Bottom-up − slag granulate and dredging robot in collaboration for resource recovery from sediment
| Reference number | |
| Coordinator | Kungliga Tekniska Högskolan - Institutionen för hållbar utveckling, miljövetenskap och teknik (SEED) |
| Funding from Vinnova | SEK 449 600 |
| Project duration | November 2024 - June 2025 |
| Status | Ongoing |
| Venture | Impact Innovation Metals & Minerals - Program-specific efforts Vinnova |
| Call | Impact Innovation: Feasibility studies within Technological Action Areas in the program Metals & Minerals |
Important results from the project
The objectives of the SLAGGVINN to verify the function of two different types of slag granules for binding and recovering metals from contaminated sludge/sediment were met through manufacturing steps, lab-scale tests and technical calculations. The results are considered sufficient to take the method further to pilot and full-scale field trials. Regarding metal recovery through electrodialysis, more research remains for optimization and adaptation of the process with metal-concentrated granules.
Expected long term effects
Within 5 years, it is anticipated that the method will be adapted for field scale and this initiative will be accepted in society for nature restoration and recycling. In this way, the method that the project is developing can provide long-term benefits for both the environment and industry. Sustainable systems should be based on circularity and the by-product slag processed as metal-binding granules for sediment remediation and refining of sediment fractions, contributes to this objective.
Approach and implementation
The project was done according to plan, except for delays that led to an extension. Eligibility requirements on legal agreements from coordinating partner caused major disruptions. The production of magnetic granules took longer than expected. Physical meetings were not held except for reports at Jernkontoret´s TO55. The collaboration in the interdisciplinary research worked excellently. The activities were stepwise dependent on each other; granule production-lab experiments-electrodialysis.