Block freeze concentration assisted by centrifugation applied to blueberry and pineapple juices
Block freeze concentration assisted by centrifugation applied to blueberry and pineapple juices
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DOI：
10.1016/j.ifset.2015.03.007
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发表时间：
2015-08-01
影响因子：
6.6
通讯作者：
Orellana, Patricio
中科院分区：
文献类型：
--
作者：
Petzold, Guillermo;Moreno, Jorge;Orellana, Patricio
除杂是提高块料冷冻浓缩效率的一种辅助技术。本文报道了用离心法强化冷冻果汁（蓝莓和菠萝）浓缩液的分离，并进行了三次冷冻浓缩循环。为了强制从冷冻样品中分离溶质，我们使用在20 ℃和4600 rpm下运行10 min的离心机。该技术在第三次循环后具有良好的性能，达到约2.5倍的初始固体浓度的增加，接近0.74 kg溶质/1 kg初始溶质的值，以及约60%的浓缩物百分比。应用于果汁的离心辅助块冷冻浓缩的性能归因于冰基质作为多孔固体，浓缩溶液通过该多孔固体通过离心力改善的冰的排水通道进行蒸发。块冷冻浓缩允许在解冻冷冻溶液时生产具有高质量的食品浓缩物，所述解冻冷冻溶液由增强分离的技术辅助或不辅助效率本工作应用离心分离作为辅助技术，提高了果汁块冷冻浓缩的效率，取得了满意的效果。(C)2015爱思唯尔有限公司版权所有。
Centrifugation is an alternative assisted technique to improve the efficiency of block freeze concentration. In this study reported the centrifugation to enhance the separation of concentrated solution from frozen fruit juices (blueberry and pineapple) in three cryoconcentration cycles. To force the separation of solutes from the frozen samples we used a centrifuge operated for 10 min at 20 degrees C and 4600 rpm. This technique has good performance after the third cycle, reaching an increase of approximately 2.5 times the initial concentrations of solids, values close to 0.74 kg solute per 1 kg initial solute, and approximately 60% of the percentage of concentrate. The performance of block freeze concentration assisted by centrifugation applied to fruit juices was attributed to ice matrix acting as a porous solid through which the concentrated solution percolates through drainage channels of the ice improved by the centrifugal force.Industrial relevance: The block freeze concentration allows producing food concentrates with high quality when thawed a frozen solution assisted or not by a technique to enhance the separation efficiency. In this work has applied centrifugation as an assisted technique to improve the efficiency of block freeze concentration applied to fruit juices, obtaining promissory results. (C) 2015 Elsevier Ltd. All rights reserved.