Bottom-up − slag granulate and dredging robot in collaboration for resource recovery from sediment

Purpose and goal

The goal is to verify the function of magnetic slag granules for separation and enrichment of dedicated contaminants/searched minerals in lab-scale trials and to determine optimal granule size for manufacturing, long-term sorption capacity of granules, simulate capping of sediment and simultaneous dredging of granules and sediment with low-flow dredging technology. Furthermore, propose process technology for the extraction of fixed minerals and develop a proposal for full-scale project.

Expected effects and result

We expect to deliver a) report on performance of magnetic slag granules for sludge/sediment treatment, b) report on field technology in using slag granules for recovery of metals and phosphorus, c) report on process technology in recovery of metals and phosphorus from slag-granules, d) project plan for full-scale projects where involved parties and people in the project as well as other stakeholders in the work develop a plan for a full-scale project and creation of consortium.

Planned approach and implementation

The work is carried out in four WPs: 1: Slag-granules function. Petrit T-S and CarbonMV are studied in the lab to ensure metal sorption and organic substances. 2: Application, dredging, slag granules + sludge. Technology for application and recovery with two robots and computer simulation. 3: Process technology, extraction of metals and phosphorus from slag granules. Separation methods for recycling metals and phosphorus. 4: Plan full-scale projects with the steel industry and other industries