Thin-layer modeling of convective and microwave-convective drying of oyster mushroom (Pleurotus ostreatus)
Tóm tắt
Oyster mushroom samples were dried under selected convective, microwave-convective drying conditions in a recirculatory hot-air dryer and microwave assisted hot-air dryer (2.45 GHz, 1.5 kW) respectively. Only falling rate period and no constant rate period, was exhibited in both the drying technique. The experimental moisture loss data were fitted to selected semi-theoretical thin-layer drying equations. The mathematical models were compared according to three statistical parameters, i.e. correlation coefficient, reduced chi-square and residual mean sum of squares. Among all the models, Midilli et al. model was found to have the best fit as suggested by 0.99 of square correlation coefficient, 0.000043 of reduced-chi square and 0.0023 of residual sum of square. The highest effective moisture diffusivity varying from 10.16 × 10−8 to 16.18 × 10−8 m2/s over the temperature range was observed in microwave-convective drying at an air velocity of 1.5 m/s and the activation energy was calculated to be 16.95 kJ/mol. The above findings can aid to select the most suitable operating conditions, so as to design drying equipment accordingly.
Tài liệu tham khảo
Arora S, Shivhare US, Ahmed J, Raghavan GSV (2003) Drying kinetics of Agaricus bisporus and Pleurotus florida mushrooms. Trans ASAE 46(3):721–724
Bag SK (2009) Development of process technology for preparation of bael (Aegle marmelos) pulp powder. Ph.D. Thesis. Indian Institute of Technology, Kharagpur
Bruce DM (1985) Exposed-layer barley drying, three models fitted to new data up to 150 °C. J Agric Eng Res 32:337–347
Chang ST (1999) World production of cultivated edible and medicinal mushrooms in 1997 with emphasis on Lentinus edodes (Berk.) Sing. in China. Int J Med Mushrooms 1:291–300
Decareau RV (1992) Encyclopaedia of Food Science and Technology. Wiley, New York, USA 3:1772–1778
Diamente LM, Munro PA (1991) Mathematical modeling of hot air drying of sweet potato slices. Int J Food Sci Technol 26:99
Ertekin, Yaldiz O (2004) Drying of eggplant and selection of a suitable thin layer drying model. J Food Eng 63:349–359
Funebo T, Ohlsson T (1998) Microwave-assisted air dehydration of apple and mushroom. J Food Eng 38:353–367
Garcha HS, Khanna PK, Soni GL (1993) Nutritional importance of mushrooms. Chang ST, Chiu BS (Eds.), Mushroom biology and mushroom products, proceeding of the first international conference, The Chinese University of Hong Kong 227–236
Giri SK, Prasad S (2007) Drying kinetics and rehydration characteristics of microwave-vacuum and convective hot-air dried mushrooms. J Food Eng 78:512–521
Günhan T, Demir V, Hancioglu E, Hepbasli A (2005) Mathematical modelling of drying of bay leaves. Energy Convers Manag 46(11–12):1667–1679
Henderson SM (1974) Progress in developing the thin layer drying equation. Trans ASAE 17:1167–1172
Henderson SM, Pabis S (1961) Grain drying theory. II. Temperature effects on drying coefficients. J Agric Eng Res 6:169–174
Kulshreshtha M, Singh A, Deepti, Vipul (2009) Effect of drying conditions on mushroom quality. J Eng Sci Technol 4(1):90–98
Midilli A, Kucuk H, Yapar ZA (2002) New model for single-layer drying. Dry Technol 20(7):1503–1513
Page GE (1949) Factors influencing the maximum rates of air drying shelled corn in thin layers. M.S. thesis. Department of Mechanical Engineering, Purdue University, Purdue
Panchariya PC, Popovic D, Sharma AL (2002) Thin-layer modeling of black tea drying process. J Food Eng 52:349–357
Poonnoy P, Ampawan T, Andmanjeet C (2007) Artificial neural network modeling for temperature & moisture content prediction in tomato slices undergoing microwave-vacuum drying. Food Eng Physic Prop 72(1):42–47
Saravacos GD, Maroulis ZB (2001) Transport properties of foods. Marcel Dekker, New York
Schiffman RF (1992) Microwave processing in the U.S. food industry. Food Technol 50:52–56
Silva SO, Costa SMG, Clemente E (2002) Chemical composition of Pleurotus pulmonarius (Fr.) Quel. Substrates and residue after cultivation. Braz Arch Biol Technol 45:531–535
Simal S, Mulet A, Tarrazo J, Rosello C (1996) Drying models for green peas. Food Chem 55:121–128
Thakor NJ, Sokhansanj S, Sosulski FW, Yamacopoulos S (1999) Mass and dimensional changes of single canola kernels during drying. J Food Eng 40:153–160
Togrul IT, Pehlivan D (2002) Mathematical modeling of solar drying of apricots in thin layers. J Food Eng 55:209–216
Tulek Y (2011) Drying kinetics of oyster mushroom (Pleurotus ostreatus) in a convective hot air dryer. J Agr Sci Tech 13:655–664
Tutuncu MA, Labuza TP (1996) Effect of geometry on the effective moisture transfer diffusion coefficient. J Food Eng 30:433–447
Zhang M, Tang J, Mujumadar AS, Wang S (2006) Trends in microwave-related drying of fruits and vegetables. Tren Food Sci Technol 17:524–534
Zhengfu W, Junhong S, Xiaojun L, Fang C, Guanghua Z, Jihong W, Xiaosong H (2007) Mathematical modeling on hot air drying of thin layer apple pomace. Food Res Int 40:39–46