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DEVELOPMENT OF AUTOMATED SOLAR DRYER FOR VEGETABLE SEEDS

KrishiKosh

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Title DEVELOPMENT OF AUTOMATED SOLAR DRYER FOR VEGETABLE SEEDS
 
Creator THINGUJAM BIDYALAKSHMI DEVI
 
Contributor Indra Mani
 
Subject null
 
Description t-9790
Seed are usually harvested at physiological maturity having moisture content of about
16-18% wet basis. Therefore, it is necessary to reduce the moisture content of seeds to
a safe level for storage. Drying is one of the most important and sensitive unit
operations in seed processing to reduce the moisture content. Hence, it is important to
design efficient dryer to dry the seeds without losing its quality. Three vegetable seed
(onion, carrot, and tomato) were selected to design a suitable solar dryer according to
the properties of seeds, and its drying kinetics. The properties of seed studied included
engineering properties and seed quality parameters. The effect of moisture content on
engineering properties was studied taking the moisture range from harvesting
moisture level (20±1 % w.b.) till the safe storage level (8±1 % w.b.). The relationship
between moisture content and all the engineering properties studied were analyzed
with linear regression and fitted well for all the selected vegetable seeds (R2
>0.90).
The drying kinetics of all the three vegetable seeds was analyzed and data were fitted
to several drying models to know the drying behavior of seeds. Two term exponential
model was found suitable for most of the three seeds based on R2
(0.995-0.998)
values of models and their associated SEE (0.012-0.024) and Chi square (0.0001-
0.0026). Also, the effect of temperature and moisture content on seed quality
parameters that included germination percentage (GP), electrical conductivity (EC),
number of infected seeds (IS), vigor index-I (VI-I) and vigor index-II (VI-II) were
studied. Response surface methodology was employed to optimize the moisture
content (12%, 14%, 16%) and air temperature (300
C, 350
C, 400
C) for different
vegetable seed. The effect of these variables on GP, EC, IS, VI-I and VI-II were
determined and analyzed. Moisture content and air temperature had significant
(P
 
Date 2018-10-09T10:06:06Z
2018-10-09T10:06:06Z
2017
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/5810078136
 
Language en_US
 
Format application/pdf
 
Publisher Division of Agricultural Engineering, Indian Agricultural Research Institute, New Delhi –