Sewage plant

The invention discloses a sewage plant. The sewage plant comprises a pretreatment unit (1) and a biological treatment unit arranged in sequence, wherein the biological treatment unit comprises an anaerobic tank (21), an anoxic tank (22), an aerobic tank (23) and a secondary settling tank (7); and pr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHAN WEIDONG, HU YONGKUI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a sewage plant. The sewage plant comprises a pretreatment unit (1) and a biological treatment unit arranged in sequence, wherein the biological treatment unit comprises an anaerobic tank (21), an anoxic tank (22), an aerobic tank (23) and a secondary settling tank (7); and pretreated sewage treated by the pretreatment unit (1) passes through a multi-point water inlet channel (5) and is introduced into the anaerobic tank (21), the anoxic tank (22) and the aerobic tank (23) in a controlled mode. The sewage plant has a dry season operation mode and a rainy season operationmode, and in the dry season operation mode, the pretreated sewage treated by the pretreatment unit (1) passes through the multi-point water inlet channel and is only introduced into the anaerobic tank; and in the rainy season operation mode, the pretreated sewage treated by the pretreatment unit passes through the multi-point water inlet channel and is simultaneously introduced into the anaerobictank, the anoxic tank and