UPV, Universitat Politècnica de València. Department of Food Technology. Camí de Vera, s/n, 46022, Valencia, Spain.
UdG, University of Girona, Institute of Food and Agricultural Technology (INTEA), XIA (Catalonian Network on Food Innovation), Escola Politècnica Superior, C/ Maria Aurèlia Capmany 61, 17003 Girona, Spain.
Ultrason Sonochem. 2022 May;86:106011. doi: 10.1016/j.ultsonch.2022.106011. Epub 2022 Apr 22.
Nowadays, there is increasing interest in developing strategies for the efficient and sustainable use of animal by-products, such as pork liver. In order to stabilize the product, a prior dehydration stage may be required due to its high perishability. The water removal process of pork liver is energy costly and time consuming, which justifies its intensification using novel technologies. In this sense, the aim of this study was to assess the effect of the airborne application of power ultrasound on the hot air-drying of pork liver. For that purpose, drying experiments were carried out at 30, 40, 50, 60 and 70 °C on pork liver cylinders at 2 m·s with (US) and without ultrasonic application (AIR). The drying process was modeled from the diffusion theory and, in the dried pork liver, the protein solubility was analyzed in order to determine the effect of drying on the protein quality. The ultrasound application increased the drying rate, shortening the drying time by up to 40% at 30 °C. The effect of power ultrasound at high temperatures (60 and 70 °C) was of lesser magnitude. Drying at 70 °C involved a noticeable reduction in the protein solubility for dried liver, while the impact of ultrasound application on the solubility was not significant (p > 0.05).
如今，人们越来越关注开发有效和可持续利用动物副产品（如猪肝）的策略。由于猪肝易腐，为了稳定产品，可能需要先进行脱水阶段。猪肝的脱水过程耗费大量能源且耗时较长，因此有理由使用新技术来强化这一过程。从这个意义上说，本研究的目的是评估空气传播功率超声对猪肝热风干燥的影响。为此，在 2 m·s 的速度下，以 30、40、50、60 和 70°C 的温度对猪肝圆柱体进行了干燥实验，（US）和没有超声应用（AIR）。干燥过程是根据扩散理论进行建模的，并且在干燥的猪肝中分析了蛋白质溶解度，以确定干燥对蛋白质质量的影响。超声应用提高了干燥速率，在 30°C 时将干燥时间缩短了多达 40%。在高温（60 和 70°C）下，功率超声的作用较小。在 70°C 下干燥会导致干燥肝脏的蛋白质溶解度明显降低，而超声应用对溶解度的影响并不显著（p > 0.05）。
