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PEMBUATAN FLUIDIZED BED DRYER UNTUK PENGERINGAN BENIH PERTANIAN SECARA SEMI BATCH
Melon seed is one of agriculture seed product, it is have the high economic
cost. Now, the phenomenon in the villager community is they was drainage the
agriculture seed by sunrise energy by spread it in yard or in the rack for drying.
This method have any weakness, beside depend for the weather it can made the
seed be easy to contaminated, have a difficult control, need a large place and this
method also need along time to do. Drainage is the method to out or disappear a
part of water from the materials with dryer media, till the Equilibrium Moisture
Content (EMC) with normal atmosphere condition or the equilibrium moisture
which equal with water activity can be safe from the microbiology, enzyme, and
chemical damage. The purpose of Fluidized Bed Dryer (FBD) drainage is for dry
the agriculture seed to get the equal equilibrium moisture with a short time
drainage process.
Fluidized Bed Dryer (FBD) is a dryer with fluidization principle. The
principle of this drainage machine is blow up the warm air by the blower pass
trough the tract above of dryer vessel who pierce material spread out area in order
that this materials can be move and have a fluid characteristic.
A wet melon seed with 46,21 % of equilibrium moisture and 75 ºC of
temperature can get 3,80 % of equilibrium moisture, by Fluidized Bed Dryer
(FBD) drainage in 75 minutes of optimum time. At the time in 65ºC of
temperature and 90 minutes of optimum time can get 5,18 % of equilibrium
moisture. And for 55 ºC of temperature and 120 minutes of optimum time we can
get 3,65 % of equilibrium moisture.
From the experiment, for 80 gram seed with 43,05 % of equilibrium
moisture, 75 minutes of optimum drainage time, in 75 ºC of temperature we can
get 3,80 % of equilibrium moisture. And to get a good seed for growth its need at
about 11-14 %