Vacuum-assisted microwave drying characteristics of green bell pepper

Vivek Kumar ,
Vivek Kumar
Contact Vivek Kumar

Department of Agricultural and Food Engineering, Indian Institute of Technology , West Bengal , India

Shanker L. Shrivastava
Shanker L. Shrivastava

Department of Agricultural and Food Engineering, Indian Institute of Technology , West Bengal , India

Published: 18.04.2017.

Volume 6, Issue 1 (2017)

pp. 67-81;

https://doi.org/10.7455/ijfs/6.1.2017.a7

Abstract

Chopped green bell pepper pieces were blanched (95 °C, 5 min) and chemically pretreated (1% potassium metabisulphite solution, 25 min at room temperature) before drying in hot air dryer (HAD) at various temperature ranges (60 – 80 °C). Three vacuum levels (200, 400, 600 mm Hg) and microwave power levels (100, 200, 300 W) were also used to dry green bell pepper samples in a vacuum-assisted microwave (VAM) (2.45 GHz, 0.8 kW) dryer. VAM drying methods offered a maximum reduction by four to five times in drying time as compared to that in HAD. The logarithmic model was found to have the best fit based on high R2 and small values of reduced χ 2 and RMSE. VAM method has higher values for effective moisture diffusivity (Deff ) and lower values for activation energy (Ea), in comparison to the HAD method.

Keywords

References

1.
Chemistry. (2):121–8.
2.
Lian G, Harris C, Evans R, Warboys M. Coupled heat and moisture transfer during microwave vacuum drying. Journal of Microwave Power and Electromagnetic Energy. 1997;(1):34–44.
3.
Minaei S, Motevali A, Ahmadi E, Azizi M. Mathematical models of drying pomegranate arils in vacuum and microwave dryers. Journal of agricultural Science and Technology. 2011;(2):311–25.
4.
Mudgett R. IFT BASIC SYMPOSIUM SERIES. Symp of the 49th annual meeting of the inst of food technologists : Advances in bio-process and food-process engineering. 1990;359–404.
5.
Mujumdar A. Advances in drying. 1980;
6.
Saravacos G, Maroulis Z. Transport properties of foods. 2001;
7.
Schiffmann R. Microwave processing in the US food industry: Dielectric and ohmic sterilization. Food Technology. 1992;(12):50–2.
8.
Sharma G, Prasad S. Drying of garlic (Allium sativum) cloves by microwavehot air combination. Journal of Food Engineering. 2001;(2):99–105.
9.
Simal S, Mulet A, Tarrazo J, Rossello C. Drying models for green peas. Food IJFS. 1996;67–81.
10.
Lewis W. The rate of drying of solid materials. Journal of Industrial & Engineering Chemistry. 1921;(5):427–32.
11.
Taheri-Garavand A, Rafiee S, Keyhani A. Study on effective moisture diffusivity, activation energy and mathematical modeling of thin layer drying kinetics of bell pepper. Australian Journal of Crop Science. 2011;(2):128–31.
12.
Togrul İ, Pehlivan D. Mathematical modelling of solar drying of apricots in thin layers. Journal of Food Engineering. 2002;(3):209–16.
13.
Tulek Y. Drying kinetics of oyster mushroom (pleurotus ostreatus) in a convective hot air dryer. Journal of Agricultural Science and Technology. 2011;(5):655–64.
14.
Tunde-Akintunde T, Ogunlakin G. Influence of drying conditions on the effective moisture diffusivity and energy requirements during the drying of pretreated and untreated pumpkin. Energy Conversion and Management. 2011;(2):1107–13.
15.
Wang Z, Sun J, Liao X, Chen F, Zhao G, Wu J, et al. Mathematical modeling on hot air drying of thin layer apple pomace. Food Research International. 2007;(1):39–46.
16.
Wesley B, Chakraverty A, Sukumaran C. Dehydration of chillies and their quality determination. The Andhra Agricultural Journal. 2002;(1 & 2):93–6.
17.
Woodroof J. Springer Science & Business Media. 2012;67–81.
18.
Arslan D, Ozcan M. Dehydration of red bell-pepper (capsicum annuum l.): change in drying behavior, colour and antioxidant content. Food and Bioproducts Processing. 2011;(C4):504–13.
19.
Kiranoudis C, Tsami E, Maroulis Z. Microwave vacuum drying kinetics of some fruits. Drying Technology. 1997;(10):2421–40.
20.
Khraisheh M. Investigation and modelling of combined microwave and air drying. (Doctoral dissertation. 1996;
21.
Jayaraman K, Gopinathan V, Pitchamuthu P, Vijayaraghavan P. The preparation of quickcooking dehydrated vegetables by high temperature short time pneumatic drying. International Journal of Food Sci-ence & Technology. 1982;(6):669–78.
22.
Henderson S, Pabis S. Grain drying theory i. temperature effect on drying coefficient. Journal of Agricultural Engineering Research. 1961;(3):169–74.
23.
Guine R, Fernandes R. Analysis of the drying kinetics of chestnuts. Journal of Food Engineering. 2006;(3):460–7.
24.
Govindarajan V, Salzer U. Capsicum-production, technology, chemistry, and quality part 1: history, botany, cultivation, and primary processing. C R C Critical Reviews in Food Science and Nutrition. 1985;(2):109–76.
25.
Giri S, Prasad S. Drying kinetics and rehydration characteristics of microwave-vacuum and convective hot-air dried mushrooms. Journal of Food Engineering. 2007;(2):512–21.
26.
Geankoplis C. Transport processes and separation process principles (includes unit operations) fourth edition (Fourth). 2003;
27.
Doymaz I, Ismail O. Drying and rehydration behaviors of green bell peppers. Food Science and Biotechnology. 2010;(6):1449–55.
28.
Diamante L, Munro P. International Journal of Food Science and Technology. 1991;(1):99–109.
29.
Darvishi H, Khoshtaghaza M, Najafi G, Nargesi F. article 4975 8f9d927bcae292dc5f1e5f15ca750036. Agricultural Science and Technology. 2013;(3):789–95.
30.
Dadali G, Apar D, Ozbek B. Microwave drying kinetics of okra. Drying Technology. 2007;(4–6):917–24.
31.
Cui Z, Xu S, Sun D. Dehydration of garlic slices by combined microwave-vacuum and air drying. Drying Technology. 2003;(7):1173–84.
32.
Chauhan A, Srivastava A. Optimizing drying conditions for vacuum-assisted microwave drying of green peas (pisum sativum l.) Drying Technology. 2009;(6):761–9.
33.
Bhattacharya M, Srivastav P, Mishra H. Thin-layer modeling of convective and microwave-convective drying of oyster mushroom (pleurotus ostreatus). Journal of Food Science and Technologymysore. 2015;(4):2013–22.

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