Vol. 7 (1) : January-February 2016 issue
Green Farming Vol. 7 (1) : 247-250 ; January-February, 2016
Study of the osmo-convective dehydration of Aloe vera (Aloe barbadensis Miller) gel cubes
SHALINI1*, JAIVIR SINGH2, SURESH CHANDRA3, VIVAK KUMAR4 and NEELESH CHAUHAN5
Department of Agricultural Engineering and Food Technology, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut - 250110 (Uttar Pradesh)
Designation : 1Ph.d. Scholar, 2,3,4,5Asstt. Prof. *(shalini.pundhir12@gmail.com)
Subject : Agriculture Engineering, Farm Machinery, Energy & Power and Process Engineering
Paper No. : P-3620
Total Pages : 4
Received : 20 April 2015
Revised accepted : 21 January 2016
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Citation :
SHALINI, JAIVIR SINGH, SURESH CHANDRA, VIVAK KUMAR and NEELESH CHAUHAN. 2016. Study of the osmo-convective dehydration of Aloe vera (Aloe barbadensis Miller) gel cubes. Green Farming Vol. 7 (1) : 247-250 ; January-February, 2016
ABSTRACT
Aloe vera (Aloe barbadensis Miller) leaves were washed and cut into 25 x 25 x 25 mm cubes and were osmotically dehydrated in different concentration (43.2, 50, 60, 70, 76.8 OBrix) and process temperature (43.2, 50, 60, 70, 76.8 OC) with syrup to fruit ratio (4.3:1, 5:1, 6:1, 7:1, 7.7:1) for 4 hr duration of osmosis. The osmosed and untreated Aloe Vera gel cubes were dried in tray dryer at 50OC, 60OC, 70OC and hot air dryer at 60OC, 70OC, 80OC. It was found that osmosis as a pretreatment prior to convective air drying was able to decrease drying time. It was observed that drying rate increased with increase in drying temperature from 50OC (Tray drying) to 80OC (Hot air dryer) and constant rate drying period was absent throughout the drying process of Aloe Vera cubes dried under all drying air temperatures. Osmosis as a pre treatment prior to convective air drying was able to decrease drying time.
Key words :
Aloe vera, Drying, Moisture content, Osmosis, Osmotic dehydration, Sensory evaluation.
