A recent published article in an open access paper in the ACS journal Environmental Science & Technology is about ethanol production process that capable to reduce carbon footprint up to 87 per cent. This amazing discovery is a reported analysis by a team from Algenol and Georgia Tech that are working on developing ethanol based bio fuel from algae in photo bioreactors connected to fossil fuel power plants.

Algenol-algae

The ethanol production process uses a culture medium that consists of cyanobacteria grown in flexible-film polyethylene-based photo bioreactors containing seawater or brackish water.

And surprisingly, in order to support efficient growth of those natural bio producer for ethanol, the bio reactor itself is built near a fossil-fuel power plant to ensure sufficient supply of CO2 for the algae. The use of industrial CO2 in the direct ethanol technology causes 67% to 87% reduction in carbon footprint on an energy equivalent basis for initial ethanol concentrations ranging from 0.5% to 5%.

[ Source: TreeHugger ; ACS ; Green Car Congress ]