| The effect of infrared radiation drying with ultrasound pretreatment on the drying kinetics of Falcaria |
| Paper ID : 1207-NICAME1402 |
| Authors: |
|
Fatemeh khayyatinejhad agh gonbad1, Adel Hosainpour *1, Abolfazl Akhoundzadeh Yamchi2, Ariga Moradians1 1department of biosystem engineering, agriculture faculty,Urmia university, Urmia, Iran 2Department of Biosystem Engineering, Urmia University, Urmia, Iran |
| Abstract: |
| Plants with green leaves are seasonal and perishable due to high humidity. Proper maintenance can prevent the wastage of these products and increase their availability outside the production season. With controlled and proper drying, nutrients as well as aroma and color can be preserved in the dried leaves. The purpose of this research is to investigate the effect of drying falcaria with an infrared dryer with the help of ultrasound pretreatment on drying kinetics, color changes, reabsorption of moisture, and thermodynamic properties. Falcaria leaves were dried in an infrared dryer at three temperatures of 40, 45, and 50 C and three ultrasonic pretreatment times of zero, 5, and 10 minutes until reaching a moisture content of 10% wet based. The results showed that increasing the temperature and duration of ultrasound pretreatment increases the drying speed and drying rate. The effective moisture diffusion coefficient for falcaria in all samples has a direct relationship with the ultrasonic pretreatment and temperature so the moisture diffusion coefficient increased with the increase in temperature and ultrasonic pretreatment. The activation energy during drying increased with the increase in the duration of ultrasound pretreatment. The changes in color and brown index of falcaria leaves increased with increasing temperature and decreasing duration of ultrasound pretreatment, while the amount of chroma decreased. Enthalpy and entropy decreased with increasing drying temperature and decreasing pre-sonication time, while Gibbs free energy increased. |
| Keywords: |
| Falcaria, Infrared dryer, Color, Ultrasound waves, Rehydration ratio, Thermodynamic properties. |
| Status : Paper Accepted (Poster Presentation) |
