- 专利标题: Method for advanced nitrogen and phosphorus removal in sewage treatment
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申请号: US17488420申请日: 2021-09-29
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公开(公告)号: US12103879B2公开(公告)日: 2024-10-01
- 发明人: Wensheng Li , Jianmin Zhang , Jun Yang , Weihua Chen , Zhishuai Wang , Hongchang Zhou , Peng Deng , Jing Liao
- 申请人: YUNNAN HEXU ENVIRONMENTAL TECHNOLOGY CO., LTD.
- 申请人地址: CN Yunnan
- 专利权人: YUNNAN HEXU ENVIRONMENTAL TECHNOLOGY CO., LTD.
- 当前专利权人: YUNNAN HEXU ENVIRONMENTAL TECHNOLOGY CO., LTD.
- 当前专利权人地址: CN Dali Bai Autonomous Prefecture
- 优先权: CN 1910251280.6 2019.03.29
- 主分类号: C02F3/30
- IPC分类号: C02F3/30 ; C02F1/00 ; C02F1/32 ; C02F1/50 ; C02F3/10 ; C02F101/10 ; C02F101/16
摘要:
A method for advanced nitrogen and phosphorus removal in sewage treatment includes the following steps: feeding raw water and return sludge into a pre-denitrification zone for denitrification; allowing a sludge-containing mixed liquor discharged from the pre-denitrification zone to enter an anaerobic zone to undergo a biological phosphorus removal reaction; allowing a sludge-containing mixed liquor discharged from the anaerobic zone and a return nitrification liquid to enter an anoxic zone for denitrification; allowing a sludge-containing mixed liquor discharged from the anoxic zone to enter an aerobic zone for nitrification and excessive phosphorus uptake, and allowing part of a nitrification liquid to be returned to the anoxic zone; allowing a sludge-containing mixed liquor discharged from the aerobic zone to enter a sedimentation zone for separation; passing a resulting supernatant through a biological filtration zone; returning part of resulting sludge to the pre-denitrification zone; and the like.
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