EVALUATION OF DIFFERENT DRYING METHODS FOR DE-SKINNED FIELD BEANS
Loading...
Files
Date
2018-08-23
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences, Bengaluru
Abstract
The study has been conducted in the Department of Agricultural Engineering,
University of Agricultural Sciences, Bangalore during the year 2017-2018. Dolichos
lablab is an ancient legume crop which is commonly called as Field bean. It is
traditionally grown as a pulse crop or vegetables for human consumption or animal feed
in South East Asia and African countries. Both whole bean and de-skinned bean can be
used as a vegetable. In South India the de-skinned bean is having more demand in
kitchens and to available in off season, the de-skinned field beans were dried, stored and
used. Different drying methods like sun, solar cabinet, hot air tray and vacuum tray
drying were used to study. Solar drying methods took lesser time than sun drying method
which was about 7.5 hours and 8.5 hours respectively. Hot air tray drying at 50 and 55˚C
took only 3 hours and at 45˚C took 3.5 hours. Vacuum drying was done at the
temperature of 35, 40 and 45˚C took 6, 4.5 and 4 hours respectively. The physical
properties and nutritional composition of whole beans, de-skinned and dried de-skinned
field beans were analyzed and proved that there were no significant differences were
found in case of nutritional compositions except crude protein. The storage study was
conducted in an ambient room temperature for 2 months in LDPE and PP packages and
there were no significant differences were found in case of nutritional compositions, but
moisture content was slightly increased in case of PP packages. Finally, it was found that
solar drying method was inexpensive and the quality was better than sun and hot air
drying methods.
Description
Keywords
null