Patents by Inventor Qiujun YAO

Qiujun YAO 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).

  • Method for deep treatment of household waste leachate by biochemical process
    Patent number: 12338148
    Abstract: A method for deep treatment of household waste leachate by a biochemical process is provided, including: arranging one anoxic tank and two aerobic tanks in series; introducing the household waste leachate into the primary anoxic reactor, and diluting the household waste leachate to an concentration acceptable to microorganisms; introducing the diluted household waste leachate into the primary aerobic reactor, and subjecting the diluted household waste leachate to an pre-nitrification reaction to obtain a reactant; introducing the reactant into the secondary aerobic reactor, and subjecting the reactant to a main nitrification reaction to convert ammonia nitrogen into nitrate nitrogen and nitrite nitrogen by nitrification of nitrobacteria; refluxing the nitrification liquid to the primary anoxic reactor, converting the nitrate nitrogen and nitrite nitrogen into nitrogen gas by denitrobacteria in the primary anoxic reactor, and discharging the nitrogen gas into atmosphere, thereby finishing an denitrification pr
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: June 24, 2025
    Assignees: Shanghai Environmental & Sanitary Engineering Design Institute Co., Ltd., Ruoshui (Shanghai) Environmental Technology Co., Ltd.
    Inventors: Shengdong Wang, Jun Tai, Zhenwei Xu, Wentao Luo, Li Wang, Qiujun Yao
  • METHOD FOR DEEP TREATMENT OF HOUSEHOLD WASTE LEACHATE BY BIOCHEMICAL PROCESS
    Publication number: 20230002262
    Abstract: A method for deep treatment of household waste leachate by a biochemical process is provided, including: arranging one anoxic tank and two aerobic tanks in series; introducing the household waste leachate into the primary anoxic reactor, and diluting the household waste leachate to an concentration acceptable to microorganisms; introducing the diluted household waste leachate into the primary aerobic reactor, and subjecting the diluted household waste leachate to an pre-nitrification reaction to obtain a reactant; introducing the reactant into the secondary aerobic reactor, and subjecting the reactant to a main nitrification reaction to convert ammonia nitrogen into nitrate nitrogen and nitrite nitrogen by nitrification of nitrobacteria; refluxing the nitrification liquid to the primary anoxic reactor, converting the nitrate nitrogen and nitrite nitrogen into nitrogen gas by denitrobacteria in the primary anoxic reactor, and discharging the nitrogen gas into atmosphere, thereby finishing an denitrification pr
    Type: Application
    Filed: August 31, 2022
    Publication date: January 5, 2023
    Inventors: Shengdong WANG, Jun TAI, Zhenwei XU, Wentao LUO, Li WANG, Qiujun YAO