Patents by Inventor Xuejun BI

Xuejun BI 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).

  • Biological nitrogen removal method based on multistage feeding and multistage anoxic/aerobic chambers for wastewater treatment at low temperature
    Patent number: 11981592
    Abstract: A biological nitrogen removal method based on multistage feeding and anoxic/aerobic chambers for adopting a constant flow operation mode, enabling wastewater subjected to primary treatment to enter a first-stage and a second-stage A/O reaction units from two position points; lifting and refluxing an effluent to an influent end of the first-stage units; lifting and refluxing an effluent to an influent end of the second-stage units; and clarifying, separating and discharging an effluent from an outlet end of a third-stage A/O reaction unit. The wastewater treatment mode combines a process based on two-stage wastewater feeding and three-stage anoxic/aerobic chambers with biofilms in different reaction zones, =optimizing and controlling a reflux ratio of each segment according to an amount of organic matters available for denitrification in influent, reducing the impact of hydraulic loading at the cross section in the reactors while removing organic matters and nitrogen-containing pollutants at a low temperature.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: May 14, 2024
    Assignee: QINGDAO UNIVERSITY OF TECHNOLOGY
    Inventors: Xuejun Bi, Xiaolin Zhou, Peng Song, Xiaodong Wang
  • BIOLOGICAL NITROGEN REMOVAL METHOD BASED ON MULTISTAGE FEEDING AND MULTISTAGE ANOXIC/AEROBIC CHAMBERS FOR WASTEWATER TREATMENT AT LOW TEMPERATURE
    Publication number: 20220306504
    Abstract: A biological nitrogen removal method based on multistage feeding and anoxic/aerobic chambers for adopting a constant flow operation mode, enabling wastewater subjected to primary treatment to enter a first-stage and a second-stage A/O reaction units from two position points; lifting and refluxing an effluent to an influent end of the first-stage units; lifting and refluxing an effluent to an influent end of the second-stage units; and clarifying, separating and discharging an effluent from an outlet end of a third-stage A/O reaction unit. The wastewater treatment mode combines a process based on two-stage wastewater feeding and three-stage anoxic/aerobic chambers with biofilms in different reaction zones, =optimizing and controlling a reflux ratio of each segment according to an amount of organic matters available for denitrification in influent, reducing the impact of hydraulic loading at the cross section in the reactors while removing organic matters and nitrogen-containing pollutants at a low temperature.
    Type: Application
    Filed: October 27, 2020
    Publication date: September 29, 2022
    Applicant: QINGDAO UNIVERSITY OF TECHNOLOGY
    Inventors: Xuejun BI, Xiaolin ZHOU, Peng SONG, Xiaodong WANG