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首页> 外文期刊>Journal of industrial and engineering chemistry >Semi-continuous extraction/hydrolysis of spent coffee grounds with subcritical water
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Semi-continuous extraction/hydrolysis of spent coffee grounds with subcritical water

机译：亚临界水的半连续提取/水解废咖啡渣

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摘要

Spent coffee grounds (SCG) were treated with subcritical water (SBW) in a semi-continuous reactor at different temperatures, pressures, and water flowrates. Yields of carbohydrates and phenolics reached 33.7 g and 4 g per 100 g-dry SCG, respectively, at 200 degrees C, 70 bar and 10 mL/min. Liquors collected at the beginning of assays were richer in phenolics and poorer in carbohydrates, whose yield increased sharply when temperature reached 150 degrees C. Most carbohydrates were recovered as oligosaccharides, and practically all cellulose remained in the SCG recovered at the end of assays. Extracts exhibited DPPH antioxidant capacity and antibacterial activity against both Gram-positive and Gram-negative bacteria. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：在不同温度，压力和水流量的半连续反应器中，用亚临界水（SBW）处理咖啡渣（SCG）。 碳水化合物和酚类产量分别达到33.7g，每100g-Dry SCG达到33.7g和4克，在200℃，70巴和10mL / min。 在测定开始时收集的液体在酚类水合物中更丰富，碳水化合物中的较差，当温度达到150摄氏度时，其产率急剧增加。最多的碳水化合物被回收为低聚糖，并且实际上所有纤维素在测定结束时仍在SCG中回收。 提取物表现出DPPH抗氧化能力和针对革兰氏阳性和革兰氏阴性细菌的抗菌活性。 （c）2019年韩国工程化学学会。 elsevier b.v出版。保留所有权利。

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