Taguchi 법 및 만족도 함수를 이용한 DIS 공정에 의한 알로에의 농축 최적화

권혜미¹, 차지민², 허원¹, 이신영¹^,^*

Optimization of DIS (Dewatering and Impregnation Soaking) Process for Concentration of Aloe vera Gel by Using Taguchi Approach with Desirability Function Analysis

Hye Mi Kwon¹, Ji Min Cha², Won Hur¹, Shin Young Lee¹^,^*

¹강원대학교 생물공학과

²KJM 알로에 R&D 센터

¹Department of Bioengineering and Technology, Kangwon National University

²KJM Aloe R&D Center

^*Corresponding author: Shin-Young Lee, Department of Bioengineering and Technology, Kangwon National University, Chunchon 200-701, Korea. Tel: +82-33-250-6273; Fax: +82-33-243-6350, E-mail: sylee@kangwon.ac.kr

ⓒ Copyright 2013 Korean Society for Food Engineering. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Sep 28, 2012; Revised: Nov 23, 2012; Accepted: Nov 27, 2012

Published Online: Feb 28, 2013

Abatract

The optimization of dewatering and impregnation soaking (DIS) process for a concentrated Aloe vera product was investigated using Taguchi method in combination with desirability function analysis. Polyethylene glycol (PEG) as osmotic agent was adopted, and soaking temperature (T), immersion time (t), PEG concentration (C), PEG molecular weight (MW), and thickness of Aloe vera leaf slice (x) were selected as affecting variables. L₁₆ (4⁵) orthogonal array was designed by Taguchi method with four parameters such as water loss, solid gain, glucomannan, and anthraquinone contents as objective functions. An overall quality index was transformed from individual objective functions, and was optimized finally. The optimal setting for maximum overall desirability was obtained at 55°C (T), 2 hr (t), 40% w/v (C), 0.5 cm (x), and 4,000 Da. (MW). The obtained overall desirability was 0.7842. The order of affecting factors was T>C>x>MW≈x>t and the experimental results under optimum condition were similar to the prediction of an overall desirability of 0.8384. Also, it was found that the optimized DIS condition could be reproduced for a minimally processed Aloe vera product with high quality.

Keywords: Aloe vera; DIS concentration; optimization; Taguchi; desirability function