公开(公告)号：US20210238075A1

公开(公告)日：2021-08-05

申请号：US17041374

申请日：2020-04-02

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yongzhen Peng ,  Jinjinie Liu ,  Shengjie Qiu ,  Yang Xia ,  Qiong Zhang

IPC: C02F9/00

Abstract: A method for realizing heterotrophic and autotrophic coupling advanced nitrogen removal and simultaneous sludge reduction in an anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) is disclosed. Municipal sewage and sludge fermentation mixture is allowed to simultaneously enter into the AOA-SBR; in the anaerobic stage, the organic matter in the sewage and sludge fermentation mixture is converted into polyhydroxyalkanoates (PHA) and stored in the body; in the aerobic stage, the dissolved oxygen (DO) at 0.5˜1 mg/L is maintained by a real-time control, the aeration time is set for 1˜3 h, and when the mass concentration ratio of NO2−—N to NH4+—N is in a range from 1.5 to 2.0, the aeration is stopped, that is, ammonia-nitrogen is partially converted into nitrite-nitrogen through short-cut nitrification; in the anoxic stage, the remaining ammonia-nitrogen and nitrite-nitrogen undergo anaerobic ammonia oxidation (anammox), and meanwhile the remaining nitrite-nitrogen and nitrate-nitrogen generated by anammox is reduced by denitrifying bacteria to nitrogen to achieve advanced nitrogen removal. A related apparatus is also provided, which simultaneously realizes advanced nitrogen removal of sewage and reduction of sludge.

公开(公告)号：US12240774B2

公开(公告)日：2025-03-04

申请号：US17768668

申请日：2021-07-21

Applicant: Beijing University of Technology

Inventor： Yongzhen Peng ,  Jingang Qiu ,  Qiong Zhang ,  Zhong Wang ,  Hao Jiang ,  Shang Ren

IPC: C02F3/30 ,  C02F101/16 ,  C02F103/06

Abstract: Disclosed are a method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source, belonging to the field of biological treatment of sludge of high ammonia nitrogen wastewater. The mature landfill leachate first enters a PNA-SBR, the reactor operates in an anoxic/anaerobic/oxic (A/A/O) mode, denitrification is performed at an anoxic state; then anaerobic ammonia oxidation is performed at an anaerobic stage to remove part of ammonia nitrogen and nitrite nitrogen; partial nitrification is performed at an oxic stage to remove the ammonia nitrogen; discharged water is pumped into a DN-SBR, meanwhile, an excess sludge fermentation mixture is added, the reactor operates in an anoxic/anaerobic/oxic (A/A/O) mode, organic matters in the sludge fermentation mixture are used for denitrification at an anoxic stage, and meanwhile, microorganisms store an inner carbon source; ammonia nitrogen brought by the fermentation mixture is removed at an anaerobic stage; and denitrification is performed through the inner carbon source at an oxic stage. The remarkable sludge reduction effect is achieved while a removal rate of TN achieves 96.0%, and the method and the device are suitable for advanced removal of the high ammonia nitrogen wastewater.

公开(公告)号：US11319230B2

公开(公告)日：2022-05-03

申请号：US17041365

申请日：2020-04-02

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yongzhen Peng ,  Xinjie Gao ,  Zaizhou Xu ,  Xiyao Li ,  Qiong Zhang

IPC: C02F3/30

Abstract: An apparatus for treating municipal sewage by anaerobic/aerobic/anoxic (AOA) [1] process via simultaneous endogenous partial [2] denitrification coupled with anammox in anoxic zone is disclosed. The apparatus mainly includes a raw water tank (1) for sewage, an AOA reactor (2) and a sedimentation tank (3), the sludge flows back from the bottom of the sedimentation tank (3) to the anoxic zone (2.4) and the anaerobic zone (2.2) respectively, and biofilm filler is added to the anoxic zone (2.4). The sewage enters the AOA reactor (2), and the intracellular carbon source is stored in the anaerobic zone (2.2) to remove the organic matter in the raw water. Then it enters the aerobic zone (2.3) for nitrification, and the generated nitrate-nitrogen enters the anoxic zone (2.4) for endogenous partial denitrification. The filler in the anoxic zone (2.4) uses the generated nitrite-nitrogen by endogenous partial denitrification and the remaining ammonia-nitrogen in the raw water to perform anammox reaction. The generated nitrate-nitrogen can be further removed by endogenous denitrification in the anoxic zone (2.4). Endogenous partial denitrification coupled with anammox is used for nitrogen removal in the anoxic zone (2.4), which can reduce the requirement of aeration in the aerobic zone (2.3) and the carbon sources in the anoxic zone (2.4), and suitable for low C/N ratio municipal sewage treatment. A method for treating municipal sewage by AOA process via endogenous partial denitrification coupled with anammox in anoxic zone is also provided.

公开(公告)号：US20250136486A1

公开(公告)日：2025-05-01

申请号：US17631420

申请日：2021-07-21

Applicant: Beijing University of Technology

Inventor： Yongzhen Peng ,  Yueru Zhao ,  Qiong Zhang ,  Xiyao Li

IPC: C02F3/30 ,  C02F3/34 ,  C02F101/16

Abstract: A biological treatment of sewage device and method for realizing advanced nitrogen removal of domestic sewage by half partical nitrification-anammox coupled with sulfur autotrophic denitrification. The device includes a raw water tank, a half partical nitrification reactor, a regulating water tank and an anammox coupled denitrification reactor. The domestic sewage enters the half partical nitrification reactor, a mass concentration ratio of NO2−—N to NH4+—N in effluent water is 1-1.32 through real-time control, and then the effluent water enters the intermediate water tank. After it enters the upflow anammox coupled with autotrophic denitrification granular sludge reactor, the synergistic reaction of anammox and sulfur autotrophic denitrification in the reactor achieves the nitrogen removal. The device and the method improve denitrification efficiency by making full use of the synergistic effect between microorganisms, thereby realizing high-efficiency and energy-saving advanced nitrogen removal of municipal sewage.

公开(公告)号：US20210246057A1

公开(公告)日：2021-08-12

申请号：US17041365

申请日：2020-04-02

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yongzhen Peng ,  Xinjie Gao ,  Zaizhou Xu ,  Xiyao Li ,  Qiong Zhang

IPC: C02F3/30

Abstract: An apparatus for treating municipal sewage by anaerobic/aerobic/anoxic (AOA) [1] process via simultaneous endogenous partial [2] denitrification coupled with anammox in anoxic zone is disclosed. The apparatus mainly includes a raw water tank (1) for sewage, an AOA reactor (2) and a sedimentation tank (3), the sludge flows back from the bottom of the sedimentation tank (3) to the anoxic zone (2.4) and the anaerobic zone (2.2) respectively, and biofilm filler is added to the anoxic zone (2.4). The sewage enters the AOA reactor (2), and the intracellular carbon source is stored in the anaerobic zone (2.2) to remove the organic matter in the raw water. Then it enters the aerobic zone (2.3) for nitrification, and the generated nitrate-nitrogen enters the anoxic zone (2.4) for endogenous partial denitrification. The filler in the anoxic zone (2.4) uses the generated nitrite-nitrogen by endogenous partial denitrification and the remaining ammonia-nitrogen in the raw water to perform anammox reaction. The generated nitrate-nitrogen can be further removed by endogenous denitrification in the anoxic zone (2.4). Endogenous partial denitrification coupled with anammox is used for nitrogen removal in the anoxic zone (2.4), which can reduce the requirement of aeration in the aerobic zone (2.3) and the carbon sources in the anoxic zone (2.4), and suitable for low C/N ratio municipal sewage treatment. A method for treating municipal sewage by AOA process via endogenous partial denitrification coupled with anammox in anoxic zone is also provided.