There was only one biofuel that ever made any sense. It is the one that the oil companies quietly embraced and even built test production facilities for.
Algae based biodiesel. Among its advantages.
1) Diesel engines are everywhere, and with minor modifications, they can run on it. They are scalable, running everything from motorcycles to railroad trains to ships that need higher speed than those that use ship oil.
2) Anywhere that has warmth, sunlight and gray water can grow algae. South of the Mason-Dixon is year around production, unlike plant crops.
3) Algae production is magnified if they are given industrial waste gases, CO2 and nitrous oxides, that otherwise are very expensive to dispose of.
4) Some types of algae are 50% oil, by weight. Processing this oil is done by squeezing. Then it is mixed with ethanol and lye, which is a reusable catalyst. Then it is filtered and has 1% petroleum diesel added as a preservative. There are a few more steps, but they are cheap and easy.
5) Probably the two biggest problems are keeping out other types of algae, and keeping the water the right temperature for optimal production.
Unfortunately algae Diesel is much like controled hot fusion, decades of Research, no economic process yet.