Abstract Local fish markets are often saturated during periods of full production. Solar drying offers a suitable alternative to reduce losses of surpluses, and to preserve products for a longer period. In this respect, this work was carried out to study the effect of the air indirect solar convective drying process on the dehydration kinetics of anchovy. Experimental drying kinetics was measured at four air temperatures (50, 60, 70 and 80 °C) and for a constant air flow of 300 m3/h. The moisture desorption isotherms of the anchovy were determined at three temperatures (30, 40 and 50 °C), using the static gravimetric method to determine the optimum water activity for conservation of the nets anchovy. Experimental results showed that the drying kinetics of the anchovy was accelerated synchronously with the increase of the air temperature. The value of optimal water activity for conservation of anchovy is aw = 0.30 and the desorption isotherms suggest a non spontaneous process. Nine drying models were adapted to the drying data; the Logarithmic model allowed better adaptation than the other models. The effective diffusion coefficient value Deff determined by Fick’s second law varied from 3.84 10−9 to 5.60 10−9 m2/s and the activation energy value was Ea = 12.90 kJ/mol.

中文翻译：

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通过对流太阳干燥保护摩洛哥凤尾鱼的物理化学研究

摘要 当地鱼市在全面生产期间往往会饱和。太阳能干燥提供了一种合适的替代方案，可以减少剩余物的损失，并延长产品的保存时间。在这方面，开展这项工作是为了研究空气间接太阳能对流干燥过程对凤尾鱼脱水动力学的影响。在四种空气温度（50、60、70 和 80 °C）和 300 m3/h 的恒定空气流量下测量了实验干燥动力学。鳀鱼的水分解吸等温线是在三个温度（30、40 和 50 °C）下确定的，使用静态重量法确定保存网鳀鱼的最佳水分活度。实验结果表明，鳀鱼的干燥动力学随着气温的升高而同步加速。保存凤尾鱼的最佳水分活度值为 aw = 0.30，解吸等温线表明这是一个非自发过程。九种干燥模型适用于干燥数据；对数模型比其他模型允许更好的适应。由菲克第二定律确定的有效扩散系数值 Deff 从 3.84 10-9 到 5.60 10-9 m2/s 变化，活化能值为 Ea = 12.90 kJ/mol。