Paddy Drying in Mixed Adsorption Dryer With Zeolite: Drying Rate and Time Estimation

Abstract

Recently, the main problem of the rice stock and distribution in Indonesia is the quality degradation as indicated in unpleasant odor (smelly), stained, yellowness, and high percentage of broken rice. This is due to the low of paddy quality dried by from either direct

Energy Efficient Dryer with Rice Husk Fuel for Agriculture Drying

“…The rice husk was selected because its combustion value to 15 MJ/kg. With latent heat of water evaporation about 2.5 MJ/kg, one kilogram of rice husk can evaporate 6 kg of free moisture (Djaeni and Asiah, 2014) In the pilot scale, the heat efficiency was estimated with the following equations (Djaeni et al, 2013b;Djaeni et al, 2009).…”

“…The process was repeated for air temperature 50 o C. As comparison, the drying without zeolite was also performed. All data was used to predict drying time for various relative humidity as previously formulated (Djaeni et al, 2013b). (Djaeni et al, 2013b) …”

“…Amount of 0.5 kg of paddy was placed in fluidized bed dryer with presence of zeolite (20%). The energy efficiency was estimated based on total input and output air temperature (Djaeni et al, 2013b). The capacity was increased at various capacity up to 2.5 kg.…”

“…The air temperature and humidity were measured by KW0600561, Krisbow®, Indonesia (noted as T-RH). The air velocity was measured with an anemometer KW0600562, Krisbow ®, Indonesia (Djaeni et al, 2013b). The ambient air was heated up to 50oC by electric heater.…”

“…The moisture content versus time was observed as input to find effective drying time. The effective drying time can be estimated based on the previous research (Djaeni et al, 2013b). The process was repeated for different air temperature.…”