The bio-diesel conversion for soybean oil and waste cooking oil
In this research, the optimal condition for the fresh cooking oil was 99.3% in the condition of 1.85 wt.
% SrO, 6:1 methanol: oil molar ratio, and 40 second microwave irrational time. In the section, the bio-
diesel conversion efficiency for waste cooking oil was also evaluated in this study.
According to Freedman et al. [27](1984) studied the influence of the free fatty acids (FFA) and water
content in the production process of biodiesel. They found that the oil acid value should be less than 1 mg
KOH/g and that all raw materials should be anhydrous (water content