People and Projects Solving Freshwater Restoration Challenges

EcoAdvance European Project

Showcase category ➤ DidIt

HUNGARY

Miklós Gyalai-Korpos

Riversaver, Head of Innovation and Technology Unit

Plastic Cup Society


Scientists & Researchers
My Projects

Plastic Cup Society – the Riversaver Toolkit and platform

  • Key project facts
    • 400 tonnes of waste collected from the rivers and floodplains
    • more than 200 tonnes recycled, showing that the waste is value
    • 1200 tonnes waste diverted from the river, showing that prevention is key
    • every summer organizing 2-4 multiple days cleanup races attracting huge number of participants, showing that cleanup can be fun
    • active all-year long engaging schools for awareness raising with establishing the Riversaver School Network
    • 10+ years in operation engaging thousands of volunteers and participants
    • building the Riversaver platform to share knowledge and motivate others to act for clean rivers
  • What impact did these projects have on biodiversity, if any?

    cleaner environment, no waste and plastic in the rivers and on the floodplain.

  • What work challenges did you face and what approach did you take to solve them?

    Regardless how many volunteers you have, it will not be enough to clean our rivers and keep them clean, so we decided to share the knowledge, go for citizen science and involve technology that can reduce the need for human resources in monitoring and understanding the movement of plastic pollution in rivers.

  • What lessons learned are transferable to other places/projects?

    We have learned many and now we are in the phase to create transferable protocols and descriptions for the riversaver platform to arm and motivate others to start caring about the rivers.

  • What is your biggest barrier and what are you trying to do about it?
    We have never had barriers, just challenges. We have had many during our 10+ years journey. We have kept working on them and established cooperation with industry and academic partners that now works as a forward bringing circle. We needed to recognize that as a civil organization we cannot invite and solve technical matters ourselves due to lack of infrastructure, lab and competences. But, we have on the site knowledge and data about plastic pollution which is valuable for academic research to validate their development and models. So, we provide data, our partners use them in research, and we use the outputs again on the site to get more data, and so on. This is how an NGO can catalyze research and validate academic outputs.  
My Focus and Approach
  • Lessons Learnt - Some recommendations for others?
    1. What’s most important:

      The success of Plastic Cup has two keys:

      • Waste is value!
      • Cleanup must be fun!
    2. Do this, not that: 

      Stop the pollution at the river as close to its origin as possible, and not in the ocean. With the distance, plastic will fall to pieces leading to microplastic pollution and some of the plastic object will sink or covered by sludge – no one will ever collect them.

      The best solution is prevention though. This is the reason Plastic Cup has a dedicated education program for schools, has a fleet of awareness raising tools and works together with waste management entrepreneurs in Ukraine (source are of Bodrog and the waste) to divert waste from the river. so far more than 1200 tonnes got diverted.

    3. Always start by:

      Connecting to the local community and stakeholders. They can help you a lot – they know the river and each other. You have the methods on how to clean the river, but they live there and need to be engaged for a long term success.

    4. What to do when things get difficult…:

      Call the water rescue team! No joke, water and outdoors can be dangerous, be prepared for the worst by having an official water rescue team present.

    5. 5 simple steps to:
      1. Respect the river – build connections to the local communities and organizations.
      2. Learn the waste – do the monitoring of the targeted area to find the polluted spots.
      3. Form your team – recruit volunteers and assign tasks.
      4. Do the dirty job with smile – collect the waste with ensuring that everyone is happy.
      5. Sort the collection – up to 70% recycling rate is possible with so much opportunities in upcycling!

    6. The biggest barrier and what I am trying to do about it:

      To address the complex issue of transboundary riverine litter pollution, Plastic Cup has developed a comprehensive solution tailored to the multinational context of the Danube River Basin, known as the Riversaver Toolkit. As part of the Danube Lighthouse project DALIA, this toolkit will be made available as a one-stop-shop platform; a single, user-friendly website that brings all relevant tools, resources, and methodologies together in one place. 

      This aims to tackle the first major challenge: rivers vary not only from one to another, but even a single river changes from day to day. Selecting the best cleanup approach is rarely straightforward. 

      The second major challenge is ensuring the long-term sustainability of river cleanup efforts. 

      The Riversaver Toolkit is designed to support both the strategic planning and operational execution of cleanup actions—making them more effective, adaptable, and resilient over time. To support funding for cleanup and prevention efforts, Plastic Cup develops innovative revenue streams. These include opening community river cleanups to companies willing to pay a participation fee, certifying and accrediting collected and sorted environmental plastics, and producing circular raw materials from riverine waste. All of these efforts contribute to making river cleanup not only impactful—but financially sustainable as well.

My Journey
  • My journey:

    Already from my childhood I have been an outdoor, water guy. Family holidays, usually ended up at water sides – for canoeing at the river, or windsurfing at lakes, and so on. Before age of 10, I canoed, windsurfed, sailed, etc. So, the link to the water which now is missing from many people, was established for me very early. That was complemented with interest for environment and sustainability. Meeting the Plastic Cup fleet at the Tisza river, then was decisive and the case was there – mixing the hobby with the good deed for a better world. But, we all know since then that cleanup is fun! 

  • My Education:
    • Msc in bioengineering and then PhD in chemistry and chemical engineering – both at the Budapest University of Technology and Economics. 

  • The Big Change:

    Getting respect and attention to the rivers!

  • Favourite part of the work I do:

    Getting dirty and collecting waste in the floodplain while seeing have this whole feeling can catch people willing to collect every bottle. 

Interview

Key Topics:

Key Topics

These relate to specific topics (e.g. technical solutions; restoration activities etc.) addressed within the showcase materials.

  • plastic pollution of rivers
  • cleanups
  • recycling and upcycling
  • awareness raising
  • citizen science
Prone2Success Factors Demonstrated:

Prone2Success Factors Demonstrated

These are the Prone2Success checklist factors which are highlighted within this showcase. More information on the Prone2Success checklist can be found here.

  • Measurable goals to improve ecological status
  • Communicate/engage with stakeholders from the outset
  • Engage with the local community from the outset
  • Obtain sufficient finance for all project stages
  • Local planning processes are transparent / clearly understood
  • Include long term monitoring
  • Ensure stakeholder understanding / education of restoration goals & benefits
  • Demonstrate specific ecological improvements/legal compliance / communicating results during and after the project
NRL Restoration Categories:

NRL Restoration Categories

These are the restoration categories (listed under Annex VII of the European Nature Restoration Law (NRL) which are relevant to this showcase.

  • [2] Improve hydrological conditions
  • [32] Reduce pollution (chemicals, urban/industrial wastewater, litter, plastics)
Resources
Articles
Peer reviewed papers
  • Fleit G., Nagy T., Málnás A.K., Husztik D., Ilcsik Cs., Molnár D.A., Gyalai-Korpos M., Baranya S. (2023) Coupled Field and Numerical Analysis of Riverine Macroplastic Transport. In Proceedings of the 40th IAHR World Congress, 21–25 August 2023, Vienna, Austria. https://www.iahr.org/library/infor?pid=29582
  • Molnár AD, Málnás K, Bőhm S, Gyalai-Korpos M, Cserép M, Kiss T. (2024) Comparative Analysis of Riverine Plastic Pollution Combining Citizen Science, Remote Sensing and Water Quality Monitoring Techniques. Sustainability. 16(12):5040. https://doi.org/10.3390/su16125040
  • Ronkay F, Slezák E, Gere D, Lukács N, Gyalai-Korpos M, Molnár DA, Bocz K (2025)  Thermoanalytical Approach to Assess Riverine PET Litter and Its Recycling Potential. Sci Rep 15, 15673 (2025). https://doi.org/10.1038/s41598-025-94925-y
Videos

DALIA Lighthouse Plastic Cup trailer

Everything about Plastic Cup

Euronews report about the Bodrog river

Clippings, white papers
Acknowledgements & Links

This material was provided by: Miklós Gyalai-Korpos

The success of the Plastic Cup is due to our committed and enthusiastic volunteer base we can always count on, as well as the hard work of the Admiralty, our management board. Big thanks to our supporters and sponsors.

The Riversaver Toolkit and platform is developed in the frames of the DALIA project.

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