The utilization of dredged sludge in construction materials.
About this good practice
The majority of additives allowed in cement standards are byproducts of other industries (e.g., granulated blast furnace slag, ash), and their availability is decreasing as we transition to a more circular economy. Therefore, it is crucial to research new additives, particularly focusing on the utilization of materials that are currently being disposed of (e.g., sludge from Lake Balaton). The application of cement additives can reduce the energy consumption and environmental impact of production while producing binders with more favorable mechanical properties. Locally in the Veszprém region, the utilization of Balaton sludge would incur low transportation costs. This would also free up areas currently functioning as sedimentation ponds.
Key points: Significant amounts of dredged sludge are generated, e.g., at Lake Balaton, approximately 200,000 tons per year.
The goal is to integrate the extracted sludge into the circular economy (e.g., as a cement additive, lime sand in bricks), thereby replacing natural raw materials.
The energy consumption and environmental impact of manufacturing processes can be reduced, leading to a decrease in CO2 emissions.
Lake Balaton sludge is obtained from Szabadics Zrt. During the development of the product, we collaborate with local companies that distribute binding agents (e.g., Cemix Hungary Kft.). Discussions are also underway with the Hungarian Cement, Concrete, and Lime Industry Association regarding possible standardization.
Resources needed
The practice is currently in the research stage at the University of Pannon in Veszprém.
Financed by "2020-1.1.2-PIACI-KFI-2021-00230" "Model Creation for the Reuse of Dredged Still Water Sediment in the Economy through the Examination of Sediment from Lake Balaton."
Budget: 1,387,551,419 HUF
Evidence of success
The current research results are promising. The Lake Balaton sludge, which is currently being disposed of, could serve as a new cement additive. This would lead to a reduction in the quantity of cement used, as well as the energy and raw material requirements of cement production, thereby decreasing its environmental impact. Additionally, areas currently functioning as sedimentation ponds would become available for other purposes.
Potential for learning or transfer
The utilization of dredged sludge in construction materials offers significant learning and transfer potential. This practice, developed to repurpose the 200,000 tons of sludge from Lake Balaton annually, showcases how waste materials can be integrated into the circular economy, replacing natural raw resources in products like cement. The environmental benefits—reduced CO2 emissions, lower raw material use, and freeing land from sludge disposal—can inspire similar solutions worldwide. Regions facing similar waste challenges can adapt this approach, benefiting from the economic efficiencies and environmental gains. The practice, still in research stages, provides valuable insights into securing funding, qualifying materials, and developing manufacturing processes, making it a transferable solution in sustainable construction and waste management efforts. Key stakeholders :construction companies, environmental professionals,universities, industries
Further information
Good practice owner
You can contact the good practice owner below for more detailed information.