Effect of intermittent microwave vacuum concentration on quality parameters of apple juice and sour cherry nectar and mathematical modeling of concentration

IF 0.9 4区 工程技术 Q4 ENGINEERING, CHEMICAL Journal of Microwave Power and Electromagnetic Energy Pub Date : 2021-08-31 DOI:10.1080/08327823.2021.1952837
Cuneyt Dincer
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引用次数: 3

Abstract

Abstract In this study, sour cherry nectar and apple juice were concentrated using thermal concentration (75, 80, and 85 °C), and intermittent microwave concentration (180, 300, and 450 W) under vacuum condition (at 250 mbar). Thirteen different mathematical models were used to describe the concentration kinetics of the samples. The Midilli model exhibited the best fit to all experimental data (R2 ≥ 0.9972; χ2 ≤ 1.6724; RMSE ≤ 1.2932). The concentration time was reduced with increasing microwave power (from 180 W to 450 W) and thermal vacuum concentration temperature (from 75 °C to 85 °C). In addition, the main quality parameters of the concentrates were comparatively investigated after reconstitution. Generally, major differences were not observed in the physicochemical properties of samples concentrated by thermal and microwave methods. Total phenolic content of the apple juice and sour cherry nectar samples were ranged between 209.87-216.67 mg/L and 571.00-588.57 mg/L, respectively. Fructose was the main sugar in both juices, followed by glucose and sucrose. The particle size of the juice samples increased with concentration processing.
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间歇微波真空浓缩对苹果汁和酸樱桃蜜品质参数的影响及浓缩数学建模
摘要本研究采用热浓缩(75、80和85℃)和间歇微波浓缩(180、300和450 W),在真空条件下(250 mbar)对酸樱桃花蜜和苹果汁进行浓缩。采用了13种不同的数学模型来描述样品的浓度动力学。Midilli模型对所有实验数据拟合最佳(R2≥0.9972;χ2≤1.6724;Rmse≤1.2932)。随着微波功率(从180 W增加到450 W)和热真空浓缩温度(从75℃增加到85℃)的增加,浓缩时间缩短。并对重构后精矿的主要质量参数进行了比较研究。通常,通过热和微波方法浓缩的样品在物理化学性质上没有观察到重大差异。苹果汁和酸樱桃花蜜样品的总酚含量分别为209.87 ~ 216.67 mg/L和571.00 ~ 588.57 mg/L。果糖是两种果汁中的主要糖,其次是葡萄糖和蔗糖。随着浓缩处理,果汁样品的粒径增大。
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来源期刊
Journal of Microwave Power and Electromagnetic Energy
Journal of Microwave Power and Electromagnetic Energy ENGINEERING, CHEMICAL-ENGINEERING, ELECTRICAL & ELECTRONIC
CiteScore
2.50
自引率
6.70%
发文量
21
期刊介绍: The Journal of the Microwave Power Energy (JMPEE) is a quarterly publication of the International Microwave Power Institute (IMPI), aimed to be one of the primary sources of the most reliable information in the arts and sciences of microwave and RF technology. JMPEE provides space to engineers and researchers for presenting papers about non-communication applications of microwave and RF, mostly industrial, scientific, medical and instrumentation. Topics include, but are not limited to: applications in materials science and nanotechnology, characterization of biological tissues, food industry applications, green chemistry, health and therapeutic applications, microwave chemistry, microwave processing of materials, soil remediation, and waste processing.
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