Java Diesel

New research shows that waste coffee grounds can be used to make bio-diesel. The press release from the American Chemical Society states that spent coffee grounds have about as much oil as traditional virgin bio-diesel feed stocks.

The resulting coffee-based fuel — which actually smells like java — had a major advantage in being more stable than traditional biodiesel due to coffee's high antioxidant content, the researchers say. Solids left over from the conversion can be converted to ethanol or used as compost, the report notes.