ABSTRACT
The potential raw material from plants, such as crude palm oil (CPO) pond, CPO off grade, palm stearin, and Jatropha curcas L. are other potential raw materials used as sources of biodiesel. Biodiesel can be also produced from microalgae. Microalgae are not a main source of food; therefore this raw material is relatively cheaper than sources of food. Raw materials with low free fatty acids (FFA) levels can be directly processed with a single stage process method, called transesterification process. Microalgae cultivation using sunlight energy can be carried out in open ponds, or closed photobioreactors, based on tubular flat plates, or other designs. A. S. Ramadhas et al. used high FFA rubber seed oil to biodiesel production. Miscibility is an important factor in biodiesel production. A common method for establishing the biodiesel potential of an algal strain is to determine the total lipid content.
