DRYING OF BANANA SLICES UNDER VACUUM-INFRARED HEATING SYSTEM | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 37, Volume 34, Issue 4, October 2017, Page 2181-2200 PDF (1.14 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2017.97424 | ||||
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| Authors | ||||
| R. M. Kamel1; M. M. El-kholy2; I. A. Abdelmotaleb3 | ||||
| 1Assist. Researcher, Ag. Eng. Res. Inst., Ag. Res. Center, Dokki, Giza, Egypt. | ||||
| 2Head Research and Deputy Director, Ag. Eng. Res. Inst., Ag. Res. Center, Dokki, Giza, Egypt. | ||||
| 3Prof., Ag. Eng., Dept., Fac. of Ag., Kafrelsheikh Univ., Egypt. | ||||
| Abstract | ||||
| A combined vacuum-infrared (IR) drying system was tested for drying bananas slices as heat-sensitive material. Thirty two experimental runs were performed at the following conditions: drying vacuum of 0.2, 0.4, 0.6 and 0.8 bar; controlled temperatures at banana surfaces of 60, 70, 80 and 90°C; thickness of banana slices of 1mm and 5 mm. Three different thin layer drying models (Lewis’s; Henderson and Pabis’s; Logarithmic model) were examined to assess the most proper drying model for simulating and describing the drying behavior of banana slices under the studied experimental parameters. Physical quality of banana slices was evaluated in terms of color, rehydration ratio, shrinkage, crispness and hardness. The results showed that the changes of slices surface temperature have more significant effect on drying time than changes of drying vacuum and slices thickness. The Logarithmic model is recommended for describing the drying behavior and predicting the change of moisture ratio of banana slices in comparison with the other studied drying models. The combined vacuum –infrared drying method at drying vacuum of 0.8 bar, slices surface temperature of 80 °C and slices thickness of 1mm are considered the most proper drying parameters for banana slices under the studied drying system. | ||||
| References | ||||
|
Boudhrioua, N., N. Bahloul, B.I. Slimen and N. Kechaou (2009). Comparison on the total phenol contents and the color of fresh and infrared dried olive leaves. Industrial Crops and Products, 29: 412–419.
Henderson, S.M. and S. Pabis (1961). Grain drying theory II: temperature effect on drying coefficients. J Agric Eng Res, 6: 1111–1122.
Jaya, S. and H. Das (2003). A vacuum drying model for mango pulp. Dry Technology, 21: 1215–1234.
Junlakan, W. (2014). Effect of Drying Kinetics on the Quality of Vacuum-Dried Banana, Pineapple and. Apple Slices. Ph.D. Thesis, Chemical Engineering, Songkla University, Thailand.
Lewis, W.K. (1921). The rate of drying of solid materials. Ind Eng Chem, 13:427–443.
Limpaiboon, K. (2011). Effects of temperature and slice thickness on drying kinetics of pumpkin slices. Walailak Journal of Science and Technology, 8(2): 159-166.
MoA (2014). Horticulture Research Institute Pamphlet. Agric. Res. Center. Ministry of Agric.
Nimmol, C., S. Devahastin, T. Swasdisevi, S. Soponronnarit (2007). Drying of banana slices using combined low-pressure superheated steam and far-infrared radiation. Journal of Food Engineering, 8(3): 624–633.
Pangavhane, D.R.; R.L. Sawhnew and P.N. Sarsavadia (2000). Drying kinetic studies on single later Thompson seedless grape controlled heated air conditions. Journal of Food Engineering and Preservation, 24: 335-352.
Panyawong, S. and S. Devahastin (2007). Determination of deformation of a food product undergoing different drying methods and conditions via evolution of a shape factor. Journal of Food Engineering, 78(1): 151-161.
Sarsavadia, P.N.; R.L. Sawhney; D.R. Pangavhane; and S.P. Singh (1999). Drying behavior of brined onion slices. Journal of Food Engineering, 40: 219-226.
Swasdisevi, T., S. Devahastin, R. Ngamchum and S. Soponronnarit (2007). Optimization of a drying process using infrared vacuum drying of Cavendish banana slices. Songklanakarin Journal of Science and Technology, 29(3): 809-816.
Thomkapanich, O. (2006). Study of intermittent low-pressure superheated steam and vacuum drying of banana. Master thesis, Department of Food Engineering, King University of Technology Thonburi.
Thuwapanichayanan, R., S. Prachayawarakorn and S. Soponronnarit (2012). Effects of foaming agents and foam density on drying characteristics and textural property of banana foams. Journal of Food Science and Technology, 47(2): 348-357.
Timoumi, S., D. Mihoubi and F. Zagrouba (2007). Shrinkage, vitamin C degradation and aroma losses during infrared drying of apple slices. LWT-Food Science and Technology 40, 1648–1654.
Wanyo, P., S. Siriamornpun and N. Meeso (2011). Improvement of quality and antioxidant properties of dried mulberry leaves with combined far-infrared radiation and air convection in Thai tea process. Food and Bioproducts Processing, 89: 22–30.
Yagcioglu, A., A. Degirmencioglu and F. Cagatay (1999). Drying characteristic of laurel leaves under different conditions. In: Bascetincelik A (ed) Proceeding of the 7th international congress on agricultural mechanization and energy, Adana.
Yamsaengsung, R., T. Ariyapuchai and K. Prasertist (2011). Effects of vacuum frying on structural changes of bananas. Journal of Food Engineering, 106(4): 298-305.
Zakipour, E. and Z. Hamidi (2011). Vacuum drying characteristics of some vegetables. Iranian Journal of Chemistry and Chemical Engineering, 30(4): 97-105. | ||||
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