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c:T42f,Die Mikroorganismen bauen in ihre Zellen im Abwasser gelösten Phosphor als Energieträger ein. Die Bakterien nehmen also einen gewissen Teil des Phosphors auf. Setzt man die Bakterien unter "Stress", so nehmen sie mehr Phosphor auf, als sie eigentlich müssten. Ein ständiger Wechsel vom sauerstoffreichen- zum sauerstoffarmen Bereich, erzeugt diesen benötigten "Stress". Mit dem sauerstoffreichen Nitrifikationsbecken und dem Denitrifikationsbecken, das praktisch keinen gelösten Sauerstoff enthält, sind beide erforderlichen Verhältnisse bereits im Belebungsbecken vorhanden. Gelangt nun die Biomasse mit den Bakterien im ständigen Wechsel vom Nitrifikationsbecken ins Denitrifikationsbecken erhalten somit die Bakterien automatisch diese Stresssituation, die sie brauchen, um mehr Phosphor als nötig aufzunehmen. Dieser Effekt wird auch auf der Kläranlage Miesbach gerne genutzt. Eine gezielt gesteuerte biologische Phosphatentfernung wird jedoch nicht betrieben. 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Eine Reinigung bis auf eine Restverschmutzung von 1 – 2 % erfolgt in diesen beiden parallel laufenden Straßen."}],["$","div",null,{"className":"mb-8 overflow-x-auto","children":["$","table",null,{"className":"w-full border-collapse border-2 border-primary","children":[["$","thead",null,{"children":["$","tr",null,{"className":"bg-primary/10","children":["$","th",null,{"colSpan":2,"className":"border-2 border-primary p-3 text-left font-bold","children":"Daten zur Belebung"}]}]}],["$","tbody",null,{"children":[["$","tr",null,{"children":[["$","td",null,{"className":"border-2 border-primary p-3 bg-primary/5 font-medium","children":"Anzahl:"}],["$","td",null,{"className":"border-2 border-primary p-3","children":"2 unterteilte Rechteckbecken"}]]}],["$","tr",null,{"children":[["$","td",null,{"className":"border-2 border-primary p-3 bg-primary/5 font-medium","children":"Tiefe:"}],["$","td",null,{"className":"border-2 border-primary p-3","children":"6,80 m"}]]}],["$","tr",null,{"children":[["$","td",null,{"className":"border-2 border-primary p-3 bg-primary/5 font-medium","children":"Volumen:"}],["$","td",null,{"className":"border-2 border-primary p-3","children":"2 x 4.900 m³"}]]}],["$","tr",null,{"children":[["$","td",null,{"className":"border-2 border-primary p-3 bg-primary/5 font-medium","children":"Aufenthaltszeit:"}],["$","td",null,{"className":"border-2 border-primary p-3","children":"Ca. 26 Stunden"}]]}]]}]]}]}],["$","div",null,{"className":"mb-8","children":[["$","$L8",null,{"src":"/images/verteilerbauwerk.jpg","alt":"Verteilerbauwerk des Abwassers aus der Vorklärung in die zwei Straßen der Belebung","width":400,"height":300,"className":"w-full max-w-md mx-auto h-auto rounded-lg shadow-md"}],["$","p",null,{"className":"text-sm text-muted-foreground mt-2 text-center","children":"Verteilerbauwerk des Abwassers aus der Vorklärung in die zwei Straßen der Belebung"}]]}],["$","p",null,{"className":"mb-6 leading-relaxed","children":["Das Belebungsbecken ist, abgetrennt durch Tauchwände, unterteilt in unbelüftete und belüftete Zonen, wobei das Abwasser einen zweifachen Wechsel von unbelüfteter zu belüfteter Zone kaskadenartig durchläuft, bevor es in die"," ",["$","$L7",null,{"href":"/klaeranlage/nachklaerung","className":"text-blue-600 hover:underline font-semibold","children":"Nachklärung"}]," ","abgeleitet wird."]}],["$","p",null,{"className":"mb-6 leading-relaxed","children":["Zahllose"," ",["$","$L7",null,{"href":"/klaeranlage/analytik#mikroskop","className":"text-blue-600 hover:underline font-semibold","children":"Mikroorganismen"}]," ","(Bakterien, Ein- und Mehrzeller, Urtierchen etc.) in ihrer Gesamtheit als Belebtschlamm oder Biomasse bezeichnet, nehmen die organischen Schmutzstoffe als Nahrung auf und wandeln diese durch ihre Stoffwechseltätigkeit in einfache organische Verbindungen, mineralische Stoffe und Gase um. Da die Mikroorganismen bei ihren Lebensprozessen Sauerstoff benötigen, muss immer ein genügend hoher Sauerstoffgehalt (1-2 mg/l) in den Belebungsbecken vorherrschen."]}],["$","div",null,{"className":"grid md:grid-cols-2 gap-6 mb-8 items-start","children":[["$","div",null,{"className":"leading-relaxed","children":["$","p",null,{"className":"mb-4","children":"Der Lufteintrag in das Abwasser- / Belebtschlammgemisch erfolgt durch ein am Beckenboden installiertes Rohrleitungssystem, aufgeteilt in 16 Teilabschnitte, das mit insgesamt 2496 Membran-Tellerbelüftern bestückt ist."}]}],["$","div",null,{"children":[["$","$L8",null,{"src":"/images/belueftungsteller.jpg","alt":"Belüftungsteller am Boden de Belebungsbecken","width":600,"height":400,"className":"w-full h-auto rounded-lg shadow-md"}],["$","p",null,{"className":"text-sm text-muted-foreground mt-2 text-center","children":"Belüftungsteller am Boden de Belebungsbecken"}]]}]]}],["$","p",null,{"className":"mb-6 leading-relaxed","children":"Diese Belüfter gewährleisten sowohl einen feinblasigen Lufteintrag als auch die Vermeidung von Ablagerungen und sind, aufgrund einer konstruktiv bedingten Rückschlagventilwirkung auch bei ausgeschalteten Gebläsen verstopfungsfrei."}],["$","div",null,{"className":"mb-8","children":[["$","$L8",null,{"src":"/images/belebungsbecken-aerob.jpg","alt":"Belebungsbecken; belüftete Zone (aerob)","width":600,"height":400,"className":"w-full max-w-xl mx-auto h-auto rounded-lg shadow-md"}],["$","p",null,{"className":"text-sm text-muted-foreground mt-2 text-center","children":"Belebungsbecken; belüftete Zone (aerob)"}]]}],["$","p",null,{"className":"mb-6 leading-relaxed","children":["Die hierfür erforderliche Druckluft erzeugen insgesamt drei"," ",["$","$L7",null,{"href":"/klaeranlage/maschinentechnik","className":"text-blue-600 hover:underline font-semibold","children":"Drehkolbengebläse"}],". Die Regelung des Lufteintrages in die einzelnen Teilabschnitte der Belebung erfolgt mittels 8 Blendenregulierschiebern, die über zugeordnete Sauerstoffmesssonden angesteuert werden."]}],["$","p",null,{"className":"mb-6 leading-relaxed","children":"Durch 2 Absperrklappen in der Hauptluftleitung in der Gebläsestation ist es möglich bei Bedarf eine der beiden Belebungsstraßen stillzusetzen."}],["$","p",null,{"className":"mb-6 leading-relaxed","children":"Eine weitere Aufgabe der Belebtschlammanlage ist die Verminderung der Stickstoff- und Phosphorverbindungen, der sogenannten Nährsalze. Die Reduzierung des Stickstoffgehaltes erfolgt in 2 Stufen:"}],["$","h2",null,{"className":"text-2xl font-bold mb-4","children":"Stickstoffenfernung (Nitrifikation und Denitrifikation)"}],["$","p",null,{"className":"mb-4 leading-relaxed","children":"In der 1. 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Im zweiten Schritt wandeln Nitratbakterien die Nitrit-Ionen zu Nitrat-Ionen."}],["$","div",null,{"className":"grid md:grid-cols-2 gap-6 mb-8 items-start","children":[["$","div",null,{"children":[["$","$L8",null,{"src":"/images/belebungsbecken-anoxisch.jpg","alt":"Belebungsbecken; unbelüftete Zone (anoxisch) mit Rührwerk","width":400,"height":300,"className":"w-full h-auto rounded-lg shadow-md"}],["$","p",null,{"className":"text-sm text-muted-foreground mt-2 text-center","children":"Belebungsbecken; unbelüftete Zone (anoxisch) mit Rührwerk"}]]}],["$","div",null,{"className":"leading-relaxed","children":["$","p",null,{"children":"In der 2. Stufe, der Denitrifikation, in der kein gelöster Sauerstoff vorliegt (anoxisch), wandeln bestimmte Bakterienarten (Denitrifikanten) in ihrer Stoffwechseltätigkeit den Nitratstickstoff in gasförmigen Sauerstoff und Stickstoff um. Der Stickstoff entweicht in die Atmosphäre und der Sauerstoff wird von den Bakterien bei ihren Lebensprozessen weiterverarbeitet."}]}]]}],["$","div",null,{"className":"mb-8","children":[["$","$L8",null,{"src":"/images/nitrifikation-denitrifikation-schema.jpg","alt":"Schematische Darstellung der Nitrifikation und Denitrifikation","width":560,"height":350,"className":"max-w-[560px] mx-auto h-auto rounded-lg shadow-md"}],["$","p",null,{"className":"text-sm text-muted-foreground mt-2 text-center","children":"Schematische Darstellung der Nitrifikation und Denitrifikation"}]]}],["$","p",null,{"className":"mb-8 leading-relaxed","children":"Um eine ausreichende Stickstoffeliminierung zu erreichen, muss aus den Nitrifikationsbecken das nitrathaltige Belebtschlammgemisch mehrmals die Denitrifikationszone durchlaufen. In den unbelüfteten Beckenzonen sorgen insgesamt 4 Stück Vertikal-Rührwerke für die Duchmischung des Belebungsschlammes und für die Vermeidung von störenden Ablagerungen auf dem Beckenboden. Ende 2017 wurden die inzwischen für den Klärprozess unnötigen Rezirkulationspumpen außer Betrieb genommen und statt dessen zwei energieeffiziente Rührwerke eingebaut."}],["$","h2",null,{"id":"bio-p","className":"text-2xl font-bold mb-4","children":"Biologische Phosphorentfernung (Bio-P)"}],["$","p",null,{"className":"mb-4 leading-relaxed","children":"Die biologische Phosphorverminderung erfolgt ebenfalls durch Bakterien, die Phosphate in ihre Körpersubstanz einlagern."}],["$","p",null,{"className":"mb-4 leading-relaxed","children":"Die Auftreten der biologischen Phosphorentfernung (Bio-P) lässt sich folgendermaßen erklären:"}],["$","p",null,{"className":"mb-6 leading-relaxed","children":["$c"," ",["$","$L7",null,{"href":"/klaeranlage/chemische-reinigung/phosphatfaellung","className":"text-blue-600 hover:underline font-semibold","children":"chemische Fällung"}]," ","dem Abwasser entzogen wird. 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