公开(公告)号：US20240208846A1

公开(公告)日：2024-06-27

申请号：US17919919

申请日：2021-10-29

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yongzhen PENG ,  Haoran LIANG ,  Xiyao LI ,  Zhong WANG

IPC: C02F3/30 ,  C02F103/06

CPC classification number: C02F3/307 ,  C02F2103/06 ,  C02F2209/06

Abstract: A method for treating middle and mature landfill leachate by endogenous denitrification combined autotrophic nitrogen removal process, which belongs to a field of biological treatment of high-ammonia-nitrogen wastewater. The middle and mature landfill leachate firstly enters a PN/ED-SBR reactor to perform in an A/O (anaerobic/aerobic) mode, microorganisms in an anaerobic stage absorb an external carbon source and store the external carbon source as an intracellular carbon source, partial nitrification is performed in the aerobic stage, and the ammonia nitrogen in inlet water is completely oxidized into nitrite nitrogen; after the reaction is finished, an effluent containing nitrite nitrogen and middle and mature landfill leachate are mixed and then enter an AMOX-UASB reactor to perform anammox reaction, the effluent of the reactor is pumped into the PN/ED-SBR reactor again to perform in the anoxic mode, and oxidized nitrogen is removed through endogenous denitrification.

公开(公告)号：US20230071009A1

公开(公告)日：2023-03-09

申请号：US17983786

申请日：2022-11-09

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Yongzhen PENG ,  Fangzhai ZHANG ,  Zhong WANG ,  Hao JIANG ,  Shang REN ,  Jingang QUI

IPC: C02F3/00 ,  C02F11/02 ,  C02F3/30

Abstract: Disclosed is an apparatus and method for synchronously treating sewage and sludge through a step-feed partial nitrification coupling anaerobic ammonia oxidation process, belonging to the biological treatment field. Ammonia rich landfill leachate is firstly pumped into an aerobic reactor to realize partial nitrification process; exogenous surplus sludge coupling with partial nitrification reactor effluent are input to an anoxic reactor together for achieving integrated fermentation and denitrification process; finally, effluent from the anoxic reactor is pumped into an integrated autotrophic nitrogen removal reactor by a step-feed mode, the integrated reactor contains two main running units of aeration and anoxic stirring, ammonia is oxidized into nitrite in aeration stage, and the generated nitrite and ammonia contained in secondary influent are further removed through anammox process which operates stably and reliably, realizes efficient nitrogen removal from landfill leachate without external carbon source addition, and realizes the purpose of exogenous excess sludge reduction simultaneously.

公开(公告)号：US20240109798A1

公开(公告)日：2024-04-04

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

CPC classification number: C02F3/307 ,  C02F3/303 ,  C02F3/305 ,  C02F2101/163 ,  C02F2209/02 ,  C02F2209/04 ,  C02F2209/06 ,  C02F2209/38

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.