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公开(公告)号：US20220017393A1
公开(公告)日：2022-01-20
申请号：US17488420
申请日：2021-09-29
发明人： Wensheng Li , Jianmin Zhang , Jun Yang , Weihua Chen , Zhishuai Wang , Hongchang Zhou , Peng Deng , Jing Liao
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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公开(公告)号：US12103879B2
公开(公告)日：2024-10-01
申请号：US17488420
申请日：2021-09-29
发明人： Wensheng Li , Jianmin Zhang , Jun Yang , Weihua Chen , Zhishuai Wang , Hongchang Zhou , Peng Deng , Jing Liao
IPC分类号： C02F3/30 , C02F1/00 , C02F1/32 , C02F1/50 , C02F3/10 , C02F101/10 , C02F101/16
CPC分类号： C02F3/308 , C02F3/104 , C02F3/109 , C02F3/303 , C02F3/305 , C02F2001/007 , C02F1/32 , C02F1/50 , C02F2101/105 , C02F2101/16 , C02F2201/005 , C02F2301/046 , C02F2303/04 , C02F2303/16
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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