Patents by Inventor Lili Ding

Lili Ding 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: 11014835
    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: Grant
    Filed: June 15, 2020
    Date of Patent: May 25, 2021
    Assignee: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Haidong Hu, Jinju Geng, Lili Ding, Hui Huang
  • Publication number: 20200308027
    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: June 15, 2020
    Publication date: October 1, 2020
    Inventors: Hongqiang REN, Haidong HU, Jinju GENG, Lili DING, Hui HUANG
  • Patent number: 10712315
    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: Grant
    Filed: January 15, 2018
    Date of Patent: July 14, 2020
    Assignee: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Jinfeng Wang, Lili Ding, Jianxin Li, Huimin Fu, Hui Huang
  • 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: 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: 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: 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
  • Patent number: 9561976
    Abstract: A coupling bioreactor in the form of a tower type seal structure filled with a suspended carrier. A water inlet pipe, an air inlet pipe, and a first microporous aerator are arranged at the bottom of the coupling reactor. The water inlet pipe is connected to a water distributor. The air inlet pipe is connected to the first microporous aerator. A gas inlet pipe and a second microporous aerator are arranged at the middle part of the coupling bioreactor and are connected with each other. An annular overflow weir is arranged at the upper part of the coupling bioreactor and is connected to a water outlet pipe. A gas outlet pipe is arranged at the top of the coupling bioreactor. The ratio of the height to the diameter of the coupling bioreactor is between 3 and 10.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: February 7, 2017
    Assignee: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Ke Xu, Lili Ding, Jinju Geng
  • Patent number: 9422180
    Abstract: A method for treatment of coke wastewater, including (1) introducing wastewater into a regulating reservoir into which an acid liquor is added until the pH value of the wastewater ranges between about 5.5 and about 6.5; (2) introducing the wastewater into a three-dimensional electrode treatment device for electrolysis treatment; and (3) introducing the wastewater into a coagulation reaction tank into which an alkali liquor is added until the pH value of the wastewater ranges between 8 and 10, and as a coagulant polysilicate ferric magnesium is added into the wastewater for a hybrid reaction of between 5 and 15 mins; allowing the wastewater to flow into a sedimentation basin for plain sedimentation of between 4 and 6 hrs; and extracting a supernatant liquor to yield a processed effluent.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: August 23, 2016
    Inventors: Hongqiang Ren, Xiaolei Shi, Lili Ding, Ming Liu, Xiaobing Hu
  • Publication number: 20160091468
    Abstract: A method for measuring a relative content of Gram-negative bacteria in an active sludge, the method including: 1) breaking zoogloeas in the active sludge; 2) isolating 2-keto-3-deoxyoctonic acid (KDO) from free bacteria and cell debris; 3) performing fluorescence labeling on the isolated KDO to obtain a fluorescent derivative; and 4) isolating the fluorescent derivative by high performance liquid chromatography (HPLC) and conducting quantitative measurement by fluorescence to obtain the relative content of the Gram-negative bacteria in the active sludge.
    Type: Application
    Filed: September 13, 2015
    Publication date: March 31, 2016
    Inventors: Hongqiang REN, Wenbo SU, Lili DING, Jinjv GENG, Ke XU, Yan ZHANG
  • Publication number: 20150336825
    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: Application
    Filed: May 20, 2015
    Publication date: November 26, 2015
    Inventors: Lili DING, Mengtian CHEN, Hongqiang REN
  • Publication number: 20150276680
    Abstract: A method for assessing bioaffinity of an organic biocarrier for wastewater treatment, the method including: 1) coating a matrix of an organic biocarrier on a standard chip to prepare a coated matrix chip; 2) preparing a testing water sample; 3) placing the coated matrix chip prepared in 1) in a quartz crystal microbalance (QCM), introducing the testing water sample prepared in 2) to the QCM, and measuring frequency data of the coated matrix chip under different overtones; and 4) fitting the frequency data of 3) using a Sauerbrey model to acquire variation of weights of an adlayer on a surface of the coated matrix chip with time; and comparing maximum fitted values of the weights of the adlayer on the surface of the coated matrix chip, to determine bioaffinity levels of the biocarriers to different testing water samples.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 1, 2015
    Inventors: Hongqiang REN, Hui HUANG, Lili DING, Jinju GENG, Ke XU, Yan ZHANG
  • Patent number: 9050558
    Abstract: A biotrickling filter for treating waste gas including a waste gas inlet, packing layers, a spray pipe, a spray liquid storage tank, and a waste gas outlet. The waste gas passes through a first packing layer after passing through the waste gas inlet and then passes through a second packing layer after changing the flow direction at the bottom of the first packing layer; the flow directions of the waste gas in the first packing layer and the second packing layer are opposite to form a cross-flow structure; the two different flow directions of the waste gas form a cross-flow unit, and two or more cross-flow units form the biotrickling filter.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: June 9, 2015
    Inventors: Hongqiang Ren, Yonggang Wu, Lili Ding
  • Patent number: 9010735
    Abstract: A contact reaction tower, including: a central cylinder; and an outer cylinder. Lift pipes and a water inlet pipe(s) are installed in the central cylinder, reflux windows are formed on the wall of the central cylinder, and the water flow circulation between the central cylinder and the outer cylinder is realized through the lift pipes, the water inlet pipe(s), and the reflux windows, such that the water flow internal circulation of the whole contact reaction tower is realized. The contact reaction tower is sealed in its entirety from the outside environment, and a gas guide pipe is installed at the top of the contact reaction tower.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: April 21, 2015
    Assignee: Nanjing University
    Inventors: Hongqiang Ren, Ke Xu, Lili Ding, Xinkun Ren, Yanru Wang
  • Patent number: 8709963
    Abstract: A molecular sieve including a basic skeleton of a molecular sieve and magnesium and phosphorus compounds as functional materials supported on the inner surface of the basic skeleton. A method of preparation of a modified molecular sieve including (1) dissolving a magnesium salt in water to obtain a magnesium salt solution; (2) dissolving phosphoric acid in water to obtain a phosphoric acid solution; (3) adding a molecular sieve to the magnesium salt solution, stirring, standing, drying for dehydration, and baking; and (4) adding a modified molecular sieve with supported magnesium compounds obtained from the step (3) to the phosphoric acid solution, stirring, standing, drying for dehydration, and baking to obtain a modified molecular sieve. The modified molecular sieve has high selectivity for ammonia nitrogen in wastewater.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 29, 2014
    Assignee: Nanjing University
    Inventors: Hongqiang Ren, Tao Zhang, Lili Ding
  • Patent number: 8702992
    Abstract: A continuous flow reactor, including a cylindrical coagulation crystallizer, a funnel type protective baffle for static settling, and a conical static settler. A lower end surface of the cylindrical coagulation crystallizer is connected with an upper end surface of the conical static settler, and the funnel type protective baffle for static settling is connected with an inner wall of the cylindrical coagulation crystallizer.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: April 22, 2014
    Assignee: Nanjing University
    Inventors: Hongqiang Ren, Qiucheng Li, Tao Zhang, Lili Ding, Ke Xu, Xinkun Ren
  • Publication number: 20140097137
    Abstract: A coupling bioreactor in the form of a tower type seal structure filled with a suspended carrier. A water inlet pipe, an air inlet pipe, and a first microporous aerator are arranged at the bottom of the coupling reactor. The water inlet pipe is connected to a water distributor. The air inlet pipe is connected to the first microporous aerator. A gas inlet pipe and a second microporous aerator are arranged at the middle part of the coupling bioreactor and are connected with each other. An annular overflow weir is arranged at the upper part of the coupling bioreactor and is connected to a water outlet pipe. A gas outlet pipe is arranged at the top of the coupling bioreactor. The ratio of the height to the diameter of the coupling bioreactor is between 3 and 10.
    Type: Application
    Filed: June 5, 2013
    Publication date: April 10, 2014
    Inventors: Hongqiang REN, Ke XU, Lili DING, Jinju GENG
  • Patent number: D824357
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: July 31, 2018
    Assignee: SHENZHEN WANLING ELECTRONIC CO., LTD.
    Inventor: Lili Ding