Enhanced biological phosphorous (Bio-P) removal process was adapted to membrane bioreactor(MBR). One bench-scale pilot plant (BSP, 200-250L) and two medium-scale pilot plants (2//MSP,1000-3000L each) were operated under several configurations, including pre-denitrification and post-denitrification without addition of carbon source, and two solid retention times (SRT) of 15 and 26d, inparallel to the full-scale Bio-P removal activated sludge plant of Berlin-Ruhleben (12-18d SRT). Thetrials showed that efficient Bio-P removal can be achieved with MBR systems, in both pre- and post-denitrification configurations. Bio-P dynamics could be clearly demonstrated through batch-tests, online measurements, profile analyses, P-spiking trials, and mass balances. High P-removalperformances were achieved even with high SRT of 26d (around 9mgP/L was removed withP/TS~2.6%). Under similar operation conditions of sludge age and mass organic load, the MBRsystem achieved slightly higher P-removal than the conventional technology. This was due to therejection of particles and colloids through the microfiltration membrane. When spiking with phosphate,high Bio-P removal of up to 35-40mg/L could be achieved without addition of external carbon source,and P/TS stabilised around 7.5%.

The European Water Framework Directive of 1991, which aim is to limit the discharge of urban rainwater, constrains the cities to improve their sewerage system in order to face such events. The combined sewer overflows are a very sensitive theme in Berlin because of the city’s drink water supply system. The Integrated Sewage Management project, materialized within the Berlin Water Competence Center, aims to optimize the network thanks to hydraulic and pollution modelling. The first step of this study is to model a pilot catchment’s area, thanks to the Hydroworks DM software. Beyond the network constitution, a measurement campaign is realized to calibrate the model, for hydraulic as well as for pollution processes. This has to be done for both dry and rain weather. A first calibration is made possible by the results of dry weather measurements. The analysis of rain weather measurements will allow the validation of the model to be done, and its transposition to the other Berlin catchment’s areas.