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ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
Open Access

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Research Article

Osmotic Dehydration of Pumpkin Using Response Surface Methodology -Influences of Operating Conditions on Water Loss and Solute Gain

Atiqur Rahman SM1, Enamul Hoque M2*, Rahman S3and Hasanuzzaman M4
1Sustainable and Renewable Energy Engineering, University of Sharjah, University City, 27272 Sharjah, United Arab Emirates
2Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Malaysia Campus, 43500 Selangor Darul Ehsan, Malaysia
3Centre of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Kingdom of Saudi Arabia
4Higher Institution Centre of Excellence, University of Malaya, 50603 Kuala Lumpur, Malaysia
Corresponding Author : Enamul Hoque M
Department of Mechanical
Materials and Manufacturing Engineering
University of Nottingham Malaysia Campus
43500 Selangor Darul Ehsan, Malaysia
Tel: 601-626- 906-21
E-mail: [email protected]
Received February 17, 2015; Accepted May 15, 2015; Published May 20, 2015
Citation: Atiqur Rahman SM, Enamul Hoque M, Rahman S, Hasanuzzaman M (2015) Osmotic Dehydration of Pumpkin Using Response Surface Methodology - Influences of Operating Conditions on Water Loss and Solute Gain. J Bioprocess Biotech 5: 226. doi: 10.4172/2155-9821.1000226
Copyright: ©2015 Atiqur Rahman SM et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Response surface methodology (RSM) is a powerful tool in the area of process and product improvements. It is a collection of experimental designs and optimization techniques that enables the investigator to determine the relationship between independent variables and the obtained responses. This study focuses on the osmotic dehydration of pumpkin slices using response surface methodology investigating the influences of operating conditions on water loss and solute gain The operating conditions were varied by changing the independent process variables in a range e.g. salt concentrations from 5% to 25% (w/v), salt solution temperatures from 30°C to 70°C and processing time from 30 to 150 minutes. Results showed that all the process variables had significant influences on both water loss and solute gain. However, the solution concentration was observed to be the most influential parameter followed by processing time and solution temperature. The optimum operating conditions that caused maximum water loss and minimum solute gain were found to be at solution temperature of 65.8°C, salt concentration of 25% and processing time of 63 minutes. In conclusion, this study provides a strong guideline for efficient drying of seasonal crop (e.g. pumpkin) in industrial application without compromising quality.

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