公开(公告)号：US12098086B2

公开(公告)日：2024-09-24

申请号：US17488635

申请日：2021-09-29

申请人： YUNNAN HEXU ENVIRONMENTAL TECHNOLOGY CO., LTD.

发明人： Wensheng Li ,  Ranrong Liu ,  Xin Zhang ,  Zheng Lv ,  Yulong Li ,  Yiqiu Fang ,  Fei Xia

IPC分类号： C02F3/30 ,  C02F3/04 ,  C02F3/10 ,  C02F11/12 ,  C02F101/10 ,  C02F101/16 ,  C02F101/38

CPC分类号： C02F3/308 ,  C02F3/04 ,  C02F3/108 ,  C02F11/12 ,  C02F2101/105 ,  C02F2101/16 ,  C02F2101/38 ,  C02F2203/006 ,  C02F2301/046 ,  C02F2303/04 ,  C02F2303/16 ,  Y02W10/10

摘要： A device for advanced nitrogen and phosphorus removal in sewage treatment includes a pre-denitrification zone, an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, a biological filtration zone, and a clear water zone, where a sludge return system is provided between the pre-denitrification zone and the sedimentation zone; a nitrification liquid return system is provided between the anoxic zone and the aerobic zone; a filler layer is provided in the biological filtration zone, and the filler layer divides a cavity in the biological filtration zone to form an upper water inlet cavity and a lower water outlet cavity; a backwash aeration pipe is provided in the water outlet cavity, and a backwash water outlet is formed in the water inlet cavity; and the backwash water outlet is connected to a sludge concentration and storage tank or the pre-denitrification zone.

公开(公告)号：US20220017394A1

公开(公告)日：2022-01-20

申请号：US17488635

申请日：2021-09-29

申请人： YUNNAN HEXU ENVIRONMENTAL TECHNOLOGY CO., LTD.

发明人： Wensheng Li ,  Ranrong Liu ,  Xin Zhang ,  Zheng Lv ,  Yulong Li ,  Yiqiu Fang ,  Fei Xia

IPC分类号： C02F3/30

摘要： A device for advanced nitrogen and phosphorus removal in sewage treatment includes a pre-denitrification zone, an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, a biological filtration zone, and a clear water zone, where a sludge return system is provided between the pre-denitrification zone and the sedimentation zone; a nitrification liquid return system is provided between the anoxic zone and the aerobic zone; a filler layer is provided in the biological filtration zone, and the filler layer divides a cavity in the biological filtration zone to form an upper water inlet cavity and a lower water outlet cavity; a backwash aeration pipe is provided in the water outlet cavity, and a backwash water outlet is formed in the water inlet cavity; and the backwash water outlet is connected to a sludge concentration and storage tank or the pre-denitrification zone.