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Each denitrification/Bio-P basin was composed of three cascades (500 m³ each). Optionally the last cascade could be switched into aeration performance. The nitrification basins were permanently aerated with a setpoint for oxygen of 2.0 mg/l. Depending on the ammonium content it was even able to achieve values up to 5.0 mg/l.
Recirculation was achieved with two unregulated circulation pumps per basin. During the operation of the sludge press, the process water was dosed
continuously. The precipitant was dosed according to the phosphate concentration.
been reduced by 61 % and the total phosphor by 70 %. The energy consumption has decreased by 44 %. The optimization costs were able to be refunded by already paid wastewater charges.
Efficiency improvement by intermittent nitrification/denitrification
Zweckverband Abwasser- und Servicebetrieb Mainspitze
Since November 2009
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