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Optimizing the antioxidant biocompound recovery from peach waste extraction assisted by ultrasounds or microwaves.
Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2019-12-31 , DOI: 10.1016/j.ultsonch.2019.104954
S Plazzotta 1 , R Ibarz 2 , L Manzocco 1 , O Martín-Belloso 2
Affiliation  

The possibility to valorize peach juice waste, either frozen or air-dried, through microwave (MAE) and ultrasound assisted extraction (UAE) was evaluated. MAE power, UAE amplitude and time were optimized using a 22-factorial design. For frozen waste, optimal MAE (540 W, 50 s) and UAE (23%, 120 s) processes gave extracts presenting analogous content (on 100 g dry matter) of polyphenols (309-317 mg GAE), flavonoids (94-120 mg QE), anthocyanins (8-9 mg CGE), and similar antioxidant activity (2.1-2.2 mg TE). Extracts from dried waste resulted higher in polyphenols (630-670 mg GAE) but lower in flavonoids (75-90 mg QE), anthocyanins and vitamin C (not detectable). Although developing an energy density 2-fold higher than that of UAE, MAE more efficaciously extracted vitamin C (108 mg/100 g dm) and required half extraction time (50 s). MAE would also be less impactful than UAE in terms of greenhouse gas emission and energy requirements on industrial scale. The industrial valorization of peach waste through the application of microwave or ultrasound assisted extraction requires quantitative data, able to encourage company interest and investment. This study not only identifies optimal MAE and UAE parameters to assist the extraction of peach waste bioactive compounds but also provides a preliminary estimation of the potential economic and environmental impact on an industrial scale of these technologies.

中文翻译:

在超声波或微波的辅助下,从桃子废料提取物中优化抗氧化剂生物化合物的回收率。

评估了通过微波(MAE)和超声辅助提取(UAE)对冷冻或风干的桃汁废料进行增值的可能性。使用22因子设计优化了MAE功率,UAE幅度和时间。对于冷冻废物,最佳的MAE(540 W,50 s)和UAE(23%,120 s)工艺得到的提取物具有类似含量的多酚(309-317 mg GAE),类黄酮(94-120)(按100 g干物质计)毫克QE),花青素(8-9毫克CGE)和类似的抗氧化活性(2.1-2.2毫克TE)。从干燥废料中提取的多酚含量较高(630-670 mg GAE),而黄酮含量较低(75-90 mg QE),花色苷和维生素C(未检测到)。尽管MAE的能量密度比阿联酋高2倍,但MAE更有效地提取了维生素C(108 mg / 100 g dm),需要一半的提取时间(50 s)。就工业规模的温室气体排放和能源需求而言,MAE的影响力也将不及阿联酋。通过微波或超声辅助提取对桃子废料进行工业价值评估需要定量数据,这能够激发公司的兴趣和投资。这项研究不仅确定了最佳的MAE和UAE参数,以帮助提取桃子废料中的生物活性化合物,而且还初步估计了这些技术对工业规模的潜在经济和环境影响。能够鼓励公司的利益和投资。这项研究不仅确定了最佳的MAE和UAE参数,以帮助提取桃子废料中的生物活性化合物,而且还初步估计了这些技术对工业规模的潜在经济和环境影响。能够鼓励公司的利益和投资。这项研究不仅确定了最佳的MAE和UAE参数,以帮助提取桃子废料中的生物活性化合物,而且还初步估计了这些技术对工业规模的潜在经济和环境影响。
更新日期:2019-12-31
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