Patents Assigned to Waters Technologies Corp.
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Publication number: 20110147308Abstract: A charged porous polymeric membrane comprises a porous polymeric membrane substrate comprising a polymeric membrane material and a first polymer having a first functional group, the first polymer is compatible with the membrane material, and a charged polymer has a second functional group, the charged polymer can react with the first polymer to bond the charged polymer to the first polymer, forming a charged coating on the membrane outer and inner surfaces. The membrane may be a microporous or an ultrafiltration membrane. The membrane may be a hollow fiber, flat sheet, or tubular membrane. Methods of manufacturing the membranes and method of using of the membranes to remove viral particles from contaminated water are further described.Type: ApplicationFiled: December 20, 2010Publication date: June 23, 2011Applicant: Siemens Water Technologies Corp.Inventors: Geoffrey JOHNSTON-HALL, Heinz-Joachim Muller, Dongliang Wang
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Publication number: 20110139715Abstract: A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fibre membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.Type: ApplicationFiled: August 17, 2009Publication date: June 16, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Fufang Zha, Zhiyi Cao
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Publication number: 20110139724Abstract: A composition and method for reducing a concentration of chlorite in water. The composition comprises a mixture of ferrous iron and a polyaluminum chloride. The mixture is contacted with a water containing chlorite.Type: ApplicationFiled: August 28, 2009Publication date: June 16, 2011Applicant: Siemens Water Technologies Corp.Inventor: Glenn W. Holden
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Publication number: 20110139729Abstract: A chlorine based bio-fouling control subsystem is utilized to facilitate shipboard water management systems such as ballast water management that employ filters. The biofouling control system can serve as a subsystem to promote antifouling and reduce the filter clogging due to biofouling, which improves the efficiency and effectiveness of the ballast water treatment management system. An antifouling agent of the biofouling control system breaks up the dense colonies of marine organisms being filtered or treated by the main water management systems.Type: ApplicationFiled: August 18, 2009Publication date: June 16, 2011Applicants: SIEMENS WATER TECHNOLOGIES CORP., SIEMENS AKTIENGESELLSCHAFTInventors: Lars Nupnau, Michael Upjohn, Vadim Zolotarsky
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Publication number: 20110132839Abstract: An integrated process for removing sulfate from water sources, such as pretreated acid mine drainage (AMD). The multivalent cation (MVC) content of a sulfate stream is reduced by strong acid cation (SAC) ion exchange and sulfate is concentrated with a membrane system and separated as precipitate and overflow. Precipitation results from reaction of sulfate with MVC produced by regeneration of SAC with sodium chloride. The overflow is reacted with carbonate to precipitate MVC, generate sodium chloride and give a further overflow stream. This latter stream is concentrated to a level capable of being a regenerant for the SAC and when needed, used to regenerate the SAC and produce MVC for sulfate precipitation. The process minimizes the use of chemicals by treating, reconcentrating and recycling input species. Capital expenditures are minimized by precipitation of only side streams.Type: ApplicationFiled: April 13, 2009Publication date: June 9, 2011Applicant: Siemens Water Technologies Corp.Inventors: Joseph Edward Zuback, Richard Woodling
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Publication number: 20110132826Abstract: Embodiments of the present invention seek to provide a membrane distillation system having compact design and simplified connection system for fluid flow paths used in the system. According to one aspect, a membrane distillation system includes at least one membrane module and at least one like configured heat exchanger module, the modules being supported and connected to like configured manifold devices for providing fluid communication between said modules.Type: ApplicationFiled: August 13, 2009Publication date: June 9, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Heinz-Joachim Muller, Chan Mya Tun
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Publication number: 20110127209Abstract: A module arrangement (5) according to an embodiment of the invention consists of a plurality of membrane modules (6) arranged in a two dimensional array (7) and extending between upper and lower block-type manifolds (8) and (9), respectively. The array of modules is further divided into sub-groups of modules (10) separated from each other by space (11) extending transversely across the membrane array (7). An integrated support frame (12) is positioned in the space (11) between the sub-groups (10) and is fixed to the upper and lower manifold blocks (8) and (9) to form an integrated support structure within the module array (7).Type: ApplicationFiled: July 29, 2009Publication date: June 2, 2011Applicant: Siemens Water Technologies Corp.Inventors: Peter Rogers, Stephen Bowmer, Bruce Gregory Biltoft, James W. Polson, Robert James McMahon, Huw Alexander Lazaredes, Michael Collingnon
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Publication number: 20110129388Abstract: Chlorine dioxide generation systems and methods are disclosed. One or more reactants, such as sodium hypochlorite, may be electrolytically generated on-site for delivery to a reaction column. Low concentration reactants may be used to generate chlorine dioxide as part of a mixed oxy-chloro product stream containing free available chlorine. In at least one embodiment, an optical analyzer may be positioned along a reactant feed line to measure a concentration of reactant supplied to a reaction column. A controller may adjust a flow rate of the reactant in response to information provided by the optical analyzer. The controller may also perform pH control within the system. In some embodiments, the chlorine dioxide generator may be incorporated in an all-liquid water disinfection system.Type: ApplicationFiled: July 27, 2009Publication date: June 2, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Vince G. Alarid, Edward M. Martens, Bobby J. Owings, Glenn W. Holden
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Patent number: 7938966Abstract: A filtration arrangement including one or more membrane modules (5) positioned vertically within a feed tank (6), each membrane module (5) having one or more membranes positioned therein. An aeration hood (10) having an upper wall (11) and one or more downwardly extending side walls (12, 13) is configured to at least partially shroud the membrane modules (5) within the tank (6). The aeration hood (10) includes a number of open-ended tubes (14), each extending downwardly from the upper wall (11) and forming a respective opening (15) therein. Each tube (14) is adapted to have at least one of the modules (5) mounted therein and extending through the respective openings (15) in the upper wall (11) so as to at least partially surround an outer periphery of an associated module or modules (5). One or more aeration openings (17) are provided in each tube (14) at a location spaced from a proximal end of the tube (16).Type: GrantFiled: October 10, 2003Date of Patent: May 10, 2011Assignee: Siemens Water Technologies Corp.Inventor: Warren Thomas Johnson
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Publication number: 20110100907Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: ApplicationFiled: September 30, 2010Publication date: May 5, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Fufang Zha, Gerin James, Edward Joseph Zuback, Peter Zauner, Roger William Phelps
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Patent number: 7931808Abstract: A method and system of treating wastewater that can provide operating flexibility is disclosed. The system is operated with a sequencing batch reactor, which is typically cycling to any of fill, react, settle, decant, and idle stages, to treat the wastewater. The system can further utilize a membrane filtration system to further treat water from the sequencing batch reactor and produce suitable water. A solids-reducing system can be connected to the sequencing batch reactor and reduce an amount of biodegraded solids by converting the character or distribution of microorganisms population in the biomass.Type: GrantFiled: June 9, 2009Date of Patent: April 26, 2011Assignee: Siemens Water Technologies Corp.Inventors: Robert A. Elefritz, Jr., James Holland Scott, III
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Patent number: 7931463Abstract: An apparatus for potting membranes. The apparatus may include a mould for receiving ends of the membranes, means for forming a first layer of a curable resin material around the ends in the mould, and means for applying a second layer of a flexible resin material to the first layer prior to full curing of the first layer. The flexible resin material may be chemically reactive with the curable resin material to form an adhesive bond therebetween. A potting sleeve may be positioned within the mould. A centrifuge may receive the curable resin and/or the flexible resin material upstream of the mould.Type: GrantFiled: August 5, 2005Date of Patent: April 26, 2011Assignee: Siemens Water Technologies Corp.Inventors: David John Cox, Georg Schnieder, Fufang Zha, Joachim Muller, Cinzia Lea
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Publication number: 20110089105Abstract: A hybrid method and system of treating wastewater with reduced energy usage is disclosed. The treatment system has a sorption system, an anaerobic digester that digests or converts at least a portion of the solids or sludge from the sorption system, and an aerobic treatment tank that partially reduces oxygen demand of a portion of the sludge from the sorption tank.Type: ApplicationFiled: March 27, 2009Publication date: April 21, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Wenjun Liu, Edward J. Jordan, Joseph E. Zuback, George W. Smith
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Publication number: 20110079560Abstract: A system and method for the treating at least one undesirable constituent in an aqueous mixture utilizing a particulate solids catalyst. The aqueous mixture and the particulate solids catalyst form a slurry which is wet oxidized.Type: ApplicationFiled: April 3, 2009Publication date: April 7, 2011Applicant: SIEMENS WATER TECHNOLOGIES CORP.Inventors: Clayton B. Maugans, Bryan J. Kumfer, Chad L. Felch, William M. Copa
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Patent number: 7905245Abstract: A method and system of controlling addition of a treating agent based on a control function comprising a plurality of demand values is disclosed. Process parameters of a fluid to be treated are measured and one or more control signals are generated based on the measured process values and the control function. The control signals are used to actuate a treating agent dosing system and also used to monitor and compare the levels, status or condition of the treating agent. Additional features of the invention compensate for rain events.Type: GrantFiled: October 2, 2006Date of Patent: March 15, 2011Assignee: Siemens Water Technologies Corp.Inventors: Brett T. McQuade, David L. Morano
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Patent number: 7867417Abstract: Hydrophilic porous polymeric membranes with high permeabilities, and processes for the preparation thereof are disclosed. Membranes may be prepared by including a preferably hydrophilic cross-linkable component such as PVP (either by inclusion into the polymer dope prior to casting, or coating or quenching cast membranes); and treating the polymeric microfiltration or ultrafiltration membrane with a crosslinking agent to cross-link said cross-linkable component. Preferred cross-linking agents include Fenton's reagent.Type: GrantFiled: December 2, 2005Date of Patent: January 11, 2011Assignee: Siemens Water Technologies Corp.Inventor: Daniel Mullette
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Patent number: 7862719Abstract: A membrane module (3) comprising a plurality of porous hollow membranes (8). The membranes (8) extend between and are fixed at each end in a header (5, 6). One header (6) has one or more of openings (12) formed therein. The openings (12) are in fluid communication with a source of gas and/or liquid (13, 14, 15). The other of the headers (5) is sealingly connected to and in fluid communication with a head-piece (9). The head-piece (9) is adapted to couple to an associated head-piece of a further module to form a rack of modules (17). A potting head (6) for use in mounting porous hollow membranes (8) is also disclosed comprising a preformed potting element (29). The potting element (29) includes one or more cavities (30) for receiving curate potting material which, in use, supports said membranes (8).Type: GrantFiled: August 19, 2005Date of Patent: January 4, 2011Assignee: Siemens Water Technologies Corp.Inventors: Robert James McMahon, David John Cox, Fufang Zha, Roger William Phelps, Warren Thomas Johnson, Sargon Barkho
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Patent number: 7862014Abstract: In a tank for treating wastewater and including a first plurality of air diffuser elements and a second plurality of air diffuser elements, means for adjusting the relative height of the first diffuser elements with respect to the height of the second diffuser elements in response to changing operating conditions in the tank and changes in the characteristics of the diffusers.Type: GrantFiled: November 29, 2006Date of Patent: January 4, 2011Assignee: Siemens Water Technologies Corp.Inventors: John Lechner, Lawrence B. Ratzlow, Peter Petit
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Patent number: 7850851Abstract: A process for treating waste water to remove phosphorous and nitrogen in a treatment system including an anaerobic zone (5) containing an anaerobic mixed liquor having organisms which release phosphorous into the anaerobic mixed liquor; an anoxic zone (7) containing an anoxic mixed liquor having organisms which uptake phosphorous and denitrify the anoxic mixed liquor and an aerobic zone (9) containing an aerobic mixed liquor having organisms which uptake phosphorous and nitrify the aerobic mixed liquor; the process including the steps of providing wastewater to be treated into the anaerobic zone (5) and communicating anaerobic mixed liquor from the anaerobic zone (5) to the anoxic zone (7). The anoxic mixed liquor is then communicated from the anoxic zone (7) to the anaerobic zone (5) and the anoxic mixed liquor from the anoxic zone (7) to the amble zone (9).Type: GrantFiled: August 14, 2006Date of Patent: December 14, 2010Assignee: Siemens Water Technologies Corp.Inventors: Fufang Zha, Edward John Jordan
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Patent number: D637208Type: GrantFiled: April 13, 2009Date of Patent: May 3, 2011Assignee: Siemens Water Technologies Corp.Inventors: Peter Zauner, Fufang Zha, Roger William Phelps, Tomasz Swiatek