Deacidification of clarified tropical fruit juices by electrodialysis. Part I. Influence of operating conditions on the process performances
Deacidification of clarified tropical fruit juices by electrodialysis. Part I. Influence of operating conditions on the process performances
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DOI：
10.1016/j.jfoodeng.2006.01.014
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发表时间：
2007-02-01
影响因子：
5.5
通讯作者：
Ruales, Jenny
中科院分区：
文献类型：
--
作者：
Vera, Edwin;Sandeaux, Jacqueline;Ruales, Jenny
采用电渗析（艾德）工艺对西番莲、卡斯蒂利亚桑葚、纳詹里拉和阿拉扎四种热带果汁的酸度进行了降低研究。在实验室和工业前规模下测试了使用单极膜和三个隔室（ED3C）以及双极膜和两个隔室（EDBM 2C）的两种堆叠配置。根据电流密度、流速、温度和脱酸最终pH等操作条件的函数来评估艾德性能。西番莲果汁、桑葚果汁和纳兰吉拉果汁的酸度主要是由于柠檬酸，也有类似的行为。在一定的操作条件下，膜会发生污染。这是特别显着的桑葚汁可能是因为其高含量的酚类化合物。较低的艾德性能获得的araza汁，其酸性主要是由于苹果酸。进行脱酸直到pH 4、4.5或7.9，在所有情况下都具有令人满意的结果。比较两种艾德结构，ED 3C的性能优于EDBM 2C。然而，后者的配置允许生产柠檬酸或苹果酸，并避免了由ED 3C引起的NaOH消耗。使用具有比实验室电池大10倍的膜面积和比实验室电池低13倍的厚度隔室的工业前试验导致ED3C和EDBM 2C的能耗显著降低70%和60%。分别(c)2006爱思唯尔有限公司保留所有权利。
The reduction of acidity of four tropical fruit juices, passion fruit, castilla mulberry, najanrilla and araza, was investigated by using the electrodialysis (ED) process. Two stack configurations using homopolar membranes and three compartments (ED3C), and bipolar membranes and two compartments (EDBM2C), were tested at the laboratory and pre-industrial scale. The ED performances were evaluated as a function of operating conditions such as current density, flow rate, temperature and final pH of the deacidification. The passion fruit, mulberry and naranjilla juices whose acidity is mainly due to the citric acid, had a similar behaviour. A fouling membrane took place in some operating conditions. It is particularly significant with the mulberry juice probably because of its high content in phenolic compounds. Lower ED performances were obtained with the araza juice whose acidity is mainly due to the malic acid. The deacidification was carried out until pH 4, 4.5 or 7.9 with satisfactory results in all cases. Comparing the two ED configurations, ED3C gave better performances than EDBM2C. Nevertheless, the latter configuration allowed the production of the citric or malic acid, and avoided the NaOH consumption induced by ED3C. The use of a pre-industrial pilot with a membrane area 10 times greater and a thickness compartment 13 times lower than the laboratory cell induced a significant decrease in the energy consumption, by 70% and 60%, for ED3C and EDBM2C. respectively. (c) 2006 Elsevier Ltd. All rights reserved.