2.4.2. Base transesterification
After the separation process of the acid esterification was completed,
the base transesterification of used cooking oil into biodiesel
using CaO derived from chicken and ostrich egg shell was
carried out by placing 500 ml SCHOTT DURAN laboratory glass
bottles and screw cap in incubated/refrigerated temperatures with
orbital shaker. The calcined CaO catalyst was activated by adding it