Thermal Processing of P-rich ashes aiming for HIGH-GRADE PHOSPHORUS Products (PHIGO)
| Reference number | |
| Coordinator | SWERIM AB |
| Funding from Vinnova | SEK 2 566 828 |
| Project duration | March 2022 - February 2025 |
| Status | Ongoing |
| Venture | ERA-MIN 3 |
Important results from the project
Yes, the PHIGO project met its initial goals by successfully extracting phosphorus as potassium metaphosphate (KPO₃), addressing the need for sustainable agricultural nutrients. The residual slag was modified to create di-calcium silicate for use in cement production, promoting sustainable construction. Overall, PHIGO not only achieved its objectives but also generated significant additional outcomes with positive industry impacts.
Expected long term effects
The PHIGO project is expected to yield several significant long-term effects. Firstly, by promoting sustainable phosphorus recovery from waste materials, it can enhance food security and reduce reliance on imported phosphate, bolstering agricultural resilience in the EU. Additionally, repurposing residual slag for cement production supports sustainable construction practices, contributing to a circular economy and reducing carbon emissions in the industry.
Approach and implementation
The PHIGO project utilized HSC Chemistry to design P-recovery recipes. Initial trials in a Tammann furnace optimized extraction conditions reached about 90% recovery. The lab scale trials were followed by upscaling in a technical scale induction furnace. HSC Chemistry also helped develop a flowsheet for different cases of P-recovery. Additionally, the project produced valuable by-products, including di-calcium silicate for cement production, enhancing sustainability and innovation.