After reading what he writes, we realize that it is far from being as organic as we would like us to believe. A shame :
You don't have to talk just about anything with the DIESTER, for my part I work in the design of the DIESTER manufacturing units (I took care of the sites of Sètes, Compiègne, Montoir and now it's Bordeaux and Rouen + 1 site in Spain) and I can tell you that the processes involved are complex and require considerable energy to produce a "supposedly" clean fuel ...
It is necessary to take into account the complete ecological assessment and not the only assessment of your car (knowing that there will be only a little more than 10% at most in your diesel)
A small image of the pipes from one of the DIESTER sites:
source http://www.planete-205.com/forum/viewsujet-21611-15.php