Tabib Malak, Ginies Christian, Rakotomanomana Njara, Remmal Adnane
Department of Biology, Faculty of Science Dhar El-Mahraz, University Sidi Mohammed Ben Abdellah, P.O. Box 1796, Fez 30050, Morocco.
INRAE, Avignon University, UMR A 408, Green Extraction Team, F-84000 Avignon, France.
Int J Food Sci. 2022 Jun 3;2022:7847276. doi: 10.1155/2022/7847276. eCollection 2022.
The almond processing industry generates large volumes of effluent after the blanching process. Blanching water is one of the main by-products with a potential source of polyphenols. However, before being used or discharged, this by-product requires pretreatment. This work was aimed at paving the way toward using adsorption on XAD-7 HP macroporous resin for wastewater treatment. This promising technique could be easily scaled up and integrated into existing production lines. Adsorption was carried out with a fixed bed in counterflow, while desorption was performed by acetone in downflow. With this approach, it was possible to concentrate up to five times the phenolic content of the initial blanching water. The resulting extract was analyzed by ultraperformance liquid chromatography-mass spectrometry (UPLC-MS), identifying more than 89% procyanidins, in addition to catechin, epicatechin, and isorhamnetin-3-O-rutinoside. Applications such as spray-drying and prilling techniques were suggested to improve the efficiency of polyphenols by preserving their stability, bioactivity, and bioavailability.
杏仁加工业在烫漂过程后会产生大量废水。烫漂水是主要副产品之一，是多酚的潜在来源。然而，在使用或排放之前，这种副产品需要进行预处理。这项工作旨在为采用XAD - 7 HP大孔树脂吸附法处理废水铺平道路。这种有前景的技术可以很容易地扩大规模并整合到现有的生产线中。吸附在逆流固定床中进行，而解吸则通过丙酮顺流进行。通过这种方法，初始烫漂水中的酚类含量可以浓缩至五倍。所得提取物通过超高效液相色谱 - 质谱联用仪（UPLC - MS）进行分析，除儿茶素、表儿茶素和异鼠李素 - 3 - O - 芸香糖苷外，还鉴定出超过89%的原花青素。建议采用喷雾干燥和造粒技术等应用，通过保持多酚的稳定性、生物活性和生物利用度来提高其效率。
