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Selbstgezeichnet von Konwiki, 2003, GNU FDL Beispielhaftes Fließschema einer Abwasserreinigungsanlage nach dem Belebungsverfahren. Dieses zeigt eine Anlage ohne Vorklärbecken und mit biologischer Stufe (Belebungsbecken/Nachklärbecken). Der Schlamm wird in der biologischen Stufe aerob stabilisiert. Dies erfordert eine entsprechend niedere Belastung der Anlage und eine lange Aufenthaltszeit des Schlammes im System (größer 25 Tage). Die Entwässerung des Schlammes kann in einer Schlammpresse vorgenommen werden. Die Entsorgung des Schlammes kann durch Deponierung oder durch (wenn die Qualität entspricht) landwirtschaftlichte Verwertung erfolgen.

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