DEVICE FOR ADVANCED NITROGEN AND PHOSPHORUS REMOVAL IN SEWAGE TREATMENT

DEVICE FOR ADVANCED NITROGEN AND PHOSPHORUS REMOVAL IN SEWAGE TREATMENT

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-deni...

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Hauptverfasser: Lv, Zheng, Liu, Ranrong, Zhang, Xin, Li, Wensheng, Li, Yulong, Fang, Yiqiu, Xia, Fei
Format: Patent
Sprache:eng
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CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator Lv, Zheng
Liu, Ranrong
Zhang, Xin
Li, Wensheng
Li, Yulong
Fang, Yiqiu
Xia, Fei
description 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.
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subjects CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title DEVICE FOR ADVANCED NITROGEN AND PHOSPHORUS REMOVAL IN SEWAGE TREATMENT
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