Blimey, Audi has issued a release saying it can make fuel from waste water.
Actually it's the bugs in the water. Audi teamed up with US-based specialist fuels company Joule to investigate options for sustainable future fuels. The partners says they have produced e-ethanol and e-diesel by combining waste CO2, sunlight and microscopic organisms suspended in waste water. The equipment needed is apparently some lengths of ordinary-looking pipe.
Audi says its engineers have "contributed to a breakthrough of almost miraculous proportions” and it certainly sounds like a win-win if it can be produced in significant volume for a price people will pay.
I'm also keeping an eye on diesel from algae or fungus and ethanol from sugar beet or waste wood.
Read more here.