Right now I completed test the solid catalyst esterification. So that I can produce the Esterified Oil from High FFA CPO (=<25%FFA) to EBD-PO (=< 0.3%FFA).
EBD-PO is suitable to produce biodiesel with the FOB Price = CPO (MPOP Price)+0.01USD
Some body try to buy Used Cooking Oil to produce the biodiesel. If Used Cocking oil have FFA >= 5% You may have problem with transesterification so That Esterifid Palm Oil(EBD-PO) is the best way that you can to produce Biodiesel.
http://www.h2oil.co.th/KC-Machine/How-to-do-Biodiesel.htm
The web page Link show above shown the simplified how to do the Biodiesel from CPO dirrectly with out Refinery Palm oil.