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

Verband Schweizer Abwasser- und Gewässerschutz- fachleute Association suisse des professionnels de la protection des eaux Associazione svizzera dei professionisti della protezione delle acque Swiss Water Association

Full-scale micropollutant removal from municipal wastewater in Switzerland

Aline Meier, Julie Grelot, Pascal Wunderlin, Christian Abegglen VSA-Platform «Process Engineering Micropollutants» EU Workshop on emerging pollutants Brussels, 24.10.2018

Source: http://www.arathunersee.ch/anlage/pak/

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)

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Background

Population densitiy Effects on aquatic systems Micropollutants in drinking water

Pressure on surface water bodies has risen:

• Population growth
• More and more chemicals in

use

• Climate change (lower water

discharge)

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Strategy: Focused upgrade – where it is most useful

• WWTP > 8’000 i. discharging into stretches with inadequate

dilution (>10% share of wastewater, not treated against mp)

• WWTP > 24’000 inhabitants discharging into lakes
• WWTP > 8’000 i. in special hydrogeological situations
• Large WWTP > 80’000 i.

Quality contr Quality control of drinking rinking wat ater er resour resources ces Pr Protection ection of

• f sensitiv

sensitive w e water bodies

• dies

Load-reduction Load-reduction + «up-stream» + «up-stream» responsability responsability

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Political approach

2010 2011 2012 2013 Proposal for changes in

• rdinance

public consultation 80% welcome measures demand for financing solution Proposal for law change public consultation 75% acceptance by parlament 2009 2014 Resolution Federal council Law comes into force 2015 Ab 2006 Strategy micropoll Pilot tests

The Swiss governement decided: There is need for action!

EU Workshop on emerging pollutants, 24.10.2018 80% welcome measures and financing solution 2016 5

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)

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Why is surface water protection important to people in Switzerland?

https://www.google.ch/searchlimmatschwimmen

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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

• perating costs)
• Elimination goal: 80% (inflow WWTP – outflow WWTP) of a list of

12 substances 12 substances

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Projects for full-scale realisation in Switzerland

9 activated carbon

• zone

combination

• peration

Planning / construction september 2018 Operation:

• 4 ozonations
• 2 activated carbon

25 other projects ongoing EU Workshop on emerging pollutants, 24.10.2018

EU Workshop on emerging pollutants, 24.10.2018

Recent full-scale realisations in Switzerland

• zonation WWTP Bassersdorf
• zonation WWTP Werdhölzli, Zürich

activated carbon, WWTP Thunersee

Source: ARA Eich, Bassersdorf Source: ERZ Entsorgung Recycling Zürich Source: http://www.arathunersee.ch/anlage/pak

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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)

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VSA-Fachtagung, «Mikroverunreinigungen» 2.- 4. November 2016

Aare 2011

inf info@micr @micropoll.ch poll.ch

Thanks for your attention

www.micropoll.ch

EU Workshop on emerging pollutants, 24.10.2018