International Summer School on Sustainability
Join us at our International Summer School on Sustainability i3s and engage with students from around the world and across diverse fields of study to explore solutions for a more sustainable world. The International Summer School is a collaboration between OST Eastern Switzerland University of Applied Sciences, HKA University of Applied Sciences Karlsruhe and Oklahoma State University.
i3s Summer School 2026: September 7 - 11
Karlsruhe University of Applied Sciences, OST, and Oklahoma State University invite students from various disciplines and countries to exchange ideas and learn from one another at the fourth International Summer School on Sustainability. The 2026 event will be hosted by Karlsruhe University of Applied Sciences.
Topics and highlights from the program:
- Sustainability (Promotion and Implementation)
- Environmental Technology Renewable Energy: Solar, Water, Wind
- Energy Storage
- Sustainable cooling and heat pump technology
- Clean water
- EU Project SophiA
- Workshops
- Joint excursions, leisure activities, and celebrations
- Visits to the HKA campus and laboratories
Costs:
200 euros for external students who require accommodation.
With generous financial support from:
Advansor | Güntner | Rivacold | Secon | Stiebel Familienstiftung | Valerius Füner Stiftung | Wolfgang Hoheisel | Verbund der Stifter
Congratulations to Fadel Muhammad Zikrillah!
Fadel Muhammad Zikrillah and his team have won Stanford University’s Global Sustainability Challenge 2026 with their “Cool Fish” project. The project focuses on sustainable, off-grid cooling of fish after harvest in Indonesia. In the fall of 2025, Fadel participated in the i3s International Summer School for Sustainability at OST, where he was introduced to solar-powered cooling technologies developed as part of the SophiA project. Building on this experience, Fadel and his team independently developed the Cool Fish project to address key technical and economic barriers facing small-scale fisheries. Among other features, it boasts a foldable design for easy transport in a boat. The project’s success underscores the vital role of academic exchange programs.
Noble Banadda International Summer School on Sustainability 2025
The 4th International Summer School on Sustainability i3s was a great success. Sixty students from 15 countries across four continents gathered at OST – Eastern Switzerland University of Applied Sciences in Rapperswil-Jona to work towards a more sustainable future and to expand their network.
The program included expert lectures, workshops, and excursions. The students engaged deeply with topics such as industrial heat pumps, solar technology, energy technology, PFAS, and sustainability management. Among other activities, they visited the production facilities of Everllence (formerly MAN Energy Solutions) in Zurich and the Werdhölzli wastewater treatment plant in Zurich.
«How Mihaela and Michael managed to turn 60 mostly unknown students into one big family within just a few days borders on magic.»
Hasib from Bangladesh
With generous financial support from:
Advansor | Jaeggi-Hybrid | Pfadiheim Lattenhof | SSP Kälteplaner AG | Rivacold | Restaurant Rossini | Valerius Füner Stiftung | VDE Verlag | Verbund der Stifter an der Hochschule Karlsruhe | Landgasthof zum Zimmermann
