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wetsus congress 2025

Efficiency in Innovation

Monday October 6 and Tuesday October 7, 2025 in De Harmonie, Leeuwarden

Welcome to the Wetsus Congress 2025

Join us on Monday, October 6 and Tuesday, October 7, 2025 at De Harmonie in Leeuwarden for the Wetsus Congress 2025 – a two-day event where scientific excellence meets relevance in water technology. Under the theme “Efficiency in Innovation”, we bring together global experts from academia, industry, government, and young talent to explore cutting-edge solutions that accelerate sustainable water tech development.

The congress will feature inspiring keynote sessions, interactive discussions, and in-depth sessions covering the latest innovations, challenges, and opportunities in water technology.

With a unique mix of science and entrepreneurship, the event offers a platform for knowledge exchange, idea generation, and strategic networking within the heart of Europe’s leading water technology hub, Leeuwarden.

Monday October 6

  • 09:00 – 10:00 Welcome and registration
  • 10:00 – 12:00 Plenary session

    Chair: Johannes Boonstra, Executive Board Wetsus

      • Wetsus Developments, prof.dr.ir. Cees Buisman, Executive Board Wetsus

      • Pernille Weiss-Ehler, Member of Cabinet for Environment, Water Resilience and Competitive Circular Economy, European Commission

      • Drs. Rob van Dongen, General manager BrabantWater NV/Chair TKI Watertechnologie

      • Prof.dr. Rianne Letschert, Chair Advisory Committee National Growth Fund, President of Maastricht University

      • Prof.dr. Gerard van der Steenhoven, Special Advisor of the Dutch Government

    Marcel Mulder Award Ceremony

      • Pitch by dr. Nouran Bahgat , winner of the 2024 Marcel Mulder Award

      • Award 2025, drs. Ed Nijpels, President Supervisory Board Wetsus

  • 12:00 – 14:00 Lunch, visit poster presentations and demonstration floor
  • 14:00 – 16:00 Plenary session

      • Keynote: dr. Kalanithy Vairavamoorthy, Executive Director at International Water Association

      • Examples of innovations driven by UPPWATER

    This session explores how UPPWATER already sparked a range of early-stage innovations aimed at addressing sustainable water challenges. The UPP Water initiative was founded in 2022 and is a key pillar of the Dutch Growth Plan. This program aims to strengthen the innovation, international position and growth of the Dutch water technology sector.  UPPWATER catalyzes new ideas, collaborative approaches and fresh perspectives that pave the way for long-term impact in water technology.

  • 16:00 – 18:00 Networking reception, visit poster presentations

Tuesday October 7

  • 09:30 – 10:00 Welcome and registration
  • 10:00 – 11:00 Plenary session

    Chair: prof.dr.ir. Cees Buisman, Executive Board Wetsus

    TBA

  • 11:00 – 12:30 Parallel sessions
    • 1.1 Can we steer soil microbiomes to engineer nature-based solution for resilient soil-water systems?
    • 1.2 Tackling PFAS challenges with technology innovations and creating market opportunities

      Tackling PFAS challenges with technology innovations and creating market opportunities

      Per- and polyfluoroalkyl substances (PFAS) have emerged as one of the most persistent and pressing environmental contaminants, raising significant concerns for public health, water quality, and regulatory compliance. This session will explore the current landscape of PFAS regulations and market demands, followed by an overview of existing technologies for PFAS removal and destruction, as well as of the available emerging and innovative technological solutions aimed at effectively addressing PFAS contamination. Together, these aspects bring an integrated perspective on the PFAS challenge, offering insights from regulatory, technological, and market viewpoints to inform researchers, policymakers, and industry stakeholders on accelerating effective discussions and sustainable solutions.

      Speaker 1

      Speaker 2

      Speaker 3

      Speaker 4

    • 1.3 Advances in drinking water production & distribution
    • 1.4 The bright and sustainable future of electrodialysis for energy and water solutions
    • 1.5 The new Brazilian sanitation framework: opportunities and experiences from Dutch water technology providers
  • 12:30 – 14:00 Lunch, visit poster presentations and demonstration floor
  • 14:00 – 15:00 Plenary session

    Chair: prof.dr.ir. Cees Buisman, Executive Board Wetsus

    TBA

  • 15:00 – 15:30 Break
  • 15:30 – 17:00 Parallel sessions

    2.1  Micropollutants: tracing, treating, and protecting groundwater

    2.2  Water-Wise Proteins: Navigating the Protein Transition

    2.3  Resourceful dewatering of sludges

    2.4 Tiny bubbles, big impact: innovations in nanobubble water technology

    2.5  H2 from seawater

  • 17:00 – 18:30 Networking reception, poster presentation award ceremony

    Tuesday October 7

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.