Prodiesel,
There are some companies who say they have produced biodiesel from algae. Only one I know of, Aquatec in New Zealand, advertised they had used it (as B5) in an engine. Marc at Ecogenics says he produced a few gallons as test a while back.
Take with a pinch of salt, any company that says it is, or is capable of, producing algae biodiesel by the ton.
And therein lies the reason for all the scams and high interest in this fuel for the future. Scammers are going for the gullible mom and pops whilst the honest companies struggle to achieve production at economical levels.
Slippery
Small steps taken one at a time.