MICROWAVE DRYING OF ALOE VERA (ALOE BARBADENSIS MILLER): MATHEMATICAL MODELING, KINETICS AND MASS TRANSFER ASPECTS
DOI:
https://doi.org/10.24297/jac.v12i22.120Keywords:
Microwave, Drying, Aloe vera, Moisture, energy.Abstract
Aloe vera has extensive application in food and pharmaceutical industry in fact contains 97 percent of water. It’s perishable in nature and poor shelf life makes it essential to study the drying characteristics of aloe vera. The objective of this present study is to investigate the effect of different microwave (MW) respective power levels (180 , 360 ,540 , 720 and 900 Watts ) regarding the moisture ratio (MR), drying rate (DR), effective moisture diffusivity (EMD), specific energy consumption (SEC) and drying efficiency (DE) of aloe vera. The drying process took 70 - 26 .5 minutes for attainment of equilibrium moisture content. A mathematical model done by Midilli et al. is considered to be the best and most suitable for a drying conditions among the various thin layer models. The effective moisture diffusivity value at 180 Watts (W) of MW power was found as 4.5 × 10-8 m2/sec. while it was raised to 9.45 x10-7 m2/sec at 900 W in this study. Lowest energy consumption 1.4 MJ/Kg water and maximum drying efficiency occurred at higher microwave power level 900 Watts due to less drying duration (time).
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References
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2. Simal, S., FemenÃa, A., Llull, P. and Roselló, C., (2000) Dehydration of aloe vera: simulation of drying curves and evaluation of functional properties. J Food Eng, 43(2): 109–114.
3. Vega, A., Uribe, E., Lemus, R. and Miranda, M., (2007) Hot-air drying characteristcs of Aloe vera (Aloe barbadensis Miller) and influence of temperature on kinetics parameters. Lebensm Wiss Technol, 40(10): 1698–1707.
4. Doymaz, I. (2006) Thin-layer drying behaviour of mint leaves. Journal of Food Engineering 74(3): 370–375.
5. Yaldız O; Ertekin C. 2001.Thin layer solar drying of some different vegetables. Drying Technology, 19(3), 583–596.
6. Drouzas, A. E., & Schubert, H. (1996) Microwave application in vacuum drying of fruits. Journal of Food Engineering, 28, 203±209.
7. Kaensup W, Chituma S, Wongwises S. (2002) Experimental study on drying chilli in a combined microwave vacuum-rotary drum dryer. Dry Technol;20(10):2067–79.
8. Vega, A., Uribe, E., Lemus, R. and Miranda, M., 2007. Hot-air drying characteristcs of Aloe vera (Aloe barbadensis Miller) and influence of temperature on kinetics parameters. Lebensm Wiss Technol, 40(10): 1698–1707.
9. Yaldız O; Ertekin C. (2001) Thin layer solar drying of some different vegetables. Drying Technology, 19(3), 583–596.
10. Drouzas, A. E., & Schubert, H. (1996) Microwave application in vacuum drying of fruits. Journal of Food Engineering, 28, 203±209.
11. Tulasidas T N; Ratti C; Raghavan G S V. (1997) Modelling of microwave drying of grapes. Canadian Agricultural Engineering,39(1), 57–67.
12. Bouraout M; Richard P; Durance T, (1994) Microwave and convective drying of potato slices. Journal of Food Process Engineering, 17, 353–363.
13. Ozbek, B. and Dadali, G. (2007) Thin-layer drying characteristics and modelling of mint leaves undergoing microwave treatment. Journal of Food Engineering 83(4): 541-549.
14. Rodrigues R, Lombrana JI, Kamel M, Elvira C. (2005) Kinetics and quality study of mushroom drying under microwave and vacuum. Dry Technol;23(9–11):2197–213.
15. Maskan, M. (2000) Microwave/air and microwave finish drying of banana. Journal of Food Engineering 44(2): 71–78.
16. Sharma, G.P. and Prasad, S. (2001) Drying of garlic (Allium sativum) cloves by microwave–hot air combination. Journal of Food Engineering 50(2): 99–105.
17. Kaensup W, Chituma S, Wongwises S. (2002) Experimental study on drying chilli in a combined microwave vacuum-rotary drum dryer. Dry Technol;20(10):2067–79.
18. Maskan M, (2000) Microwave/air and microwave finish drying of banana. Journal of Food Engineering, 44, 71–78.
19. Soysal, Y. (2004) Microwave drying characteristics of parsley. Biosystems Engineering 89(2): 167–173.
20. Sharma, G.P. and Prasad, S. (2001) Drying of garlic (Allium sativum) cloves by microwave–hot air combination. Journal of Food Engineering 50(2): 99–105.
21. Akpinar, E.K., (2008) Mathematical modeling and experimental investigation on sun and solar drying of white mulberry. Ministry Sci.Technol. 22, 1544–1553.
22. Dadali, G., Apar, D.K. and Ozbek, B. (2007) Estimation of effective moisture diffusivity of okra for microwave drying. Drying Technology 25(9): 1445-1450. Decareau, R.V. 1992.
23. Gupta, P., Ahmet, J., Shivhare, U.S. and Raghavan, G.S.V. (2002) Drying characteristics of red chilli. Drying Technology 20 (10): 1975–1987.
24. Ozkan, A.I., Akbudak, B. and Akbudak, N. (2007) Microwave drying characteristics of spinach. Journal of Food Engineering 78(2): 577–583.
25. Arslan, D., Ozcan, M.M., (2010) Study the effect of sun, oven and microwave drying on quality of onion slices. LWT – Food Sci. Technol. 43, 1121–1127.
26. Darvishi H, Hosainpour A, Nargesi F (2012) Ohmic Heating Behaviour and Electrical Conductivity of Tomato Paste. J Nutr Food Sci 2:167.
27. Darvishi H, Hosainpour A, Nargesi F (2012) Ohmic Heating Behaviour and Electrical Conductivity of Tomato Paste. J Nutr Food Sci 2:167.
28. Dadali, G., Apar, D.K. and Ozbek, B. (2007). Estimation of effective moisture diffusivity of okra for microwave drying. Drying Technology 25(9): 1445-1450. Decareau, R.V. 1992.
29. Pillai, M.G., (2013).Thin layer drying kinetics, characteristics and modeling of plaster of paris. Chem. Eng. Res. Des.
30. Simal, S., FemenÃa, A., Llull, P. and Roselló, C., 2000. Dehydration of aloe vera: simulation of drying curves and evaluation of functional properties. J Food Eng, 43(2): 109–114.
31. Vega, A., Uribe, E., Lemus, R. and Miranda, M., 2007. Hot-air drying characteristcs of Aloe vera (Aloe barbadensis Miller) and influence of temperature on kinetics parameters. Lebensm Wiss Technol, 40(10): 1698–1707.
32. Chang, X.L., Wang, Ch., Feng, Y. and Liu, Z., (2006) Effects of heat treatments on the stabilities of polysaccharides substances and barbaloin in gel juice from Aloe vera Miller. J Food Eng,75(2): 245–251.
33. Simal, S., FemenÃa, A., Llull, P. and Roselló, C.,(2000). Dehydration of aloe vera: simulation of drying curves and evaluation of functional properties. J Food Eng, 43(2): 109–114.
34. Sharma, G.P. and Prasad, S. (2001). Drying of garlic (Allium sativum) cloves by microwave–hot air combination. Journal of Food Engineering 50(2): 99–105.
35. Araszkiewicz M; Koziol A; Oskwarek A; Lupinski M , (2004) Microwave drying of porous materials. Drying Technology, 22(10), 2331–2341.
36. Yaldız O; Ertekin C. (2001).Thin layer solar drying of some different vegetables. Drying Technology, 19(3), 583–596.
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Published
2016-12-15
How to Cite
Srinivasan, G., & Baskar, R. (2016). MICROWAVE DRYING OF ALOE VERA (ALOE BARBADENSIS MILLER): MATHEMATICAL MODELING, KINETICS AND MASS TRANSFER ASPECTS. JOURNAL OF ADVANCES IN CHEMISTRY, 12(22), 5437–5445. https://doi.org/10.24297/jac.v12i22.120
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