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In-situ-Monitoring der Reinigungsleistung großer dezentraler Niederschlagswasserbehandlungsanlagen
(2018)
Große dezentrale Niederschlagswasserbehandlungsanlagen
werden mittels kontinuierlicher Gütemesstechnik hinsichtlich ihrer
Frachtwirkungsgrade an Standorten mit hohem Stoffaufkommen untersucht.
Die Bilanzierung der Zulauf- und Ablauffrachten basiert auf dem Zusammenhang
zwischen den abfiltrierbaren Stoffen (AFS) und der Trübung.
Erste Ergebnisse der Installation der Messtechnik, des Datenmanagements
und Frachtwirkungsgrade werden vorgestellt.
Membrane contactors are a promising alternative for nitrogen removal and recovery from process water compared
to other physicochemical and biological sidestream treatment processes. Münster wastewater treatment plant (WWTP) is the first municipal WWTP in Germany operating a full-scale membrane contactor
system to improve the nitrogen elimination and recovery efficiency. Factors influencing the operation and membrane performance are investigated in an accompanying research project. Additional operational aspects of the applied membrane modules are investigated in detail using a bench-scale membrane contactor. First results of the full-scale application demonstrate a high nitrogen removal efficiency of >95%.
The in-situ performance of large decentralised stormwater treatment systems is investigated by means of continuous turbidity measurements. Turbidity measurements are used as a surrogate to continuously estimate Total Suspended Solid (TSS) concentrations. TSS event loads are calculated at the inlet and outlet of two stormwater treatment systems, which both are installed at the outlet of catchments with high pollution potential. The event-specific performance is defined as ratio between TSS loads of inflow and outflow. Based on measurement data obtained, the overall TSS load retention efficiency is about 32 %.