Studying the Drying Kinetics of Fresh-water Crayfish (Austropotamobius pallipes) on Thin-layers
Authors: Egbe EW, Zibokere DS
DOI Info: http://doi.org/10.5281/zenodo.5048411
The drying behaviour of fresh-water crayfish (Austropotamobius pallipes) was investigated using a laboratory convective oven dryer, with the cabinets arranged in thin-layers. Drying air temperatures ranging from 60 – 100 ? were applied, varying in multiples of 10 ? with unregulated laboratory room air velocities. The initial moisture content of all the samples was 85% db. The investigation showed a drying rate profile that increased with increasing drying temperatures. Drying data from the experiments were fitted to seven empirical thin-layer drying models, and the suitability of individual model was validated using statistical parameters (coefficient of determination, (R2); root mean square error, (RMSE) and reduced chi-square (?2)). The Midilli model was found to perform satisfactorily in describing the drying behaviour of the fresh-water crayfish samples at the chosen temperature levels. The final effective moisture diffusivity of the samples during the drying experiments was 6.675 x 10-10 m2/s, and the temperature related activation energy of diffusion was found to be 28.48 kJ/mol. Drying occurred mainly in the falling rate period, and the characterizing drying curves were exponential with increase in drying temperatures.
Affiliations: Department of Agricultural and Environmental Engineering, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria.
Keywords: Fresh-water Crayfish, Thin-layer Drying, Drying Kinetics, Modelling, Effective Diffusivity, Activation Energy
Published date: 2021/06/30