On June 6, 2024, Baden-Württemberg's Minister President Winfried Kretschmann visited the Büsnau Training and Research Sewage Treatment Plant to witness a pioneering project that aims to revolutionize how sewage treatment plants operate. Researchers from the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) are leading the way in demonstrating how sewage treatment plants can contribute to climate neutrality by recovering valuable raw materials from wastewater. The project, known as KoalAplan, focuses on extracting raw materials like nitrogen and organic carbon compounds from wastewater to produce eco-friendly products such as fertilizer, hydrogen, and bioplastics. The biorefinery pilot plant at the University of Stuttgart has been successfully operating since 2023, showcasing the feasibility of industrial-scale raw material recovery in sewage treatment plants. The innovative processes employed by the project group involve a combination of chemical, physical, and biological steps to efficiently transform wastewater into valuable resources. By reducing carbon dioxide emissions and producing raw materials that can replace petroleum-based substances, the project aims to pave the way for sewage treatment plants to play a significant role in achieving climate neutrality. The project's success lies in its holistic approach to wastewater treatment, incorporating mechanical cleaning, ultra-fine micro-sieves for carbon separation, ion exchange for nitrogen removal, and microbial electrolysis for hydrogen production. Through a series of innovative processes, the project not only contributes to climate neutrality but also demonstrates the potential for sewage treatment plants to become key players in the sustainable bioeconomy. The continuous operation of the biorefinery pilot plant highlights the effectiveness of the process chain and sets a precedent for the implementation of similar strategies in other sewage treatment plants.