Singh et al
Greener Journal of Agricultural Sciences Vol. 4 (6), pp. 281-287, July 2014.
ISSN: 2276-7770 © 2011 Greener Journals
Manuscript Number: 040314174
The Drying Characteristics of Amaranth Leaves under Greenhouse Type Solar Dryer and Open Sun
Papu Singh*1, Sweta Singh1, B.R. Singh2, Jaivir Singh3 and S.K. Singh4
1Ph. D. Scholar, Department of Agricultural Engineering and Food Technology, College of Agriculture, S.V.P. University of Agriculture & Technology, Meerut-250110 (U.P.) India.
2Professor & Ex-HOD, Department of Agricultural Engineering and Food Technology, College of Agriculture, S.V.P. University of Agriculture & Technology, Meerut-250110 (U.P.) India.
3Assistant Professor, Department of Agricultural Engineering and Food Technology, College of Agriculture, S.V.P. University of Agriculture & Technology, Meerut-250110 (U.P.) India.
4Division of Farm Machinery and Post Harvest Technology, Indian Grassland and Fodder Research Institute, Jhansi (U.P.).
*Corresponding Author’s Email: papusinghujjwal @gmail .com / psingh84svp @gmail .com,
Phone: 01234 273028, Mobile: 09759678365
The dehydrated leafy vegetables have the potential to become an important product because of relatively inexpensive, easily and quickly cookable and rich in several nutrients which are essential for human health. The proper drying techniques are the most important aspect of leafy vegetable preservation. The use of solar dryer helps to reduce the losses and improves the quality of product. A Greenhouse type solar dryer was used and the experiments were conducted to develop dehydrated amaranth leaves so as to enhance the availability of amaranth leaves during off season. In the present study, fresh amaranth leaves were pretreated in two ways viz; (i) dipping in a solution (leaves to water 1:5 (w/w)) containing 0.1% Mgcl2 + 0.1% NaHCO3 + 2% KMS in distilled water for 15 minute and (ii) blanching in boiling water containing 3% sodium bisulphate for 2 min. The leaves were dried at 1.5, 2.0 and 2.5 kg/m2 loading density, under greenhouse type solar dryer and in open sun. Untreated amaranth leaves were also dried as control samples. It is also grown as leaf vegetable through South-East Asia and Latin America. Leafy vegetable have gained commercial importance and form an essential part of diet, providing vitamins and micro-nutrients.
Keywords: Amaranth leaves, drying, treatments, GSD, OSD and chemicals.
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