Patents by Inventor Hongqiang Ren

Hongqiang Ren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10618043
    Abstract: A method for preparing a catalyst, including: 1) uniformly mixing attapulgite, lithium-manganese spinel (Li—Mn spinel), manganese dioxide powders to form mixed raw material; adding water to the mixed raw material; stirring and mixing the mixed raw material and the water for between 5 and 15 min to yield a reaction mixture; 2) feeding the reaction mixture in 1) to a pelletizer to prepare spherical particles or hollow cylindrical particles; drying the spherical particles or the hollow cylindrical particles to yield a precursor; 3) heating the precursor in a muffle furnace, and calcining the precursor to yield a crude catalyst; 4) mixing the crude catalyst with an acid solution; alternating between ultrasound and microwave to wash the crude catalyst; and 5) washing the crude catalyst in 4) with water; and drying the catalyst for 12 hrs in air at 105° C.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: April 14, 2020
    Assignee: NANJING UNIVERSITY
    Inventors: Ke Xu, Shuhan Wen, Hongqiang Ren, Jinju Geng
  • Patent number: 10557177
    Abstract: A method for characterizing toxicity of toxic pollutants and a method for characterizing comprehensive toxicity of water bodies. The methods include constructing a reporter gene cell line expressing CHOP gene associated with endoplasmic reticulum stress.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 11, 2020
    Assignee: NANJING UNIVERSITY
    Inventors: Bing Wu, Yue Yu, Huimei Chen, Su Liu, Xuxiang Zhang, Hongqiang Ren
  • Patent number: 10556814
    Abstract: A denitrification biofilter device, including: a regulating pool, a reactor body, a water tank, a first doser, a second doser, a backwash pump, a water inlet pump, and a blower. The regulating pool includes a raw water inlet and a water outlet. The reactor body includes a uniform water distributor, a filler layer, a buffer layer, a filter layer, a supporting layer, a filler supporting plate, a backwash water outlet, a treated water outlet, and a backwash water inlet. The treated water outlet and the backwash water inlet are disposed at the bottom of the reactor body and are connected to the water tank via pipes. The filler layer is filled with zeolites having a grain size of between 4 and 8 mm, a density of between 1.9 and 2.6 g/cm3, a porosity greater or equal to 48%, and a specific surface area of between 570 and 670 m2/g.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: February 11, 2020
    Assignee: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Haidong Hu, Jinju Geng, Ke Xu
  • Publication number: 20190389756
    Abstract: Disclosed is an apparatus and an operating method for deep denitrification and toxicity reduction of wastewater. The apparatus comprises a regulation tank, an aeration biofilter, an ozone reaction tank, an ozone generation and diffusion device, and a denitrification biofilter. By the coupling reaction treatment of microorganisms, ozone, electrolysis and denitrification, an effect of refractory organic contaminants and nitrate nitrogen removal, deep denitrification and toxicity reduction can be achieved.
    Type: Application
    Filed: October 9, 2018
    Publication date: December 26, 2019
    Inventors: HUI HUANG, YILIN GAO, HONGQIANG REN, XUXIANG ZHANG, CHONG PENG
  • Publication number: 20190271676
    Abstract: A biological toxicity test method for evaluating an ecological safety of an advanced oxidation process comprising the following steps: (1) collecting (preparing) a waste water to be determined; (2) collecting the waste water and a tap water after the advanced oxidation process treatment; (3) subjecting Koi (Cyprinus carpio haematopterus) to the water after treatment for exposure to poison; (4) Determining an anti-oxidation enzyme activity of a liver of the Koi after exposure; (5) Data analyzing. By comparing the changes of liver enzyme activities in different water, the present method evaluates the toxicity changes of micro-pollutant containing water before and after treatment, which fills in the gap of the ecological risk assessment for advanced oxidation technology.
    Type: Application
    Filed: June 24, 2018
    Publication date: September 5, 2019
    Inventors: JINJU GENG, YINGYING FU, XINGSHENG GAO, HONGQIANG REN
  • Publication number: 20190178803
    Abstract: A method of measuring concentration of dissolved organic nitrogen in sewage. The method includes: filtering a sewage sample using a filter membrane; measuring the concentrations of total dissolved nitrogen (TDN), ammonia nitrogen (NH4+), and nitric nitrogen (NO3?) in the sewage sample, respectively designated as CTDN(I), CNH4+(I) and CNO3?(I); calculating the ratios of (CNH4+(I)+CNO3?(I))/CTDN(I) and CNO3?(I)/CNH4+(I), and according to the ratios, calculating the concentration of dissolved organic nitrogen (DON) in the sewage sample.
    Type: Application
    Filed: February 12, 2019
    Publication date: June 13, 2019
    Inventors: Hongqiang REN, Haidong HU, Jinju GENG, Lili DING, Hui HUANG
  • Publication number: 20190151779
    Abstract: A modular backwash assembly and method for using the same is disclosed, the modular backwash assembly comprises a filter brick body, an ultrasonic generator and an ultrasonic connecting component, the filter brick body is provided at an upper portion with a square trench and a cover, the square trench is provided with a plurality of stiffeners and fillers, and a conductive channel is provided on the periphery of the square trench and is provided with an ultrasonic conductive medium therein. The invention has the advantages of firm structure and durable, the gas distribution uniformity may be increased up to 96% and the turbidity average is below the specification 10 NTU.
    Type: Application
    Filed: May 25, 2018
    Publication date: May 23, 2019
    Inventors: Hui HUANG, Hongqiang REN, Xuxiang ZHANG, Jinju GENG, Qing WANG
  • Patent number: 10233103
    Abstract: The present invention discloses an advanced oxidation process of degrading nonsteroidal anti-inflammatory drugs in sewage by UV persulfate. The sewage flows to a secondary sedimentation tank by gravity, and sediments are precipitated and separated. Na2S2O8 solution is added therein, and a UV lamp is opened. Effluent result is analyzed after photooxidation. The sewage is transferred into a contact disinfection pool to react with ClO2 before discharging safely. The present invention uses a UV-based advanced oxidation process, which can effectively remove the nonsteroidal anti-inflammatory drugs in sewage, meets the requirements of sewage discharging, and decreases the environmental risk of nonsteroidal anti-inflammatory drugs. The method has some advantages such as simple equipments, easy operation, reasonable economy, as well as efficient treatment effect and high stability.
    Type: Grant
    Filed: June 18, 2017
    Date of Patent: March 19, 2019
    Assignee: NANJING UNIVERSITY
    Inventors: Jinju Geng, Xingsheng Gao, Hongqiang Ren, Ke Xu, Yan Zhang, Hui Huang
  • Patent number: 10099952
    Abstract: A method for treating organic wastewater includes: proceeding with anaerobic fermentation on organic wastewater to obtain a fermentation liquid; nitrifying a portion of the fermentation liquid to obtain a first fermentation liquid containing nitrate nitrogen, and separating the remaining portion of the fermentation liquid to obtain a second fermentation liquid containing propionic acid; mixing the first and second fermentation liquids to obtain a mixture; and removing nitrogen and phosphorus from the mixture and then proceeding with sedimentation to obtain a sediment and a supernatant discharged as purified water. An organic wastewater treating system includes an anaerobic fermentation reactor, an aeration tank, a fermentation liquid separating equipment, a biological removal reactor for removing nitrogen and phosphorus, and a sedimentation tank.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: October 16, 2018
    Assignees: Tongji University, Nanjing University
    Inventors: Yinguang Chen, Hongqiang Ren, Xiong Zheng, Haining Huang, Hui Liu
  • Publication number: 20180265386
    Abstract: The present invention discloses an advanced oxidation process of degrading nonsteroidal anti-inflammatory drugs in sewage by UV persulfate. The sewage flows to a secondary sedimentation tank by gravity, and sediments are precipitated and separated. Na2S2O8 solution is added therein, and a UV lamp is opened. Effluent result is analyzed after photooxidation. The sewage is transferred into a contact disinfection pool to react with ClO2 before discharging safely. The present invention uses a UV-based advanced oxidation process, which can effectively remove, the nonsteroidal anti-inflammatory drugs in sewage, meets the requirements of sewage discharging, and decreases the environmental risk of nonsteroidal anti-inflammatory drugs. The method has some advantages such as simple equipments, easy operation, reasonable economy, as well as efficient treatment effect and high stability.
    Type: Application
    Filed: June 18, 2017
    Publication date: September 20, 2018
    Inventors: JINJU GENG, XINGSHENG GAO, HONGQIANG REN, KE XU, YAN ZHANG, HUI HUANG
  • Publication number: 20180264457
    Abstract: A method for preparing a catalyst, including: 1) uniformly mixing attapulgite, lithium-manganese spinel (Li—Mn spinel), manganese dioxide powders to form mixed raw material; adding water to the mixed raw material; stirring and mixing the mixed raw material and the water for between 5 and 15 min to yield a reaction mixture; 2) feeding the reaction mixture in 1) to a pelletizer to prepare spherical particles or hollow cylindrical particles; drying the spherical particles or the hollow cylindrical particles to yield a precursor; 3) heating the precursor in a muffle furnace, and calcining the precursor to yield a crude catalyst; 4) mixing the crude catalyst with an acid solution; alternating between ultrasound and microwave to wash the crude catalyst; and 5) washing the crude catalyst in 4) with water; and drying the catalyst for 12 hrs in air at 105° C.
    Type: Application
    Filed: September 20, 2017
    Publication date: September 20, 2018
    Inventors: Ke XU, Shuhan WEN, Hongqiang REN, Jinju GENG
  • Patent number: 10041118
    Abstract: A method for analyzing water toxicity, the method including: exposure experiment, sample collection, transcriptome detection, metabolome detection, screening of differentially expressed genes, screening of differentially expressed metabolites, and identification of commonly changed biological pathways in both the transcriptome and the metabolome.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: August 7, 2018
    Assignee: NANJING UNIVERSITY
    Inventors: Yan Zhang, Hongqiang Ren, Bing Wu, Xuxiang Zhang
  • Publication number: 20180135139
    Abstract: A method for characterizing toxicity of toxic pollutants and a method for characterizing comprehensive toxicity of water bodies. The methods include constructing a reporter gene cell line expressing CHOP gene associated with endoplasmic reticulum stress.
    Type: Application
    Filed: January 11, 2018
    Publication date: May 17, 2018
    Inventors: Bing WU, Yue YU, Huimei CHEN, Su LIU, Xuxiang ZHANG, Hongqiang REN
  • Publication number: 20180136168
    Abstract: A device for supervising biofilm culturing, the device including: a fixed seat including an upper end; a supervision chamber; two ultrasonic sensing probes; a first mounting chamber; a second mounting chamber disposed between the fixed seat and the supervision chamber; an ultrasonic generator; an oscilloscope; and a controller. The first and second mounting chambers are disposed at two opposite ends of the supervision chamber, respectively. The two ultrasonic sensing probes are disposed in the first and second mounting chambers, respectively. The second mounting chamber is connected to the upper end of the fixed seat. The two ultrasonic sensing probes each are respectively connected to the ultrasonic generator, the oscilloscope, and the controller successively.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Inventors: Hongqiang REN, Jinfeng WANG, Lili DING, Jianxin LI, Huimin FU, Hui HUANG
  • Patent number: 9970909
    Abstract: A device for evaluating a scale inhibitor for a circulating cooling water system, the device including: an open vessel, the open vessel including a first fixing hole, a second fixing hole, and at least one test hole; a stirrer; a test piece; a condenser; and a constant temperature heater. The open vessel is disposed inside the constant temperature heater. The first fixing hole is used to fix the stirrer. The second fixing hole is used to fix the condenser. The test hole is used to fix the test piece.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: May 15, 2018
    Assignee: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Zhanhui Shen, Ke Xu, Jinju Geng, Xinkun Ren
  • Patent number: 9902637
    Abstract: A method for degrading artificial sweeteners from sewage, the method including: 1) introducing sewage to a secondary sedimentation tank and precipitating sediments; 2) collecting a supernatant from the secondary sedimentation tank, adding a NaOH solution or a perchloric acid solution to regulate the pH; adding an H2O2 solution to the supernatant to adjust a ratio of a molar concentration of H2O2 to a molar concentration of the sweetener in the resulting mixed solution to be between 1:1 and 30:1; transferring the resulting mixed solution to a photoreactor, irradiating the mixed solution by ultraviolet light, and stirring the mixed solution for between 5 and 30 min; and adding a 1.5% w/w aqueous NaNO2 solution to the mixed solution; and 3) collecting and analyzing an effluent obtained from 2), contacting the effluent with ClO2 for reaction in a disinfecting tank, and discharging the product.
    Type: Grant
    Filed: December 25, 2016
    Date of Patent: February 27, 2018
    Assignee: NANJING UNIVERSITY
    Inventors: Jinju Geng, Yuhang Ren, Hongqiang Ren, Ke Xu, Lili Ding
  • Publication number: 20180044213
    Abstract: A method for treating organic wastewater includes: proceeding with anaerobic fermentation on organic wastewater to obtain a fermentation liquid; nitrifying a portion of the fermentation liquid to obtain a first fermentation liquid containing nitrate nitrogen, and separating the remaining portion of the fermentation liquid to obtain a second fermentation liquid containing propionic acid; mixing the first and second fermentation liquids to obtain a mixture; and removing nitrogen and phosphorus from the mixture and then proceeding with sedimentation to obtain a sediment and a supernatant discharged as purified water. An organic wastewater treating system includes an anaerobic fermentation reactor, an aeration tank, a fermentation liquid separating equipment, a biological removal reactor for removing nitrogen and phosphorus, and a sedimentation tank.
    Type: Application
    Filed: December 29, 2016
    Publication date: February 15, 2018
    Inventors: Yinguang Chen, Hongqiang Ren, Xiong Zheng, Haining Huang, Hui Liu
  • Publication number: 20170267564
    Abstract: A method for degrading artificial sweeteners from sewage, the method including: 1) introducing sewage to a secondary sedimentation tank and precipitating sediments; 2) collecting a supernatant from the secondary sedimentation tank, adding a NaOH solution or a perchloric acid solution to regulate the pH; adding an H2O2 solution to the supernatant to adjust a ratio of a molar concentration of H2O2 to a molar concentration of the sweetener in the resulting mixed solution to be between 1:1 and 30:1; transferring the resulting mixed solution to a photoreactor, irradiating the mixed solution by ultraviolet light, and stirring the mixed solution for between 5 and 30 min; and adding a 1.5% w/w aqueous NaNO2 solution to the mixed solution; and 3) collecting and analyzing an effluent obtained from 2), contacting the effluent with ClO2 for reaction in a disinfecting tank, and discharging the product.
    Type: Application
    Filed: December 25, 2016
    Publication date: September 21, 2017
    Inventors: Jinju GENG, Yuhang REN, Hongqiang Ren, Ke XU, Lili DING
  • Publication number: 20170253890
    Abstract: A method for preparing a bacterial agent for removing ammonia-nitrogen, including: 1) activating a mixed microbial preparation including heterotrophic nitrification bacteria and aerobic denitrification bacteria; 2) inoculating the microbial preparation including heterotrophic nitrification bacteria and the aerobic denitrification bacteria to a membrane region including a double-layered filler; 3) introducing a culture solution of the microbial preparation to the membrane region from one side of the membrane region at a certain pressure and a certain flow rate to cultivate bacteria and discharging metabolites produced by the microbial preparation from the other side of the membrane region; 4) centrifuging a bacterial liquid obtained from cultivation to yield a concentrated bacterial suspension; and 5) adding a protecting agent to the concentrated bacterial suspension, uniformly dry spraying a resulting mixture to a sterilized carrier to yield a bacterial agent, and sealing the bacterial agent for storage.
    Type: Application
    Filed: December 8, 2016
    Publication date: September 7, 2017
    Inventors: Jinju GENG, Hongqiang REN, Ke XU, Lili DING
  • Patent number: 9611159
    Abstract: A Fenton reactor, including a body. The body includes: from the bottom up, a sewage introduction zone, a solid acid reaction zone, tubular ceramic membranes, and a water generation zone. A water feed pump, a first chemical feed pump, and a second chemical feed pump are disposed below the body. The outlets of the water feed pump, the first chemical feed pump, and the second chemical feed pump communicate with the water inlet of the body. The water feed pump, the first chemical feed pump, and the second chemical feed pump are provided with flow meters, respectively. The solid acid reaction zone is disposed above the sewage introduction zone, and the tubular ceramic membranes are disposed in the center of the solid acid reaction zone and separate the solid acid reaction zone to form a cavity. The water generation zone is disposed above the solid acid reaction zone.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: April 4, 2017
    Assignee: NANJING UNIVERSITY
    Inventors: Lili Ding, Mengtian Chen, Hongqiang Ren