A company called E-Fuel is producing washer/dryer-sized refineries for producing biofuel from sugars and yeast.  It’s essentially a still for making gas rather than moonshine.  They go for around $10k each and can produce 5 gallons of E100 per day.  Requires water, yeast, sugar and power.  Supposedly produces biodiesel around $1/gallon.

via Wired