Biofuel production

Biofuel production

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Caption: Biofuel production. Worker checking fermentation tanks at the NREL (National Renewable Energy Laboratory) Alternative Fuels User Facility (AFUF) Process Development Unit (PDU), USA. Sugars are fermented into ethanol in these fermentation tanks. The ethanol is then separated purified and recovered for use as a transportation fuel. Photographed at the National Renewable Energy Laboratory (NREL), Colorado, USA.

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