The first event focused on the circular economy in the chemical industry. Dr. Wolf Klöckner from presented the sustainability strategy of Covestro with the core elements of renewable energy, recycling and alternative raw materials. The company has developed processes for recycling polyurethane and a bio-based production of aniline, which is currently in the scale-up phase to industrial scale. Dr. Balint Simon from the Mitsubishi Chemical Group began by discussing the fundamental role of the chemical industry in a sustainable economy before presenting his company's approaches and focal points, such as the development of new composite materials based on both biomass and recyclates or a complete recycling process for carbon fibre materials for the automotive industry. An important topic in the discussion was the problem of how used materials can be systematically returned for recycling.

At the second event, Wolfgang Köster and Carl-Luis Rieger from WEPA spoke about circular economy as a new business model. The family-run tissue paper manufacturer WEPA is one of the few in the industry to use waste paper as raw material instead of wood, as well as alternative sources such as miscanthus more recently. With its own solar and wind parks as well as investments in start-ups, e.g. in the field of renewable energies and water treatment, the topic of sustainability is addressed throughout the entire production process. Particularly important challenges are the multiple recycling of paper fibers as part of a cascade use and the acceptance of recycling-based tissue paper by the customers.

On May 13, the focus was on start-ups in the circular economy. Marcel Kunz presented the company TripleSolar, which offers heat pumps that are integrated into photovoltaic panels. This saves the outdoor unit otherwise required for heat pumps. Interest in the technology has risen sharply since it was reported on YouTube in 2023. Marius Wenning presented the company Omnivore Recycling, which uses the black soldier fly to recycle food waste from supermarkets. This takes place decentrally in modular containers installed at farmers' premises. Farmers can feed the larvae to animals as a source of protein and use the larval excrement as fertilizer. Three pilot plants are currently being planned in Germany.

On May 27, Klaus Ruhland reported on how Mercedes-Benz aims to save around 60% of CO₂ emissions by 2039 - through recycling, electrification of production and innovative approaches such as a “second life” for car batteries as stationary power storage units in addition to battery recycling. Jule Klein from Discover Airlines then described the challenges of the circular economy in air travel using the example of catering. The integration of international legislation, which often makes reusable concepts more difficult, is particularly complex here. Nevertheless, there is great potential: for every 3.5 million passengers, Discover Airlines alone serves around 17 million cups and 3.2 million complete meals every year.

On 3 June, the focus of the fifth session was on social innovations in the circular economy. Lennart Nübel presented Remondis, which recycles waste. Almost 68% of residual waste can be reused, with around 40% coming from organic waste and around 28% from other recyclable materials.

Dr Raphaela Kell  from regionale resilienz Aachen e.V. presented a project in which textiles are to be made from hemp. The project would be regional, as all production steps from hemp cultivation to textile production would be localised in Aachen. The project is still in the planning phase.

On June 17, Vanja Schneider from the company Moringa presented the “Hafencity Hamburg” project, in which consideration was given from the outset in all areas to how the components can be repaired and reused. Markus Müller from the Baden-Württemberg Chamber of Architects presented innovative building concepts aimed at the sustainability of urban lifestyles, for example through the use of recyclable materials, on-site renewable energy generation, efficient land use and greening.