公开(公告)号：US20210269339A1

公开(公告)日：2021-09-02

申请号：US16769914

申请日：2019-04-30

Applicant: XIAMEN UNIVERSITY OF TECHNOLOGY

Inventor： Bin YAN

IPC: C02F3/30 ,  C02F3/28 ,  C02F3/12 ,  C02F3/34

Abstract: The present invention provides a method for treating dye wastewater. The method includes: firstly, homogenizing the dye wastewater to balance the quality of the dye wastewater from different processes; then subjecting the homogenized dye wastewater to anaerobic treatment to remove most of chemical oxygen demand (COD) and total suspended solids (SS) in the wastewater; and finally subjecting the dye wastewater after the anaerobic treatment to circulating anaerobic-oxic treatment in a membrane bioreactor (MBR). In the present invention, the MBR is filled with a quinone-based hollow fiber membrane. The quinone acts as an electron mediator to accelerate an enzymatic reaction for dye decolorization during the anaerobic process, thereby achieving the purpose of efficient decolorization. The oxic treatment process further removes the COD and SS in the wastewater, so that the effluent meets a first-level discharge standard. The results of the examples show that by treating the dye wastewater by the method provided by the present invention, the COD in the effluent is less than 100 mg/L, the chromaticity is less than 20 times, and the SS is 0.

公开(公告)号：US20210269340A1

公开(公告)日：2021-09-02

申请号：US16769942

申请日：2019-05-27

Applicant: XIAMEN UNIVERSITY OF TECHNOLOGY

Inventor： Bin YAN

IPC: C02F3/30 ,  C02F3/12 ,  C02F3/28 ,  B01D69/08 ,  B01D71/34 ,  B01D69/02

Abstract: Disclosed is a method for treating wastewater containing heavy metal. First, the wastewater containing heavy metal is subjected to a homogenization treatment, such that the water quality of the wastewater containing heavy metal from different processes is homogenized. The homogenized wastewater containing heavy metal is subjected to an anaerobic-aerobic circulating treatment in a membrane bioreactor (2), in which heavy metal ions are reduced by the action of microorganisms in the anaerobic treatment process. The membrane bioreactor (2) is filled with a hollow fiber membrane (3) containing a quinone group, which serves as an electron mediator that can accelerate the enzymatic reduction of heavy metal ions during the anaerobic treatment. During the aerobic treatment, the COD and SS in the wastewater are further removed.

公开(公告)号：US20210095103A1

公开(公告)日：2021-04-01

申请号：US16744796

申请日：2020-01-16

Applicant: CMT Membrane Technology (Xiamen) Co., Ltd. ,  Xiamen Jiarong Technology Corp., Ltd ,  Xiamen University of Technology

Inventor： Zhipeng MA ,  Bin YAN ,  Jing ZHOU ,  Tingliang ZHONG

IPC: C08L9/02 ,  C08K3/04 ,  C08K9/06 ,  C08K9/08 ,  C08K5/14 ,  C08K5/13 ,  C08K5/3492 ,  C08K5/3415

Abstract: The present invention provides a nitrile rubber composite, a preparation method thereof and a sealing ring using the composite, and belongs to the technical field of composite materials. The nitrile rubber composite provided by the present invention contains the following preparation raw materials in parts by mass: 100 parts of crude nitrile rubber, 0.1-5 parts of liquid nitrile rubber modified graphene oxide; 60-90 parts of liquid nitrile rubber modified carbon black; 1-3 parts of anti-aging agent; 2-6 parts of compound vulcanizing agent; and 1-3 parts of accelerant. In the nitrile rubber composite provided by the present invention, liquid nitrile rubber and crude nitrile rubber have a similar structure, liquid nitrile rubber modified graphene oxide and carbon black are adopted such that the obtained liquid nitrile rubber modified graphene oxide, liquid nitrile rubber modified carbon black and crude nitrile rubber have a good compatibility, and liquid nitrile rubber also can participate in the vulcanization of nitrile rubber. The sealing ring is prepared by using the nitrile rubber composite of the present invention to produce a sealing ring that is high in hardness and tensile strength, low in permanent compression and long in service life.

公开(公告)号：US20210188676A1

公开(公告)日：2021-06-24

申请号：US16769924

申请日：2019-04-30

Applicant: XIAMEN UNIVERSITY OF TECHNOLOGY

Inventor： Bin YAN

IPC: C02F3/30 ,  C02F3/12 ,  C02F3/28 ,  B01D69/08 ,  B01D69/02 ,  B01D71/06 ,  C02F1/00

Abstract: A method for treating domestic sewage includes: preliminarily treating the domestic sewage through a grating and a grit chamber, so as to remove large-particle solids in the domestic sewage; and subjecting the domestic sewage after the preliminary treatment to circulating anaerobic-oxic treatment in a membrane bioreactor (MBR). In the oxic treatment process, microorganisms oxidize nitrogen in the sewage into nitrite or nitrate. Under anaerobic conditions, denitrifying bacteria in the microorganisms reduce the nitrate, releasing molecular nitrogen or nitrous oxide. In the present invention, the MBR is filled with a quinone-based hollow fiber membrane. During the microbial denitrification, the quinone acts as an electron transfer carrier to participate in the denitrification to promote the reduction of the nitrate (nitrite), increasing the denitrification rate under anaerobic conditions, and achieving the purpose of efficient denitrification.

公开(公告)号：US20210094001A1

公开(公告)日：2021-04-01

申请号：US16793288

申请日：2020-02-18

Applicant: CMT Membrane Technology (Xiamen) Co., Ltd. ,  Xiamen Jiarong Technology Corp., Ltd ,  Xiamen University of Technology

Inventor： Rushun WANG ,  Zhiqun YUAN ,  Jing ZHOU ,  Bin YAN ,  Zhipeng MA ,  Tingliang ZHONG

IPC: B01D61/08 ,  B01D61/02 ,  B01D65/00

Abstract: A disc tube reverse osmosis module is provided. In various embodiments, deflector disc assemblies and associated membranes are sequentially alternately disposed from top to bottom. The upper flange is in sealing connection with the central pull rod, the upper lock nut is in threaded connection with an upper end of the central pull rod and located above the upper flange, the yielding water collecting pipe sleeves the central pull rod and is in sealing connection with a lower side of the lower flange, the lower lock nut is in threaded connection with a lower end of the central pull rod, an end of the yielding water receiving pipe is fixedly connected to the yielding water collecting pipe, an inner surface of the shell is respectively in sealing connection with the upper flange and the lower flange, and the water inlet receiving pipe and the concentrated liquid receiving pipe are fixed to the lower flange.

公开(公告)号：US20180093228A1

公开(公告)日：2018-04-05

申请号：US15821845

申请日：2017-11-24

Applicant: XIAMEN UNIVERSITY OF TECHNOLOGY

Inventor： Bin YAN ,  Yuping WANG ,  Qian YE

IPC: B01D69/12 ,  B01D71/34 ,  B01D61/14 ,  B01D67/00 ,  C02F1/44 ,  C08F8/00 ,  C08J7/12

Abstract: This present disclosure relates to a method for preparation of polyvinylidene fluoride membrane with functional anthraquinones. The method is carried out according, to the following steps: step 1: preparing 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethoxyl naphthalene; step 2: preparing polyvinylidene fluoride-aromatic ether copolymers: polyvinylidene fluoride was used as the initiator, 2-(1-hydroxy-3-butene) -1,4,5,8-tetramethoxynaphthalene was the monomer, N,N-dimethylformamide was solvent, cuprous chloride/Me6TREN was the catalytic, polyvinylidene fluoride-aromatic ether copolymer was synthesized by atomic transfer radical polymerization; step 3: reducing the polyvinylidene fluoride-aromatic ether copolymer to quinone by demethoxy oxidation; step 4: using the product of step 3 and N, N-dimethylformamide a film-forming reagents, then scraping into a membrane. Further, the anthraquinone which fixed in the polyvinylidene fluoride membrane would not fall off.