Patents by Inventor Steven Kristian Pedersen
Steven Kristian Pedersen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240091708Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.Type: ApplicationFiled: November 14, 2023Publication date: March 21, 2024Inventors: Pierre Lucien COTE, Steven Kristian PEDERSEN, Wajahat Hussain SYED, Jeffrey Gerard PEETERS, Nicholas William H. ADAMS, Youngseck HONG, Geert-Henk KOOPS, James John ROYSTON
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Patent number: 11850554Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.Type: GrantFiled: November 2, 2018Date of Patent: December 26, 2023Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Steven Kristian Pedersen, Wajahat Hussain Syed, Jeffrey Gerard Peeters, Nicholas William H. Adams, Youngseck Hong, Geert-Henk Koops, James John Royston
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Publication number: 20230331605Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.Type: ApplicationFiled: June 20, 2023Publication date: October 19, 2023Inventors: Pierre Lucien COTE, Steven Kristian PEDERSEN
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Patent number: 11724947Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.Type: GrantFiled: August 20, 2020Date of Patent: August 15, 2023Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Steven Kristian Pedersen
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Publication number: 20230045679Abstract: An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.Type: ApplicationFiled: October 18, 2022Publication date: February 9, 2023Inventors: Pierre Lucien COTE, John David IRELAND, Nicholas William H. ADAMS, Steven Kristian PEDERSEN
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Patent number: 11505483Abstract: An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.Type: GrantFiled: June 25, 2015Date of Patent: November 22, 2022Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, John David Ireland, Nicholas William H. Adams, Steven Kristian Pedersen
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Patent number: 11352269Abstract: A conventional media filter such as a gravity sand filter is converted into a membrane filter. The media is removed and replaced by immersed membrane modules. Transmembrane pressure is created by a static head pressure differential, without a suction pump, thereby creating a membrane gravity filter (MGF). Preferred operating parameters include transmembrane pressure of 5-20 kPa, 1-3 backwashes per day, and a flux of 10-20 L/m2/h. The membranes are dosed with chlorine or another oxidant, preferably at 700 minutes*mg/L as Cl2 equivalent per week or less. The small oxidant does is believed to provide a porous biofilm or fouling layer without substantially removing the layer. The media filter may be modified so that backwash wastewater is removed from near the bottom of the tank rather than through backwash troughs above the membrane modules. Membrane integrity testing may be done while the tank is emptied after a backwash.Type: GrantFiled: March 23, 2020Date of Patent: June 7, 2022Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Jason Cadera, Steven Kristian Pedersen, Nicholas William H. Adams
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Publication number: 20220134274Abstract: A device for separating a gas stream which has a compressor and three membrane separation units in series, connected to pass the retentate stream of each of the first two units to the subsequent membrane separation unit, comprises conduits for recycling the permeate streams of the second and the third membrane separation unit to upstream of the compressor and a control device controlling the fraction of the second permeate stream which is recycled. Adjusting which fraction of the second permeate is recycled can be used to maintain a target composition of the retentate obtained in the third membrane separation unit when the flow rate or the composition of the gas stream changes.Type: ApplicationFiled: January 22, 2020Publication date: May 5, 2022Applicants: EVONIK FIBRES GMBH, EVONIK CANADA INC., EVONIK CORPORATIONInventors: Steven Kristian PEDERSEN, Hendrik Derk HOVING, Markus PRISKE, Kah Peng LEE, Norbert KRUTZLER
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Publication number: 20200377397Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.Type: ApplicationFiled: August 20, 2020Publication date: December 3, 2020Inventors: Pierre Lucien COTE, Steven Kristian PEDERSEN
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Patent number: 10781119Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.Type: GrantFiled: February 22, 2013Date of Patent: September 22, 2020Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Steven Kristian Pedersen
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Publication number: 20200216330Abstract: A conventional media filter such as a gravity sand filter is converted into a membrane filter. The media is removed and replaced by immersed membrane modules. Transmembrane pressure is created by a static head pressure differential, without a suction pump, thereby creating a membrane gravity filter (MGF). Preferred operating parameters include transmembrane pressure of 5-20 kPa, 1-3 backwashes per day, and a flux of 10-20 L/m2/h. The membranes are dosed with chlorine or another oxidant, preferably at 700 minutes*mg/L as Cl2 equivalent per week or less. The small oxidant does is believed to provide a porous biofilm or fouling layer without substantially removing the layer. The media filter may be modified so that backwash wastewater is removed from near the bottom of the tank rather than through backwash troughs above the membrane modules. Membrane integrity testing may be done while the tank is emptied after a backwash.Type: ApplicationFiled: March 23, 2020Publication date: July 9, 2020Inventors: Pierre Lucien COTE, Jason CADERA, Steven Kristian PEDERSEN, Nicholas William H. ADAMS
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Patent number: 10633263Abstract: A conventional media filter such as a gravity sand filter is converted into a membrane filter. The media is removed and replaced by immersed membrane modules. Transmembrane pressure is created by a static head pressure differential, without a suction pump, thereby creating a membrane gravity filter (MGF). Preferred operating parameters include transmembrane pressure of 5-20 kPa, 1-3 backwashes per day, and a flux of 10-20 L/m2/h. The membranes are dosed with chlorine or another oxidant, preferably at 700 minutes*mg/L as Cl2 equivalent per week or less. The small oxidant does is believed to provide a porous biofilm or fouling layer without substantially removing the layer. The media filter may be modified so that backwash wastewater is removed from near the bottom of the tank rather than through backwash troughs above the membrane modules. Membrane integrity testing may be done while the tank is emptied after a backwash.Type: GrantFiled: March 4, 2016Date of Patent: April 28, 2020Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Jason Cadera, Steven Kristian Pedersen, Nicholas William H. Adams
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Publication number: 20190135667Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.Type: ApplicationFiled: November 2, 2018Publication date: May 9, 2019Inventors: Pierre Lucien COTE, Steven Kristian PEDERSEN, Wajahat Hussain SYED, Jeffrey Gerard PEETERS, Nicholas William H. ADAMS, Youngseck HONG, Geert-Henk KOOPS, James John ROYSTON
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Patent number: 10160679Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.Type: GrantFiled: March 11, 2015Date of Patent: December 25, 2018Assignee: BL Technologies, Inc.Inventors: Pierre Lucien Cote, Steven Kristian Pedersen, Wajahat Hussain Syed, Jeffrey Gerard Peeters, Nicholas William H. Adams, Youngseck Hong, Geert-Henk Koops, James John Royston
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Patent number: 10137619Abstract: Hollow fiber membranes are potted by injecting a liquid material into a substantially closed cavity (44) containing the fibers. The cavity may be formed in part by the interaction of a mold a permeate pan (52) and a layer of an adhesive pre-applied to a bundle of the membranes.Type: GrantFiled: July 15, 2014Date of Patent: November 27, 2018Assignee: ZENON TECHNOLOGY PARTNERSHIPInventors: Robert Szabo, Gabor Bakos, Attila Palinkas, Steven Kristian Pedersen
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Publication number: 20180037473Abstract: A conventional media filter such as a gravity sand filter is converted into a membrane filter. The media is removed and replaced by immersed membrane modules. Transmembrane pressure is created by a static head pressure differential, without a suction pump, thereby creating a membrane gravity filter (MGF). Preferred operating parameters include transmembrane pressure of 5-20 kPa, 1-3 backwashes per day, and a flux of 10-20 L/m2/h. The membranes are dosed with chlorine or another oxidant, preferably at 700 minutes*mg/L as Cl2 equivalent per week or less. The small oxidant does is believed to provide a porous biofilm or fouling layer without substantially removing the layer. The media filter may be modified so that backwash wastewater is removed from near the bottom of the tank rather than through backwash troughs above the membrane modules. Membrane integrity testing may be done while the tank is emptied after a backwash.Type: ApplicationFiled: March 4, 2016Publication date: February 8, 2018Inventors: Pierre Lucien COTE, Jason CADERA, Steven Kristian PEDERSEN, Nicholas William H. ADAMS
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Publication number: 20180022625Abstract: An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.Type: ApplicationFiled: June 25, 2015Publication date: January 25, 2018Inventors: Pierre Lucien COTE, John David IRELAND, Nicholas William H. ADAMS, Steven Kristian PEDERSEN
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Patent number: 9643129Abstract: Various methods of making a reinforced membrane, devices for making the membranes, and the resulting membranes are described. The methods typically provide a reinforcing structure that includes filaments extending around the circumference of the membrane but without the filaments being part of a braided or woven structure. Some of the reinforcing structures also include longitudinal filaments. The methods and devices can be used to make a supporting structure in line with membrane formation steps, and also allow for a reinforced membrane to be produced that has a ratio of inside-to-outside diameters of 0.5 or more.Type: GrantFiled: May 20, 2015Date of Patent: May 9, 2017Assignee: BL TECHNOLOGIES, INC.Inventors: Pierre Lucien Cote, Steven Kristian Pedersen
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Publication number: 20170088449Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.Type: ApplicationFiled: March 11, 2015Publication date: March 30, 2017Applicant: General Electric CompanyInventors: Pierre Lucien COTE, Steven Kristian PEDERSEN, Wajahat Hussain SYED, Jeffrey Gerard PEETERS, Nicholas William H. ADAMS, Youngseck HONG, Geert-Henk KOOPS, James John ROYSTON
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Publication number: 20160184777Abstract: Various methods of making a reinforced membrane, devices for making the membranes, and the resulting membranes are described. The methods typically provide a reinforcing structure that includes filaments extending around the circumference of the membrane but without the filaments being part of a braided or woven structure. Some of the reinforcing structures also include longitudinal filaments. The methods and devices can be used to make a supporting structure in line with membrane formation steps, and also allow for a reinforced membrane to be produced that has a ratio of inside-to-outside diameters of 0.5 or more.Type: ApplicationFiled: May 20, 2015Publication date: June 30, 2016Inventors: Pierre Lucien Cote, Steven Kristian Pedersen