Numerical Model Development on Ultrasound-Assisted Extraction Process for Production of Nutmeg (Myristica fragrans Houtt) Oleoresin

Oleoresin is one of nutmeg processed product that has many advantages for use in industries and it produced using extraction methods. Ultrasound-Assisted Extraction (UAE) is a non-conventional extraction method to produce oleoresin from nutmeg (Myristica fragrans Houtt) seeds. The effects of ultrasound amplitude (45, 60, 75, 90% amplitude) and extraction time (30, 45, 60, 75 min) to oleoresin concentration were investigated. A model was built to describe the extraction process based on the second order model and oleoresin extraction mechanism. The regression method for each parameter has been used to solve the formula and the calculated values were in good agreement with the experimental data. The model was agreed with experimental data with the error between 0.023% to 3.2% and has coefficient correlation 0,983. The result showed that the model could be used to predict the concentration of nutmeg oleoresin using Ultrasound-Assisted Extraction method with extraction time of 30-75 minutes and ultrasound amplitude of 45-90% as the boundary condition.