Can bioleaching reduce the greenhouse-effect?

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Question: As bioleaching microbes consume CO2 wouldn’t bioleaching operations be a good way to reduce the greenhouse-effect?

Answer: The growth of the bioleaching microorganisms does require CO2. However, the alkaline gangue minerals that are fed into the bioleaching process decompose in the acidic medium to release CO2, so the overall balance becomes very complicated. Compared to the CO2 emissions from electricity generation, the CO2 that is demanded by the microbes is negligible. All down-stream neutralisation process emit CO2 (from limestone (CaCO3))

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