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公开(公告)号：US20240269617A1
公开(公告)日：2024-08-15
申请号：US18567966
申请日：2022-06-24
Applicant: Toray Industries, Inc.
Inventor： Yohito Ito , Seiko Kantani , Genki Inagaki
CPC classification number: B01D65/02 , C02F3/1273 , B01D2321/16 , B01D2321/40 , B01D2325/02834 , C02F2209/008 , C02F2209/11 , C02F2303/16
Abstract: An object of the present invention is to provide a specific method for determining the fouling potential of an activated sludge solution on the basis of the characteristics of the activated sludge solution after chemical cleaning of a membrane, and to provide a suitable method for resuming operation in a rational manner after chemical cleaning of the membrane, while accurately determining the degree of recovery of the membrane filtration characteristics for the activated sludge solution. Moreover, an object of applying the present invention is to enable more effective suppression of an increase in a transmembrane pressure difference after chemical cleaning than in the prior art, leading to a reduction in the cleaning frequency of the membrane and a reduction in the used amount of cleaning chemicals and to extension of the life of the membrane.
The present invention relates to a method for operating a membrane-separation activated sludge treatment device after chemical cleaning of a membrane, the method including, after the chemical cleaning of the membrane is completed, controlling an operating condition until a normal filtration operation is resumed on the basis of characteristics of an activated sludge solution.-
Patent Agency Ranking
公开(公告)号：US20170274325A1
公开(公告)日：2017-09-28
申请号：US15101176
申请日：2014-12-02
Applicant: TORAY INDUSTRIES, INC.
Inventor： Tomohiro Maeda , Masahide Taniguchi , Yohito Ito
CPC classification number: B01D65/02 , B01D61/025 , B01D61/04 , B01D61/58 , B01D63/024 , B01D69/08 , B01D2311/04 , B01D2311/25 , B01D2315/08 , B01D2317/025 , B01D2321/02 , B01D2321/04 , B01D2321/16 , B01D2321/168 , B01D2321/185 , C02F1/001 , C02F1/04 , C02F1/283 , C02F1/42 , C02F1/441 , C02F1/442 , C02F1/444 , C02F1/66 , C02F3/1273 , C02F2001/5218 , C02F2103/08 , C02F2209/01 , C02F2209/03 , C02F2209/04 , C02F2209/08 , C02F2209/10 , C02F2209/11 , C02F2209/20 , C02F2209/21 , C02F2209/22 , C02F2209/29 , C02F2209/36 , C02F2209/40 , C02F2303/20 , Y02A20/131 , Y02W10/15
Abstract: The present invention relates to a water treatment method including: a filtration step of feeding water to be treated to a membrane filtration device having loaded therein a porous separation membrane and performing filtration treatment to obtain filtrate; a discharging step of discharging the water to be treated in the membrane filtration device, which has been separated and concentrated by the porous separation membrane; and a cleaning step of cleaning the porous separation membrane by at least one treatment of physical cleaning and chemical cleaning, in which a cycle including a combination of the filtration step, the discharging step and the cleaning step is repeated multiple times, thereby obtaining filtrate. In each cycle, the filtration step and the discharging step are repeated multiple times, and the cleaning step is then carried out.
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公开(公告)号：US08759045B2
公开(公告)日：2014-06-24
申请号：US13707816
申请日：2012-12-07
Applicant: Toray Industries, Inc.
Inventor： Masateru Ito , Shin-ichi Minegishi , Eri Shimizu , Kenji Sawai , Yohito Ito , Hideki Sawai , Katsushige Yamada
IPC: C12P7/56
CPC classification number: C12P7/56 , B01D61/027 , B01D71/56 , B01D2311/06 , B01D2311/18 , B01D2311/2669
Abstract: A method of producing lactic acid by separating lactic acid produced in a culture solution by microbial fermentation, comprising: a step (A) of filtering the culture solution through a nano-filtration membrane; and a step (B) of distilling a lactic-acid-containing solution produced in step (A) under a pressure of 1 Pa to atmospheric pressure (inclusive) at a temperature of 25 to 200° C. (inclusive) to recover lactic acid.
Abstract translation: 通过微生物发酵分离培养液中产生的乳酸来生产乳酸的方法，包括：通过纳滤膜过滤培养液的步骤（A）; 和在步骤（A）中制备的含乳酸的溶液在25℃至200℃（含）的温度下，在1Pa至大气压（1Pa）以上的压力下蒸馏以回收乳酸 。
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公开(公告)号：US20130095539A1
公开(公告)日：2013-04-18
申请号：US13707816
申请日：2012-12-07
Applicant: Toray Industries, Inc.
Inventor： Masateru Ito , Shin-ichi Minegishi , Eri Shimizu , Kenji Sawai , Yohito Ito , Hideki Sawai , Katsushige Yamada
IPC: C12P7/56
CPC classification number: C12P7/56 , B01D61/027 , B01D71/56 , B01D2311/06 , B01D2311/18 , B01D2311/2669
Abstract: A method of producing lactic acid by separating lactic acid produced in a culture solution by microbial fermentation, comprising: a step (A) of filtering the culture solution through a nano-filtration membrane; and a step (B) of distilling a lactic-acid-containing solution produced in step (A) under a pressure of 1 Pa to atmospheric pressure (inclusive) at a temperature of 25 to 200° C. (inclusive) to recover lactic acid.
Abstract translation: 通过微生物发酵分离培养液中产生的乳酸来生产乳酸的方法，包括：通过纳滤膜过滤培养液的步骤（A）; 和在步骤（A）中制备的含乳酸的溶液在25℃至200℃（含）的温度下，在1Pa至大气压（1Pa）的压力下蒸馏以回收乳酸 。
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公开(公告)号：US11414331B2
公开(公告)日：2022-08-16
申请号：US16498983
申请日：2018-03-28
Applicant: TORAY INDUSTRIES, INC.
Inventor： Seiko Kantani , Kyoya Takemoto , Kazunori Tomioka , Yohito Ito
Abstract: Provided is an effluent treatment method based on a membrane separation activated sludge method, the effluent treatment method being characterized in that activated sludge collected from a membrane separation activated sludge tank is observed by an optical means, image processing is performed, and effluent treatment conditions are controlled in accordance with the results thereof.
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公开(公告)号：US10703657B2
公开(公告)日：2020-07-07
申请号：US16097086
申请日：2017-03-30
Applicant: TORAY INDUSTRIES, INC.
Inventor： Seiko Kantani , Yohito Ito , Hideaki Ando
IPC: C02F3/12 , C02F3/20 , B01D63/08 , B01D65/02 , C02F11/147
Abstract: In a waste water treatment method using membrane separation-activated sludge, when, during filtration while supplying air using an immersion-type membrane separation unit loaded with multiple flexible membranes, the filtration differential pressure of the membranes at a set filtration flow rate exceeds a specified value P2 with respect to the filtration differential pressure P1 of the initial period of operation, membrane filtration is continued with air supply stopped until the filtration differential pressure P3 becomes P3≥P1+20 [kPa]. Then with the filtration flux or filtration pressure being smaller or negative compared to when filtering while supplying air, air is supplied and after the filtration differential pressure P4 during filtration reaches P4≤P1+5 [kPa], filtration is returned to filtration while supplying air.
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