公开(公告)号：US20240351923A1

公开(公告)日：2024-10-24

申请号：US18685535

申请日：2022-07-12

申请人： KUBOTA CORPORATION

发明人： Tomoko MATSUZAKI ,  Satoshi EZAKI

IPC分类号： C02F3/12 ,  B01D65/02 ,  C02F3/00

CPC分类号： C02F3/1273 ,  B01D65/02 ,  C02F3/006 ,  B01D2321/18 ,  C02F2209/225 ,  C02F2303/16

摘要： A water treatment apparatus is provided with: a treatment vessel into which a solution of interest S is fed; a hollow fiber membrane which is immersed in the solution of interest S in the treatment vessel and has gas permeability; and a biological membrane which is formed on the outer surface of the hollow fiber membrane and utilizes oxygen-containing air fed into the hollow fiber membrane. In the water treatment apparatus, the solution of interest S is treated with the biological membrane. The water treatment apparatus is also provided with a gas-diffusing tube which is located below the hollow fiber membrane and ejects a washing gas to wash the biological membrane; and an oxygen concentration meter which measures the oxygen concentration in discharged air that has passed through the hollow fiber membrane.

公开(公告)号：US12122698B2

公开(公告)日：2024-10-22

申请号：US17284568

申请日：2019-10-18

申请人： BL TECHNOLOGIES, INC.

发明人： Pierre Lucien Cote

IPC分类号： C02F3/30 ,  B01D63/02 ,  B01D65/00 ,  C02F3/10 ,  C02F3/12 ,  C02F3/20 ,  C02F3/28 ,  C02F101/16

CPC分类号： C02F3/307 ,  B01D63/02 ,  C02F3/1273 ,  C02F3/201 ,  C02F3/208 ,  B01D65/00 ,  B01D2313/26 ,  B01D2315/16 ,  C02F3/102 ,  C02F3/103 ,  C02F3/2806 ,  C02F3/301 ,  C02F2101/16 ,  C02F2303/20 ,  Y02W10/10

摘要： This specification describes a membrane aerated biofilm media and reactor (MABR) having a discontinuous layer of a porous material applied to the outer surface of a gas-transfer membrane. The porous material may have a void fraction of 50% or more. The porous material may have a thickness of up to about 500 microns and a pattern on the same order of magnitude as its thickness. The media may be used to carry on a deammonification reaction. In use, ammonia oxidizing bacteria (AOB) and annamox bacteria grown in or on the media, with the annamox bacteria located primarily in the porous material. The supply of oxygen through the gas-transfer membrane is limited to suppress the growth of nitrite oxidizing bacteria (NOB). Excess biofilm is removed, for example by coarse bubble scouring. The media may be placed in an anoxic zone of an activated sludge plant, which may be upstream of an aerobic zone.

公开(公告)号：US12103877B2

公开(公告)日：2024-10-01

申请号：US16613720

申请日：2017-05-15

申请人： BL TECHNOLOGIES, INC.

发明人： Martha Dagnew ,  Kyle Waldner

IPC分类号： C02F3/20 ,  C02F3/00 ,  C02F3/12

CPC分类号： C02F3/208 ,  C02F3/006 ,  C02F3/1273 ,  C02F2209/225 ,  C02F2303/14

摘要： An overgrowth of worms can reduce the effluent quality of a membrane aerated biofilm reactor. A method of controlling the growth of worms in a membrane aerated biofilm includes discontinuing all oxygen sources to a tank containing the biofilm and fluid flows flow into the tank. The tank is maintained in this idle condition for a period of time sufficient to kill at least some of the worms living in the biofilm. The method may be applied periodically to inhibit the formation of an excessive population of worms or retroactively to reduce an already excessive population of worms.

公开(公告)号：US20230373831A1

公开(公告)日：2023-11-23

申请号：US18246929

申请日：2021-09-27

申请人： Carollo Engineers, Inc.

发明人： John Fraser ,  Andrew Gilmore

IPC分类号： C02F3/30 ,  C02F3/12

CPC分类号： C02F3/301 ,  C02F3/1273 ,  C02F2305/12

摘要： A treatment system and method for removal of nutrients and other pollutants to produce a low solid, high quality effluent suitable for discharge or reuse using a combination of aerobic granular sludge (AGS), either in a sequencing batch reactor (SBR) AGS configuration or in a flow through AGS configuration, in combination with immersed/submerged membranes commonly referred to as membrane bio-reactor (MBR) wastewater treatment processes, systems, and methods.

公开(公告)号：US10071929B2

公开(公告)日：2018-09-11

申请号：US15403427

申请日：2017-01-11

申请人： HITACHI, LTD.

发明人： Yasunori Sekine ,  Kazuhiko Noto ,  Akira Sasaki ,  Kotaro Kitamura

IPC分类号： B01D61/58 ,  C02F9/00 ,  C02F1/44 ,  B01D61/02 ,  B01D61/14 ,  C02F1/00 ,  C02F3/12 ,  B01D61/06 ,  C02F103/08

CPC分类号： C02F9/00 ,  B01D61/022 ,  B01D61/025 ,  B01D61/06 ,  B01D61/145 ,  B01D61/58 ,  B01D2317/022 ,  B01D2317/025 ,  C02F1/001 ,  C02F1/441 ,  C02F1/444 ,  C02F3/1268 ,  C02F3/1273 ,  C02F2103/08 ,  C02F2303/10 ,  Y02A20/131 ,  Y02W10/15 ,  Y02W10/30

摘要： This desalinization system, which obtains industrial-use water and drinking water from seawater and wastewater, is provided with: a purification device that purifies wastewater by removing activated sludge therefrom; a first RO membrane that removes salt from the output of the purification device by transferring said salt to first concentrated water, thereby producing industrial-use water; a UF membrane that seawater passes through and that removes particulates from said seawater; a second RO membrane that removes salt from the treated output of the UF membrane by transferring said salt to second concentrated water, producing drinking water; an agitation device to which the second concentrated water from the second RO membrane and the first concentrated water from the first RO membrane are sent to be agitated; and a third RO membrane removing salt from the liquid mixture agitated by the agitation device by transferring said salt to third concentrated water, producing industrial-use water.

公开(公告)号：US20180221825A1

公开(公告)日：2018-08-09

申请号：US15746995

申请日：2016-03-01

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： Eiji IMAMURA ,  Tokiko YAMAUCHI ,  Nozomu YASUNAGA

IPC分类号： B01D65/02 ,  C02F1/44 ,  C02F3/12 ,  C02F1/00 ,  B01D69/02

CPC分类号： B01D65/02 ,  B01D69/02 ,  B01D2321/04 ,  B01D2321/168 ,  B01D2325/38 ,  C02F1/008 ,  C02F1/44 ,  C02F3/1273 ,  C02F2209/03 ,  C02F2209/23 ,  C02F2303/16 ,  Y02W10/15

摘要： Provided is a water treatment method, in which a cycle including: a filtration step of filtering water to be treated through a separation membrane from a primary side to a secondary side of the separation membrane; and a backwashing step of washing the separation membrane from the secondary side to the primary side is repeated, the water treatment method including the steps of: injecting, into the separation membrane, ozone to be used in the backwashing step; and when, of the repeated cycles, a previous cycle is defined as a first cycle and a following cycle subsequent to the first cycle is defined as a second cycle, setting an ozone injection amount to be injected in the second cycle to a value equal to or less than an ozone injection amount injected in the first cycle.

公开(公告)号：US10010834B2

公开(公告)日：2018-07-03

申请号：US14496852

申请日：2014-09-25

申请人： KUBOTA CORPORATION

发明人： Yasuyuki Yoshida ,  Yuji Ohtsuka

IPC分类号： B01D65/02 ,  B01D65/08 ,  B01D61/14 ,  B01D61/16 ,  B01D61/22 ,  C02F3/12 ,  C02F1/00 ,  C02F1/44 ,  C02F3/00 ,  C02F3/30

CPC分类号： B01D65/08 ,  B01D61/147 ,  B01D61/16 ,  B01D61/22 ,  B01D65/02 ,  B01D2311/14 ,  B01D2315/06 ,  B01D2321/185 ,  B01D2321/40 ,  C02F1/008 ,  C02F1/44 ,  C02F3/006 ,  C02F3/1273 ,  C02F3/301 ,  C02F2203/002 ,  C02F2209/006 ,  C02F2209/03 ,  C02F2209/38 ,  C02F2209/40 ,  C02F2303/16 ,  C02F2303/24 ,  Y02W10/15

摘要： A membrane separation device includes a separation membrane immersed in water to be treated and an air diffusion device positioned below the separation membrane, and provides treated water that has permeated through the separation membrane while diffusing air from the air diffusion device towards the separation membrane. A target value setting step sets a target value of an amount of diffusion air diffused from the air diffusion device based on a transmembrane pressure difference, and the air diffusion device is controlled such that the amount of the diffusion air becomes the target value. In the target value setting step, an absolute value of a change or a rate of change in the target value for increasing the amount of the air diffusion is set greater than an absolute value of a change or a rate of change in the target value for decreasing the amount of the air diffusion.

公开(公告)号：US20180117534A1

公开(公告)日：2018-05-03

申请号：US15853025

申请日：2017-12-22

申请人： DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.

发明人： Jaeho HO ,  Shaleena SMITH ,  Gyu Dong KIM ,  Jaren PATAMASANK ,  Petia TONTCHEVA ,  Hyung Keun ROH

IPC分类号： B01D65/02 ,  B01D65/08 ,  C02F1/34 ,  C02F3/12 ,  C02F3/30

CPC分类号： B01D65/02 ,  B01D65/08 ,  B01D2315/06 ,  B01D2321/2058 ,  C02F1/34 ,  C02F3/1263 ,  C02F3/1273 ,  C02F3/302 ,  C02F3/308 ,  C02F2203/006 ,  C02F2303/20 ,  Y02W10/15

摘要： The present invention relates to membrane bioreactor (“MBR”) system that includes a mechanical membrane reciprocation system to reduce or eliminate membrane fouling. The disclosed MBR system can be operated with higher flux and lower fouling than MBR systems using air scouring. Furthermore the system can remove nitrogen and phosphorous with one RAS and one or no internal recirculation line. The membrane can be reciprocated by a low RPM motor connected to a pulley via belt to rotate rotor to convert rotational motion into reciprocating motion of membrane. Various mechanical means can also be employed to create the reciprocating motion.

公开(公告)号：US20180111096A1

公开(公告)日：2018-04-26

申请号：US15562948

申请日：2016-04-19

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Hiromu TANAKA ,  Hiroko MIKI ,  Tomoyuki YONEDA ,  Toru MORITA

IPC分类号： B01D65/02 ,  C02F1/44 ,  B01D63/02 ,  C02F3/12

CPC分类号： B01D65/02 ,  B01D63/02 ,  B01D63/043 ,  B01D2311/04 ,  B01D2311/2688 ,  B01D2315/06 ,  B01D2317/04 ,  B01D2321/185 ,  C02F1/44 ,  C02F3/12 ,  C02F3/1273 ,  C02F2209/40 ,  C02F2303/16 ,  C02F2303/20

摘要： A membrane separation type activated sludge treatment method according to an embodiment of the present invention includes a step of performing biological treatment on waste water; and a step of performing membrane separation after the biological treatment step, wherein the membrane separation step is performed with a plurality of filtration modules including a plurality of hollow fiber membranes arranged adjacent to one another and oriented in one direction and a pair of holding members fixing both ends of the plurality of hollow fiber membranes, and a number of the filtration modules operated is changed in accordance with variations in an inflow rate of waste water in the biological treatment step.

公开(公告)号：US20180028982A1

公开(公告)日：2018-02-01

申请号：US15694495

申请日：2017-09-01

申请人： SNU R&DB FOUNDATION

发明人： Chung-Hak LEE ,  Seon-Ki LEE ,  Kibaek LEE ,  Sang Hyun LEE ,  Dong-Chan CHOI

IPC分类号： B01D65/08 ,  C12N11/04 ,  C02F3/12 ,  C02F1/44 ,  C02F3/34

CPC分类号： B01D65/08 ,  B01D2315/06 ,  B01D2321/166 ,  C02F1/444 ,  C02F3/1273 ,  C02F3/341 ,  C02F3/342 ,  C02F3/348 ,  C02F2303/20 ,  C12N11/04 ,  Y02W10/15

摘要： The present disclosure relates to a technique for inhibiting biofouling of the surface of a membrane caused by a biofilm, through immobilizing biofilm formation-inhibiting microorganisms to a container in a membrane water treatment process. The present disclosure provides a non-hollow/hollow columnar or sheet-like permeable carrier with flowability owing to submerged aeration and a container with biofilm formation-inhibiting microorganisms immobilized therein, comprising biofilm formation-inhibiting microorganisms immobilized in the carrier. The present disclosure also provides a membrane water treatment apparatus comprising a reactor accommodating water to be treated, a membrane module for water treatment and a container with biofilm formation-inhibiting microorganisms immobilized therein placed in the reactor.