| Investigating Effective Engineering Parameters in Extraction With Ohmic Heating Under Atmospheric Pressure And Under Vacuum From Hops Plant |
| Paper ID : 1236-NICAME1402 |
| Authors: |
|
Ali Fadavi *1, nastaran latifi2, Mohammad Zarein3 1Department of Food Technology, Aburaihan College, University of Tehran, Tehran, Iran 2Graduated from Master's degree, Department of Food Technology, Aburihan Campus, University of Tehran 3Biosystems Engineering Department- Tarbiat Modares University |
| Abstract: |
| Essential oils can be extract by different methods. The common method are water distillation, steam distillation and solvent extraction, that have some drawbacks. In order to increase the quality of essential oil and extracts, improve extraction efficiency, also reduce process costs and time, new extraction methods were considered. In this research, hop plant essential oil was extracted by ohmic heating method under atmospheric pressure and vacuum condition. The heating rate and electrical energy consumption during the extraction process were investigated. For this purpose, The experimental design was conducted under three vacuum pressure (zero, 0.2 and 0.4 bar), three voltage levels of 60, 50 and 70 volts and three levels of salt (0.1, 0.2 and 0.3 percent). The results indicated that the lowest amount of energy consumption belonged to the conditions; 0.4 bar, the voltage of 50 volts and salt level of 0.1%. The examined parameters had a significant effect on the heating rate and with the increase in voltage and salt percentage, the ohmic heating rate was higher, the highest rate of ohmic heating was in the conditions of atmospheric pressure and voltage of 70 volts. |
| Keywords: |
| Ohmic Heating, Energy consumption, Heating rate, Hops, Essential Oil Extraction. |
| Status : Paper Accepted (Oral Presentation) |
