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wetsus
discover day

Wetsus Discover Day, the annual members-only congress on Thursday, 27 November 2025, offers a chance to reconnect with the Wetsus network, explore innovative projects by company members and PhD researchers, discover our European collaborations, and meet PhD researchers advancing water technology. Our keynote speaker, Willem Ferwerda, founder of Commonland, will encourage reflections on how your organization can integrate restoration to preserve shared resources. Following his keynote, Wetsus PhD researchers and industry partners will co-present on a range of cutting-edge research themes. Please register below before 21 November to confirm your participation. Wetsus Discover Day is open for employees from all our (regular and platform) participants from companies and universities.

Program:
10:30 – 11:00    Welcome, coffee
11:00 – 12:00    Laboratory tour
With highlights of natural flocculants, microalgae, and natural water production.

12:00 – 13:00    Lunch & Discovery showcases
Showcases include European-funded projects in which Wetsus is involved: research training (EMPOWER MSCA CO-FUND), carbon neutrality (ConsenCUS), water quality and monitoring (H2OforAll and UrbanM2O), and groundwater and soils (NINFA and SOILCRATES).

13:00 – 13:30    Welcome & Wetsus Update by program director Jan Post

13:30 – 13:40    New Wetsus participants introduction pitches

13:40 – 14:30 Keynote Lecture by Willem Ferwerda, founder of Commonland
From degradation to restoration: experiences with a systems  approach
Willem works globally on landscape-scale restoration that integrates biodiversity, climate, agriculture, business, and communities. He developed the 4 Returns framework, linking ecological recovery with social and economic benefits. Trained in biology, tropical ecology, and agriculture in Amsterdam and Colombia. As Executive Director of IUCN Netherlands in 2000 – 2012, he supported over 1,500 projects in 40 countries and built partnerships between business and conservation. Today, he advises international initiatives, promoting a “holistic restoration industry” that unites heart, mind, and hands to heal landscapes.

14:30 – 14:35    Music performance

14:35 – 15:00   Break

15:00 – 16:00    Parallel sessions 1
1.1 Smart separation: Engineering interfaces for selectivity and sustainability — introduced by Antoine Kemperman, Scientific Advisor
• High-recovery and Chemical-free desalination via Electrodialysis Metathesis by Kecen Li (Wetsus, WUR)
• Coalescence stability of emulsion droplets stabilized using potato proteins by Arunitha Sreeprakash (Wetsus, UT)
• Crosslinked polyelectrolyte multilayer coatings: selective nanofiltration under harsh conditions by Xiao Zhang (Wetsus, UT)
• Teijin’s membrane technology for filtration applications from drinking water to the industrial usages by Akihisa Nomura (Teijin, Sustainable Carbon Cycle theme)

1.2 Beneath the surface: Regenerative practices for soil and groundwater health  — introduced by Chris Schott, Scientific Project Manager
• Pesticides past, present, and future: insights from science and practice for healthier soils by Marija Gadzimuradova (Wetsus, WUR) and Sytze Keuning (Bioclear Earth, Soil theme)
• Making manure an opportunity: from excess residue to soil value by Lourens van Langeveld (Wetsus, WUR) and Joost Mulder (Mulder Agro, Soil theme)

16:00 – 16:15   Break

16:15 – 17:15 Parallel sessions 2
2.1 Waste to worth: Insights of resource recovery from the IWA Resource Recovery — introduced by Thomas Prot, Scientific Project Manager
• Fantastic vivianite and where to form it: Potentials in iron mediated phosphate recover by Sophie Banke (Wetsus, TU Delft)
• An invisible resource: Heat recovery from greywater by Shuoguang Yang (Wetsus, RuG)
• Improving the selectivity and efficiency of biological gas desulfurization under halo-alkaline conditions by Joris Bergman (Wetsus, WUR)
• Resource recovery choices: Viability, value, and the carbon footprint by Jouke Boorsma (AquaMinerals, Phosphate Recovery theme)

2.2 Safe delivery: Innovations in water distribution and biofilm control introduction — introduced by Inez Dinkla, Monitoring & Quality Theme Coordinator
• Strategies for biofilm control in drinking water distribution by Pamela Mousa & Rodrigo Nobre (Wetsus, RuG, UT) and Anneke Roosma (Vitens, Biofilms theme)
• A collaborative effort towards better leak detection in plastic pipes by Ruixuan Qi (Wetsus, RuG) and Erik Driessen (Acquaint, Smart Water Grids theme).

17:15 – 18:00  Borrel & Discovery showcases

18:00 – 19:30 Buffet dinner

Online registration is now closed. You can still attend, but please register on-site.

Towards an economy of value preservation | By Niels Faber

Abstract

The realisation of a circular economy has thus far unfolded under the assumption that it would fit within existing economic arrangements. In practice, we witness many circular initiatives struggling to give shape to their ambitions, let alone develop to maturity. These past months, various material recycling organisations terminated their activities, seeing virgin alternatives from other parts of the world flooding the market at prices against they cannot compete. If the transition towards a circular economy (i.e. an economy of value preservation) is to be taken seriously, a new perspective on value in our economic system seems unavoidable, as the rewriting of the rules of the economic game. At this moment, current perceptions of value stand in the way of this transition both at micro as well as macro levels. Several contours for a collective exploration of new directions of value and economic configuration that foster circular transition will be addressed.

Searching Innovation for the Common Good | By Cees Buisman

Abstract

In his key note he will conclude after a life of innovations that it is impossible that humanity will stay within the save planetary boundaries with innovation only. We should be more critical about the behaviour of the rich population in the world and more critical about new innovations that prove to be dangerous, like the PFAS crisis shows at this moment. In his keynote he will investigate how to look at the world that can stay within the save planetary boundaries, how should we change ourselves? It is clear if we only talk about the words of science and systems we miss the essential words of how we should cooperate and change ourselves. And his search for coherent save innovations. Which innovations will be save and will lead to a fair and sustainable world? And will lead to a world we want to live in.

Future-fit economic models: What do they have in common – how can they join forces? | By Christian Felber

Abstract

There is a growing number of new sustainable, inclusive, cohesive, participatory, just and humane economic models. A possible next step in the discourse about them is the comparative analysis in order to find out key commonalities, potential synergies, and “requirements” for a future-fit economic model. The author and initiator of the Economy for the Common Good provides an overview of these „new sustainable economic models“ and compares them according to underlying values, principles, and practical ways of implementation. The keynote addresses the cooperative spirit of the conference and prepares the ground for its public highlight on the eve of June 3rd, the round table with representatives of diverse future-fit economic models.

The era of postgrowth economics | By Matthias Olthaar

Abstract

The scientific debate on whether economies should always continue to grow increasingly becomes a political and societal debate. On the one hand further growth for the most affluent countries seems neither possible nor valuable, but on the other hand there is still lack of understanding and knowledge what a non-growing economy should look like and could best be governed. In this lecture we discuss various policy measures that can be realistically implemented, take into account government finances and aim at a higher quality of life despite a non-growing economy.

Democratic principles for a sustainable economy | By Lisa Herzog

Abstract

Democracy is under pressure, and less and less able to stir the economy into a sustainable direction. Therefore, to stabilize democracy and to make possible the socio-ecological transformation of the economy, democratic principles need to be implemented directly in the economy. This is not only a matter of morality, but also has practical advantages. Democratizing the economy can increase legitimacy and take advantage of the “knowledge of the many” to accelerate the transformation. Democratic practices, especially deliberation, allow bringing together different forms of knowledge, which is crucial for the local implementation of principles of social and ecological sustainability. This talk explores what this idea means in more concrete terms, from democratic participation in the workplace to the democratization of time.

Market, state, association, and well-being. An historical approach | By Bas van Bavel

Abstract

Over the past decades, markets have conventionally been seen as the best instrument to stimulate economic growth and enhance prosperity and well-being. The automatic link between markets and economic growth is increasingly questioned, however, as well as the automatic link between economic growth and enhancement of well-being. This has led to attempts to capture well-being development more directly than through GDP per capita figures and has produced a more variegated picture of well-being growth. Also, this has led to a shift of focus to other coordination systems than the market, as primarily the state but increasingly also the association. Analyses of the historical record suggest that especially the latter could be a vital component in future well-being.