Scenario Descripon Scenario drawing S01 Exisng BF treatment train S02 Exisng MAR treatment train S1 Base scenario- solely technical soluon S2 BF + UF S3 for comparison with 02 S4 for comparison with 02 Waterworks Dresden Hosterwitz DREWAG Netz GmbH Rüdiger Opitz Water works: Constructed in 1908 with enlargements in 1928 – 32 and 1983 Water abstracon: · 3 siphon pipes with 111 siphon wells · 36 separate single operated wells Water treatment (daily producon: 72,000 m 3 /d): · 5 operaonal infiltraon basins (Fig. 1) · 2 sedimentaon basins Fig. 1: Aerial view of Waterworks Dresden-Hosterwitz AquaNES Site 2 (WP1-Bank Filtraon) Cl 2 Elbe River Dual-media filter Aeraon/deacidificaon Granular acvated carbon (GAC) filter Distribuon network Disinfecon NaOH pH- adjustment Pure water tank Well galleries Infiltraon Aquifer Coagulaon/sedimentaon Alum Filter backwash Filter backwash Coarse and fine screen Direct surface water abstracon Fig. 2: Schemac treatment train Two separate treatment trains: Consists of 2 treatment trains (Fig. 2) RBF treatment train: · BF is main treatment step before aeraon, GAC and Cl 2 MAR treatment train: · Direct surface water abstracon + pre-treatment · Infiltraon and subsequent soil passage is main treatment step before aeraon, GAC and Cl 2 Siphon Well Studies & Evaluaon of Energy Savings What will be done: Invesgaon of exisng wells Pumping tests and evaluaon of operaonal data Energy measurements using data loggers Mobile ultrasonic flow meter measurements Diver data logger for water level measurements Goals: Evaluaon of energy saving through siphon wells (Fig. 3) Validaon of SIPHON design tool Life cycle assessment Site Descripon Ultrafiltraon Pilot Unit UF-pilot set-up: Flow rate Q= 0.5 – 1.5 m 3 /h Pilot design preferable as mobile unit BF supply from single operated wells (S2) Separate Mn 2 + /Fe 2 + -oxidaon/removal Aim: Evaluate benefits of combined treatment Series of test with different feed water quality (Tab. 1) S1 & S2 are to invesgate combined treatment benefits S3 & S4 are to evaluate effecveness of S02 Target parameters: Removal rates for pathogens and micropollutants Energy consumpon Pressure loss across membrane Membrane fouling Tab. 1: UF-pilot scenarios Fig. 3: Siphon well system Acknowledgement The AquaNES project has received funding from the European Union’s Horizon 2020 research and innovaon programme under grant agreement no. 689450 Siphon pipe Vacuum pump Collector shaſt Vercal wells Pressure head Stac groundwater level MAR-Well MAR-Well BF-Well River Elbe Post- treatment GAC Cl 2 Post- treatment GAC Cl 2 Coagulaon/ sedimentaon Alum River Elbe Dual- media filtraon Alum UF-filtraon River Elbe Post- treatment GAC Cl 2 Post- treatment GAC Cl 2 Post- treatment GAC Cl 2 Coagulaon/ sedimentaon Alum River Elbe Alum BF-Well River Elbe UF-filtraon UF-filtraon UF-filtraon Post- treatment GAC Cl 2 Coagulaon/ sedimentaon Alum River Elbe Dual- media filtraon