Phosphorus recovery from sewage sludge ash: DreiSATS shows new approaches

The DreiSATS joint project demonstrates how a sustainable and decentralized circular economy for sewage sludge can work. Phosphorus recovery from sewage sludge ash plays a central role in this approach. The project uses Carbotechnik’s patented dust firing technology for thermal treatment.

The technology supports economically viable operation, even in smaller plants. At the same time, the integrated process removes heavy metals and improves ash quality. As a result, the ash provides a valuable basis for further use in fertilizer applications.

Sustainable thermal treatment of sewage sludge

Thermal treatment of sewage sludge forms the core of the project. Carbotechnik’s patented dust firing technology supports a decentralized approach that can also offer economic advantages for smaller plants.

The integrated process also reduces the heavy metal content of the resulting ash. This improves ash quality and helps preserve valuable nutrients for further applications.

As a result, the technology combines efficient thermal treatment with improved opportunities for resource recovery.

Phosphorus recovery supports regional circular economy

Phosphorus recovery from sewage sludge ash offers significant potential for a regional circular economy. Instead of transporting nutrients over long distances, operators can recover and use regional resources locally.

The treated ash can serve as a basis for fertilizer production. In this way, regional sources can help meet local nutrient requirements.

This approach reduces transportation distances and, at the same time, strengthens regional value creation.

The Pontes-Pabuli Process for ash treatment

In addition to thermal treatment, the Pontes-Pabuli process offers further opportunities for phosphorus recovery.

The process combines acid digestion and granulation to recover phosphorus from sewage sludge ash and produce marketable fertilizers. It therefore complements thermal treatment and expands the options for sustainable resource recovery.

Together, these technologies can help make valuable nutrients available for new applications.

Sustainable phosphorus recovery with regional potential

The combination of different technologies demonstrates how the industry can develop a future-oriented circular economy for sewage sludge. Thermal treatment, heavy metal removal and subsequent ash processing work together to create new opportunities for recovering valuable nutrients.

In particular, phosphorus recovery from sewage sludge ash can help close regional material cycles and improve the efficient use of existing resources.

Moreover, the decentralized approach can support regional solutions and reduce dependence on long transport routes.

Less transportation and more regional value creation

The DreiSATS project combines advanced technology with a regional approach. Decentralized plants can reduce transportation distances and simplify regional material cycles.

At the same time, valuable nutrients can remain within the region and support fertilizer production. Consequently, the project contributes to sustainable phosphorus recovery and a more resource-efficient circular economy.

Conclusion: turning sewage sludge into a regional resource

DreiSATS demonstrates that sewage sludge and the resulting ash can serve as valuable resources rather than simply becoming waste. Modern thermal processes and targeted treatment can recover valuable materials and make them available for further use.

The combination of Carbotechnik’s patented dust firing technology and the Pontes-Pabuli process creates promising opportunities for decentralized resource recovery and sustainable phosphorus management. In this way, DreiSATS provides a practical contribution to the future of regional circular economy solutions.