According to Official Guinness Records,
In June 2010 at the ILA Air Show in Berlin, EADS, the European defence company, demonstrated the first public flight of an aircraft with one engine powered by algae derived bio-fuel. The aircraft was a twin-engine Diamond DA42 NG light aircraft. The engine fed with bio-fuel showed a fuel consumption that equated to a saving of 5-10 percent compared to the engine using conventional jet kerosene. It is claimed that exhaust gas measurements show that the bio-fuel is much less polluting than conventional fuels.
For a complete list of 2010 records, please visit 2010 Guinness Records in Germany.