Recycling of phosphorus from sewage sludge into products
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB - SP Energi och bioekonomi, Stockholm |
| Funding from Vinnova | SEK 3 079 201 |
| Project duration | November 2016 - February 2020 |
| Status | Completed |
Purpose and goal
The Swedish project P-to-Product focused on developing and adapting methods to promote recirculation of phosphorus (P) products extracted from sewage and sewage sludge. The project consisted of three work packages: 1) market introduction, 2) environmental impacts and 3) agricultural requirements. Methods have been adpated and tested for all three areas so the goals have been fulfilled.
Expected results and effects
In wp 1 opportunities and barriers were identified and policy recommendations developed. In wp 2 a simplified LCA was developed focused on nutrient recycling, global warming potential and energy use. In addition to this a chemical checkpoint was formulated including a wide range of pollutants. For the development of methods in wp 2, granulated or pelleted nutrient products were used as case products. These products were also used in wp 3 where physical properties were evaluated and spreading tests were executed using existing machinery. The project provided a useful set of methods.
Planned approach and implementation
In wp 1 opportunities and barriers were identified and policy recommendations developed. In wp 2 a simplified LCA was developed focused on nutrient recycling, global warming potential and energy use. In addition to this a chemical checkpoint was formulated including a wide range of pollutants. For the development of methods in wp 2, granulated or pelleted nutrient products were used as case products. These products were also used in wp 3 where physical properties were evaluated and spreading tests were executed using existing machinery.