3.5. Effect of particle size
The rate of extraction increases with the decrease in the size of
particle (Sirisompong et al., 2011). Fig. 5 shows the effect of particle
size on oil extraction using soxhlet and batch extractors. Different
particle size of coconut waste namely 0.5 mm and below; and
0.7 mm and below; and 1.2 mm and below were used to extract
maximum amount of oil. From Fig. 5, oil yield using hexane and
soxhlet extractor was 23.6%, 22.7% and 22.5% with particle size
diameter of 0.5 mm, 0.7 mm and 1.2 mm and below, respectively.
This shows that smaller particle size extracted more than 1.1% of
oil if compared with the larger particles. The extraction yield for