Bacteria Biomining for Battery Metals

Lithium, cobalt, and nickel are the mineral backbone of the clean energy transition — yet extracting them conventionally requires open-pit mines, acid leaching baths, and energy-intensive smelters that themselves produce significant carbon emissions. For every tonne of battery-grade lithium produced by conventional pyrometallurgy, several tonnes of CO₂ are emitted. The irony of a carbon-intensive supply chain for low-carbon batteries has become one of the more uncomfortable tensions in the energy transition narrative.

Oslo-based Brokkr is developing a biomining platform inspired by electrogenic bacteria that naturally solubilise metal ions from rock and sediment as part of their metabolic cycle. Species such as Geobacter and Shewanella transfer electrons to solid metal oxides, effectively reducing and dissolving them at ambient temperature and pressure — a process that requires no acid bath, no furnace, and no smelting flux. The bacteria produce a dilute metal-rich leachate that is then electrochemically concentrated and separated.

Brokkr's approach combines engineered microbial consortia with modular electrochemical cells. The bacteria are cultivated on ore feedstocks in bioreactors; their metabolic electron transfer dissolves target metals selectively, while a downstream electrolytic stage recovers battery-grade product. Because the process operates at room temperature, energy consumption is a fraction of conventional smelting. The process also works on low-grade tailings — the vast stockpiles of previously uneconomic waste left behind by conventional mining — potentially unlocking billions of tonnes of stranded battery-metal resource.

If commercialised at scale, bacterial biomining could transform the geography of battery-metal supply: rather than concentrated smelter complexes near major mines, distributed bioreactor units could process tailings wherever they exist, reducing both transport emissions and geopolitical concentration of critical mineral supply chains.