Increased recycling of wood ash to forestry by including biogas upgrading
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB - RISE Jordbruk och livsmedel Uppsala |
| Funding from Vinnova | SEK 500 000 |
| Project duration | November 2018 - October 2019 |
| Status | Completed |
| Venture | Circular and biobased economy |
| Call | Circular and biobased economy |
Important results from the project
The aim of the project has been to contribute to the development of a new system for ash management, which means that ash filter technology can be used to process biogas to vehicle fuel and at the same time contribute to that more wood ash will be recycled to forestry. The objectives have been, among other things, to assess technology for ash management and analyze which actors should be included in the system and what roles they should have. After completion of the project, we can ascertain that goals and objectives have been met.
Expected long term effects
The project has developed a new ash management system that includes ash filters for biogas upgrading and ash stabilization. We have carried out experiments in which 10 tonnes of ash have been stabilized and then spread in forestry by using conventional technology. The result of the spreading was successful and showed that ash from ash filter is suitable for recycling ash to forestry. This may eventually lead to more biogas being upgraded and the amount of ash recycled to the forest will increase.
Approach and implementation
The project took longer than planned due to several reasons. The test where ash was spread in forestry was conducted in the beginning of June since the trees are more sensitive in May and thereby have higher risk to be damage in conjunction with spreading. This led to delays in the project. In addition, there was a high workload in the project group, which contributed to the project´s closing date being extended to 15 November.