Astronauts Explore Biomining: Using Microbes to Harvest Metals in Space

A recent study conducted aboard the International Space Station (ISS) investigated the potential of using bacteria and fungi to extract minerals from meteorites under microgravity conditions. Led by researchers from Cornell and the University of Edinburgh, the experiment focused on extracting platinum from an L-chondrite asteroid sample using the bacterium Sphingomonas desiccabilis and the fungus Penicillium simplicissimum. These microbes produce carboxylic acids that bind to minerals, releasing them from the rock. The work was part of the BioAsteroid project, a collaborative effort between the University of Edinburgh and the European Space Agency (ESA).

The deployment of 'biomining reactors' to the ISS in late 2020/early 2021 marked a significant step in understanding how gravity affects the interaction between microbes and rock in microgravity. The experiment also included a metabolomic analysis to identify biomolecules and secondary metabolites involved in the extraction process. This research has implications for in-situ resource utilization (ISRU), which is crucial for long-duration space missions and the establishment of space settlements. By harnessing the capabilities of microbes, astronauts could potentially extract valuable resources from asteroids and other celestial bodies, reducing dependence on Earth-based supplies.

From a market perspective, the development of biomining technologies could create new opportunities for space startups and established aerospace companies. Companies specializing in bioreactor design, microbial engineering, and ISRU systems could benefit from increased demand for their products and services. The potential for extracting rare earth elements and other valuable minerals from asteroids could also attract investment from the mining industry. However, the economic viability of biomining in space will depend on factors such as the cost of transporting equipment and personnel to asteroids, the efficiency of the extraction process, and the market price of the extracted minerals. Further research and development are needed to overcome these challenges and realize the full potential of biomining in space.

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