Study on Dehydration Conditions and Quality of Dried Paddy by Small Inflatable Solar Dryer
Abstract
This research aims to study a dehydration of paddy in a small inflatable dryer by using solar energy as a heat source. The dryer made from 2 types of plastics were LLDPE and PVC which can collapse. The dimension of the dryer was 1 m of width, 2 m of length, which used with 80 W solar cells. The average inside air temperature of the dryer was 41.8±2.3°C at the solar radiation of 488–959 W/m2 in non-product condition. From the study found that, increasing capacity of paddy in inflatable solar dryer, moisture ratio was more decrease than sundry method in the same condition test. For the 7 hr of the drying time, the moisture content of paddy (wet basis) in all conditions test were lower than 14 and the water activity were lower than 0.65 which depended on standard of paddy. From the study of physical properties found that, the dehydration process effected to paddy width and raw rice width which the width was decrease from fresh paddy and fresh raw rice. And color value of dehydrated product in both methods found that, the b-value of dried raw rice increase significantly and difference with fresh raw rice (p£0.05). The thermal efficiency of the inflatable solar dryer at the test time of 5 hr and initial sample of 10 kg, was 23.02±0.12%. The result found that, the inflatable solar dryer can be applied for dehumidification of paddy to obtain quality products. Keywords : Paddy/ Inflatable dryer/ Solar energyReferences
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Romuli, S., Schock, S., Somda, M.K. & Muller, J. (2020). Drying Performance and Aflatoxin Content of Paddy Rice Applying and Inflatable Solar Dryer in Burkina Faso. Applied Science, 10, 1-13.
Shahi, N.C., Khan, J.N., Lohani, U.C., Singh, A. & Kumar, A. (2011). Development of polyhouse type solar dryer for Kashmir valley. Journal of Food Science and Technology, 48(3), 290-295.
Sookramoon, K. & Khamwachirapithak, M. (2016). Rice Grain Physical and Chemical analysis from Paddy Drying by Using a Solar Tunnel Dryer at Prathum Tani, Thailand. In Proceeding of The 3rd International Conference on Industrial Engineering and Applications. (pp. 1-4). Ukraine: Glib Vatulia.
Thanasookprasert, S., Swasdiisevi, T., Devahastin, S. & Soponronnarit, S. (2012). Dehydration of Unhusked Rice by Using Impinging Stream Dryer. Journal of Science and Technology, 1(2), 1-10. (in Thai)
Thauynak, P., Chuchonaak, M., Yapha, M. & Bunyawanichakul, P. (2014). Review of Development of Paddy Dried in Industry. Srinakharinwirot Engineering Journal, 9(1), 68-74. (in Thai)
Trongjit, K., Juthajan, W. & Laowlard, L. (2018). Simple Reassemble Paddy Solar Dryer. Koch Cha Sarn Journal of Science, 40(2), 76-90. (in Thai)
Bason, M. L., Gras, P. W., Banks, H. J., & Esteves, L. A. (1990). A Quantitative Study of the Influence of Temperature, Water Activity and Storage Atmosphere on the Yellowing of Paddy Endosperm. Journal of Cereal Science, 12(2), 193–201.
Inprasit, C. & Noomhorm, A. (2001). Effect of Drying air temperature and Grain temperature of Different types of Dryer and Operation on Rice Quality. Drying Technology, 19(2), 389-404.
Maneerath, C., Chomchuen, K., Boocha, W. & Wisitsirikun, S. (2015). The Study of Suitable Humidity in Paddy for Rice Process. In Proceeding of The 2nd Kamphaeng phet Rajabhat University National Conference. (pp. 213 - 219). Thailand: Kamphaeng phet. (in Thai)
Narmilan, A., Niroash, G., Mowjood, M.I.M. & Akram, A.T.A. (2021). Effect of Pads and Thickness of Paddy on Moisture Removal under Sun Drying. Agricultural Science Digest, 41, 572-577
Nassiri, M. & Etesami, M. (2011). The Best Method for Rough Rice Drying Based on Operational Energy and Head Rice Yield Quality. Journal of Agricultural Machinery Science, 7(4), 339-345.
National Bureau of Agricultural Commodity and Food Standards. (2017). Community Product Standard: Dried herb. Retrieved February 28, 2022, from http://www.acfs.go.th/standard/ download/Thai- Rice_60.pdf. (in Thai)
Prakash, B., & Pan, Z. (2012). Effect of Geometry of Rice Kernels on Drying Modeling Results. Drying Technology, 30(8), 801–807.
Rojas, S.A., Nagle, M., Gummert, M., Bruin, T. & Muller, J. (2017). Development of an Inflatable Solar Dryer for Improved Postharvest Handling of Paddy Rice in Humid Climates. Institute of Engineering, 10(3), 270-280.
Romuli, S., Schock, S., Somda, M.K. & Muller, J. (2020). Drying Performance and Aflatoxin Content of Paddy Rice Applying and Inflatable Solar Dryer in Burkina Faso. Applied Science, 10, 1-13.
Shahi, N.C., Khan, J.N., Lohani, U.C., Singh, A. & Kumar, A. (2011). Development of polyhouse type solar dryer for Kashmir valley. Journal of Food Science and Technology, 48(3), 290-295.
Sookramoon, K. & Khamwachirapithak, M. (2016). Rice Grain Physical and Chemical analysis from Paddy Drying by Using a Solar Tunnel Dryer at Prathum Tani, Thailand. In Proceeding of The 3rd International Conference on Industrial Engineering and Applications. (pp. 1-4). Ukraine: Glib Vatulia.
Thanasookprasert, S., Swasdiisevi, T., Devahastin, S. & Soponronnarit, S. (2012). Dehydration of Unhusked Rice by Using Impinging Stream Dryer. Journal of Science and Technology, 1(2), 1-10. (in Thai)
Thauynak, P., Chuchonaak, M., Yapha, M. & Bunyawanichakul, P. (2014). Review of Development of Paddy Dried in Industry. Srinakharinwirot Engineering Journal, 9(1), 68-74. (in Thai)
Trongjit, K., Juthajan, W. & Laowlard, L. (2018). Simple Reassemble Paddy Solar Dryer. Koch Cha Sarn Journal of Science, 40(2), 76-90. (in Thai)
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Published
2023-01-04
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