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2015-01-14 15:43

Unused resources in ash

Here in Sweden, much of our waste is incinerated. After waste is incinerated, substances such as phosphorus and zinc remain in the ash. Now, researchers at the University of Borås will examine how these substances can be separated and used.

Anita Petterssson

Two research projects on the subject of incineration and thermal processes have received just over SEK 300,000 from the Thermal Engineering Research Association and the Sjuhärad Savings Bank Foundation to study the ash created when waste is incinerated. One of these is a sub-project in association with IVL Swedish Environmental Research Institute. The other will be carried out in association with Umeå University and involves recycling phosphorus. This is intended to be a start-up project for more extensive research collaboration within the field.

“It’s important that we find ways of recycling materials from ash,” explains resource recycling researcher Anita Pettersson. “The ash is currently sent to Norway for processing, but this opportunity won’t be available eight years from now.”

A third research project will involve researchers looking at the gasification of biomass. This is a collaboration with SP Technical Research Institute of Sweden, with financing of just over SEK 300,000 being provided by the Swedish Energy Agency and Göteborg Energi. The project will characterise biomass and the solid residual product obtained following the gasification process. The gasification process will also be modelled using thermodynamic equilibrium calculations.

Anita and research student Farzad Moradian will carry out the project by conducting laboratory research on ash.