Method and apparatus for treating municipal sewage by AOA process via endogenous partial denitrification coupled with anammox in anoxic zone

    公开(公告)号:US11319230B2

    公开(公告)日:2022-05-03

    申请号:US17041365

    申请日:2020-04-02

    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.

    DEVICE AND METHOD FOR REALIZING ADVANCED NITROGEN REMOVAL OF DOMESTIC SEWAGE VIA TWO STAGE PARTICAL NITRIFICATION-ANAMMOX COUPLED WITH SULFER ANTOTROPHIC DENITRIFICATION

    公开(公告)号:US20250136486A1

    公开(公告)日:2025-05-01

    申请号:US17631420

    申请日:2021-07-21

    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.

    METHOD AND APPARATUS FOR TREATING MUNICIPAL SEWAGE BY AOA PROCESS VIA ENDOGENOUS PARTIAL DENITRIFICATION COUPLED WITH ANAMMOX IN ANOXIC ZONE

    公开(公告)号:US20210246057A1

    公开(公告)日:2021-08-12

    申请号:US17041365

    申请日:2020-04-02

    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.

Patent Agency Ranking