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公开(公告)号：US20210213392A1
公开(公告)日：2021-07-15
申请号：US15930468
申请日：2020-05-13
发明人： Zhiwei WANG , Ruobin DAI , Hongwei ZHANG , Liang WANG , Hongyi HAN , Tianlin WANG
摘要： A high-performance thin-film composite polyamide membrane upcycled from a substrate fouled with a biopolymer and a preparation method thereof are provided. The method includes fouling the substrate preferably with the biopolymer to obtain a composite of the substrate and a biopolymer foulant layer; then immersing the composite into a first solution formed by dissolving a polyamine monomer in water, followed by taking the composite out of the first solution and removing excess droplets from a surface of the composite; then immersing the composite treated in the previous step into a second solution formed by dissolving an acyl chloride monomer in n-hexane for interfacial polymerization to form a rejection layer on the surface of the composite; and after completion of the reaction, taking the composite out of the second solution, followed by drying and heat treatment, to obtain the target polyamide membrane.
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2.发明申请公开(公告)号：US20220297036A1
公开(公告)日：2022-09-22
申请号：US17322944
申请日：2021-05-18
申请人： Tongji University
发明人： Zhiwei WANG , Chenxin TIAN , Ruobin DAI , Tianlin WANG , Jiansuxuan CHEN
摘要： A method for recycling a scrapped polyvinylidene fluoride (PVDF) membrane through chemical cleaning-structural transformation-hydrophilicity is disclosed, which can extend the service life of scrapped PVDF membrane materials (namely, membrane at the end of service life). The method includes the following steps: cleaning a scrapped membrane with sodium hypochlorite and citric acid; treating the membrane with a structural transformation agent, where, irreversible contaminants are washed away while the PVDF membrane is subjected to pore expansion and hydrophilization; and with self-polymerization of dopamine on a membrane surface, further improving the hydrophilicity of the membrane surface, enhancing the anti-contamination performance, and repairing damaged points on the surface of the scrapped PVDF membrane produced during long-term operation.
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公开(公告)号：US20220266201A1
公开(公告)日：2022-08-25
申请号：US17325236
申请日：2021-05-20
申请人： Tongji University
发明人： Zhiwei WANG , Hongyi HAN , Ruobin DAI , Tianlin WANG , Chenxin TIAN
摘要： A polyamide (PA) nanofiltration (NF) membrane and a preparation method thereof by regeneration from a scrapped microfiltration (MF) membrane are provided. The method adopts a cleaning-repairing-interfacial polymerization upgrading strategy, where, sodium hypochlorite and oxalic acid are used for deeply cleaning a scrapped MF membrane. PDA is used as a repairing agent to construct a reaction platform on the membrane surface, and finally a reaction system of piperazine and trimesoyl chloride (TMC) are used to form a PA NF membrane with a PA active layer. The repairing can construct a coating with a given thickness and prominent hydrophilicity on the membrane surface, which provides favorable base membrane conditions for upgrading and preparing an NF membrane.
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4.发明申请公开(公告)号：US20170095775A1
公开(公告)日：2017-04-06
申请号：US15362991
申请日：2016-11-29
申请人： TONGJI UNIVERSITY
发明人： Zhiwei WANG , Mei CHEN , Xingran ZHANG , Xueye WANG , Junjian ZHENG , Chen PAN , Zhichao WU , Qiaoying WANG
CPC分类号： B01D67/0013 , B01D65/08 , B01D67/0011 , B01D67/0016 , B01D69/02 , B01D69/06 , B01D71/34 , B01D71/36 , B01D71/42 , B01D71/68 , B01D2323/12 , B01D2325/48 , C02F1/44
摘要： This invention provides a polymeric separation membrane that has excellent durable antibacterial effect and stain resistance, and a preparation method thereof. The polymeric separation membrane can be widely applied for water treatment, which belongs to the field of water treatment and membrane separation science and technology. The polymeric separation membrane containing quaternary ammonium salt is prepared by the immersion precipitation phase inversion method, using quaternary ammonium salt mixed with polymer and additives. This modification method effectively improves the antibacterial and antifouling ability of the polymeric separation membrane prolongs the service life of membranes and significantly inhibits the reproduction of bacterial and microbial. The preparation method has the advantages of simple process, easy operation, easy for promotion, and also avoids expensive equipment. The polymeric separation membrane has great antibacterial ability and stain resistance, therefore, it has potential application in the field of water treatment.
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5.发明申请HIGHLY EFFECTIVE SEWAGE TREATMENT BASED ON REGULATION AND CONTROL OF DIRECTED ELECTRON FLOW AND APPARATUS THEREOF 审中-公开基于指导电子流量的调节和控制的高效节能处理及其设备公开(公告)号：US20170066668A1
公开(公告)日：2017-03-09
申请号：US15357678
申请日：2016-11-21
申请人： TONGJI UNIVERSITY
发明人： Zhiwei WANG , Jinxing MA , Kaili YAN , Mei CHEN , Wei SHAO , Jian LIU , Xuanbo WANG , Chang ZHANG , Zhichao WU , Qiaoying WANG
CPC分类号： C02F3/005 , C02F3/1273 , C02F3/14 , C02F3/2806 , C02F3/303 , C02F3/305 , C02F3/308 , C02F9/00 , C02F2001/46133 , C02F2001/46152 , C02F2101/16 , H01M8/16 , Y02E60/527 , Y02W10/15
摘要： This present disclosure relates to a highly effective sewage treatment based on regulation and control of directed electron flow and apparatus thereof The apparatus includes an anaerobic fermentation electron generation chamber, a heterotrophic-autotrophic denitrification chamber and an aerobic membrane separation chamber. Low concentrated organic sewage is introduced into anaerobic fermentation electron generation chamber; then, particulate and partly dissolved organic substances are intercepted and absorbed by carrier materials; and extracellular currents generated by microorganism reaction are used in following autotrophic denitrification processing. Micro-/ultra-membrane separation processing is used to improve operation load and solid-liquid separation effect of sewage treatment and thereby effluent could meet the high recycling standards. The directed electron flow is regulated and controlled to enhance nutrients' removal and to reduce sludge yield and fouling rate of membrane. The sewage treatment could efficiently treat low concentrated organic sewage at normal temperature (>15° C.) and dramatically decrease energy consumption.
摘要翻译： 本公开涉及一种基于定向电子流的调节和控制的高效污水处理及其装置。该装置包括厌氧发酵电子发生室，异养 - 自养反硝化室和好氧膜分离室。 将低浓度有机污水引入厌氧发酵电子发生室; 然后，颗粒和部分溶解的有机物质被载体材料截取和吸收; 并且通过微生物反应产生的细胞外电流用于以下自养反硝化处理。 微/超膜分离处理用于提高污水处理的操作负荷和固液分离效果，从而达到高回收标准。 定向电子流被调节和控制，以增强营养物质的去除，并降低污泥的产率和膜的结垢率。 污水处理可以在常温（> 15℃）下有效地处理低浓度有机污水，大大降低能耗。
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6.发明申请公开(公告)号：US20210009446A1
公开(公告)日：2021-01-14
申请号：US16845093
申请日：2020-04-10
申请人： Tongji University
发明人： Zhiwei WANG , Mei CHEN , Zhichao WU
摘要： An electrochemical membrane module for selectively removing pollutants and a preparation method thereof are provided. A Ti/SnO2—Sb substrate electrode is coated with a MI-TiO2 sol-gel by means of a dip-coating method, and then sintered to obtain a molecular imprinting type Ti/MI-TiO2/SnO2—Sb coated electrode; the coated electrode is adhered to a ceramic micro-filtration membrane using epoxy resin glue to obtain a Ti/MI-TiO2/SnO2—Sb MI-anodic conductive composite membrane; the MI-anodic conductive composite membrane is used as an anode, and a titanium mesh is used as a cathode, so that the electrochemical membrane module capable of selectively removing pollutants is obtained. The invention effectively combines an electrochemical micro-filtration membrane and a molecular imprinting technique. When the electrochemical membrane module is used, suspended particles and refractory organics in the sewage are removed, and a highly selective removal of certain refractory pollutants can be achieved.
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公开(公告)号：US20220219126A1
公开(公告)日：2022-07-14
申请号：US17326365
申请日：2021-05-21
申请人： Tongji University
发明人： Zhiwei WANG , Wei SHI , Huimin ZHOU , Xueye WANG
摘要： A zeolite membrane and a preparation method thereof are provided. The method includes: adding an organic binder solution dropwise to zeolite, and thoroughly grinding and stirring; blade-coating a resulting mixture on a substrate at a given thickness; and drying to obtain the zeolite membrane. The preparation of a zeolite membrane does not require a complicated hydrothermal crystal growth process, and the membrane can be prepared directly from natural zeolite or artificial zeolite. A prepared zeolite membrane has the characteristics of simple preparation process, low cost, prominent water permeability, high contaminant rejection rate and high zeolite load. The zeolite membrane, when used for the rejection of contaminants in water, can not only remove macromolecular contaminants in water, but also efficiently remove ammonia nitrogen by way of ion exchange, which is suitable for advanced treatment of wastewater.
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公开(公告)号：US20210198123A1
公开(公告)日：2021-07-01
申请号：US15930454
申请日：2020-05-13
发明人： Zhiwei WANG , Yang LI , Hongwei ZHANG , Jie WANG , Xueye WANG
摘要： A flexible electrocatalytic membrane for removing nitrate from water, a preparation method and use thereof are provided. The method of the present invention includes dropwise adding an aramid fiber solution into deionized water to prepare an aramid nanofiber sol, then reacting an ethanol solution containing 3,4-ethylenedioxythiophene and ferric nitrate with the aramid nanofiber sol to prepare a conductive aramid nanofiber sol, and finally dropwise adding MXene nanosheets ultrasonically pretreated by a tetramethylammonium hydroxide solution into the conductive aramid nanofiber sol to prepare the flexible electrocatalytic membrane. The prepared flexible electrocatalytic membrane possesses good mechanical strength and flexibility, and can not only effectively remove nitrate but also avoid failure of electrocatalytic materials due to surface fouling in the process of electrocatalytic reduction of nitrate, and thus has a long service life.
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公开(公告)号：US20210198122A1
公开(公告)日：2021-07-01
申请号：US16934054
申请日：2020-07-21
发明人： Zhiwei WANG , Hongwei ZHANG , Liang WANG , Jiayi LI , Xueye WANG , Mei CHEN , Ruobin DAI
摘要： A device for decomplexation and enhanced removal of copper based on self-induced Fenton-like reaction constructed by electrochemistry coupled with membrane separation is disclosed. The device includes a reactor, two electrocatalytic anodes capable of generating hydroxyl radicals, an electrocatalytic cathode membrane assembly, a direct current power supply, an aeration system, an inlet pipe and an outlet pipe. The device of the present invention has a simple construction. Using this device to treat industrial wastewater containing copper complexes under specific conditions allows the decomplexation and the removal of the industrial wastewater containing the copper complexes to be simultaneously realized at a low consumption and a high efficiency. The coupling of electrochemistry with membrane separation can be achieved to protect the cathode from being contaminated by pollutants in the sewage and prolong the service life of the electrode.
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公开(公告)号：US20210060497A1
公开(公告)日：2021-03-04
申请号：US16882752
申请日：2020-05-26
发明人： Zhiwei WANG , Yue WEN , Hongwei ZHANG , Jie WANG , Yingqing CHEN , Zhichao WU
摘要： A thin-film composite polyamide reverse osmosis membrane with anti-bacterial and anti-biofouling effects and a preparation method thereof are disclosed. The preparation method includes: dissolving a highly water-stable metal organic framework CuBTTri in an n-hexane solution containing trimesoyl chloride by ultrasonic wave, immersing a polyethersulfone ultrafiltration membrane in an aqueous solution of m-phenylene diamine and taking out, and then immersing the ultrafiltration membrane in the trimesoyl chloride-n-hexane solution containing the aforementioned metal organic framework for reaction and modification, so as to obtain the thin-film composite polyamide reverse osmosis membrane. The resulting composite reverse osmosis membrane integrated with the anti-bacterial metal organic framework CuBTTri has a high reverse osmosis membrane permeability and possesses greatly improved and persistent anti-bacterial and anti-biofouling properties. The preparation method is simple and conducive to promotion, and has mild conditions.
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