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The Scientific World Journal
Volume 2014, Article ID 439431, 10 pages
http://dx.doi.org/10.1155/2014/439431
Research Article

Development of Solar Drying Model for Selected Cambodian Fish Species

1Department of Sustainable Technologies, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, Suchdol, 16521 Praha 6, Czech Republic
2Department of Food Biotechnology, Faculty of Agro-Industry, Royal University of Agriculture, P.O. Box 2696, Khan Dangkor, Phnom Penh, Cambodia
3Department of Economics and Development, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, Suchdol, 16521 Praha 6, Czech Republic

Received 23 June 2014; Accepted 7 August 2014; Published 27 August 2014

Academic Editor: Hua Bai

Copyright © 2014 Anna Hubackova et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A solar drying was investigated as one of perspective techniques for fish processing in Cambodia. The solar drying was compared to conventional drying in electric oven. Five typical Cambodian fish species were selected for this study. Mean solar drying temperature and drying air relative humidity were 55.6°C and 19.9%, respectively. The overall solar dryer efficiency was 12.37%, which is typical for natural convection solar dryers. An average evaporative capacity of solar dryer was 0.049 kg·h−1. Based on coefficient of determination (), chi-square () test, and root-mean-square error (RMSE), the most suitable models describing natural convection solar drying kinetics were Logarithmic model, Diffusion approximate model, and Two-term model for climbing perch and Nile tilapia, swamp eel and walking catfish and Channa fish, respectively. In case of electric oven drying, the Modified Page 1 model shows the best results for all investigated fish species except Channa fish where the two-term model is the best one. Sensory evaluation shows that most preferable fish is climbing perch, followed by Nile tilapia and walking catfish. This study brings new knowledge about drying kinetics of fresh water fish species in Cambodia and confirms the solar drying as acceptable technology for fish processing.