Research Output | Dar Al-hikmah Library | IIUM Only
The reduction of free fatty acids (FFAs) in sludge palm oil (SPO) was measured at different sonication time from 30 to 300 min and the optimum time was determined. It is reasonable to indicate that the pretreatment of SPO by applying ultrasonic energy is related to long sonication time. The results showed that the FFA content of SPO reduced from 24