Innovative Approaches to Citrus Peel Essential Oil Extraction: Comparing Ohmic-Assisted and Conventional Hydrodistillation Techniques
Imroah Ikarini (1,3*),Sudarminto Setyo Yuwono (1), Widya Dwi Rukmi Putri (1), Christina Winarti (3)

1 Doctoral Program of Food Science, Faculty of Agricultural Technology, Brawijaya University, Malang, 65145 Indonesia
2 Food Science and Biotechnology Department, Faculty of Agricultural Technology, Brawijaya University, Malang, 65145, Indonesia
3 Research Center for Agroindustry, National Research and Innovation Agency, (BRIN), Soekarno Integrated Science Center, Bogor, 16911, Indonesia
Corresponding author: imroahikarini[at]student.ub.ac.id

Abstract

Citrus peel essential oil has high economic value and is widely used in the food, cosmetic, and pharmaceutical industries. However, conventional extraction methods often require a long time and high energy consumption. The ohmic heating method, which uses electric current to generate internal heat in the material, is proposed as a more efficient alternative. This study aims to compare the effectiveness of the conventional hydrodistillation method with the ohmic heating method in the extraction process of essential oil from citrus peel. In this study, fresh orange peel was extracted using 2 methods, ohmic hydrodistillation with a voltage of 70 volts and conventional hydrodistillation using an infrared electric stove at a voltage of 220 volts. The parameters analysed included essential oil yield, chemical composition using GC-MS, energy efficiency, and extraction time.The results of this study show that essential oils produced from the ohmic heating distillation method have a yield of 5.67% with a distillation time of 20 minutes. The yield produced from the conventional distillation method is 3.017%, with a distillation time of 2 hours. These results indicate that ohmic heating technology is able to produce essential oils with high yields in a shorter time compared to conventional hydrodistillation.

Keywords: Citrus peel- Essential oil- hydrodistillation- ohmic heating

Topic: Agricultural and bioprocess engineering