Drying of ‘yacon’ pretreated by pulsed vacuum osmotic dehydration

IF 1.4 4区农林科学 Q3 AGRICULTURAL ENGINEERING

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-08-01 DOI:10.1590/1807-1929/AGRIAMBI.V25N8P560-565

Letícia F. Oliveira, J. Corrêa, P. G. Silveira, Marina Barbosa Vilela, J. Junqueira

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引用次数: 6

Abstract

ABSTRACT In this study, the ‘yacon’ was dried using pulsed vacuum osmotic dehydration as pretreatment followed by vacuum drying (at different temperatures) or convective drying. The use of osmotic dehydration and vacuum drying had their influence evaluated concerning drying kinetics and quality of the final product, considering fructan retention, color, and water activity. Fick’s second law and Page’s equation were suitable for the fitting of drying evolution. It was observed that higher temperatures (60 °C) resulted in shorter drying time, higher diffusivity, and higher fructan retention when compared to 40 and 50 °C. The osmotic pretreatment and the vacuum drying differed in fructan retention (p ≤ 0.05). Moreover, the dried product, osmotically pretreated, presented a shorter drying time. The best condition was vacuum drying at 60 ºC, preceded by pulsed vacuum osmotic dehydration that resulted in fructan retention of approximately 38% in a quicker, higher diffusivity and lighter color product concerning the other tested conditions.

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脉冲真空渗透脱水预处理雪莲果的干燥

摘要:本研究采用脉冲真空渗透脱水法对雪莲果进行干燥预处理，然后进行真空干燥(不同温度下)或对流干燥。利用渗透脱水和真空干燥对干燥动力学和最终产品质量的影响进行了评估，考虑了果聚糖保留率、颜色和水活性。菲克第二定律和佩奇方程适用于干燥演化过程的拟合。结果表明，与40°C和50°C相比，较高的温度(60°C)可以缩短干燥时间，提高扩散率和果聚糖保留率。渗透预处理与真空干燥在果聚糖保留率上存在差异(p≤0.05)。此外，经渗透预处理的干燥产品干燥时间较短。最佳条件是在60℃下真空干燥，然后进行脉冲真空渗透脱水，在其他测试条件下，果聚糖的保留率约为38%，产品的扩散率更高，颜色更浅。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Brasileira de Engenharia Agricola e Ambiental Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

2.70

自引率

16.70%

发文量

114

审稿时长

3-8 weeks

期刊介绍： A Revista Brasileira de Engenharia Agrícola e Ambiental (Agriambi), periódico oficial da Asociación Latinoamericana y del Caribe de Ingeniería Agrícola (ALIA), é editada mensalmente, no formato eletrônico, pela Unidade Acadêmica de Engenharia Agrícola (UAEA) do Centro de Tecnologia e Recursos Naturais (CTRN) da Universidade Federal de Campina Grande (UFCG), destinando-se à divulgação de artigos científicos originais e inéditos, elaborados em Português, Inglês ou Espanhol. Com o auxílio de pareceres de Consultores, os artigos são aceitos ou não pela Equipe Editorial para publicação na Revista. A Agriambi aceita, também, a submissão de contribuições na modalidade de revisão de literatura.