Full-scale micropollutant removal from municipal wastewater in - PowerPoint PPT Presentation

Associazione svizzera Verband Schweizer des professionnels Association suisse dei professionisti Gewässerschutz- della protezione de la protection Abwasser- und Swiss Water delle acque Association fachleute des eaux Full-scale micropollutant removal from municipal wastewater in Switzerland Aline Meier, Julie Grelot, Pascal Wunderlin, Christian Abegglen VSA-Platform «Process Engineering Micropollutants» Source: http://www.arathunersee.ch/anlage/pak/ EU Workshop on emerging pollutants Brussels, 24.10.2018

Background Several internatinal research studies Large research projects in Switzerland: «Fischnetz» «Fischnetz»: showed that endocrine disruptive substances reach • impact limit on fish reproduction  Cocktail of mp seems to be problematic (1998 – 2003, 77 subprojects, f.ex. Suter and Holm 2004) NFP50 NFP50: national research program, strategies to evaluate risks of • stress/pollution of humans and animals through endocrine disruptive sustances (2003 – 2007, 31 projects) 2 EU Workshop on emerging pollutants, 24.10.2018

Background Effects on aquatic systems Micropollutants in drinking water Pressure on surface water bodies Population densitiy has risen: • Population growth • More and more chemicals in use • Climate change (lower water discharge) 3 EU Workshop on emerging pollutants, 24.10.2018

Strategy: Focused upgrade – where it is most useful Pr Protection ection of of sensitiv sensitive w e water bodies odies • WWTP > 8’000 i. discharging into stretches with inadequate dilution (>10% share of wastewater, not treated against mp) Quality contr Quality control of drinking rinking wat ater er resour resources ces • WWTP > 24’000 inhabitants discharging into lakes • WWTP > 8’000 i. in special hydrogeological situations Load-reduction Load-reduction + «up-stream» + «up-stream» responsability responsability • Large WWTP > 80’000 i. EU Workshop on emerging pollutants, 24.10.2018 4

Political approach The Swiss governement decided: There is need for action! Proposal for changes in Proposal for ordinance law change Resolution  public  public Federal consultation consultation council Ab 2006 2009 2010 2011 2012 2013 2014 2015 2016 Strategy micropoll 80% welcome 80% welcome 75% Law comes Pilot tests measures measures and acceptance by into force parlament demand for financing financing solution solution 5 EU Workshop on emerging pollutants, 24.10.2018

Political approach • Change of water protection law: Collaboration with cantonal authorities, working groups with all the relevant stakeholders (multidisciplinary) • Platform to ensure knowledge transfer • High acceptance (Logar et al, 2014) 6 EU Workshop on emerging pollutants, 24.10.2018

Why is surface water protection important to people in Switzerland? https://www.google.ch/searchlimmatschwimmen 7 EU Workshop on emerging pollutants, 24.10.2018

Legal basis – financing and control • Total investment costs: about 1.2 billion Euros • Financing: Polluter pays Principle:  Governement levies a wastewater tax for WWTP since 1.1.2016 (about 8 euros per person and year) till 2040  Selected WWTPs get paid 75% of investment costs for measures against micropollutants  Upgraded WWTPs do not have to pay wastewater tax (higher operating costs) • Elimination goal: 80% (inflow WWTP – outflow WWTP) of a list of 12 substances 12 substances EU Workshop on emerging pollutants, 24.10.2018 8

Projects for full-scale realisation in Switzerland activated ozone combination carbon Operation: operation • 4 ozonations Planning / • 2 activated carbon construction 25 other projects ongoing september 2018 EU Workshop on emerging pollutants, 24.10.2018 9

Recent full-scale realisations in Switzerland Source: ARA Eich, Bassersdorf ozonation WWTP Bassersdorf Source: ERZ Entsorgung Recycling Zürich ozonation WWTP Werdhölzli, Zürich activated carbon, WWTP Thunersee Source: http://www.arathunersee.ch/anlage/pak 10 EU Workshop on emerging pollutants, 24.10.2018

Interim Conclusion • All relevant stakeholders worked together • Solution for financing was found • High acceptance • The platform as a science-practice-interface can support efficient realisation Current focus: • Technologies are still new: continuous learning process (pilot tests, process optimisation) • rational process selection (ozone / activated carbon) EU Workshop on emerging pollutants, 24.10.2018 11

Aare 2011 Thanks for your attention www.micropoll.ch inf info@micr @micropoll.ch poll.ch VSA-Fachtagung, «Mikroverunreinigungen» 2.- 4. November 2016 EU Workshop on emerging pollutants, 24.10.2018