Back in 2010, we at BiotaTec performed trial bioleaching tests with Graptolite Argillite.   

Due to fascinating results we carried out a further investigation that resulted in a vision of a combined method for the degradation of organic geopolymers and bioleaching of metals from given Estonian black shale.  In a given approach, specially developed consortia of microorganisms produce methane gas in anaerobic phase at neutral pH while simultaneously freeing metals through degradation of organic complexes. We named the technology BiotaMet. 
5 years long research resulted with a patent application in 2016 and PCT in 2017.

The approach of BiotaTec can be adapted for any organics and metallic complexes containing ore / mining waste that is considered not valuable for processing with less profitable traditional technologies or common bioleaching at acidic conditions. Through the generation of methane gas as energy, the whole process would be more cost-efficient, by breaking up the organic complexes more valuable metals would be extracted and the solid waste of would be more environmentally friendly. 

New R&D projects have started with samples of different oil shales, red mud, and waste electronic equipment.

Was that interesting?  Please send us an e-mail with your thoughts and we will be excited to perform preliminary tests with your raw material. 

For such or any other type of co-operation please contact us via sirli(at)