Beer is greener than you might have known. E-Fuel, the maker of the EFuel100 MicroFueler ethanol maker has teamed up with Sierra Nevada to use the left over yeast from the brewing process, called trub, pronounced “trube”, to test the invention. I love it, yet another reason to pour another pint.

E-Fuel last year unveiled its $9,995 home ethanol machine which ferments a mix of water and sugar into ethanol. Ethanol is mixed into gasoline at 10 percent. Flex-fuel cars can run on E85, an 85 percent blend of ethanol and gasoline.

Sierra Nevada every year generates 1.6 million gallons of “bottom of the barrel” beer yeast waste, which it now sells to farmers as feed. The MicroFueler will be able to raise the alcohol content in that mix to 15 percent and remove water.

(via CNet News)