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Effect of Pads and Thickness of Paddy on Moisture Removal under Sun Drying

DOI: 10.18805/ag.D-327    | Article Id: D-327 | Page : 572-577
Citation :- Effect of Pads and Thickness of Paddy on Moisture Removal under Sun Drying.Agricultural Science Digest.2021.(41):572-577
A. Narmilan, G. Niroash, M.I.M. Mowjood, A.T.A. Akram narmilan@seu.ac.lk
Address : Department of Biosystems Technology, Faculty of Technology, South Eastern University of Sri Lanka.
Submitted Date : 5-12-2020
Accepted Date : 19-02-2021

Abstract

Background: Sun drying is a popular post-harvest operation to maintain rice quality during the storage period. Farmers use different pads and thicknesses for sun drying of paddy in Ampara district, Sri Lanka. A study was conducted to evaluate the suitability and effectiveness of the drying pad and thickness as practiced by local paddy farmers during the sun drying process.
Methods: The grain with an initial moisture content of 28% (dry basis) was sun dried with four types of drying pads and five levels of thickness of grain. This experiment was conducted between 8.30 am and 4.30 pm at the South Eastern University of Sri Lanka in August 2020. The moisture contents of the grain were measured at regular time intervals.
Result: It was found that the duration of drying of paddy from 28% to 13% moisture content on a dry basis was 300 to 540 minutes depending upon the drying pad and thickness. The tarpaulin is reasonable at shallow thickness with less time to reach the necessary moisture level than other drying pads. Black polythene and fertilizer bag can be utilized for sun drying of paddy at 4 cm thickness with 130 minutes. It was found that with an increase in the thickness of paddy from 0.5 cm to 4 cm, the drying time increases. A statistically significant interaction was obtained between drying pads and thickness level on moisture removal of paddy. Therefore, the moisture removal rate differs with the drying pad and thickness of the paddy under open sun drying.

Keywords

Drying pad Drying time Paddy Sun drying Thickness

References

  1. ASAE Standards. (1998). Compression Test of Food Materials of Convex Shape. 44th Edition, American Society for Agricultural Engineering.
  2. Babamiri, N.S. and Asli-Ardeh, E.A. (2013). Effect of drying temperature and final grain moisture content on the hulling and head rice yield efficiency of some common rough rice varieties. International Journal of Agriculture and Crop Sciences. 6(9): 529-533.
  3. Candia, A., Oker, T.E., Muzei, J., Olupot, J., Yawe, J., Emapus, B. and Okiror, W. (2013). Effect of Paddy Drying Depth Using Open-Sun Drying on Drying Time and Mill Recovery of Kaiso Variety in Eastern Uganda. Uganda Journal of Agricultural Sciences. 14(2): 37-47.
  4. Cheenkachorn, K. (2007). Drying of Rice Paddy using a Microwave- Vacuum Dryer. Proceedings of European Congress of Chemical Engineering (ECCE-6). Copenhagen, 16-20 September 2007.
  5. FAO (2013). Postharvest food losses estimation. http://www.fao.org/fileadmin/templates/ess/documents/meetings_and _workshops/GS_SAC_2013/Improving_methods_for_ estimating_post_harvest_losses/Final_PHLs_ Estimation _6-13-13.pdf.
  6. Hellevang K. (2004). NDSU Offers Winter Grain Storage Tips. North Dakota State University. (701): 231-7243.
  7. Iguaz, A., M.B. San Martin, J.I. Mate, T. Fernandez. and P. Virseda. (2003). Modeling effective moisture diffusivity of rough rice (Lido cultivar) at low drying temperatures. Journal of Food Engineering. 59(2): 253-258.
  8. Imoudu, P.B. and Olufayo, A.A. (2000). The effect of sun-drying on milling yield and quality of rice. Bioresource Technology. 74(3): 267-269. https://doi.org/10.1016/S0960-8524(99) 00128-5.
  9. International Rice Research Institute (IRRI). (2009). Introduction to paddy drying. Rice Knowledge Bank. http:// knowledge bank. irri. org/ rkb/ drying.html#low Retrieved November 12, 2020.
  10. Kumar, D. and Kalita, P. (2017), Reducing postharvest losses during storage of grain crops to strengthen food security in developing countries. Foods. 6(1): 8. DOI: 10.3390/foods 6010008.
  11. Kumoro, A.C., Lukiwati, D.R., Praseptiangga, D., Djaeni, M., Ratnawati, R., Hidayat, J.P. and Utari, F.D. (2019). Effect of drying and milling modes on the quality of white rice of an Indonesian long grain rice cultivar. Acta Scientiarum Polonorum Technologia Alimentaria. 18(2): 195-203. http://dx.doi.org/10.17306/J.AFS.2019.0657.
  12. Masood, S., Nisa, A.U., Hina, S. and Ahmad, I. (2018). Effects of drying pattern on aflatoxin in stored paddy rice. Bangladesh Journal of Scientific and Industrial Research. 53(4): 253-258. https://doi.org/10.3329/bjsir.v53i4.39188.
  13. Meas, P., Paterson, A.H.J., Cleland, D.J., Bronlund, J.E., John, M.A., Hardacre, A. and Rickman, J.F. (2011). Effects of different solar drying methods on drying time and rice grain quality. International Journal of Food Engineering. 7(5): Article 11. doi:10.2202/1556-3758.2378.
  14. Meas, P., Paterson, A.H.J., Cleland, D.J., Bronlund, J.E., Mawson, A.J., Hardacre, A. and Rickman, J.F. (2011). Effects of different solar drying methods on drying time and rice grain quality. International Journal of Food Engineering. 7(5). https://doi.org/10.2202/1556-3758.2378.
  15. Mujumdar, S. (2004). Guide to Industrial Drying Principles. Equipment and New Developments. IWSID: Mumbai, India.
  16. Postharvest Unit, CESD, International Rice Research Institute (IRRI). (2013). Paddy Drying. [online] International Rice Research Institute (IRRI), 16, Available at: <http://www.knowledge bank.irri.org/images/docs/training-manual-paddy-drying. pdf> [Accessed 20 November 2020].
  17. Prachayawakorn, S., Poomsa, N. and Soponronnait, S. (2005). Quality maintenance and economy with high temperature paddy drying process. Journal of Stored Product Research. 41: 333-351.
  18. Torki-Harchegani, M., Sadeghi, M., Moheb, A. and Naghavi, Z. (2014). Investigation on rough rice drying kinetics at various thin layers of a deep bed Heat Mass Transfer. 1717-1725.
  19. Truong, T., Truong, V., Fukai, S. and Bhandari, B. (2012). Changes in cracking behavior and milling quality of selected Australian rice varieties due to post drying annealing and subsequent storage. Drying Technology. 30(16): 1831-1843.
  20. Wilfred, O.R. (2006). Final survey report on the status of rice production, processing and marketing in Uganda. A report submitted to the Embassy of Japan in Uganda through JICA and Sasakawa Africa Association-Uganda, Kampala.

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