In this study, high hydrostatic pressure extraction (HHPE) and ultrasound-assisted extraction (UAE) were used for the improvement of pectin and polyphenol recovery from tomato peel waste.

HHPE enhanced pectin recovery by 15% after 45 min of recycling, in comparison with the conventional extraction (CE) for 180 min. Similar mass fractions of anhydrouronic acid, total sugars and total phenols were obtained by using both methods. FTIR and ¹H NMR data confirmed that chemical composition of pectin obtained by HHPE and CE is identical, therefore it was concluded that the faster HHPE method can be used for its further isolation.

Although depectinized residues subjected to UAE in 70% ethanol for 15 min contained two times lower values of total phenols (1625.7 mg/100 g) than pectinized samples (3643.9 mg/100 g), their quantities are not negligible, considering the fact that they are generated after HHPE. At the end of UAE, the residues were exploited as a source of fatty acids, among which lauric, palmitic and stearic acids are dominant.

In conclusion, by shortening the extraction time using HHPE and UAE, it is possible to efficiently produce two valuable functional ingredients, pectin and polyphenols, and at the same time to reduce peel waste from tomato canning industry, which presents an environmental problem.

Industrial relevance

Utilizing HHPE and UAE as novel and emerging technologies, and combining them with traditional ones (Soxhlet) is given the solution for sequential isolation of pectin, polyphenols and fatty acids from tomato peel waste, generated by canning factory.

Shortening of extraction time using HHPE and UAE, it is possible to replace the conventional techniques, and achieve efficient production of pectin and polyphenols.

Overall, the extraction methodology proposed in this work could provide two valuable benefits, i.e. the producers could find mode for decreasing of disposal costs of waste and consumer would take opportunity that isolated compounds could be reintroduced into food.

中文翻译：

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高静水压和超声辅助提取作为从番茄皮废料中回收果胶和多酚的新方法

在这项研究中，高静水压提取（HHPE）和超声辅助提取（UAE）用于改善番茄皮废料中的果胶和多酚回收率。

与传统的提取（CE）相比，HHPE在回收45分钟后可将果胶的回收率提高15％，达到180分钟。使用这两种方法均可得到相似质量分数的无糖醛酸，总糖和总酚。FTIR和¹ H NMR数据证实由HHPE和CE获得的果胶的化学组成相同，因此得出结论，可以使用更快的HHPE方法进一步分离。

尽管在70％的乙醇中经过阿联酋测试的去胶残留物的总酚含量（1625.7 mg / 100 g）比被去胶样品（3643.9 mg / 100 g）低两倍，但考虑到它们的含量不可忽略不计是在HHPE之后生成的。在阿联酋结束时，残渣被用作脂肪酸的来源，其中月桂酸，棕榈酸和硬脂酸占主导。

总之，通过缩短使用HHPE和阿联酋的提取时间，可以有效地生产两种有价值的功能成分果胶和多酚，同时减少番茄罐头行业的果皮浪费，这带来了环境问题。

行业相关性

利用HHPE和UAE作为新兴技术，并将其与传统技术（Soxhlet）相结合，提供了从罐头厂产生的番茄果皮废料中依次分离果胶，多酚和脂肪酸的解决方案。

使用HHPE和UAE缩短提取时间，可以替代传统技术，并实现果胶和多酚的高效生产。

总体而言，这项工作中提出的提取方法可以提供两个有价值的好处，即生产者可以找到降低废物处置成本的方式，而消费者将可以将分离出的化合物重新引入食品中。