Food Engineering and Technology Department, São Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), Campus São José do Rio Preto, Cristóvão Colombo Street, 2265, São José do Rio Preto, São Paulo State 15054-000, Brazil; Grupo de Análisis y Simulación de Procesos Agroalimentarios, Departamento de Tecnología de Alimentos, Universitat Politècnica de València (UPV), Camino de Vera, s/n, Valencia 46071, Spain.
Grupo de Investigación Microestructura y Química de Alimentos, Departamento de Tecnología de Alimentos, Universitat Politècnica de València (UPV), Camino de Vera, s/n, Valencia 46071, Spain.
Ultrason Sonochem. 2021 Jan;70:105318. doi: 10.1016/j.ultsonch.2020.105318. Epub 2020 Aug 31.
Improving the actual acid hydrolysis of cassava bagasse (CB) with the assistance of high-intensity ultrasound (US) was aimed in comparison with mechanical agitation (AG). The kinetics of reducing and total sugar release were mathematically modeled. The acoustic field characterization and apparent viscosity of the suspensions were correlated. Moreover, microscopic analyses (visible, fluorescence and polarized light) were carried out to identify changes produced by the treatments. Both AG and US-treatments showed themselves to be effective at hydrolyzing CB. However, US-experiments reached equilibrium in the reducing sugar release process earlier and obtained slightly higher values of total sugars released. The Naik model fitted the experimental data with good accuracy. A greater loss in the birefringence of the starch granules and the degradation of lignocellulosic matter was also observed in US-assisted hydrolysis. The actual acoustic power applied was reduced after hydrolysis, probably due to the increase in the apparent viscosity of the resulting suspensions.
旨在通过高强度超声（US）辅助提高木薯渣（CB）的实际酸水解，与机械搅拌（AG）进行比较。对还原糖和总糖释放的动力学进行了数学建模。对声场特性和悬浮液的表观粘度进行了相关分析。此外，还进行了微观分析（可见、荧光和偏振光），以确定处理产生的变化。AG 和 US 处理都能有效地水解 CB。然而，US 实验在还原糖释放过程中更早达到平衡，并且获得了稍高的总糖释放值。Naik 模型很好地拟合了实验数据。在超声辅助水解过程中，淀粉颗粒的双折射损失更大，木质纤维素物质降解更多。实际施加的声功率在水解后降低，可能是由于所得悬浮液的表观粘度增加所致。
