In the present study, ultrasound-assisted lye peeling (ULP) was applied in peaches (Prunus persica L. Batsch) and compared with other methods. Different lye concentrations, ultrasonic power density, peeling time and temperature were investigated during ULP process. To evaluate peeling effectiveness, peeled thickness, peeling loss, peach color and peeling performance score were determined. The effects of ULP on quality of peaches were also considered to determine the optimum peeling process. As a result, Lye concentration of 0.50 mol/L combined with a power density of 270 W/L for 90 s at 90 °C demonstrated the optimal peeling effectiveness. Compared with manual peeling, hot water peeling (90 °C, no lye), ultrasound-assisted hot water peeling (90 °C, no lye, 270 W/L) and lye peeling (90 °C, alkali concentration of 0.50 mol/L), ULP showed the highest peeling performance score accompanied with appropriated peeling loss and peeled thickness. The color, soluble solids and titratable acidity for ULP peaches showed slight difference from peaches peeled by other methods.

Industrial relevance

Traditional peeling methods especially LP not only led to excessive loss of pulp but also damaged the environment to a great extent. Ultrasound as a green technology enhanced mass transfer and heat transfer, further promoting the efficiency of peeling process. In this study, ULP showed higher peeling performance with reduced peeling time, and the peaches quality was guaranteed, demonstrating the potential of ULP as an alternative to conventional peach peeling methods.

中文翻译：

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桃的超声波辅助碱液剥皮及与常规方法的比较

在本研究中，在桃子（李子）中应用了超声波辅助的碱液剥皮（ULP）。L. Batsch），并与其他方法进行了比较。在ULP过程中，研究了不同的碱液浓度，超声功率密度，剥离时间和温度。为了评估剥离效果，确定了剥离厚度，剥离损失，桃色和剥离性能得分。还考虑了ULP对桃子品质的影响，以确定最佳的去皮过程。结果，在90°C下90 s的碱液浓度为0.50 mol / L，功率密度为270 W / L，证明了最佳的剥离效果。与手动剥离相比，热水剥离（90°C，无碱液），超声辅助热水剥离（90°C，无碱液，270 W / L）和碱液剥离（90°C，碱浓度为0.50 mol / L），ULP表现出最高的剥离性能得分，同时具有适当的剥离损失和剥离厚度。

行业相关性

传统的剥皮方法，尤其是LP，不仅导致纸浆损失过多，而且严重破坏了环境。超声波作为一种绿色技术，可以增强传质和传热，进一步提高剥离过程的效率。在这项研究中，ULP表现出更高的削皮性能，同时减少了削皮时间，桃子的品质得到了保证，证明了ULP可以替代传统的桃子削皮方法。