Research Article | OPEN ACCESS
Enhancing The Food Product Drying with Air Dehumidified by Zeolite
1M. Djaeni, 1D. Anggoro, 2G.W. Santoso, 1D. Agustina, 1N. Asiah and 3C.L. Hii
1Department of Chemical Engineering, Faculty of Engineering
2Marine Science, Faculty of Marine and Fishery, Diponegoro University, Jl Prof H. Soedharto, SH Tembalang, Semarang, Indonesia
3Department of Chemical and Environment Engineering, University of Nottingham, Malaysia Campus Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
Advance Journal of Food Science and Technology 2014 7:833-838
Received: October 31, 2013 | Accepted: November 12, 2013 | Published: July 10, 2014
Abstract
The demand of powdered food products such as soups, sauces, dried yeasts and herbal medicine is increasing for consumer convenience. Mostly, these products have been produced with drying process either, direct sunlight, conventional, or modern dryer. The direct sunlight dryer depends on the daily weather both in the product quality and process continuity. Meanwhile, conventional dryer results high energy consumption as well as low product quality due to the introduction of hot air. In addition, modern dryer process can improve the product quality, but the energy efficiency was fair. This study discusses the design and application of adsorption dryer with zeolite for food product. As samples, the carrageenan isolated from seawed and roselle extract were dried. Here, the air as drying medium was dehumidified by zeolite to enhance the driving force at lower temperature. The study was conducted in various air velocity, temperature and relative humidity. Results showed that the air temperature had the most superior effect both on product quality and drying rate. The higher temperature, the higher drying rate but the lower product quality. Air dehumidification had a positive effect on product quality and drying for low operational temperature. For all cases, it was recommended that the drying around70°C or below was favorable for reasonable quality and drying rate.
Keywords:
Carrageenan, dehumidification, roselle, sensitive, zeolite,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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