School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, Brazil.
School of Applied Sciences (FCA), University of Campinas (UNICAMP), Limeira, SP, Brazil.
Food Res Int. 2022 Aug;158:111547. doi: 10.1016/j.foodres.2022.111547. Epub 2022 Jun 24.
The valorization of the by-product of the agro-industrial processing of jabuticaba (Myrciaria cauliflora) was studied by hydrothermal pretreatment. Experiments were carried out in a semi-continuous flow-through process for 45 min, at 15 MPa, a water flow rate of 5 mL min, and at different temperatures (60 - 210 °C). The results demonstrate that fructose and glucose were the sugars with the highest concentration in all analyzed treatments. Arabinose and cellobiose were obtained only at higher temperatures (above 130 °C), demonstrating that they were released from the hydrolysis of polysaccharides. The highest cyanidin-3-glucoside yield (1.88 mg g) was achieved at 60 °C. The treatments at 135 and 210 °C promoted the degradation of cyanidin-3-glucoside, leading to yields lower than 0.05 mg g. At 60 °C, it was possible to recover 74.18 mg g of glucose, 103.77 mg g of fructose, 30.75 mg g of citric acid, and 1.88 mg g of cyanidin-3-glucoside, without the presence of furfural and 5-hydroxymethylfurfural. The results suggest that hydrothermal pretreatment is a promising eco-friendly technology to recover sugars, organic acids, and anthocyanins from jabuticaba by-products in a circular economy framework.
本研究采用水热预处理技术对巴西莓（Myrciaria cauliflora）农业加工副产物进行了增值化利用。实验在半连续流动体系中进行了 45 分钟，反应压力为 15 MPa，水流量为 5 mL/min，温度分别为 60-210°C。结果表明，所有处理中果糖和葡萄糖的浓度最高。阿拉伯糖和纤维二糖仅在较高温度（130°C 以上）下获得，表明它们是从多糖水解中释放出来的。在 60°C 时，矢车菊素-3-葡萄糖苷的产率最高（1.88 mg/g）。135 和 210°C 的处理促进了矢车菊素-3-葡萄糖苷的降解，导致产率低于 0.05 mg/g。在 60°C 时，可以回收 74.18 mg/g 的葡萄糖、103.77 mg/g 的果糖、30.75 mg/g 的柠檬酸和 1.88 mg/g 的矢车菊素-3-葡萄糖苷，同时没有糠醛和 5-羟甲基糠醛的生成。这些结果表明，水热预处理是一种有前途的环保技术，可以在循环经济框架内从巴西莓副产物中回收糖、有机酸和花青素。
