetic separator
DE7138603U (de) * 1971-10-12 1972-06-15 Passavant Werke Vorrichtung zur mechanisch-chemischen Wasseraufbereitung und Abwasserbehandlung
BE791202A (fr) * 1971-11-12 1973-03-01 Gustavsbergs Fabriker Ab Separateur lamellaire
US3819589A (en) 1972-02-17 1974-06-25 Petrolite Corp Polymeric quaternary ammonium betaines
US3929635A (en) 1972-02-17 1975-12-30 Petrolite Corp Use of polymeric quaternary ammonium betaines as water clarifiers
US3929632A (en) 1972-02-17 1975-12-30 Petrolite Corp Use of polymeric quaternary ammonium betaines as oil-in-water demulsifiers
US3920543A (en) 1973-03-05 1975-11-18 Magnetic Eng Ass Inc Moving matrix magnetic separator
US3983033A (en) * 1973-03-26 1976-09-28 Massachusetts Institute Of Technology Process for removing dissolved phosphorus from water magnetically
US3887457A (en) 1973-05-21 1975-06-03 Magnetic Eng Ass Inc Magnetic separation method
US3951807A (en) * 1973-09-20 1976-04-20 Sanderson Charles H Water conditioning apparatus
US4024040A (en) 1974-02-26 1977-05-17 Hercules Incorporated Polymerization of unsaturated monomers with radiation in the presence of salts
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
US4046681A (en) 1975-07-10 1977-09-06 Sala Magnetics, Inc. Multiple matrix assembly and matrix unit for magnetic separator with simplified sealing
US4033864A (en) 1975-07-16 1977-07-05 Sala Magnetics, Inc. Inlet and outlet apparatus for multiple matrix assembly for magnetic separator and modular matrix and matrix unit
US4025432A (en) 1975-07-25 1977-05-24 Sala Magnetics, Inc. Flow control unit for magnetic matrix
US4066991A (en) 1975-11-20 1978-01-03 Sala Magnetics, Inc. Pressure support for limiting strain in a superconducting winding
US4089779A (en) * 1975-11-24 1978-05-16 Georgia-Pacific Corporation Clarification process
US4176042A (en) 1976-03-25 1979-11-27 Boliden Aktiebolag Method of treating shales
US4193866A (en) * 1976-09-27 1980-03-18 General Electric Company Ferrite flocculating system
AT346252B (de) * 1976-11-23 1978-11-10 Mach Guido Verfahren zum entsalzen von wasser und vorrichtung zum durchfuehren des verfahrens
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
DE2831384A1 (de) 1978-07-17 1980-01-31 Weiss Geb Kg Filterhilfsmittel zur aufbereitung von suspensionen, insbesondere von kommunal-, industrie- und sonstigen schlaemmen fuer die nachfolgende entwaesserung
US4190539A (en) * 1978-08-16 1980-02-26 Ferdinand Besik Apparatus for on-site renovation of sanitary waters
US4204948A (en) 1978-12-18 1980-05-27 Allis-Chalmers Corporation Self-purging seal
US4320012A (en) * 1979-01-22 1982-03-16 Palm Gordon F Neutralization of phosphoric acid waste waters
US4341657A (en) 1979-04-23 1982-07-27 Petrolite Corporation Use of quaternized derivatives of polymerized pyridines and quinolines as corrosion inhibitors
US4358382A (en) 1979-04-23 1982-11-09 Petrolite Corporation Use of quaternized derivatives of polymerized pyridines and quinolines as water clarifiers
US4297484A (en) 1979-04-23 1981-10-27 Petrolite Corporation Quaternized derivatives of polymerized pyridines and quinolines
US4339347A (en) 1979-04-23 1982-07-13 Petrolite Corporation Use of quaternized derivatives of polymerized pyridines and quinolines as demulsifiers
US4522643A (en) 1979-04-23 1985-06-11 Petrolite Corporation Use of quaternized derivatives of polymerized pyridines and quinolines as microbiocides
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 (fr) * 1979-07-13 1981-01-30 Nippon Kokan Kk Agent traitant a base de scorie et son application a l'elimination des metaux lourds dissous
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
US4343730A (en) 1981-03-09 1982-08-10 Petrolite Corporation Water-in-oil emulsions of polymers of quaternary ammonium compounds of the acrylamido type
US4454047A (en) 1981-03-09 1984-06-12 Petrolite Corporation Process of treating aqueous systems
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
US4359382A (en) 1981-05-15 1982-11-16 Magnetics International, Inc. Magnetic structure for a magnetic separator
US4465597B2 (en) * 1981-08-10 1997-07-01 Tetra Tech Treatment of industrial wastewaters
JPS5852718B2 (ja) * 1981-12-01 1983-11-24 清進産業株式会社 廃水処理における懸濁物の分離方法と装置
JPS58133804A (ja) 1982-02-01 1983-08-09 ユニオン・カ−バイド・コ−ポレ−シヨン 透析膜を横切つてのアルミニウム移行の抑制
US4563286A (en) 1984-04-12 1986-01-07 Johnson Dennis E J System of ionized oxygen allotrope gas water purification and method and apparatus therefor
US4655933A (en) 1982-04-01 1987-04-07 Johnson Dennis E J System of ionized oxygen allotrope gas water purification and method and apparatus therefor
US4482459A (en) 1983-04-27 1984-11-13 Newpark Waste Treatment Systems Inc. Continuous process for the reclamation of waste drilling fluids
FR2553082B1 (fr) * 1983-10-07 1987-08-28 Degremont Appareil de traitement des eaux par precipitation, separation, epaississement et recirculation des boues formees
SU1136839A1 (ru) 1983-11-09 1985-01-30 Государственный проектно-конструкторский институт "Гипромашуглеобогащение" Магнитный сепаратор
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
US5019274A (en) 1984-08-30 1991-05-28 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US5013451A (en) 1984-08-30 1991-05-07 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US5026483A (en) 1984-08-30 1991-06-25 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US5089619A (en) 1984-08-30 1992-02-18 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US4956099A (en) 1984-08-30 1990-09-11 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US5089227A (en) 1984-08-30 1992-02-18 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US4864075A (en) 1984-08-30 1989-09-05 Petrolite Corporation Dithiocarbamates for treating hydrocarbon recovery operations and industrial waters
US4588508A (en) 1984-11-13 1986-05-13 Nalco Cehmical Company Bimodal cationics for water clarification
US4699951A (en) 1984-11-13 1987-10-13 Nalco Chemical Company Bimodal cationics for water clarification
US4765908A (en) * 1985-02-04 1988-08-23 Barbara Monick Process and composition for removing contaminants from wastewater
DE3526185A1 (de) 1985-07-23 1987-02-05 Bayer Ag Verfahren zur herstellung fuellstoffhaltiger, anionisch modifizierter polyurethan(harnstoff)-massen, entsprechende polyurethan(harnstoff)-massen und ihre verwendung
DE3526183A1 (de) * 1985-07-23 1987-02-05 Bayer Ag Verfahren zur verbesserten trennung der klaerfluessigkeit von der biomasse bei der biologischen abwasserreinigung
US4686035A (en) 1985-07-24 1987-08-11 Barnes Drill Co. Cylindrical drum magnetic separator
US4689154A (en) * 1985-11-15 1987-08-25 Occidental Chemical Corporation Process for removing phosphorus from industrial waste water
US4752401A (en) 1986-02-20 1988-06-21 Safe Water Systems International, Inc. Water treatment system for swimming pools and potable water
JPS62228870A (ja) * 1986-03-28 1987-10-07 新日本製鐵株式会社 流動層予備還元炉の炉外循環装置
FR2600323B1 (fr) 1986-06-18 1991-02-15 Omnium Traitement Valorisa Dispositif de transfert de gaz et flottation dans le traitement d'eau a epurer
EP0323970B1 (en) * 1986-09-16 1993-04-07 Commonwealth Scientific And Industrial Research Organisation Sewage treatment
US4851123A (en) 1986-11-20 1989-07-25 Tetra Resources, Inc. Separation process for treatment of oily sludge
US4765900A (en) * 1987-02-13 1988-08-23 Vertech Treatment Systems, Inc. Process for the treatment of waste
US5089120A (en) 1987-07-20 1992-02-18 Eberhardt Thomas E Treatment vessel for bodies of water with laterally adjustable pontoons
EP0314436B1 (en) 1987-10-28 1993-12-29 Canon Kabushiki Kaisha A developing apparatus
SE459925B (sv) 1987-12-23 1989-08-21 Boliden Ab Avskiljning av harts ur massaavlutar
US4874508A (en) 1988-01-19 1989-10-17 Magnetics North, Inc. Magnetic separator
US4827890A (en) 1988-02-01 1989-05-09 Eaton Corporation Supercharger system noise reduction
US4872993A (en) * 1988-02-24 1989-10-10 Harrison George C Waste treatment
FR2627704B1 (fr) * 1988-02-25 1991-12-13 Ile France Syndicat Eaux Procede et installation de traitement d'eau par decantation faisant intervenir du sable fin
US5369072A (en) * 1988-05-10 1994-11-29 University Of Washington Granular media for removing contaminants from water and methods for making the same
US4921597A (en) 1988-07-15 1990-05-01 Cli International Enterprises, Inc. Magnetic separators
US5023012A (en) * 1988-10-04 1991-06-11 Pieter Walter William Buchan Purification of water
US4938876A (en) 1989-03-02 1990-07-03 Ohsol Ernest O Method for separating oil and water emulsions
US4944278A (en) 1989-04-14 1990-07-31 Eaton Corporation Torsion damping mechanism for a supercharger
US4944279A (en) 1989-04-14 1990-07-31 Eaton Corporation Supercharger torsion damping mechanism with friction damping
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
US5055194A (en) 1989-07-28 1991-10-08 University Of Pennsylvania Support for high performance liquid chromatography in a magnetically stabilized fluidized bed
US5069783A (en) 1990-05-16 1991-12-03 Int'l Environmental Systems, Inc. Liquid treatment apparatus
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
JPH04136965A (ja) 1990-09-28 1992-05-11 Canon Inc 現像装置
ATE137727T1 (de) 1991-02-27 1996-05-15 Interlicense Den Haag Bv Verfahren zur getrennten behandlung und entsorgung von gemengen aus festen und flüssigen, organischen abfallstoffen
US5122279A (en) 1991-04-08 1992-06-16 Romar Technologies Inc. Ferrous dithionite process and compositions for removing dissolved heavy metals from water
US5462670A (en) 1991-04-08 1995-10-31 Romar Technologies, Inc. Process for removing oils and greases from aqueous solution
US5266200A (en) * 1991-04-17 1993-11-30 Reid John H Sequence continuous reaction in complete mix activated sludge systems
US5112499A (en) 1991-05-22 1992-05-12 Freeport-Mcmoran Resource Partners, Limited Partnership Process for treating pond water
US5234603A (en) * 1991-06-04 1993-08-10 Analytical Development Corporation Methods employing a zirconium salt for use in wastewater treatment
SE506464C2 (sv) 1991-06-26 1997-12-22 Svedala Pumps & Process Ab Förfarande och anordning för separation av pulp innehållande magnetiska beståndsdelar i en våtmagnetisk lågdensitetsseparator av medströmstyp
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
DE4140544A1 (de) 1991-12-09 1993-06-17 Henkel Kgaa Verbessertes verfahren zur entfernung von schwermetallrestgehalten und gegebenenfalls vorliegenden organischen ballaststoffen aus waessrigen phasen
US5310642A (en) 1993-01-22 1994-05-10 Eastman Kodak Company DIR couplers with hydrolyzable inhibitors for use in high pH processed films
US5595666A (en) 1993-05-07 1997-01-21 The United States Of America As Represented By The United States Department Of Energy Removal of radioactive materials and heavy metals from water using magnetic resin
US5395527A (en) * 1993-07-01 1995-03-07 Eco Equipement Fep Inc. Process and apparatus for treating wastewater in a dynamic, bio sequenced manner
US5383539A (en) 1993-10-04 1995-01-24 Eaton Corporation Brake squeal dampener ring
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
JP2960298B2 (ja) 1994-03-25 1999-10-06 キヤノン株式会社 現像装置
FR2719235B1 (fr) 1994-05-02 1996-07-19 Omnium Traitement Valorisa Procédé et installation de clarification de boues biologiques par décantation.
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 (fr) * 1994-05-02 1999-08-13 Omnium Traitement Valorisa Procédé et installation de traitement d'un écoulement brut par décantation simple après lestage au sable fin.
US5540836A (en) 1994-06-16 1996-07-30 Coyne; Thomas J. Wastewater treatment system and method
US5545330A (en) 1994-12-01 1996-08-13 Amerada Hess Corporation Water treatment system
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
US5693461A (en) 1995-03-21 1997-12-02 Eastman Kodak Company Mixed packet color photographic system
FR2735142A1 (fr) 1995-06-12 1996-12-13 Kodak Pathe Composition pour couche antistatique et film comprenant cette couche
US5779908A (en) * 1995-07-19 1998-07-14 Sorin, Inc. Method and apparatus for waste water treatment
FR2739094B1 (fr) 1995-09-21 1997-12-19 Omnium Traitement Valorisa Procede et installation de dessablage et de decantation physico-chimique d'effluents urbains ou industriels
KR100197477B1 (ko) 1995-11-14 1999-06-15 이토가 미찌야 화상형성장치용 현상장치
DE19600647A1 (de) 1996-01-10 1997-07-17 Ktb Kommunale Technologie Bera Verfahren und Anlage zur Verwertung von Kabelmuffen mittels Tieftemperaturtechnik
US5731134A (en) 1996-02-09 1998-03-24 Eastman Kodak Company Gelatin and polymer latex dispersion coating compositions
AUPN859096A0 (en) 1996-03-11 1996-04-04 Archer, Walter James Ballast water de-toxification treatment system for ships
AU1919797A (en) 1996-03-25 1997-10-17 Dietmar J. Berger Wastewater treatment system
AU2540197A (en) 1996-03-25 1997-10-17 Microsep International (Canada) Corporation Water treatment system
FR2751320B1 (fr) 1996-07-18 1998-09-18 Omnium Traitement Valorisa Installation de traitement d'eau a lit fluidise et decantation physico-chimique et procedes pour la mise en oeuvre d'une telle installation
US5840185A (en) 1996-07-23 1998-11-24 Douglass E. Hughes Sports bottle filter cartridge
JP3352329B2 (ja) 1996-07-26 2002-12-03 キヤノン株式会社 現像装置およびこれを備えたプロセスカートリッジ
US5976771A (en) 1996-08-22 1999-11-02 Fuji Photo Film Co., Ltd. Silver halide color light-sensitive material and method of forming color images
US5932096A (en) 1996-09-18 1999-08-03 Hitachi, Ltd. Magnetic purifying apparatus for purifying a fluid
US5800717A (en) * 1996-10-02 1998-09-01 Microsep International Corporation Water and wastewater treatment system with internal recirculation
US6228565B1 (en) 1996-10-28 2001-05-08 Fuji Photo Film Co., Ltd. Silver halide color photographic photosensitive material
US6030761A (en) 1996-12-26 2000-02-29 Fuji Photo Film Co., Ltd. Silver halide photographic light-sensitive material
US5893355A (en) 1996-12-26 1999-04-13 Eaton Corporation Supercharger pulley isolator
US6251576B1 (en) 1997-01-13 2001-06-26 Fuji Photo Film Co., Ltd. Photosensitive composition and color photosensitive materials
EP0961759B1 (fr) 1997-01-27 2001-12-05 Degremont Procede de traitement physico-chimique d'effluents, notamment d'eaux de surface destinees a la consommation
US6576145B2 (en) 1997-02-27 2003-06-10 Continuum Environmental, Llc Method of separating hydrocarbons from mineral substrates
JP3478321B2 (ja) 1997-03-14 2003-12-15 栗田工業株式会社 活性汚泥沈降促進剤、およびそれを用いた排水の活性汚泥処理方法
FR2761959B1 (fr) 1997-04-15 1999-05-21 Oreal Ensemble de conditionnement et d'application d'un produit fluide
JPH10288887A (ja) 1997-04-16 1998-10-27 Canon Inc 現像装置及びプロセスカートリッジ
US6759018B1 (en) 1997-05-16 2004-07-06 Advanced Technology Materials, Inc. Method for point-of-use treatment of effluent gas streams
US5856072A (en) 1997-06-02 1999-01-05 Eastman Kodak Company Photographic element containing 5-carbamoyl resorcinol interlayer scavenger
EP1009721B1 (en) 1997-07-04 2001-12-12 Krüger A/S Method for biological purification of waste water by the activated sludge method
US5925290A (en) * 1997-08-08 1999-07-20 Rhone-Poulenc Inc. Gas-liquid venturi mixer
FR2767521B1 (fr) 1997-08-22 1999-12-03 Omnium Traitement Valorisa Procede et installation pour le traitement des eaux integrant un decanteur et un filtre multi-couches fonctionnant a grandes vitesses
FR2769613A1 (fr) 1997-10-14 1999-04-16 Omnium Traitement Valorisa Procede de traitement par voie physico-chimique des eaux et installation pour la mise en oeuvre d'un tel procede
FR2769614B1 (fr) 1997-10-14 2000-01-28 Omnium Traitement Valorisa Procede de traitement par voie physico-chimique des eaux et installation pour la mise en oeuvre d'un tel procede
JP3618984B2 (ja) 1997-11-11 2005-02-09 キヤノン株式会社 現像装置及びプロセスカートリッジ
US7772455B1 (en) 1997-11-14 2010-08-10 The Procter & Gamble Company Disposable article providing improved management of bodily exudates
US6149014A (en) 1997-12-04 2000-11-21 Eriez Manufacturing Co. Mill magnet separator and method for separating
US6099738A (en) 1997-12-17 2000-08-08 Micromag Corporation Method and system for removing solutes from a fluid using magnetically conditioned coagulation
CA2267690C (en) 1998-04-03 2003-02-18 Joseph Dorica Process for reducing production of biomass during activated sludge treatment of pulp and paper mill effluents
KR100275004B1 (ko) 1998-09-25 2000-12-15 최춘식 고속응집침전형 오폐수처리방법
FR2785899B1 (fr) 1998-11-18 2001-01-19 Omnium Traitement Valorisa Procede de traitement d'eau par flocs lestes integrant un recyclage de materiau granulaire mettant en oeuvre un hydrocyclone correspondant
JP3575312B2 (ja) 1999-02-10 2004-10-13 栗田工業株式会社 有機性排水の処理方法
US6811885B1 (en) 1999-06-06 2004-11-02 Agfa-Gevaert Acid stable aqueous dispersion of metal particles and applications
FR2797866B3 (fr) 1999-08-24 2001-10-05 Jean Pierre Dautais Procedes d'epuration et de resorption combines pour usage en reacteurs sols artificialises
US6472132B1 (en) 1999-09-17 2002-10-29 Fuji Photo Film Co., Ltd. Silver halide photographic light-sensitive material and processing method thereof
DE60042891D1 (de) 1999-10-19 2009-10-15 Program Man Company Abfallbehandlungsverfahren
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
US6783679B1 (en) * 1999-10-19 2004-08-31 Pmc Technologies, Inc. Waste treatment process
FR2801878B1 (fr) 1999-12-03 2002-02-22 Degremont Procede et installation de clarification des liquides et suspensions par floculation lestee et decantation
JP2001170404A (ja) 1999-12-15 2001-06-26 Hitachi Ltd 磁気分離装置
US6432303B1 (en) 2000-03-21 2002-08-13 Warren Howard Chesner Contaminated sediment excavator for subsurface sediment removal
US6613232B2 (en) 2000-03-21 2003-09-02 Warren Howard Chesner Mobile floating water treatment vessel
FR2810898B1 (fr) 2000-06-29 2002-09-27 Amenagement Urbain & Rural Procede et dispositif de traitement des eaux avec lestant injecte en zone tranquilisee
US7476324B2 (en) 2000-07-14 2009-01-13 Ferrate Treatment Technologies, Llc Methods of synthesizing a ferrate oxidant and its use in ballast water
US6383370B1 (en) 2000-09-14 2002-05-07 Infilco Degremont Inc. Apparatus for treating wastewater
FR2815714B1 (fr) 2000-10-20 2003-01-03 Omnium Traitement Valorisa Installation de mesure de la concentration en materiau granulaire dense d'un ecoulement et systeme pour le traitement de l'eau incluant une telle installation
BR0114877B1 (pt) 2000-11-02 2011-12-13 método para tratamento de água ou efluente.
US6406624B1 (en) 2000-11-20 2002-06-18 Devos Jerry J. Flocculation apparatus and apparatus for floating upwardly in a liquid and for moving downwardly in the liquid under the influence of gravity
FR2817253B1 (fr) 2000-11-24 2003-09-05 Omnium Traitement Valorisa Installlation de traitement d'eau par flocs lestes
FR2820733B1 (fr) 2001-02-09 2003-04-11 Vivendi Water Systems Procede et installation d'epaississement des boues issues du traitement d'eau par floculation-decantation a floc leste
FR2820734B1 (fr) 2001-02-09 2003-04-11 Vivendi Water Systems Installation de traitement d'eau par flocs lestes par un materiau granulaire, comprenant des moyens integres de degraissage
FR2822080B1 (fr) 2001-03-15 2004-10-29 Vivendi Water Systems Procede et installation de traitement des eaux par floculation lestee et separation gravitaire a mode de fonctionnement variable
US6740245B2 (en) 2001-03-26 2004-05-25 Enerox Technology Llc Non-chemical water treatment method and apparatus employing ionized air purification technologies
US6923901B2 (en) 2001-03-26 2005-08-02 Marine Environmental Partners, Inc. Non-chemical water treatment method and apparatus employing ionized air purification technologies for marine application
US20030150817A1 (en) 2002-02-11 2003-08-14 Keever Christopher S. Method and apparatus for treating wastewater
US6517714B2 (en) 2001-04-30 2003-02-11 Parkson Corporation Treatment of liquids with ballasted flocculation
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
US6960294B2 (en) * 2001-06-12 2005-11-01 Hydrotreat, Inc. Apparatus for the separation of solids from liquids by dissolved gas floatation
US6875351B2 (en) 2001-06-12 2005-04-05 Hydrotreat, Inc. Methods and apparatus for oil demulsification and separation of oil and suspended solids from produced water
JP3773169B2 (ja) 2001-06-29 2006-05-10 株式会社荏原製作所 有機性汚水の高速生物処理方法及び装置
US6634504B2 (en) 2001-07-12 2003-10-21 Micron Technology, Inc. Method for magnetically separating integrated circuit devices
TWI245744B (en) 2001-12-21 2005-12-21 Ind Tech Res Inst System and method for removing deep sub-micron particles from water
FR2833939B1 (fr) * 2001-12-21 2004-10-29 Omnium Traitement Valorisa Procede de traitement d'eau par floculation lestee et decantation
US20060030913A1 (en) 2002-01-18 2006-02-09 Apsara Medical Corporation System, method and apparatus for evaluating tissue temperature
FR2835250B1 (fr) 2002-01-29 2004-11-05 Ondeo Degremont Procede et dispositif de traitement biologique d'effluents aqueux, en vue de leur epuration
AU2003223165A1 (en) 2002-02-01 2003-09-02 Exportech Company, Inc. Continuous magnetic separator and process
MXPA04008202A (es) 2002-02-25 2004-11-26 Meunier Inc John Detector acustico de obstruccion en un dispostivo de flujo de fluido por vortice.
US6832691B2 (en) 2002-04-19 2004-12-21 Rampage Ventures Inc. Magnetic separation system and method for separating
JP3854897B2 (ja) 2002-05-21 2006-12-06 キヤノン株式会社 現像装置及びプロセスカートリッジ及び画像形成装置
US6706467B2 (en) 2002-05-30 2004-03-16 Eastman Kodak Company Coating fluid for imaging element comprising solubilized collagen gelatin colloidal dispersion
JP4186523B2 (ja) 2002-06-26 2008-11-26 株式会社日立製作所 排水浄化装置および排水浄化システム
AU2003275323A1 (en) 2002-09-30 2004-04-23 Gary A. Tipton Bilge water reclamation system and process
US7704390B2 (en) 2002-11-18 2010-04-27 Ionz Bluewater Solutions, Inc. Wastewater treatment system
US7014763B2 (en) 2003-02-03 2006-03-21 Aqua-Aerobic Systems, Inc. Multiple barrier biological treatment systems
TW200501897A (en) 2003-07-10 2005-01-16 Kung-Sheng Pan Shoes electrostatically embedded with objects
ES2471215T3 (es) 2003-07-24 2014-06-25 Veolia Water Solutions & Technologies Support Procedimiento de tratamiento de aguas residuales ácidas
WO2005035128A2 (en) 2003-10-08 2005-04-21 Clemson University Carbonaceous waste treatment system and method
FR2860735B1 (fr) 2003-10-10 2006-12-22 Degremont Buse de detente d'eau pressurisee pour generer des microbules dans une installation de flottation
JP2005146057A (ja) * 2003-11-12 2005-06-09 Polymatech Co Ltd 高熱伝導性成形体及びその製造方法
FR2863908B1 (fr) 2003-12-22 2006-05-19 Otv Sa Procede et reacteur de traitement par floculation
US7906023B2 (en) 2005-01-25 2011-03-15 Pss Acquisitionco Llc Wastewater treatment method and apparatus
US8012355B2 (en) 2004-01-30 2011-09-06 Pss Acquisitionco Llc Molecular separator
US20060108273A1 (en) 2004-02-06 2006-05-25 Perri Joyce S Ballasted flocculation process and system incorporating an electro-coagulation reactor for treating water or wastewater
US20090065404A1 (en) 2004-02-06 2009-03-12 Paspek Consulting Llc Process for reclaiming multiple domain feedstocks
IL160384A (en) 2004-02-12 2007-10-31 Edward Brook-Levinson Sewage treatment method and system
US7309435B2 (en) 2004-03-02 2007-12-18 Rozich Alan F Biological process for waste treatment and energy production
WO2005087381A1 (ja) 2004-03-11 2005-09-22 The Kansai Electric Power Co., Inc. 磁気分離回収装置
CA2570848A1 (en) 2004-06-15 2006-01-05 Glendon C. Daly Tire sealant
WO2006002054A2 (en) 2004-06-15 2006-01-05 Randy Eugene Condit Hydrogen peroxide based water treatment system and method
FR2872063B1 (fr) 2004-06-29 2009-02-27 Rhodia Cons Spec Ltd Utilisation d'amidon eventuellement modifie et eventuellement insoluble pour l'elimination de substances organiques naturelles dans des liquides
FR2872064B1 (fr) 2004-06-29 2007-11-09 Rhodia Cons Spec Ltd Utilisation de gomme vegetale eventuellement modifiee et eventuellement insoluble pour l'elimination de substances organiques naturelles ou synthetiques dans des liquides
US7494592B2 (en) 2004-07-08 2009-02-24 Franklin David Deskins Process for combining solids thickening and dewatering in one vessel
JP2006033541A (ja) 2004-07-20 2006-02-02 Hitachi Communication Technologies Ltd 移動端末装置、サーバ、および通信システム
US20060175252A1 (en) 2005-02-04 2006-08-10 Upendrakumar K C Two phase anaerobic contact sequencing batch reactor (ACSBR) system for treating wastewater containing simple and complex organic constituents
US7497954B2 (en) 2005-02-07 2009-03-03 M-I L.L.C. Apparatus for separation of water from oil-based drilling fluid and advanced water treatment
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
CN1686862B (zh) * 2005-03-29 2011-08-31 上海市政工程设计研究院 改良型交替式活性污泥法污水处理工艺及其装置
FR2885125B1 (fr) 2005-04-28 2007-11-09 Rhodia Chimie Sa Utilisation de polysaccharides pour eliminer les metaux lourds contenus sous la forme d'anions dans les eaux
US7318477B2 (en) * 2005-05-10 2008-01-15 Akzo Nobel N.V. Method and composition for cleaning a well bore prior to cementing
US20070039894A1 (en) * 2005-08-17 2007-02-22 Cort Steven L Water treatment using magnetic and other field separation technologies
US7481940B2 (en) 2005-08-18 2009-01-27 Newbio E-Systems, Incorporated Biomass treatment of organic waste or water waste
US7407593B2 (en) 2005-09-20 2008-08-05 Frederick Jr William Mcdowell Deodorization of livestock waste using ozone
FR2891540B1 (fr) 2005-09-30 2007-12-28 Otv Sa Procede de traitement d'eaux comprenant une etape de decantation rapide suivie d'une etape de filtration directement sur membranes de micro ou d'ultra-filtration, et dispositif correspondant.
US8454831B2 (en) 2005-10-28 2013-06-04 Veolia Water Solutions & Technologies Support Biological and ballasetd flocculation treatment of wastewater
FR2902418B1 (fr) * 2005-10-28 2008-10-24 Otv Sa Procede et installation pour le traitement des eaux integrant un traitement biologique a bacteries fixees et une floculation-decantation
EP1785400A1 (fr) 2005-11-10 2007-05-16 Halter Hydro Environnement Procédé de lestage de boues activées
FR2893258B1 (fr) 2005-11-14 2008-01-11 Otv Sa Procede de traitement d'eaux comprenant une etape de decantation et une etape de tamisage fin, et dispositif correspondant.
US7695630B2 (en) 2005-11-15 2010-04-13 De Guevara Cesar Ladron Process for conditioning an aqueous solution for efficient colloidal precipitation
FR2894157B1 (fr) 2005-12-06 2008-01-18 Commissariat Energie Atomique Membrane permeable repoussant un ou plusieurs liquides
US8206592B2 (en) 2005-12-15 2012-06-26 Siemens Industry, Inc. Treating acidic water
US7407582B2 (en) 2006-01-13 2008-08-05 Otv Sa S.A. Combination activated sludge—ballasted flocculation process
US7601261B2 (en) 2006-01-31 2009-10-13 Acciona Agua, S.A.U. Sludge flocculator-separator for the physico-chemical treatment of water
FR2897610B1 (fr) 2006-02-20 2008-08-15 Otv Sa Installation et procede de traitement d'eau par floculation decantation a floc leste avec dessablage final des boues.
US7449105B2 (en) 2006-07-19 2008-11-11 Denny Hastings Flp 14 Water filtration and erosion control system
FR2904621B1 (fr) 2006-08-01 2011-04-01 Otv Sa Procede de traitement d'eau par flocation-decantation lestee comprenant une mesure en continu du lest et installation correspondante
US7452468B2 (en) 2006-09-25 2008-11-18 Smith William G Method and apparatus for treatment of wastewater
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
US20080073282A1 (en) * 2006-09-27 2008-03-27 Cort Steven L Device and Methods for Shearing Magnetic Floc in a Water Treatment System
US7691269B2 (en) * 2006-09-27 2010-04-06 Cort Steven L Method and system for retrofitting an existing water treatment system
US7625490B2 (en) * 2006-09-27 2009-12-01 Cort Steven L Use of a magnetic separator to biologically clean water
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
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
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
WO2008039936A2 (en) 2006-09-27 2008-04-03 Cort Steven L Magnetic seeding and separation technology for treating water
US7820053B2 (en) * 2006-09-27 2010-10-26 Cort Steven L Magnetic separation and seeding to improve ballasted clarification of water
US7678278B2 (en) 2006-09-29 2010-03-16 Otv S.A. Sa Method of treating water with an inorganic powder reagent
US7722843B1 (en) 2006-11-24 2010-05-25 Srivats Srinivasachar System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber systems
FR2910822B1 (fr) 2006-12-29 2009-02-27 Otv Sa Procede et installation de traitement d'eau par floculation lestee et decantation
US8470172B2 (en) 2007-01-09 2013-06-25 Siemens Industry, Inc. System for enhancing a wastewater treatment process
US20100213123A1 (en) 2007-01-09 2010-08-26 Marston Peter G Ballasted sequencing batch reactor system and method for treating wastewater
US20110036771A1 (en) 2007-01-09 2011-02-17 Steven Woodard Ballasted anaerobic system and method for treating wastewater
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
EP2101919A4 (en) 2007-01-09 2012-08-22 Siemens Industry Inc IMPROVED COLLECTION SYSTEM FOR WET DRUM MAGNETIC SEPARATOR
US7323108B1 (en) 2007-04-17 2008-01-29 I. Kruger, Inc. Combined biological and ballasted flocculation process for treating wastewater
US7828976B2 (en) 2007-06-22 2010-11-09 I. Kruger, Inc. Method of removing phosphorus from wastewater
BRPI0815254A2 (pt) 2007-08-23 2015-02-03 Dow Global Technologies Inc Processo para reduzir o conteúdo orgânico de uma corrente de salmoura e aparelho para reduzir o contéudo orgânico de uma corrente de salmoura
CN101186410A (zh) * 2007-11-28 2008-05-28 吴江市方霞企业信息咨询有限公司 处理abs污水的方法
FR2925482B1 (fr) 2007-12-20 2010-01-15 Otv Sa Procede de traitement d'eau par oxydation avancee et floculation lestee, et installation de traitement correspondante.
US7820054B2 (en) 2008-01-14 2010-10-26 Denny Hastings Flp 14 Method for dewatering slurry from construction sites
US8353641B2 (en) 2008-02-14 2013-01-15 Soane Energy, Llc Systems and methods for removing finely dispersed particulate matter from a fluid stream
CN101244884A (zh) 2008-03-28 2008-08-20 北京科技大学 一种采用磁性生物载体及磁分离技术的污水处理方法
US8771260B2 (en) 2008-05-30 2014-07-08 Ethicon Endo-Surgery, Inc. Actuating and articulating surgical device
US7686079B2 (en) 2008-08-18 2010-03-30 Hpd, Llc Method for removing silica from evaporator concentrate
US8409200B2 (en) 2008-09-03 2013-04-02 Ethicon Endo-Surgery, Inc. Surgical grasping device
US20100072142A1 (en) 2008-09-19 2010-03-25 Palo Alto Research Center Incorporated Method and system for seeding with mature floc to accelerate aggregation in a water treatment process
US8012582B2 (en) 2008-09-25 2011-09-06 Halliburton Energy Services, Inc. Sintered proppant made with a raw material containing alkaline earth equivalent
US8088284B2 (en) 2008-10-23 2012-01-03 Cambridge Water Technology, Inc. System and method for measuring the concentration of magnetic ballast in a moving slurry
US8157988B2 (en) 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
US7608190B1 (en) 2008-11-14 2009-10-27 N.A. Water Systems, LLC Process for removing barium from water
FR2941225B1 (fr) 2009-01-19 2012-08-31 Otv Sa Dispositif d'enrobage avec un materiau polymere floculant a l'etat liquide de grains de ballast utilises pour le traitement de l'eau par floculation lestee, et installation correspondante.
US7648637B1 (en) 2009-01-29 2010-01-19 Otv S.A. Water treatment method by ballasted flocculation, settling, and prior adsorbent contact
CA2752799A1 (en) 2009-02-27 2010-09-02 Soane Energy, Llc Systems, methods, processes and apparatus for removing finely dispersed particulate matter from a fluid stream
US20100251571A1 (en) 2009-04-07 2010-10-07 Steven Paul Woodard Shoe suspension system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5616241A (en) * 1993-04-12 1997-04-01 Khudenko; Boris M. Treatment of wastewater and sludges
US6210587B1 (en) 1997-01-27 2001-04-03 Degremont Method for the physico-chemical treatment of effluents, in particular of surface water for consumption
US20020148780A1 (en) * 2001-04-13 2002-10-17 Tiemeyer Eric B. Method of enhancing biological activated sludge treatment of waste water, and a fuel product resulting therefrom
US20030082084A1 (en) 2001-05-30 2003-05-01 Cort Steven L. Methods for removing heavy metals from water using chemical precipitation and field separation methods
US20070119776A1 (en) * 2005-11-01 2007-05-31 Hitachi Plant Technologies, Ltd. Entrapping immobilization pellets and process for producing the same
WO2008039711A2 (en) 2006-09-25 2008-04-03 Smith William G Method and apparatus for treatment of wastewater
US20080203015A1 (en) 2007-01-09 2008-08-28 Marston Peter G System and method for enhancing an activated sludge process

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2563729A4 (en) * 2010-04-27 2015-05-27 Evoqua Water Technologies Llc SEQUENCING BATCH REACTOR WITH PRE-SWITCHING AND PROCESSING FOR WASTEWATER PROCESSING
EP2563728A4 (en) * 2010-04-27 2015-05-27 Evoqua Water Technologies Llc ANAEROBIC SYSTEM WITH PRE-SWITCHING AND METHOD FOR TREATMENT OF 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
GB2575372A (en) * 2019-08-30 2020-01-08 Lee Ashwell Sean Water treatment apparatus and method
GB2575372B (en) * 2019-08-30 2021-04-14 Lee Ashwell Sean Water treatment apparatus and method
GB2590304A (en) * 2019-08-30 2021-06-23 Lee Ashwell Sean Water treatment apparatus and method
KR20210058002A (ko) * 2019-11-13 2021-05-24 주식회사 포스코건설 분말 산화철을 이용한 수처리장치
KR102340961B1 (ko) * 2019-11-13 2021-12-17 주식회사 포스코건설 분말 산화철을 이용한 수처리장치

Also Published As

Publication number Publication date
EP2475623B1 (en) 2017-11-15
CA2773310A1 (en) 2011-03-17
US20130256222A1 (en) 2013-10-03
US20100155327A1 (en) 2010-06-24
SG178962A1 (en) 2012-04-27
US20120211416A1 (en) 2012-08-23
CN106242041A (zh) 2016-12-21
US8470172B2 (en) 2013-06-25
AU2010293066B2 (en) 2015-02-12
MX2012002839A (es) 2012-06-12
EP2475623B8 (en) 2017-12-20
AU2010293066A1 (en) 2012-03-29
CA2773310C (en) 2019-04-16
CN106242041B (zh) 2020-04-24
ZA201201688B (en) 2013-08-28
US8702987B2 (en) 2014-04-22
AU2010293066C1 (en) 2016-02-18
US8506800B2 (en) 2013-08-13
EP2475623A4 (en) 2013-05-01
CN102574714A (zh) 2012-07-11
US8673142B2 (en) 2014-03-18
BR112012005131A2 (pt) 2016-05-03
IN2012DN01995A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2015-07-24
US20130299401A1 (en) 2013-11-14
EP2475623A1 (en) 2012-07-18

Similar Documents

Publication Publication Date Title
CA2773310C (en) System and method for enhancing a wastewater treatment process
US8845901B2 (en) Ballasted anaerobic method for treating wastewater
EP2563729B1 (en) Ballasted sequencing batch reactor system and method for treating wastewater
EP2104649B1 (en) System and method for enhancing an activated sludge process
KR101997143B1 (ko) Ss와 svi 측정값을 이용한 가중응집제 실시간 제어 시스템
US20150360989A1 (en) Dispersant Enhanced Ballast Recovery
Colic et al. Advanced pretreatment enables MBBR treatment of high strength candy manufacturing wastewater

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080039853.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10815736

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010293066

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2773310

Country of ref document: CA

Ref document number: 1995/DELNP/2012

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: MX/A/2012/002839

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2010815736

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2010815736

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2010293066

Country of ref document: AU

Date of ref document: 20100907

Kind code of ref document: A

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112012005131

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112012005131

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20120307