公开(公告)号：US20240336507A1

公开(公告)日：2024-10-10

申请号：US18560118

申请日：2022-05-26

申请人： Evoqua Water Technologies LLC

发明人： Simon P Dukes ,  Joshua Griffis ,  Li-Shiang Liang ,  Harshita Gogoi ,  Wenxin Du ,  Thomas K Mallmann

IPC分类号： C02F9/00 ,  B01D61/02 ,  B01D61/14 ,  B01D61/16 ,  B01D61/58 ,  C02F1/00 ,  C02F1/44 ,  C02F1/52 ,  C02F1/66 ,  C02F5/00 ,  C02F101/14 ,  C02F103/34

CPC分类号： C02F9/00 ,  B01D61/16 ,  B01D61/58 ,  B01D61/026 ,  B01D61/027 ,  B01D61/029 ,  B01D61/145 ,  B01D2311/04 ,  B01D2311/08 ,  B01D2317/025 ,  B01D2317/08 ,  C02F1/004 ,  C02F1/441 ,  C02F1/442 ,  C02F1/444 ,  C02F1/5236 ,  C02F1/66 ,  C02F5/00 ,  C02F2101/14 ,  C02F2103/34 ,  C02F2301/08

摘要： A system for the treatment of phosphate-containing wastewater comprises a pretreatment subsystem including a mixing chamber configured to mix a potassium-based salt with the wastewater to precipitate K2SiF6 from the wastewater, a solids-liquid separator to separate the precipitated K2SiF6 from the wastewater and form a pretreated wastewater, and a mixing chamber to dilute the pretreated wastewater with raw wastewater, and a filtration subsystem including a first filtration configured to receive the pretreated wastewater and remove particles to form a first effluent, a second filtration unit remove divalent ions from the first effluent and form a second effluent, and a third filtration unit configured to remove additional dissolved solids from the second effluent and form a third effluent suitable for discharge to the environment.

公开(公告)号：US20240325988A1

公开(公告)日：2024-10-03

申请号：US18192110

申请日：2023-03-29

申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

发明人： Nadeem BAIG ,  Asif MATIN ,  Irshad AHMAD ,  Safyan Akram KHAN

IPC分类号： B01D69/10 ,  B01D61/02 ,  B01D67/00 ,  B01D69/02 ,  B01D69/12 ,  B01D69/14 ,  B01D71/02 ,  B01D71/60 ,  B01J20/02 ,  B01J20/26 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  C02F1/44

CPC分类号： B01D69/1071 ,  B01D61/027 ,  B01D67/00793 ,  B01D69/02 ,  B01D69/1214 ,  B01D69/148 ,  B01D71/022 ,  B01D71/60 ,  B01J20/0233 ,  B01J20/262 ,  B01J20/28007 ,  B01J20/28035 ,  B01J20/28083 ,  B01J20/28085 ,  B01J20/3071 ,  B01J20/3085 ,  B01J20/3212 ,  B01J20/3214 ,  B01J20/3272 ,  B01J20/3295 ,  C02F1/442 ,  B01D2323/48 ,  B01D2325/02832 ,  B01D2325/06 ,  C02F2101/308

摘要： A membrane includes a polysulfone-based support, a polydopamine (PDA) layer disposed on a surface of the polysulfone-based support, and a silver/polydopamine (Ag/PDA) composite layer disposed on a surface of the polydopamine layer. The polysulfone-based support has a pore size of up to 600 nanometers (nm). The Ag/PDA composite layer contains core-shell structure particles and spherical particles. The core-shell structure particles have a silver nanoparticle core and a polydopamine shell. The spherical particles are silver-decorated polydopamine particles. The membrane can at least partially separate an Erichrome Black T (EBT) dye from an EBT dye/salt containing mixture by rejecting the EBT dye and allowing the EBT dye/salt containing mixture to pass through the membrane.

公开(公告)号：US12102963B2

公开(公告)日：2024-10-01

申请号：US17608081

申请日：2020-04-13

申请人： BL Technologies, Inc.

发明人： Nick Antonopoulos ,  Michael Doupe ,  Tamizh Aruvi Kanagasabai ,  Ravi Chandra Reddy Kapa ,  Irving Elyanow

IPC分类号： B01D61/02 ,  B01D61/08 ,  B01D61/12 ,  C02F1/44 ,  C02F103/08

CPC分类号： B01D61/029 ,  B01D61/025 ,  B01D61/027 ,  B01D61/08 ,  B01D61/12 ,  C02F1/441 ,  C02F1/442 ,  B01D2311/06 ,  B01D2311/08 ,  B01D2317/022 ,  B01D2317/08 ,  C02F2103/08 ,  C02F2209/40

摘要： A high salinity feed water such as seawater is treated to produce a reverse osmosis (RO) concentrate and an RO permeate. Optionally, some or all of the RO concentrate may be filtered to produce a nanofiltration (NF) permeate. Optionally, some feed water can also be filtered to produce NF permeate without first being concentrated by RO treatment. The NF permeate, or a blend of the RO permeate and NF permeate, may be used to produce a product water for injection into an oil-bearing reservoir to enhance oil recovery. Optionally, the product water may have salinity greater than the feedwater, or at least 30 g/L. The product water may have hardness of less than 20 mg/L.

公开(公告)号：US20240308883A1

公开(公告)日：2024-09-19

申请号：US18672395

申请日：2024-05-23

申请人： Greentech Environment Co., Ltd.

发明人： Mu LIU ,  Yingqiang SU ,  Zehua LI ,  Mengyuan DUAN ,  Kai SUN ,  Xikun ZHU ,  Liyan ZHANG ,  Cong XIAO ,  Huiming HAN

IPC分类号： C02F1/44

CPC分类号： C02F1/442 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/03 ,  C02F2301/04 ,  C02F2303/20

摘要： A hollow fiber nanofiltration membrane system and its control method are provided. The system includes a water feeding system, a return system, a hollow fiber nanofiltration membrane group, a water production system, a cleaning system, a dosing system and a program control system. Through the self-matching, self-adaptation and self-adjustment functions of the program control system, an intelligent and accurate operation control is formed according to water quality and operation condition. In the control method, the program control system presets an operation mode according to a preset working condition and an inlet water quality, automatically selects whether to add the scale inhibitor or perform concentrated water return at a beginning of filtration, automatically outputs a dosage of the scale inhibitor or the concentrated water return flow, and monitor a change of the inlet water quality, and the feedwater pressure or a transmembrane pressure in real time.

公开(公告)号：US20240286087A1

公开(公告)日：2024-08-29

申请号：US18428803

申请日：2024-01-31

申请人： The University of Hong Kong

发明人： Li WANG ,  Chuyang TANG

IPC分类号： B01D69/12 ,  B01D61/02 ,  B01D71/56 ,  C02F1/44 ,  C08J7/04

CPC分类号： B01D69/1251 ,  B01D61/027 ,  B01D71/56 ,  C02F1/442 ,  C08J7/0427 ,  C08J2377/06 ,  C08J2477/06

摘要： A thin film composite nanofiltration (TFC-NF) membrane is produced by forming a dispersion of aramid nanofibers (ANFs) in a water miscible polar organic solvent that is formed into a thin film that is contacted with an aqueous solution of a di- and/or poly-amine. This amine absorbed film has a solution of one or more di-, tri, and/or poly acid chlorides in a water immiscible polar organic solvent poured onto the supported film. Upon removal of residual solutions, optionally the film can be activated, and upon drying the TFC-NF membrane is isolated. The TFC-NF membrane produced by this process is superior in permeability and selectivity for use in water purification by nanofiltration.

公开(公告)号：US12054409B2

公开(公告)日：2024-08-06

申请号：US17565949

申请日：2021-12-30

申请人： Saudi Arabian Oil Company

发明人： Fahd Ibrahim AlGhunaimi ,  Hind Saleh Aldossary ,  Mona Saad Dossary ,  Tao Chen ,  Mohammed A. Bataweel ,  Abadi A. Mutairi ,  Norah W. Aljuryyed

IPC分类号： C02F1/44 ,  C02F1/52 ,  C02F101/10 ,  C02F103/08 ,  C02F103/10

CPC分类号： C02F1/5236 ,  C02F1/442 ,  C02F2101/101 ,  C02F2103/08 ,  C02F2103/10 ,  C02F2209/10 ,  C02F2305/00

摘要： A process of treating nano-filtration membrane retentate comprises introducing seawater comprising a sulfate ion concentration of greater than or equal to 3000 mg/l to the NF membrane to produce a retentate stream and a permeate stream, wherein the retentate stream has a sulfate ion concentration greater than or equal to 10,000 mg/l, and mixing barium additives comprising barium chloride dehydrate (BaCl2·2H2O), barium chloride (BaCl2), or both with the retentate stream to precipitate sulfate from the retentate stream to form barite (BaSO4) and reduce the sulfate ion concentration, wherein the barium additives are added into the retentate stream at a barium ion concentration of greater than 10,000 mg/l.

公开(公告)号：US20240217855A1

公开(公告)日：2024-07-04

申请号：US18394993

申请日：2023-12-22

申请人： Pentair, Inc.

发明人： Derek Sajdak ,  Chuanfang Yang ,  Robert Orvin Crowder ,  Charles Bulger ,  Ezra Coughlin ,  Vaughn Stetter

IPC分类号： C02F9/20 ,  B01D61/04 ,  B01D61/08 ,  B01D65/08 ,  C02F1/44

CPC分类号： C02F9/20 ,  B01D61/04 ,  B01D61/081 ,  B01D65/08 ,  C02F1/441 ,  C02F1/442 ,  B01D2311/04 ,  B01D2311/12 ,  B01D2311/14 ,  B01D2311/16 ,  B01D2311/246 ,  B01D2311/2649 ,  B01D2311/268 ,  B01D2321/02 ,  B01D2321/04 ,  B01D2321/10 ,  B01D2321/12 ,  B01D2321/162 ,  B01D2321/167 ,  B01D2321/40 ,  C02F2209/005 ,  C02F2209/02 ,  C02F2209/03 ,  C02F2209/04 ,  C02F2209/06 ,  C02F2209/10 ,  C02F2209/11 ,  C02F2209/40 ,  C02F2307/10

摘要： A water treatment system is provided. The system includes a prefiltration unit for filtering the untreated water in fluid communication with a source of untreated water. The prefiltration unit produces a prefiltered water from the untreated water. A pump in fluid communication with the prefiltration unit can selectively increase the flow rate of the prefiltered water in a first line, the first line in fluid communication with a membrane element. The membrane element produces a permeate and a retentate from the prefiltered water, the permeate being imparted with a lower concentration of solutes than the retentate. A tank in fluid communication with the membrane element and the prefiltration unit stores prefiltered water from the prefiltration unit and the permeate from the membrane element. One or more valves regulate the flow of prefiltered water and the permeate, and one or more sensors can measure characteristics of the prefiltered water.

公开(公告)号：US12023628B2

公开(公告)日：2024-07-02

申请号：US17501684

申请日：2021-10-14

申请人： Greentech Environment Co., Ltd.

发明人： Mu Liu ,  Xiaofeng Lin ,  Zehua Li ,  Yingqiang Su ,  Xiaohong Niu ,  Huiming Han ,  Xiaofang Zhang

IPC分类号： B01D61/04 ,  B01D61/02 ,  B01D65/02 ,  C02F1/44 ,  C02F9/00 ,  B01D65/08 ,  C02F1/00

CPC分类号： B01D61/04 ,  B01D61/027 ,  B01D65/02 ,  C02F1/442 ,  C02F9/00 ,  B01D65/08 ,  C02F1/001 ,  C02F2209/03 ,  C02F2209/05 ,  C02F2303/16

摘要： The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.

公开(公告)号：US11999636B2

公开(公告)日：2024-06-04

申请号：US17555443

申请日：2021-12-18

申请人： SOOCHOW UNIVERSITY

发明人： Jianmei Lu ,  Dongyun Chen

IPC分类号： C02F1/44 ,  B01D67/00 ,  B01D69/12 ,  B01D71/02 ,  B01J20/20 ,  B01J20/26 ,  B01J20/28 ,  B01J20/32 ,  C02F101/30

CPC分类号： C02F1/442 ,  B01D67/0083 ,  B01D67/0088 ,  B01D69/12 ,  B01D71/0212 ,  B01D71/022 ,  B01J20/205 ,  B01J20/262 ,  B01J20/28035 ,  B01J20/3204 ,  B01J20/3223 ,  B01J20/3272 ,  B01J20/3297 ,  C02F2101/308

摘要： A method for purifying dye-containing wastewater based on a porous-polymer-modified metal carbon nanotube membrane includes: (1) preparing the porous-polymer-modified metal carbon nanotube membrane; and (2) passing the dye-containing wastewater through the porous-polymer-modified metal carbon nanotube membrane to remove dyes in the dye-containing wastewater. A device for purifying dye-containing wastewater is also disclosed. The device includes the porous-polymer-based metal carbon nanotube membrane.

公开(公告)号：US11938450B1

公开(公告)日：2024-03-26

申请号：US18242922

申请日：2023-09-06

申请人： Dileep Agnihotri ,  Masoud Aghajani ,  Sriram Sambasivam ,  Joseph John Barelli ,  Ian Tonner

发明人： Dileep Agnihotri ,  Masoud Aghajani ,  Sriram Sambasivam ,  Joseph John Barelli ,  Ian Tonner

IPC分类号： B01D63/10 ,  B01D61/02 ,  B01D61/10 ,  B01D61/12 ,  B01D65/08 ,  B01D65/10 ,  C02F1/44 ,  C02F103/08

CPC分类号： B01D65/109 ,  B01D61/026 ,  B01D61/0271 ,  B01D61/10 ,  B01D61/12 ,  B01D63/10 ,  B01D65/08 ,  C02F1/441 ,  C02F1/442 ,  B01D2317/02 ,  C02F2103/08 ,  C02F2209/02 ,  C02F2209/03 ,  C02F2209/05 ,  C02F2209/40 ,  C02F2301/08 ,  C02F2303/14 ,  C02F2303/22

摘要： A novel reverse osmosis or nanofiltration system (RO/NF) capable of detecting and responding to onset of fouling within the system utilizing uniquely configured membrane permeate flow path within the system which generates a time-sensitive data. Membrane performance data in real-time operating conditions is then utilized for rapid detection of membrane fouling, fouling rate, and cause of fouling, followed by controller-based system generated actions to stop, and recover from fouling or slow-down fouling, and, if required, to predict, plan, and schedule operator intervention steps to recover optimum system operating conditions. The end-result is a novel energy-efficient and fouling-managed advanced (machine learning) reverse osmosis system for brackish water desalination.