Using natural processes, renewable resources and innovative technologies for cost-effective everyday solutions

Important results from the project

The purpose of the project was to investigate an innovative and cost effective biological treatment technology for polluted soils. The parameters regarding biological sanitation technology that have been investigated was: If a consortium of microorganisms from the Archaea domain can be used for biological treatment of contaminated soil If the incorporation of cellulose fiber into the soil can stimulate the degradation of the contaminants A new method for mixing microorganisms into the contaminated material in a scalable process so it can be used in a large remediation projetcs.

Expected long term effects

The project has shown that microorganisms from the Archaea domain can be used to bioremediate contaminated soil. Completed tests and investigations indicate that: Archaea can be used for degradation of contaminated soil containing high levels of PAH (Polycyclic Aromatic Hydrocarbons). Infusion of cellulose, or other organic matter, does not affect the degradation of PAH. It is a technical challenge to get a good mix of microorganisms into the soil. Attempts have shown that mechanical interference with the addition of microbes in a slurry works better than infiltration.

Approach and implementation

Trials have been made on soils from a former gasworks site containing high levels of PAH. Tests have been carried out in both lab environment and in bio-chambers. Blending microorganisms with the contaminated soil is a technical challenge that needs to be verified on a larger scale. Interviews have been made with personnel on a waste facility to get information on alternative treatment methods, cost calculations and the design of full-scale biological treatment. Bio-treatment with Archaea is cost-effective compared to other treatment options according to our desktop study.