2019 : Ecofuel conversion technology of inedible lipid feedstocks to renewable fuel

Siti Zullaikah ST.,MT.,Ph.D


The main obstacle in the global commercialization of biodiesel is the high production cost. In general, biodiesel feedstock depends on crops amenable to regional climates. The use of refined edible oils for the production of biodiesel accounts for 60%–80% of the biodiesel production cost. Utilization of alternative feedstocks that are cheap, abundant, and inedible can decrease that production cost. Besides that, the optimization of the synthesis and purification processes and the utilization of byproducts can also reduce the total biodiesel production cost. This chapter discusses the advantages and drawbacks of catalytic and noncatalytic technologies to convert inedible feedstocks, such as rice bran, microalgae, and spent coffee grounds. For rice bran, the noncatalytic in situ trans(esterification) using a subcritical water-methanol mixture seems to be the most promising method as it requires no preliminary steps to …